SEA

฿16,690 Find Cheap Flights from Bangkok to Seattle – Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Bangkok to Seattle departing on 6/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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1 adult, Economy, 0 bags

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Everything you should know

Cheapest return fare
฿25,422
Typical prices: ฿28,327-฿32,911
Korean Air
Fri 28/8Thu 10/9
BKK - SEA • 1 stop
Cheapest one-way flight
฿16,690
Typical prices: ฿14,608-฿18,403
STARLUX Airlines
Sun 6/9
BKK - SEA • 1 stop
Top airlines
Cheapest • from ฿25,556 (return)
Best reviews • 8.5 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
in advance
Our data shows that travellers who book at least 3 weeks in advance save around 29% compared to booking last minute.
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Bangkok to Seattle

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Bangkok to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Bangkok to Seattle

Fri 28 Aug - Thu 10 Sep
Korean Air Logo
21:40 - 11:00
BKK
-
SEA
27h 20m
1 stop
Korean Air Logo
12:50 - 21:45
SEA
-
BKK
18h 55m
1 stop
฿25,422Korean Air
Wed 9 Sep - Fri 18 Sep
Korean Air Logo
02:35 - 10:40
BKK
-
SEA
22h 05m
1 stop
Korean Air Logo
12:50 - 21:45
SEA
-
BKK
18h 55m
1 stop
฿25,556Korean Air
Thu 3 Sep - Fri 11 Sep
Asiana Airlines Logo
01:35 - 15:15
BKK
-
SEA
27h 40m
1 stop
Asiana Airlines Logo
00:10 - 10:40
SEA
-
BKK
20h 30m
1 stop
฿25,657Asiana Airlines
Sun 6 Sep - Sun 13 Sep
เดลต้า Logo
21:40 - 13:37
BKK
-
SEA
29h 57m
1 stop
เดลต้า Logo
13:00 - 21:45
SEA
-
BKK
18h 45m
1 stop
฿25,892เดลต้า
Thu 22 Oct - Fri 6 Nov
เดลต้า Logo
23:30 - 13:14
BKK
-
SEA
27h 44m
1 stop
เดลต้า Logo
13:00 - 00:45
SEA
-
BKK
20h 45m
1 stop
฿25,892เดลต้า
Tue 20 Oct - Tue 27 Oct
Asiana Airlines Logo
11:45 - 15:15
BKK
-
SEA
17h 30m
1 stop
Asiana Airlines Logo
00:10 - 11:15
SEA
-
BKK
21h 05m
1 stop
฿25,959Asiana Airlines
Mon 21 Sep - Sun 18 Oct
China Airlines Logo
17:30 - 19:15
BKK
-
SEA
15h 45m
1 stop
China Airlines Logo
01:15 - 16:20
SEA
-
BKK
25h 05m
1 stop
฿26,631China Airlines
Mon 21 Sep - Sat 17 Oct
China Airlines Logo
17:30 - 19:15
BKK
-
SEA
15h 45m
1 stop
China Airlines Logo
01:15 - 16:20
SEA
-
BKK
25h 05m
1 stop
฿26,631China Airlines
Wed 23 Sep - Sat 17 Oct
STARLUX Airlines Logo
13:10 - 16:10
BKK
-
SEA
17h 00m
1 stop
STARLUX Airlines Logo
01:15 - 12:00
SEA
-
BKK
20h 45m
1 stop
฿27,135STARLUX Airlines
Tue 25 Aug - Mon 31 Aug
STARLUX Airlines Logo
17:50 - 16:35
BKK
-
SEA
36h 45m
1 stop
STARLUX Airlines Logo
01:15 - 12:00
SEA
-
BKK
20h 45m
1 stop
฿27,336STARLUX Airlines
Booking Insights

KAYAK's insights & trends for Bangkok to Seattle flights

Get data-powered insights and trends into flights from Bangkok to Seattle to help you find the cheapest flights, the best time to fly and much more.

How much is a return flight from Bangkok to Seattle?

This analysis is based on the cheapest return trip price found on KAYAK in the last 12 months by searching for a flight from Bangkok to Seattle departing in September.

Flight prices are below average for this route right now.

Flights to Seattle from Bangkok usually cost between ฿29,250 and ฿34,926 in September.
The lowest price found in the past 5 days was ฿25,556 on Korean Air (9 Sep–18 Sep).

What is the cheapest month to fly from Bangkok to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Bangkok to Seattle, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Bangkok to Seattle is March, where tickets cost ฿24,918 (return) on average. On the other hand, the most expensive months are August and July, where the average cost of round-trip tickets is ฿33,750 and ฿30,728 respectively.

How far in advance should I book a flight from Bangkok to Seattle?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Bangkok to Seattle, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Bangkok to Seattle, you should book around 3 weeks before departure, which saves you about 29% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Good to know

Cheapest flight

฿16,690
Flight from Bangkok Suvarnabhumi Airport to Seattle

When to book flights from Bangkok to Seattle

Are your dates flexible? Find out the best times to travel from Bangkok to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Bangkok to Seattle

  • What is the cheapest flight from Bangkok to Seattle?

    In the last 5 days, the lowest price for a flight from Bangkok to Seattle was ฿16,657 for a one-way ticket and ฿25,556 for a return.

  • Which airports will I be using when flying from Bangkok to Seattle?

    There are 2 airports in Bangkok (Bangkok Suvarnabhumi and Bangkok Don Mueang Intl.) and only 1 airport in Seattle (Seattle/Tacoma Intl). The cheapest flights are generally found on the Bangkok Suvarnabhumi Airport to Seattle/Tacoma Intl flight route.

  • Which aircraft models fly most regularly from Bangkok to Seattle?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Bangkok to Seattle?

    SkyTeam, and Star Alliance are the airline alliances operating flights between Bangkok and Seattle, with SkyTeam being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Bangkok to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Bangkok to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Bangkok to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Bangkok is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Bangkok to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Seattle with an airline and back to Bangkok with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Bangkok to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Bangkok up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines flying from Bangkok to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Bangkok to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Bangkok to Seattle? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.5
EVA AirOverall score based on 1506 reviews
8.7Crew
8.0Entertainment
8.3Comfort
8.1Food
8.4Boarding
Airline reviews

First international flight where the meals were not to my taste.

8.0 ExcellentIvonny, Jul 2026
TPE - SEA
Read more EVA Air reviews

First international flight where the meals were not to my taste.

Its fantastic!!I like the food the serve in EVA air😊

Service in BKK was very good at answering our question about our canceled flight from Taipei to San Francisco. Did like the lead time about the canceled flight from Taipei to San Francisco and was not given the best options.

Awful had to ask for a supervisor to sit with my flight companion even t booked the tickets together weeks before

I have never heard of EVA air before but I am so happy my wife and I were able to flight on their planes twice. Everything on these flights just felt better than their competitors. As someone with longer legs any bit of extra leg spaces is appreciated. The different options for food and drinks were also a plus. They were extra careful to make sure my wife's eating restrictions were taken care for. They had a before take off and landing announcements on the built in tablets for each seat and it gave out information that was very helpful. Such as what and how to declare your items in the specific country you landed in, any odd items that may be illegal to bring it (and even the reasoning why) and any other information you might need to make your post flight experience better. Oh and the seats were more comfortable, had more ability to lean and the headrest was much better for flight sleeping. The only downside was there were "forced" ads on the tablet at take off for maybe 5-10 minutes but honestly, this flight was the cheapest option and had all the benefits listed above that is such an easy trade off. Im keeping an eye out for EVA air going forward.

The flight attendants should be nicer, on my first flight I told them I’d prefer a veggie meal sometimes and then she began to lecture me about it, it was a late flight and I wanted an easy digestion meal so that I can sleep quickly. The meals were abit odd, breakfast on my last flight had eggs, oatmeal and fish, did not taste good at all, strange combination. The economy seats are very tight and crowded, not comfortable at all. Overall for the price I paid I thought I was going to get more.

Great but I am not sure why I was placed in zone 4 for boarding despite being an Infinity Member??? Can you explain online. Thanks

Plane is new and I was upgraded to first class so all was great.

I was expecting that movie selection and food would have been better. Everything else was great.

Eva is one of the top airlines in Asia... but often are over priced. Finally found a reasonable rate.

When requesting water, make sure, as a passenger, you specify cold or ice added to your cup

This was the first time traveling with China Airlines. The Crew, were all professional and bilingual. The aircraft was clean and comfortable. I upgraded to even more space; that process was simple and not super expensive. The meals served were adequate and tasty, and the choices were suitable. After experiencing long flights and being a passenger with China Airlines, I must say I will travel with them again Sincearly Anthony

We really enjoyed our flight to Seattle. The food was great and service was attentive.

Been flying with China Airline over years many times. Good experience with them, no issues.

Airline itself is great. While food was being taken off of my tray my beer spilled which was a total accident and I wasn’t upset about that, what was frustrating was I had to ask for towels to clean up and wipe my leg. It would have been left as is if I hadn’t.

Bars and restaurants in Taipei close early. The lounge isn’t very good, but better than the public areas.

My flight to Los Angeles was canceled Had to book another flight and you charged me extra $500 Very bad experience

3 of the 4 flights had delays despite the weather being fine, but still managed to make all connections

Baggage made it successfully to destination despite short layover. Appreciate that.

The plane was an older model and the entertainment was hard to enjoy on those small screens. I struggled to see clear anything I wanted to watch. The seats where a bit uncomfortable but for a 3 hours flight it was pretty ok. The rest of services were excellent. Highly recommend China Airlines to others.

Food could be better it was okay. Entertainment seems dated it was something but in this day and age could be a lot better.

The aircraft was massive (A-380) and became crowded with 400+ passengers on board.

I had a bad experience coming from America to Thailand. On my connecting flight my check in suitcase was not put on the departing aircraft, I received my suitcase 24 hours after arriving in Bangkok and when I open my luggage my hand swelled up. The next morning when I put on an outfit from my suitcase my face swelled up and became numb. My entire vacation was ruined it seems that some kind of chemical was sprayed into suitcase and ruined my clothes and got me sick. The staff at my hotel called the airline and spoke to someone and they told me to file a complaint and gave my a website to do so. I did not file a complaint I felt like it would have fell on death ears. I had to throw away my brand new vacation clothes and suitcase and I had the worst vacation ever due to this happening to me.

Staff always with a smile and very helpful with my mom who has mobility issues.

Great service. They could offer vegetarian food and do more to reduce waste.

Very comfortable seats, delicious meals, and friendly and helpful staff

Staff was excellent. Food could use more variety. -More vegetable options. Menu didn't have juice or soda listed. -The croissants were outstanding!

Asian Vegitarian food was test less No Salt or pepper served Need to improve with Chef who can caters for Peaple from India I am sure Chef knows different varieties of food Indian People like

Airfare was ok . Food not good , seat ok but not comfortable. Lay over too long , crew was ok Overall just ok

2 things that really tanked our experience with this trip with Asiana Airline (which used to be among my favorite airlines): 1) The "random" security screening at the boarding gate is crazily thorough (which is completely redundant to the security screening before we went through the security checkpoint before getting into the gate area), and the water was acquired inside of the gate area (from a lounge operated by the Inchon airport). We were asked to take out *EVERY* single items from the carry-on luggage and open up every comtainers / bags / packages to inspect. To add to it, there were two inspection workers there (one seemed to be a trainee and the other seemed to be a trainer), and the trainer worker held a very unfriendly / arrogant attitude towards us. As the youngest member (a minor) of my family was being "screened", the rest of my family wanted to make sure that no inappropriate actions would happen to her. That trainer worker yelled at us and attempted to use rude body language (waving her hands) and facial expression to ask us to stay away. 2) The luggage handling at the destination was really *REALLY* bad. Among my 25+ years of travel experiences, I'm going to have to say that this was the worst luggage experience where we didn't lose our luggage. Our flight was scheduled to land 12:45pm, and landed around 1pm. 15mins delay in landing is absolutely normal. Deplane process took a bit longer than usual flight (we waited for around 20mins, after arriving at the gate, before people were able to actually leave the plane). However, the luggage took another *2 HOURS* to arrive at the baggage claim carousel. This is insane. What's worse is, due to the delay in luggage, the flurry of passengers from our flight collided with 3 other incoming flights. The US border / custom line was like the longest Disneyland attraction line winding through the entire arrival hall and around all the baggage claim carousels (like at least a thousand people). I've never seen anything like that at SeaTec airport (US border control), period. The luggage claim experience really tanked our trust and overall impression for Asiana Airline's Seattle airport ground operational effectiveness and efficiency. This has to change in order for them to remain relevant / in-business with increased competitions from Korean Air and other Asia-based airlines.

They did everything right and everything happened right on time.

Not really a “Delta” problem but worth mentioning: Boarding was a difficult process. TSA seemed understaffed and Pre-Check took longer than regular TSA. The supervisor was frazzled and yelled at travelers. Once through TSA, we had to put our carry-ons through another x-ray machine. Then queue up to board with both boarding pass and ID. Then, when we got to the stairs on the tarmac, we had to show our boarding pass again. Maybe this is just normal for Kona since the terminal is outdoors (but still a “secured” area).

Checkin was good, fllight ws good. Onlly complaint is lack of foot on 6 hour flight from Seattle to Boston. Snacks were flimsy - chips and cookies. could have offered something more substantial for such a long flight. I know you can buy food in airport but for the price you pay for a ticket, they should step up for the passengers.

Much better than I expected. I had an economy ticket so I was really happy the flight was so comfy and the service so generous. Passengers were all polite too.

Flight was delayed, we could have been notified earlier and in a consistent manner. App was not refreshing for another passenger to get the latest flight status. We could have stayed and waited at the hotel instead of waiting at the airport had we known the flight was going to delayed for more than 5 hours. The toilet is too tight, and needs to be cleaned more frequently (every hour). The entertainment screen froze, the touch screen not responding to touch. We were upgraded to comfort, it is more comfortable than regular economy seats.

It was fine. 55 minute flight. No snacks or beverage service offered. Boarding went smoothly and my walker was waiting for me on the jet way.

My flight was cencaled due with the bad weather on Sunday the crew was poorly mistaken my luggage supposed depart with my flight instead I didn’t have my luggage for almost 3 days the website is poorly respond to my complain until I have someone to do it my connection smooth their not even respon or email me even the have my luggage

8 hours late and the plane smelled like urine, that smell in the morning when your child wet the bed in the night.

Everything was good except wifi and a leaking drink chiller. The floor was all wet and my bag was soaked. Did not notice until debarking. Have not heard back from Delta. Even though this was leg one of an international flight in first class, they denied access to their Sky Club - very disappointing!

Prior to takeoff, the pilot told us there was a possibility of not being able to land and going to Portland. Well that happened, we took off and then did 8 loops around Spokane before the pilot told us we ran out of fuel and had to go to Portland. So for a 35 minute flight we have now been on the plane for 3 hours (boarded at 6:50 am and landed in Portland at 10:30). Then, we just sat in Portland's airport with no updates of when we can start heading back. All of a sudden, our pilots and crew just left, leaving us stranded in a different city and state. We continued to sit in Portland until we finally got a new crew assigned and boarded the plane (This was from 10:30-2). We then sat on the plane for an additional hour before take off because they had to count us multiple times. We finally landed in Spokane at 3:55 PM. So a flight that should have taken at max an hour took us 10 hours and we missed the majority of the recruiting event we went for.

Flight stewards were sometimes short when passengers made requests at the same time. The requests were simple but a smile & a remark of "I'll get to you soon" instead of a curt & passing "Wait a minute." Flying is not cheap & good manners should be a given when taking care of people cramped in seats for longer than ten hours. The food tasted great but doesn't look appetizing. The mid-meal break food or merienda were great in the last two flights I was on.

It was amazing with great service. But the seating could have been better if there was ample arm rest areas

Flight attendants did very well, they were all friendly and very helpful .

Everything is ok except the manner of transporting the people that includes me on a wheelchair. That was my first time cuz I was suffering from “sciatica “ and couldn’t walk well. Upon arrival at LAX it took me almost 3 hrs to get out of the airport bcuz of these wheelchairs procedures. If only I can manage to walk I should have done so OMG. Other than that so far everything is ok. THANK YOU.

Absolutely terrible. I will never fly that airline again. The problem was with the constant emails changing my seats, arrival/ departure times and the aircraft. The staff at the airports and onboard were great. Between making the appointment in May 2025 and my actual trip I had over 50 emails announcing changes. I was traveling with 3 other couples and they experienced the same thing.

My luggages were lost and the service attendant was extremely unprofessional. Despite presenting my luggage claim slips, the attendant stated she had “no record” of my bags and made no meaningful effort to assist. When I explained that the luggage contained our family’s complete scuba diving equipment, her response was dismissive, stating that she “didn’t care.” While lost luggage is frustrating on its own, the lack of professionalism and lack of empathy significantly worsened the situation.

reach the standard, crew tried to fix up issues fast.

Manila airport is a dump. Very dirty and not comfortable at all

There was something that did not work on every fligjt. No water in business class washroom and inflight entertainment system did not work in business class.

Our flights were delayed multiple times and we had less than an hour connection time before our flight took off. Arrived late with only 25 minutes before next flight but no ground crew helped us to get to our next gate even though our flight crew assured us we would get some help. Transitioned to another flight in MNL terminal 1 but got stuck at security so then had to run to make connection. To top it off our luggage didnt make it either. Paid for biz class seats but did not receive biz class experience. The flight crew, food and entertainment were all excellent. We just wish we didnt feel so stressed about connection and not having luggage until the next day.

Everything you need to know for your flight from Bangkok to Seattle

Information on your arrival and departure airports