IAD

฿12,359 Find Cheap Flights to Washington Dulles Airport – Compare and Save

1 adult
1 adult, Economy, 0 bags

Save 16% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Everything you should know

Cheapest return flight
฿27,031
Typical prices: ฿35,830-฿41,429
Thai Airways
Wed 19/12Mon 15/1
BKK - IAD • 1 stop
Cheapest one-way flight
฿12,359
Typical prices: ฿21,902-฿35,572
เอทิฮัดแอร์เวย์
Tue 30/10
CNX - IAD • 1 stop
Top airlines
Best reviews • 8.4 score
Airline reviews
Airline reviews
Top routes
Cheapest • 13% average savings
Most popular
Insights
Insights
When to book
in advance
Our data shows that travellers who book at least 15 weeks in advance save around 24% compared to booking last minute.
Insights
Insights
When to travel
Cheapest • 12% price drop
Most popular
Good to know
+1
Good to know
+1
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you enjoy your trip to Washington, D.C. Dulles Intl Airport!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights to Dulles Intl

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals to Dulles Intl

Sat 26 Sep - Fri 2 Oct
Thai Airways Logo
12:40 - 22:00BKK  Bangkok Suvarnabhumi-IAD Washington, D.C. Dulles Intl
20h 20m1 stop Taipei City Taiwan Taoyuan Intl
Thai Airways Logo
01:15 - 10:40IAD  Washington, D.C. Dulles Intl-BKK Bangkok Suvarnabhumi
22h 25m1 stop Taipei City Taiwan Taoyuan Intl
฿26,602Thai Airways
Sat 19 Dec - Fri 15 Jan
Thai Airways Logo
12:40 - 20:55BKK  Bangkok Suvarnabhumi-IAD Washington, D.C. Dulles Intl
20h 15m1 stop Taipei City Taiwan Taoyuan Intl
Thai Airways Logo
23:55 - 10:50IAD  Washington, D.C. Dulles Intl-BKK Bangkok Suvarnabhumi
22h 55m1 stop Taipei City Taiwan Taoyuan Intl
฿27,031Thai Airways
Sat 19 Dec - Fri 15 Jan
Thai Airways Logo
12:40 - 20:55BKK  Bangkok Suvarnabhumi-IAD Washington, D.C. Dulles Intl
20h 15m1 stop Taipei City Taiwan Taoyuan Intl
Thai Airways Logo
23:55 - 10:50IAD  Washington, D.C. Dulles Intl-BKK Bangkok Suvarnabhumi
22h 55m1 stop Taipei City Taiwan Taoyuan Intl
฿27,461Thai Airways
Wed 4 Nov - Wed 31 Mar
เอทิฮัดแอร์เวย์ Logo
08:30 - 09:05BKK  Bangkok Suvarnabhumi-IAD Washington, D.C. Dulles Intl
36h 35m1 stop Abu Dhabi Zayed Intl
เอทิฮัดแอร์เวย์ Logo
15:10 - 07:15IAD  Washington, D.C. Dulles Intl-BKK Bangkok Suvarnabhumi
29h 05m1 stop Abu Dhabi Zayed Intl
฿32,649เอทิฮัดแอร์เวย์
Mon 26 Oct - Tue 12 Jan
เอทิฮัดแอร์เวย์ Logo
02:55 - 10:05BKK  Bangkok Suvarnabhumi-IAD Washington, D.C. Dulles Intl
42h 10m1 stop Abu Dhabi Zayed Intl
เอทิฮัดแอร์เวย์ Logo
14:35 - 18:00IAD  Washington, D.C. Dulles Intl-BKK Bangkok Suvarnabhumi
39h 25m1 stop Abu Dhabi Zayed Intl
฿32,649เอทิฮัดแอร์เวย์
Tue 27 Oct - Fri 29 Jan
เอทิฮัดแอร์เวย์ Logo
08:30 - 10:05BKK  Bangkok Suvarnabhumi-IAD Washington, D.C. Dulles Intl
36h 35m1 stop Abu Dhabi Zayed Intl
เอทิฮัดแอร์เวย์ Logo
14:35 - 11:45IAD  Washington, D.C. Dulles Intl-BKK Bangkok Suvarnabhumi
33h 10m1 stop Abu Dhabi Zayed Intl
฿32,649เอทิฮัดแอร์เวย์
Tue 27 Oct - Tue 12 Jan
United Airlines Logo
09:10 - 16:40BKK  Bangkok Suvarnabhumi-IAD Washington, D.C. Dulles Intl
42h 30m1 stop Tokyo Haneda
United Airlines Logo
10:15 - 11:30IAD  Washington, D.C. Dulles Intl-BKK Bangkok Suvarnabhumi
37h 15m3 stops Chicago O'Hare Intl Los Angeles Los Angeles Hong Kong Intl
฿34,004United Airlines
Tue 27 Oct - Tue 12 Jan
United Airlines Logo
09:10 - 10:10BKK  Bangkok Suvarnabhumi-IAD Washington, D.C. Dulles Intl
36h 00m1 stop Tokyo Haneda
United Airlines Logo
10:15 - 05:10IAD  Washington, D.C. Dulles Intl-BKK Bangkok Suvarnabhumi
30h 55m2 stops Chicago O'Hare Intl Tokyo Haneda
฿34,004United Airlines
Wed 4 Nov - Mon 9 Nov
Korean Air Logo
00:20 - 09:50CNX  Chiang Mai-IAD Washington, D.C. Dulles Intl
21h 30m1 stop Incheon Intl
Korean Air Logo
11:50 - 22:45IAD  Washington, D.C. Dulles Intl-CNX Chiang Mai
22h 55m1 stop Incheon Intl
฿38,102Korean Air
Sun 1 Nov - Fri 2 Apr
Korean Air Logo
23:15 - 09:50BKK  Bangkok Suvarnabhumi-IAD Washington, D.C. Dulles Intl
22h 35m1 stop Incheon Intl
Korean Air Logo
13:15 - 23:35IAD  Washington, D.C. Dulles Intl-BKK Bangkok Suvarnabhumi
23h 20m1 stop Incheon Intl
฿38,168Korean Air
Booking Insights

Price, demand, and travel trends for Thailand to Washington, D.C. Dulles Intl Airport flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights from Thailand to Washington, D.C. Dulles Intl Airport with more confidence.

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

Bangkok Suvarnabhumi Airport to Washington, D.C. Dulles Intl Airport is the cheapest route at ฿27,031 return, found in the past 5 days on KAYAK. KAYAK data shows this is also the most popular route.

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

A return flight to Washington, D.C. Dulles Intl Airport costs ฿38,656 on average, based on data over the past 12 months on KAYAK. Return fares from Bangkok Suvarnabhumi Airport average ฿38,684, while Chiang Mai runs a bit higher at ฿39,789.

What is the cheapest day to fly to Washington, D.C. Dulles Intl Airport?

Friday is the cheapest day to fly to Washington, D.C. Dulles Intl Airport at ฿36,846 return on average over the past 12 months on KAYAK. Monday is the most expensive at ฿41,109.

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

  • March is the cheapest month to fly to Washington, D.C. Dulles Intl Airport with an average price of ฿34,202 return.
  • January (฿40,646) and February (฿40,084) are the most expensive.
  • Based on KAYAK data over the past 12 months.

What is the cheapest time of day to fly to Washington, D.C. Dulles Intl Airport?

Morning flights to Washington, D.C. Dulles Intl Airport are the cheapest at ฿34,896 return on average. Afternoon flights are the most expensive at ฿41,605.

What is a good deal for flights to Washington, D.C. Dulles Intl Airport?

Flights under ฿35,830 are considered a good deal. 25% of KAYAK users found return flights to Washington, D.C. Dulles Intl Airport at or below these prices, with the lowest fares from:

  • Chiang Mai ฿34,864
.

When are flights to Washington, D.C. Dulles Intl Airport the cheapest?

Flights to Washington, D.C. Dulles Intl Airport are cheapest 15 weeks before departure. Booking in this window typically costs about 24% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Key details for flights to Washington, D.C. Dulles Intl Airport

Low season

January

Cheapest flight

฿12,359
Best time to beat the crowds but there is an average 5% increase in price.
Most popular time to fly (1% more expensive on average)
Flights from Chiang Mai to Washington, D.C. Dulles Intl Airport

When to book flights to Dulles Intl

Are your dates flexible? Find out the best times to travel to Dulles Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price

Your questions about flights to Washington, D.C. Dulles Intl Airport, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines, and booking questions.

  • What is the difference between the most popular and the most frequent airline at Washington, D.C. Dulles Intl Airport?

    เอทิฮัดแอร์เวย์ operates the most flights from Thailand to Washington, D.C. Dulles Intl Airport at 0 per week, while Qatar Airways is the airline most often selected by KAYAK users searching for flights from Thailand to Washington, D.C. Dulles Intl Airport. The two are often different because flight volume reflects an airline's schedule, while popularity reflects traveller choice.

  • Which airports serve Washington, D.C. and the surrounding area?

    Flights to Washington, D.C. can arrive at several major airports serving the metro area, including Washington, D.C. Reagan-National (DCA) and Washington, D.C. Dulles Intl (IAD). Nearby alternatives within 80.5 km of Washington, D.C. include Washington, D.C. Reagan-National (DCA), Fort Meade Tipton (FME) and Baltimore/Washington (BWI). These airports are not in Washington, D.C. itself but may be useful depending on your route, airline, and onward travel plans.

  • Where can I fly from to get the cheapest fares to Washington, D.C. Dulles Intl Airport?

    Based on fares booked in the past 5 days, the cheapest flights to Washington, D.C. Dulles Intl Airport are from:
    • Bangkok, from ฿27,031 return

  • How do I know if a flight to Washington, D.C. Dulles Intl Airport is a good deal?

    A good deal on a flight to Washington, D.C. Dulles Intl Airport is around ฿35,830 return. This fare is in the lowest 25% of return flight prices searched on KAYAK, averaged across the cities most often searched as origins by KAYAK users.

  • How expensive are last-minute flights to Washington, D.C. Dulles Intl Airport?

    Last-minute fares to Washington, D.C. Dulles Intl Airport – booked within 2 weeks of departure – run 7% above the average return fare of ฿38,656.

Your guide to booking Washington, D.C. Dulles Intl Airport flights

From booking to airport arrival, find tips to help you plan your flight with more confidence.
  • For the best chance at a low fare to Washington, D.C. Dulles Intl Airport, aim to book around 15 weeks before you fly. That window historically saves about 24% versus last-minute pricing based on KAYAK booking data over the last 12 months.
  • For flights to Washington, D.C. Dulles Intl Airport, recent KAYAK data shows that stronger deals tend to be around ฿35,830 return. If you see a fare below that threshold, it's a good deal – book before the price climbs back up.
  • If you can choose when to go, aim to travel to Washington, D.C. Dulles Intl Airport in March. Return fares historically average ฿34,202 that month – typically the cheapest month to travel based on the last 12 months.
  • Before you book:

    • Check the route's typical price range so you can spot a deal.
    • Confirm baggage fees and seat selection costs on budget carriers.
    • Verify whether you need any travel documents beyond an ID.
    • Pick a departure airport, since your nearest may not be the cheapest origin.
  • Shift your departure to morning to save up to ฿6,708 per return. Morning flights to Washington, D.C. Dulles Intl Airport average ฿34,896 compared to ฿41,605 for midday flights. See the time-of-day chart above for the full breakdown.
  • Once you arrive in Washington, D.C. Dulles Intl Airport, a few great places to start are Vietnam Veterans Memorial and Nationals Park. These are popular with first-time visitors and can give you a good feel for the area.

Reviews of the top 3 airlines flying to Dulles Intl

 
Need help choosing which airline to fly with to Dulles Intl? 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 1220 reviews
8.2Entertainment
8.1Food
8.7Crew
8.3Comfort
8.5Boarding
Airline reviews

The business class is excellent. I loved the food, and the crew was very attentive and professional. From boarding to arrival, everything felt smooth and well-organised.

10.0 ExcellentFiruz, Apr 2026
Read more Korean Air reviews

The business class is excellent. I loved the food, and the crew was very attentive and professional. From boarding to arrival, everything felt smooth and well-organised.

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

Great service and comfort level. You can have more of vegetarian food options.

It’s great, long flight and arrive safe at destination

Everything was excellent as I expected. They also had a very caring crew. I had a headache and asked a Tylenol. The crew members kept checking with me how I was doing.

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.

I can't believe they put my wife and I in the two middle seats! It is a very long flight and we had single flyers on either side of us blocking the way to the bathroom! There's no reason to not give one of us the isle seat so we could have managed bathroom needs and snacks with convenience. So I think very poorly of Korean air to put us both in the middle, I've never had that happen before and will probably avoid this airline in the future because of this. We tried to have them change it but they didn't so you pretty much lost a customer because of it.

One of the flight attendants stepped on my foot. I was on the aisle seat. A lady inside needed to get out. So Instood. Just then, a flight attentendant came wuicklybtheoughbthe aisle and stepprd on my sock covered toes. I let out a small sound. She stopped momentarily, but didn’t ask how I was just took off of the aisle. Never came back to see how I was. Fortunately, I was not really hurt other than a slight soreness in my toes. But I found that to be very negligent.

Korean Air is unlike any other major airline I have flown with. The grace and respect that the staff has from check in to de-boarding is unmatched. The flight attendants this time were especially wonderful to my five little children. They helped us rearrange to more suitable seating, brought our children’s meals, and patiently waited for them in the aisles when they had to use the bathroom. We felt so welcome and comfortable. I really appreciate the meal voucher when our flight was delayed. I am grateful to have had such an stress-free experience.

It's good overall. Flight was packed. Inflight entertainment choices were lacking.

Awful!!!. I do not recommend United. The flight staff are unhappy and don't attempt to make the passengers feel comfortable or welcome. The food is not edible, and the seats are miserable. My expensive luggage was destroyed, and the ticket prices are too much for the experience.

On time, easy boarding. Anytime you sit in an economy seat, it’s uncomfortable. New plane and the bathrooms were in the galley at the back of the plane which seemed odd.

Did not like the check in guy quibbling over a couple pounds at the luggage weigh in

Just having a little bit more legroom would've been nice.

This is related to my second leg of the flight, from Washington DC to SFO. I understand things happen, but I got home at 3 am for a 12:59 am landing. I live 10 min from the airport. Bridge breaks when a few rows of the plane are off? Maintenance didn’t catch that?

Great Brasilia aircraft - not a Boeing 757 like the next part of the flight. Flight from MCI to IAD was great, on-time, comfortable, did I mention that? The flight from IAD to EDI was painful. One of the reasons I won't fly United again? Boeing 757, with a seat pitch and material that was horrendous. Worst aircraft ever, made worse by United sardine-can tight seating. Oh, and the connection window, 45 minutes, really? At IAD, in different concourses? What idiot came up with that flight scenario? Happily, (for me and my travel insurance people) the flight was late (reminiscent of American Airlines). The crew was professional and courteous.

great starting with the business Class that's was Amazing . thank you United Airlines and brussels Airlines

Best flight in years. Pre-boarding because of my mobility issues. Good food and beverage from beginning to end. Excellent choice of films. Good service by stewardesses. Comfortable seats. I could lie down!

No drink service but there was no N/A as an option to choose. Seats were extremely tight. I am under 5.5 and I bumped my knees have no idea how taller people could manage.

Bad check in experience. Dirty ancient aircraft. Truly awful food and this in Business/ First class.

Good could be better. Crew is good but not great. Not much snack options for kids. Bathrooms were not cleaned on time

The crew were really bad mannered! And spoiled all my mood throughout the flight!

Limit the number of usage of wine or please arrange our seats. The passenger was drunk on this flight and not on Thiruvananthapuram to Abudhabi.

The seats seemed smaller than other business class offerings. The entertainment menu was limited. Flight crew was good.

It was excellent service in the snow storm gives us hotel and transportation. It will be more better if u can add one more meal because it’s a long flight boring journey. If you give extra meal time passes faster and can enjoy the trip better

Food quality and varites were very minimum. Surprised to have no desserts. Business class tickets should have lounge access and seats selection. They should be allowed to board while people with wheel chair, secial assistance and family with childrem.

Good flight. There were a few issues with the flat bed. It was some technical issues. Otherwise everything was good

The crew could have been more friendly and could have offered to make the beds. Also, Ethiad should have more vegetarian food options.

1st of all on February 27th Abu Dhabi to Delhi flight the seat wasn't comfortable at all, coming back the Lounge at Abu Dhabi didn't have anything. Than the Food in the flight

Overall mediocre experience. Check in was good. They're were discriminatory. They were not attentive, food choices were not vegetarian friendly. The food served was frozen.

Travelling to a place near Dulles Intl?

Book flights to Dulles Intl if you plan to visit one of these locations
Alexandria
Ashburn
Towson
Fairfax
Arlington
Silver Spring
Bethesda
Falls Church

More options for your flight to Dulles Intl