฿18,079 Find Cheap Flights from Washington Dulles Airport to Bangkok – 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 Dulles Intl to Bangkok departing on 14/8. 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.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Bangkok

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Bangkok, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Bangkok, as well as popular online travel agencies
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Everything you should know

Cheapest return fare
฿33,543
Typical prices: ฿34,753-฿28,476
เอทิฮัดแอร์เวย์
Thu 15/10Sun 25/10
IAD - BKK • 1 stop
Cheapest one-way flight
฿18,079
Typical prices: ฿16,216-฿21,120
เอทิฮัดแอร์เวย์
Fri 14/8
IAD - BKK • 1 stop
Top airlines
Cheapest • from ฿33,543 (return)
Best reviews • 8.4 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 2 weeks in advance save around 19% compared to booking last minute.
Insights
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Dulles Intl to Bangkok (IAD-BKK)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Dulles Intl to Bangkok 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 Dulles Intl to Bangkok

Thu 15 Oct - Sun 25 Oct
เอทิฮัดแอร์เวย์ Logo
15:10 - 12:10
IAD
-
BKK
34h 00m
1 stop
เอทิฮัดแอร์เวย์ Logo
20:50 - 10:05
BKK
-
IAD
24h 15m
1 stop
฿33,543เอทิฮัดแอร์เวย์
Fri 9 Oct - Sat 6 Feb
เอทิฮัดแอร์เวย์ Logo
15:10 - 23:50
IAD
-
BKK
21h 40m
1 stop
เอทิฮัดแอร์เวย์ Logo
08:30 - 09:05
BKK
-
IAD
36h 35m
1 stop
฿33,576เอทิฮัดแอร์เวย์
Mon 10 Aug - Thu 10 Dec
เอทิฮัดแอร์เวย์ Logo
15:10 - 18:10
IAD
-
BKK
40h 00m
1 stop
เอทิฮัดแอร์เวย์ Logo
10:00 - 09:05
BKK
-
IAD
59h 05m
2 stops
฿33,641เอทิฮัดแอร์เวย์
Fri 28 Aug - Sat 5 Sep
เอทิฮัดแอร์เวย์ Logo
15:10 - 23:50
IAD
-
BKK
21h 40m
1 stop
เอทิฮัดแอร์เวย์ Logo
09:15 - 09:45
BKK
-
IAD
35h 30m
1 stop
฿33,674เอทิฮัดแอร์เวย์
Fri 9 Oct - Sun 7 Feb
เอทิฮัดแอร์เวย์ Logo
15:10 - 23:50
IAD
-
BKK
21h 40m
1 stop
เอทิฮัดแอร์เวย์ Logo
10:00 - 09:05
BKK
-
IAD
59h 05m
2 stops
฿33,706เอทิฮัดแอร์เวย์
Sat 10 Oct - Wed 3 Feb
Qatar Airways Logo
21:00 - 06:20
IAD
-
BKK
22h 20m
1 stop
Qatar Airways Logo
20:30 - 15:55
BKK
-
IAD
31h 25m
1 stop
฿33,772Qatar Airways
Sun 8 Nov - Sun 15 Nov
Qatar Airways Logo
10:40 - 19:25
IAD
-
BKK
20h 45m
1 stop
Qatar Airways Logo
18:55 - 15:55
BKK
-
IAD
33h 00m
1 stop
฿33,805Qatar Airways
Sun 6 Sep - Mon 14 Sep
Emirates Logo
10:55 - 11:25
IAD
-
DMK
37h 30m
1 stop
Emirates Logo
23:50 - 08:40
DMK
-
IAD
43h 50m
1 stop
฿38,316Emirates
Mon 31 Aug - Fri 2 Oct
Emirates Logo
10:55 - 11:25
IAD
-
DMK
37h 30m
1 stop
Emirates Logo
23:50 - 08:40
DMK
-
IAD
43h 50m
1 stop
฿38,382Emirates
Sun 13 Sep - Wed 30 Sep
Multiple Airlines Logo
21:00 - 12:40
IAD
-
DMK
28h 40m
2 stops
Multiple Airlines Logo
13:45 - 08:55
DMK
-
IAD
54h 10m
2 stops
฿39,362Multiple Airlines
Booking Insights

KAYAK's insights & trends for Dulles Intl to Bangkok flights

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

How much is a return flight from Washington, D.C. Dulles Intl Airport to Bangkok?

This analysis is based on the cheapest return trip price found on KAYAK in the last 12 months by searching for a flight from Washington, D.C. Dulles Intl Airport to Bangkok departing in October.

What is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to Bangkok?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to Bangkok, 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 Washington, D.C. Dulles Intl Airport to Bangkok is September, where tickets cost ฿21,741 (return) on average. On the other hand, the most expensive months are January and December, where the average cost of round-trip tickets is ฿58,390 and ฿29,195 respectively.

How far in advance should I book a flight from Washington, D.C. Dulles Intl Airport to Bangkok?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to Bangkok, 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 Washington, D.C. Dulles Intl Airport to Bangkok, you should book around 2 weeks before departure, which saves you about 19% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 17 weeks before departure.

Good to know

Cheapest flight฿18,079
Flight from Washington Dulles Airport to Bangkok Suvarnabhumi Airport

When to book flights from Dulles Intl to Bangkok

Are your dates flexible? Find out the best times to travel from Dulles Intl to Bangkok 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 Washington Dulles Airport to Bangkok flights

  • What airport should I use to fly out of Washington D.C.?

    The nice thing about this route is that there are great choices from all three area airports. From Washington Dulles International Airport, there is a one-stop flight aboard Turkish Airways, and from both Ronald Reagan Washington National Airport and Baltimore Washington International Airport (BWI), you can find two-stop flights aboard Air Canada.

  • What is one of the most sustainable airlines when flying from Washington, D.C. to Bangkok?

    JetBlue invests in modern and fuel-efficient aircraft to reduce its carbon emissions. The airline invests in sustainable aviation fuel (SAF) to reduce the carbon intensity of its flights. JetBlue has also implemented programs to reduce ground emissions and promote energy efficiency in its facilities. The airline has implemented recycling programs on board its aircraft and they aim to minimize single-use plastics.

  • Will I need a visa to fly from Washington D.C. to Bangkok?

    For short-term visits, most US citizens can obtain a tourist visa upon arrival at Bangkok's main international airport, Suvarnabhumi Airport. This visa is known as the Visa on Arrival (VOA) and allows for a stay of up to 30 days. Alternatively, you can also apply for a tourist visa in advance at the Royal Thai Embassy or Consulate in the United States. The tourist visa allows for a longer stay in Thailand, typically up to 60 days.

  • What is the benefit of flying in higher ticket tiers on Korean Air?

    Flying in higher ticket tiers on Korean Air, such as Prestige Class and First Class, offers cabins with more spacious seating. Many of the seats are often designed to recline into fully flat beds. Passengers have access to dedicated check-in counters, allowing for faster and more convenient check-in processes.

  • What is the cheapest flight from Washington, D.C. Dulles Intl Airport to Bangkok?

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Bangkok was ฿18,079 for a one-way ticket and ฿33,543 for a return.

  • Which airports will I be using when flying from Washington Dulles Airport to Bangkok?

    Washington Dulles Airport is served by only 1 airport and there are 2 airports in Bangkok. You will leave Washington Dulles Airport from Washington, D.C. Dulles Intl and you will be arriving in Bangkok at one of these airports: Bangkok Suvarnabhumi or Bangkok Don Mueang Intl.

  • Which aircraft models fly most regularly from Washington Dulles Airport to Bangkok?

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

  • Which airline alliances offer flights from Washington Dulles Airport to Bangkok?

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

  • How does KAYAK find such low prices on flights from Washington Dulles Airport to Bangkok?

    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 Washington Dulles Airport to Bangkok.

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

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

  • What is the Hacker Fare option on flights from Washington Dulles Airport to Bangkok?

    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 Bangkok with an airline and back to Washington Dulles Airport with another airline.

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

    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 Bangkok from Washington Dulles Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Washington, D.C. Dulles Intl Airport to Bangkok

  • A great feature of Ronald Reagan Washington National Airport (DCA) is the convenience it offers travelers. An easy way to get to this airport from the center of the city is to take the Washington Metropolitan Area Transit Authority Blue Line subway, which can have you at the airport in about 10 minutes.
  • When traveling on one of the convenient flights offered by Turkish Airways between Washington Dulles International Airport (IAD) and Suvarnabhumi Airport (BKK), it is good to know that all passengers can take one carry-on bag with them and one personal item aboard the plane. Those in business class can take an additional carry-on bag on the plane.
  • Some great reasons to travel in the higher ticket tiers aboard Turkish Airways is that it often gives you access to their lounge in Concourse B on Washington Dulles International Airport (IAD) plus when you book a Business Class ticket on this airline, you get amazing amenities like the most comfortable seats, chef-created dining, and preferred check-in.
  • Kids from 5 to 11 traveling alone on Qatar Airways will use the airline's Unaccompanied Minor service. Qatar Airways charges a handling fee for the service. Qatar Airways staff will assist the child throughout the journey, from check-in to arrival.
  • When making this trip on JetBlue, those in the Blue Basic and Blue ticket tiers can check up to two bags both for a fee. Once you move up into the Mint ticket tier, you can take these same two checked bags for free as part of your ticket purchase.

Reviews of the top airlines flying from Dulles Intl to Bangkok

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Bangkok. 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 Dulles Intl to Bangkok? 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.
8.4
Korean AirOverall score based on 1218 reviews
8.1Food
8.3Comfort
8.5Boarding
8.2Entertainment
8.7Crew
Airline reviews

AAAAHHHH... It was shocking in a very positive way, the attention to detail, the courtesy, the manners of all personnel on board, the constant honest smiling. You can see and feel they take pride in all they do no matter how trivial. The plane in general was very comfortable. I can't wait to do it again

8.0 ExcellentCarlos J, Apr 2026
TPA - ATL
Read more Korean Air reviews

AAAAHHHH... It was shocking in a very positive way, the attention to detail, the courtesy, the manners of all personnel on board, the constant honest smiling. You can see and feel they take pride in all they do no matter how trivial. The plane in general was very comfortable. I can't wait to do it again

Lousy entertainment system. Crews are excellent. Meal is just mediocre.

The boarding process was efficient and quick. The seats were comfortable. The food was good. The service was excellent. We had a lovely flight from Seattle on Korean air

Flight crew was fantastic. The aircraft was meticulously cleaned at all times. The crew was continuously checking to see if the passengers were ok.

They were trying to get people to check luggage because the over head compartments were full but when we boarded there were lots of empty places that people could have put the luggage.

It was good, I liked the self-serve snacks but it was a little difficult to get the alcohol, which is understandable since I wouldn't want kids sneaking it.

Friendly flight attendants and gate agents. Very clean plane and food was good!

I was unable to select decent seats, and so I was stuck in the middle seat because it was selected for me

There was a lot of partial tv shows but not enough to last the flight. The food was incredible! The crew were so helpful and patient. Lots more space than what I usually get on an international flight. Very comfortable!

Stingy on the drinks - 15 hour direct flight and could barely get attention for some water

Entertainment system is okay, flight attendants were ok. Leg space very narrow, I couldn’t get what I wanted to eat, dinner nor breakfast.

Excellent experience with business class area. Staff was attentive and food was amazing. Only one bathroom for business class which was logistically difficult for the staff while preparing meals. Need to offer fluids with meals. I did not get enough water to drink. But overall I rate it 5 star.

On time, great food, good drink selection! Only down was alcohol-free lounge. Lufthansa had a much better offering!

Be honest of what you sell: This was sold as Business Class on all three legs, while the JetBlue plane didn't even have business class seats, and wanted $164 for extra legroom seats.

Seat assignments for family traveling with 2 children. Loud crowd during sleep time

It was crowded… the bathrooms dirty and smelly. The seats have been made even smaller.

delayed to take off from detroit by 3 hours lost baggage in istanbul and now in venice without baggage

No control at all at the gate , passengers were not cuing up, , some were very loud , no action taken by the attendants . It looked more like a heard of animals then humans boarding a plane .

Seats were very tight with poor legroom - and I am average height. During the 12 hour flight, tiny paper cups of drinks we're only offered during the super and breakfast services, with the crew nowhere to be seen in between. One of the bathrooms was out of order, leading to long lines waiting to use the remaining two available to the economy class passengers.

short flight but we still got a very nice lunch and the crew did an excellent job in taking care of us

Everything you need to know for your flight from Dulles Intl to Bangkok

Information on your arrival and departure airports