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Find cheap flights from Thailand to Washington Dulles Airport from $562

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Dulles Intl departing on 5/24. 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
0 bags
Sat 4/27
Sat 5/4

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These are the airlines KAYAK users have selected most often from within our search results for flights to Washington, D.C.
These are the airlines KAYAK users have selected most often from within our search results for flights to Washington, D.C.
In the last 7 days travelers have searched 46,342,885 times on KAYAK, and here is why:

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Flights to Dulles Intl - Travel Insights & Trends

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

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

The average price of all flights to Washington, D.C. Dulles Intl Airport clicked on KAYAK for each day over the last 12 months.
Based on KAYAK data, the cheapest day to fly to Washington, D.C. is Tuesday where tickets can be as cheap as $1,164. On the other hand, the most expensive day to fly is Saturday, where prices are $1,426 on average.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights to Washington, D.C. Dulles Intl Airport, 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 to Washington, D.C. Dulles Intl Airport is September, where tickets cost $1,200 on average for one-way flights. On the other hand, the most expensive months are August and July, where the average cost of tickets from Thailand is $1,782 and $1,538 respectively. For return trips, the best month to travel is September with an average price of $1,200.

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

The average price for all flights to Washington, D.C. Dulles Intl Airport depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.
The cheapest time of day to fly to Washington, D.C. Dulles Intl Airport is generally in the morning, when flights cost $1,134 on average. The most expensive time of day to fly to Washington, D.C. Dulles Intl Airport is generally at night, which is peak travel time and where the average cost of a ticket is $1,378.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights to Washington, D.C. Dulles Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price, you should book around 0 weeks before departure. For the absolute cheapest price, our data suggests you should book 88 days before departure.

How long is the flight to Washington, D.C. Dulles Intl Airport?

The duration of your flight to Washington, D.C. depends on your departure and arrival airports. Obviously any flights that include a layover will also be longer. The most popular routes to Washington, D.C. on KAYAK are from Bangkok, which takes 27h 57m, and Chiang Mai, which takes 29h 08m.

How many direct flights to Washington, D.C. Dulles Intl Airport are there each day?

There are around 239 direct flights from within Thailand to Washington, D.C. Dulles Intl Airport every day. Most flights depart in the morning, with 2:00 pm the most common departure time and 47% of flights departing in the morning.

How many direct flights to Washington, D.C. Dulles Intl Airport are there each week?

Each week there are around 1,667 direct flights from within Thailand to Washington, D.C. Dulles Intl Airport. The most common day for departures is Thursday, with 15% of flights taking off on this day.

How many long-haul flights are there to Washington, D.C. Dulles Intl Airport each week?

Each week there are around 430 long-haul flights (6-12 hour flight duration), 409 medium-haul (3-6 hour flight duration) and 1,535 short-haul (up to 3 hour flight duration) flights to Washington, D.C. Dulles Intl Airport. The most long-haul flights depart from London.

How many cities have direct flights to Washington, D.C. Dulles Intl Airport?

From Thailand, there are direct flights to Washington, D.C. Dulles Intl Airport from 64 cities. The city with the most direct flights is New York, with 90 direct flights each week.

Good to know

Low season

February

High season

April

Cheapest flight

$562
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly and prices are also 5% lower on average.
Flight from Bangkok to Washington Dulles Airport

FAQs - booking Washington Dulles Airport flights

  • How far is Washington Dulles Airport from central Washington, D.C.?

    You’ll need to travel 22 miles to reach the Washington, D.C. city center from Washington Dulles Airport.

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

    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 to Washington Dulles Airport.

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

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

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

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Washington Dulles Airport with an airline and back with another airline.

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

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

  • Which airline offers the most flights to Washington, D.C. Dulles Intl Airport?

    Of the 8 airlines that fly to Washington, D.C. Dulles Intl Airport, United Airlines offers the most flights, with around 1,222 per week, followed by Delta with 188 flights per week.

See more FAQs

Top tips for finding cheap flights to Washington Dulles Airport

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Washington Dulles Airport flight deals.

Prefer to fly non-stop to Washington, D.C. Dulles Intl?

Find which airlines fly direct to Dulles Intl, which days they fly and book direct flights.

Nonstop departures

Thailand to Washington, D.C. Dulles Intl

Monday

ANA, ASKY, Aer Lingus, +65 more

ANA, ASKY, +66 more

Tuesday

ANA, ASKY, Aer Lingus, +65 more

ANA, ASKY, +66 more

Wednesday

ANA, ASKY, Aer Lingus, +64 more

ANA, ASKY, +65 more

Thursday

ANA, ASKY, Aer Lingus, +66 more

ANA, ASKY, +67 more

Friday

ANA, ASKY, Aer Lingus, +66 more

ANA, ASKY, +67 more

Saturday

ANA, ASKY, Aer Lingus, +63 more

ANA, ASKY, +64 more

Sunday

ANA, ASKY, Aer Lingus, +68 more

ANA, ASKY, +69 more

See more direct flights

Nonstop returns

Washington, D.C. Dulles Intl to Thailand

Monday

ANA, ASKY, Aer Lingus, +65 more

ANA, ASKY, +66 more

Tuesday

ANA, ASKY, Aer Lingus, +65 more

ANA, ASKY, +66 more

Wednesday

ANA, ASKY, Aer Lingus, +64 more

ANA, ASKY, +65 more

Thursday

ANA, ASKY, Aer Lingus, +66 more

ANA, ASKY, +67 more

Friday

ANA, ASKY, Aer Lingus, +66 more

ANA, ASKY, +67 more

Saturday

ANA, ASKY, Aer Lingus, +63 more

ANA, ASKY, +64 more

Sunday

ANA, ASKY, Aer Lingus, +68 more

ANA, ASKY, +69 more

See more direct flights
See more direct flights

Top 5 airlines serving from Thailand 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 KAYAK reviews.
8.5
Korean AirOverall score based on 1239 reviews
85overall
88crew
83comfort
82food
82entertainment
86boarding
Airline reviews

Ford not that great the seat not to big for leg room like other airline

Read more about Korean Air

Ford not that great the seat not to big for leg room like other airline

It was ok. Not good and not a bad experience

not too bad but not too great either. Service on all airlines declined ever since covid. Your Delta Stewardess are not that friendly at all. :-(

I like your stewardess, they are nice. However, your food could have been better and wheres your dessert? You do not offer beer or scotch. I do not drink alcohol biut my husband can have one or two, he has to ask if he can have one. during dinner or lunch, it should be offerred. Also, you do not have the most famous drinks ginger ale

Not accommodating ground staff On board slow service Crew members not very friendly

lunch was good; breakfast was kinda meh cabin temprature was way too high new entertainment system but somewhat limited content

You did not put me on a Korean Air flight! so I do not have nothing to say

My flight was diverted to Atlanta and I was not given enough time. I paid my travel on April 23, 2023. It was originally Delta from Norfolk to NY, then Korean Air from NY all the way Philippines which is my final stop. Instead from Atlanta to Korea I flew Delta which is okay. Then Korea to Philippines, I flew Asiana Airlines. What I did not like, Ieagle did not sent me an email that my flight was change and so when I went to check in Wednesday the 10th, at 4:30 a.m they told me my flight was delayed at 6;00 p.m and diverted in Atlanta and I am flying Asiana from Korea to Philippines. I do not appreciate that Kayak or Ieagle chenge our flights 5 times and then last minute change again during my day of flight. I hope that you will not make any changes of my flight o Feb 15th because it has to be the same flight with my husband. That is the reason why we made the arrangements early on.

Going through security a second time to get on the next Korean Air flight was utterly ridiculous and unnecessary. We were in a International secure area.

Food was good, but it can be better if it add a little bit of oriental flavour, service is great too.

Ticket was purchased as a United Airlines flight (operated by All Nippon) like what does that even mean? Makes for a VERY confusing flight experience. For instance, what do I look for a United drop off signage and ticket counter or ANA? No explanation anywhere to be found. I also felt a little bit scammed by the obsurdely restrictive seat selection provided. Only middle seats available!! Are you kidding me!! On 6hr + 10hr flights you're forcing me into the middle seat without telling me before I purchased the ticket?? This should be illegal. And to top it off, on the Tokyo LA leg there were quite a few empty seats including window seats! I must also say, the food was a dissappointing as well for my taste, fish with rice ( mostly plain white rice) or a vegetable medly for the breakfast meal? Should be at least 4 choices and at least 1 with eggs. Outside of these issues flight was otherwise ok.

Ground and flight crew were all courteous, extremely helpful and professional. Overall, process is really organized, from boarding to disembarkation.

This is a very long flight and the first time I have flown on a Japanese airline. I was very impressed with the staff. They worked hard and offered food and drink regularly. Plane was very well cared for. The let room was good . Food was ok but better than other airlines.

Food was high quality. Crew was extremely professional, polite, attentive. Flights were on time. Plane had good media tech.

It was ok I thought because my flight was 1pm i was expecting to have lunch but it didn’t and after 7 hr finally dinner time was only chicken sandwich and next breakfast was an hour before plane land in Tokyo. so I should bring some food with me. Japanese flight attend was nice but the other was chewing gum and how she ask and respond to customers was not professional I felt. Maybe because Japan flight attendant is highly train and everyone looked very dress and professional so I was kind disappointed. I like that the bathroom was very clean .

Lovely airport at Haneda. Great food selection. Spacious and private boarding area with dedicated bathroom for each gate.

They did not get my request for veg food that i made a month ago. Also did not have any backup veg food on board or fruit plate or simething. Very disappointing as i had hward about how grwat ANA was supossed to be. Alsio entertainment was lacking and screen and tech was subpar. Overall just mid to low tie. They are living off reputation and are being passed up by most other carriers.

I love everything about this airline but it could be better if the waiting time for boarding is on time.

The ANA Staff were great and the plane was comfortable.

Ana is absolute world class They should not work with united

Food is really bad, not to the Emirates standards. Coming out of Houston airport is very confusing,

Service needs to improve. Air hostess do not register flyers request and we need to keep on repeating our request to them on multiple occasions

The flight was great. We had to purchase extra long seats for the long flight. But overall it was great.

The experience was not as pleasant returning as leaving. Went through clearance twice, crew was not as customer focused.

WORST AIRLINE EVER—FOOD WAS MEDIOCRE AND WIDEBODY 777 BOEING WAS VERY UNCOMFORTABLE! IT WAS NOT WORTH THE MONEY THAT I PAID.

Amazing service and food. However I didn’t get chance to choose my own seat which bothered me a little.

More space all around is practically essential on long international fights, and Emirates definitely delivers. But food selection and taste was only average. Otherwise, the flight was smooth and the cabin crew service was fine.

Food was not eadable. Testless and not apealing. order for indian vegitarian, recived spice less. combination of main course and side iteams are far away from traditonal food, serve less iteams. , but eadoble. Thanks

I bought Business class ticket but they treated me like economic class. No lounge allowed at check inn I have to take stuff out while other passengers have more than 25 lb in bag. Because I bought tickets from other than airlines . It’s discriminations from airlines to passengers.

Quality and tasty Food and service, bigger seat comfort and leg room, etc.

Plane didn’t even make it off the ground. We all had to get off and walk to a different terminal (lots of confusion) to get on a different plane. Landed fairly late, connections missed.

One of the best flying experiences I’ve ever had.

The flight cancellation and process for getting a new flight was not that clear. United also had some delays that were unexpected. I am the most disappointed by the fact that I originally bought a Lufthansa ticket, only to be flown by United.

Need to have more snacks for the duration and coffee.

Crowded flight, but upbeat and kind crew. Pilot greeted us at door, flight attendant thanked a number of “special” passengers for their business, another addressed an eight-year old boy as “young man.” United obviously trying to up their game, but though all of that is nice and notable, flying still feels like moving along a human assembly line, being herded into one small space after another (boarding areas with too few seats, planes with limited personal space, shuttles (IAD) packed too full.

On time - really well operated flight. Friendly staff. Super impressed with United on this round trip.

It was ok until we got to DC and I wanted to use my United Club pass and the snobbish receptionist said that they don’t take one pass. It took me everything itch of patience not to tell her off

Food choice was poor and we had to buy on board snacks.

We were offer chocolate cookies , not everyone eat chocolate. Thank you

Lost luggage again. Our second trip to Mykonos, and 2nd time no luggage.

New ridiculous policy by american destroyed my allegiance to american. As a million miler with american, I expected it would be easy to get on an earlier flight when I got to airport earlier than expected, and save a five hour layover. WRONG. The online app would not let me switch flights, So I called, and was promised a call back in 90 minutes. HAH! The customer service desk at DCA said “we no longer have access to changing a flight on our screens. If the app couldn’t do it, I should send a letter to American, but there’s nothing else possible!”

I am tired of being nickel and dimed for seat location, checked luggage and carry on bags. That is why i rarely fly anymore.

It was right on time and crew were very courteous

Great flight. Boarding was efficient and quick. On time departure and smooth flight. Flight arrived early at destination. Good experience.

Literally the worst experience ever and I had my service dog with me. Flight was supposed to leave at 1:51 PM but the plane arrived late. They boarded us around 3 PM and kept us on the plane for an hour saying that due to weather conditions in Miami, we could not takeoff yet. After waiting for an hour, they deplaned. And then they will not give us our bags back that we could just leave and schedule for another flight. Every hour they kept updating saying we have to wait another hour without any explanation as to what was going on. Eventually, I went to customer service to change my ticket, but by the time I made it to the front of the line, they started boarding my flight again. And then when we got onto the flight, they said there were two flight attendants That were past their shift. They kept us on the plane for about another 40 minutes until they told us they had no other flight attendance and had to deplane again. Then I gave us hotel vouchers and told us we would be on a flight at 6 AM the next day. At this point it is about 9 PM. I get to the hotel with my dog, who hasn’t been able to go potty for about eight hours. When I arrived at the hotel, I got a text alert saying my flight has been canceled at 6 AM and they moved past to 5 AM, however the hotel shuttle doesn’t leave early enough to make it to the airport for 5 AM flight. So me and some other passengers got a cab after about three hours of sleep to get back to the airport. This was the worst experience ever.

Their computers were down upon arrival to the airport. They were unable to figure out how to board us. We were delayed over an hour and a half.

Delay. Flight was delayed in Washington.knew that connection was impossible as not enough time to switch terminals. The steward would not let me stay the night. So forced to Dallas.late night, after 10pm.hotel checkin was one hour. Passengers lined up only one girl to checkin at comfort inn. No food availability at that time. Had to leave early at 6:30 am to catch a flight at 8:45. Stressfull.

The experience with American Airlines was terrible from beginning to end. Flight 1210 from Cancun to Charlotte was delayed three times. AA customer service at the CUN airport could not provide information on why or how to accommodate me if I missed my connecting flight at CLT due to the delays. Upon arrival to CLT, de-boarding the plane was a horrible experience. You all should have allowed passengers with departing connecting flights within the hour, to get off the plane first! It caused so many passengers to lose valuable time waiting to get off the plane, and then the long lines in customs! American Airlines knew passengers had to make connecting flights and still chose not to hold the plane? I missed Flight 2758 from CLT to DCA for that reason. Waiting three more hours for the next - Flight 1269 from CLT to DCA. Once again another delay at the last possible minute before boarding due to the plane going out of service/maintenance. Once the new plane boarded, we sat on the tarmac for 40min. I did not arrive to DCA until 12:33am. I spent over 12hours at the airport and I plan to never fly American Airlines again.

I don't like that I have to pay if I want extra leg room. The seats are so expensive; I sit in normal seats and my legs and knees cramp the entire flight. I never feel comfortable on AA flights.

American always delays flight so it stressful getting the next connection

Book cheap flights from Thailand to Washington, D.C.

Recent round-trip flight deals

 
These are the cheapest round-trip flights to Washington, D.C. found on KAYAK in the last 72 hours.
5/28Tue
1 stopANA
24h 00mBKK-IAD
11/5Tue
2 stopsANA
39h 45mIAD-BKK
$935
5/15Wed
1 stopANA
24h 00mBKK-IAD
8/15Thu
2 stopsANA
28h 40mIAD-BKK
$937
4/30Tue
1 stopUnited Airlines
41h 10mBKK-IAD
10/15Tue
2 stopsUnited Airlines
33h 00mIAD-BKK
$951
4/17Wed
2 stopsUnited Airlines
46h 26mBKK-IAD
5/6Mon
1 stopUnited Airlines
29h 10mIAD-BKK
$956
9/23Mon
1 stopKorean Air
24h 35mBKK-IAD
10/18Fri
1 stopKorean Air
23h 10mIAD-BKK
$1,110
5/9Thu
2 stopsAmerican Airlines
26h 32mBKK-IAD
6/1Sat
2 stopsAmerican Airlines
29h 10mIAD-BKK
$1,160
5/10Fri
2 stopsAmerican Airlines
41h 42mBKK-IAD
6/2Sun
2 stopsAmerican Airlines
36h 00mIAD-BKK
$1,190
4/30Tue
1 stopKorean Air
36h 25mBKK-IAD
10/13Sun
1 stopKorean Air
23h 10mIAD-BKK
$1,200
9/10Tue
1 stopQatar Airways
41h 15mBKK-IAD
11/6Wed
1 stopQatar Airways
28h 45mIAD-BKK
$1,201
5/6Mon
1 stopQatar Airways
34h 00mBKK-IAD
10/19Sat
1 stopQatar Airways
33h 10mIAD-BKK
$1,248

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Recent one-way flight deals

 
Only flying one-way? Below are some of the best deals for one-way flights to Washington, D.C. found on KAYAK in the last 72 hours.
5/24Fri
1 stopAir China
30h 35mBKK-IAD
$562
5/20Mon
1 stopAir China
24h 55mBKK-IAD
$563
5/1Wed
1 stopKorean Air
24h 35mBKK-IAD
$784
4/29Mon
1 stopKorean Air
36h 25mBKK-IAD
$806
4/16Tue
1 stopANA
24h 00mBKK-IAD
$839
4/18Thu
1 stopEmirates
40h 10mBKK-IAD
$847
5/2Thu
1 stopEmirates
41h 15mBKK-IAD
$851
4/16Tue
1 stopANA
24h 00mBKK-IAD
$869
4/18Thu
3 stopsUnited Airlines
30h 46mBKK-IAD
$871
4/25Thu
3 stopsUnited Airlines
50h 30mBKK-IAD
$878

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Last minute flights to Dulles Intl

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights to Washington, D.C. that are departing in the next 10 days.
4/2Tue
multi-stopSWISS
38h 30mBKK-IAD
4/30Tue
multi-stopSWISS
29h 00mIAD-BKK
$1,211
4/2Tue
multi-stopUnited Airlines
46h 26mBKK-IAD
6/11Tue
multi-stopUnited Airlines
48h 12mIAD-BKK
$1,228
4/2Tue
multi-stopAmerican Airlines
34h 00mBKK-IAD
5/3Fri
multi-stopAmerican Airlines
22h 05mIAD-BKK
$1,381
4/1Mon
multi-stopEmirates
42h 25mBKK-IAD
5/3Fri
multi-stopEmirates
21h 00mIAD-BKK
$1,394
3/30Sat
multi-stopEmirates
42h 35mBKK-IAD
5/3Fri
multi-stopEmirates
21h 00mIAD-BKK
$1,435
4/1Mon
multi-stopQatar Airways
42h 05mBKK-IAD
5/1Wed
multi-stopQatar Airways
21h 10mIAD-BKK
$1,650
4/1Mon
multi-stopQatar Airways
42h 05mBKK-IAD
5/3Fri
multi-stopQatar Airways
21h 10mIAD-BKK
$1,665
4/1Mon
multi-stopANA
25h 01mBKK-IAD
5/2Thu
multi-stopANA
29h 20mIAD-BKK
$2,325
4/1Mon
multi-stopANA
24h 00mBKK-IAD
4/28Sun
multi-stopANA
28h 29mIAD-BKK
$2,344
4/2Tue
multi-stopAmerican Airlines
24h 10mBKK-IAD
4/14Sun
multi-stopAmerican Airlines
50h 51mIAD-BKK
$4,318

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Flights to Washington Dulles Airport

Destination:

Washington Dulles Airport (IAD)United States

Return flight deals:

Washington Dulles Airport - Thailand

Cabin classes: