$579 Find Cheap Flights from Thailand to Washington Dulles Airport

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 2/5. 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 Washington, D.C. Dulles Intl Airport

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

Cheapest round-trip
$971
Typical prices: $1,134-$1,686
Multiple Airlines
Wed 12/24Wed 12/31
BKK - IAD • 1 stop
Cheapest one-way
$579
Typical prices: $718-$2,209
Multiple Airlines
Thu 2/5
CNX - IAD • 3 stops
When to travel
July
Cheapest • 13% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Thailand to Dulles Intl

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Thailand to Dulles Intl 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 round-trip flight deals from Thailand to Dulles Intl

Wed, Dec 24 - Wed, Dec 31
Multiple Airlines Logo
5:50 am - 11:45 am
BKK
-
IAD
41h 55m1 stop
Multiple Airlines Logo
2:35 pm - 6:00 pm
IAD
-
BKK
39h 25m1 stop
$971Multiple Airlines
Wed, Apr 22 - Tue, Apr 28
STARLUX Airlines Logo
1:10 pm - 5:49 am
BKK
-
IAD
27h 39m2 stops
STARLUX Airlines Logo
7:01 pm - 4:40 pm
IAD
-
BKK
34h 39m2 stops
$1,010STARLUX Airlines
Fri, Apr 3 - Sat, Apr 18
SAUDIA Logo
3:25 pm - 3:45 pm
BKK
-
IAD
35h 20m1 stop
SAUDIA Logo
6:50 pm - 1:45 pm
IAD
-
BKK
31h 55m1 stop
$1,012SAUDIA
Wed, Apr 22 - Tue, Apr 28
Multiple Airlines Logo
1:25 pm - 4:37 pm
BKK
-
IAD
38h 12m2 stops
Multiple Airlines Logo
3:35 pm - 6:15 pm
IAD
-
BKK
39h 40m1 stop
$1,016Multiple Airlines
Sun, Feb 8 - Sun, Feb 15
Multiple Airlines Logo
10:50 am - 9:05 am
BKK
-
IAD
34h 15m2 stops
Multiple Airlines Logo
2:35 pm - 11:25 pm
IAD
-
BKK
20h 50m1 stop
$1,024Multiple Airlines
Thu, Apr 23 - Tue, Apr 28
Multiple Airlines Logo
5:30 pm - 3:05 pm
BKK
-
IAD
56h 35m2 stops
Multiple Airlines Logo
7:01 pm - 12:10 pm
IAD
-
BKK
30h 09m2 stops
$1,029Multiple Airlines
Sun, Jan 25 - Sun, Feb 1
United Airlines Logo
9:10 am - 9:10 am
BKK
-
IAD
36h 00m1 stop
United Airlines Logo
8:20 am - 12:20 am
IAD
-
BKK
28h 00m2 stops
$1,046United Airlines
Wed, Apr 1 - Sun, Apr 5
Emirates Logo
1:00 pm - 8:40 am
UTP
-
IAD
30h 40m2 stops
Emirates Logo
10:55 am - 4:50 pm
IAD
-
UTP
42h 55m2 stops
$1,675Emirates
Wed, Apr 1 - Sun, Apr 5
Emirates Logo
1:00 pm - 8:40 am
UTP
-
IAD
30h 40m2 stops
Emirates Logo
10:55 am - 4:50 pm
IAD
-
UTP
42h 55m2 stops
$1,677Emirates
Fri, Jan 23 - Sat, Jan 31
Korean Air Logo
12:15 am - 9:50 am
CNX
-
IAD
21h 35m1 stop
Korean Air Logo
11:50 am - 10:55 pm
IAD
-
CNX
23h 05m1 stop
$2,038Korean Air
Booking Insights

KAYAK's insights & trends for flights to Dulles Intl

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 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 July, where tickets cost $1,029 on average for one-way flights. On the other hand, the most expensive months are January and October, where the average cost of tickets from Thailand is $1,357 and $1,331 respectively. For return trips, the best month to travel is July with an average price of $1,029.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip 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 week.

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 80 days before departure.

Good to know

Low seasonNovember
Cheapest flight$579
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly and prices are also 14% lower on average.
Flight from Chiang Mai to Washington Dulles Airport

FAQs - booking Washington Dulles Airport flights

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

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

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

    Based on KAYAK data, the cheapest day to fly to Washington, D.C. is Thursday where tickets can be as cheap as $533. On the other hand, the most expensive day to fly is Saturday, where prices are $1,136 on average.

  • 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.

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

    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 $1,234.

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

    Each week there are around 2,735 direct flights from within Thailand to Washington, D.C. Dulles Intl Airport. The most common day for departures is Friday, with 15% of flights taking off on this day.

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.

Reviews of the top 5 airlines serving from Thailand to Dulles Intl

 
See real verified KAYAK customer reviews for airlines flying to Washington, D.C.. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Thailand to Washington, D.C.. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
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 1184 reviews
8.5Boarding
8.3Comfort
8.7Crew
8.2Entertainment
8.1Food
Airline reviews

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

10.0 ExcellentAnonymous, Nov 2025
ICN - SFO
Read more Korean Air reviews

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

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

Korean are so racist and when I ask question or directions they totally ignore me and say racist. Also they give me an rude attitude.

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.

This was an amazing flight. The crew was great. The service was great. The food provided was great.

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.

Staff was rude and loud. No respect for customers unlike the Starflyer Osaka to Haneda sector where service was outstanding. What a stark difference. Maybe United should learn from ANA how to do customer service.

The meals were sufficient and tasty considering it was air travel food. Water coffee and juices offered each time a meal came by and water distributed between meals. It was good service in my opinion. Plenty of movies to enjoy. May not be the one you want but plenty of older movies and plenty of current ones as well. I enjoyed the trip.

we were in premium economy, but we both got middle seats and had to sit separately. i could have avoided this by trying to obtain seats sooner, but i tried 3 times and gave up. ANA's technology is not friendly for newcomers. no, check that---I think it is nigh impossible. not sure we are coming back. ana can do better to provide a front end that's friendly to users in both US and Japan.

Checking in via an alliance partner, even a foreign one should get TSA Precheck printed on your boarding pass. The paper copy issued by ANA didn’t show it. I couldn’t get my digital copy due to some technical issue arising because I checked in with ANA. The kiosks at SFO similarly threw an error. The only way I could have gotten a new copy of my boarding pass was from the UA counter and lines were nearly as long as TSA so I bit the bullet and went through the regular TSA line. If UA wants my business, they need to improve that process.

Great as can be expected with a 10 hour flight over the Pacific. Great movie selection of new releases that hadn’t hit streaming yet. And despite the bad rep, I actually like the airplane good.

One of the best business class seats I’ve had. The lie flat seats made it comfortable to endure a 12 hour flight. Service was excellent and food was great.

Almost 6 hours of delay with over 12 gate changes. Flight was supposed to depart around 6 and instead depart after 12am. No accommodations were offered than some snacks closer to midnight when the crew was planning to throw away some snacks.

Purchased WiFi was slow to non functional. Staff was not personable or friendly. Seats were cramped. Boarding took long but I expected that.

The crew was excellent. The flight was delayed for 20 to 25 minutes. We did arrive a bit later than expected. The AC could have been better.

Very disappointed with the seat selection. During the booking, I selected seats such that my wife and I would sit next to each other. However, during check-in, we found out that the airline changed our seats and we were seated apart; and I was stuck in the middle seat with two strangers. Very disappointing experience. We would not fly ANA next time.

Sadly I couldn't get the food I requested as it was out. Also, if you don't want to be woken up make sure the crew knows it. My wife was woken on every service.

Three meals on a single flight is disgusting. Even if I reject them all, sleeping is impossible and all that food (especially wasted food) is just antithetical to a pleasant flight experience. People were chucking multiple abandoned trays on the floor in front of my seat.

Similar to Hyd->Dubai this too was worst airlines. Bad seats, bad seating arrangement which created lot of confusion since family member were not given seat together. However most of them changed the seat and got with the family. Cheap tactics by Emirates.

The best ever, friendly and attentive cabin crew, amazing captains who utilised their expertise for less turbulence, just overall amazing

Overall I was quite pleased with the experience; the cleanliness; the polite and attentiveness of the cabin crew; and the delicious food options.

I would never have been able to make the transfer in time without asking for a wheelchair

Good food, real silverware, polite staff, smooth landing, charging plugs, good entertainment options.

Loved that I had an exit row seat, and there was no one else in the row! And again, I don' use on-line entertainment at all (I read or sleep) but I very much appreciate that I didn't hear anyone else's entertainment!

The entire crew was amazing. They went out of their way to make us enjoy a great travel experience.

Loved everything! This flight had premium economy and I didn't see an option to upgraded to premium economy OR buy premium economy tickets. How come?

Paid $10 for wifi for full flight duration and the wifi wasn’t available after initial 2 hours

My baggage is lost. Flight cancelled, Rebooked ticket through long routes. Mental stress, emotional hurt

The flight overall was good. The attendants did a good job except that 1 female had too much fragrance on. The other things that made the flight unpleasant were out of the airlines control.

Nothing to complain. The staff and flight was good especially the seats which was better compared than the cloth ones on Qatar airways

I would love the entertainment center to be updated with more content. The flight to Doha had more options than the one to Miami

Overall the experience was neat with crew being nice and caring especially to parent with kids. The free snacks option was okay. The kiosk at Philly airport didn’t work.

First keep the airline as you promise. Reason for travelling from Orlando to Tampa is to go with Qatar Airline. We end up with American Airline. As expected the service was horrible.

Not sure how we end up with American Airlines instead of Qatar Airways. From Philadelphia to Qatar they boarded us then they asked us to unload. After 30 minutes later they board us again. The inside the plane it was burning hot and we were sweating like crazy. Crew members are absolute rude. The way they served the passengers were horrible. One of the crew members hit my knee with food cart and kept going. I was holding an ice pack for almost 2 hours. I am still with the pain.

I felt that when I was rerouted it should have been to business class.

The flight was smooth Thank God but the delays and changing gates for 3-4 times made me so tired of walking back and forth with heavy bags I thought I was going to pass out with heavy headaches but Thank God finally found the final gate and home safe. These delays happen anytime for important reasons so just be patient when you come across these situations.

The food is terrible. The same pasta or chicken with bad taste and presentation

It was probably one of the worst flights I’ve been on. The restrooms were never cleaned or stocked. The food was very subpar, and i usually enjoy airline food, so I was disappointed. It was just all around a bad experience. The only saving grace was the flight attendants.

The only downside was my cell phone charger wouldn’t work in the charging port but everyone else’s would work in them all. My cell phone cable works fine in my hotel room in Frankfurt.

Great crew, excellent landing, good food. Over all great experience. Thank you!

One bag is incorrect and not acceptable for an international flight. The food was not just good. I won't fly with them again.

Not pleasant trip cross country when the entertainment and WiFi system not working. No entertainment for entirety of route. Staff was rather nonchalant in that they dismissed the problem due to age of plane. It would have been nice to know this up front so I could have come prepared to read or download movies before boarding Coincidentally or not, there was a similar issue with the entertainment system on my previous flight I took on my fist leg of the trip. There are no seat TVs, so you must rely on the app when it works. United can do better. Also, what use it it to pay for boarding group 2 when half of the passengers are in the same line as you?

Crew was dismissive. Snacks and refills not offered. Poor business class experience. Bed not comfortable compared to Emirates or BA.

Flight was delayed for 5 hours because crew didn’t have enough time to rest - this seems like it could have been avoided with better scheduling. Food was not good.

IAD with the archaic people movers is just a place to be avoided.

Overall, it was good. I was seating next to a wonderful lady and did not notice how time flew. Thanks

Traveling to a place near Dulles Intl?

Book flights to Dulles Intl if you plan to visit one of these locations
Winchester
Linthicum Heights
Hanover
Springfield
Gaithersburg
Towson
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Oxon Hill
Owings Mills
Charles Town
Glen Burnie
Greenbelt
Ellicott City
Edgewood
Colonial Beach
Pikesville
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Lutherville Timonium
Camp Springs
Stevensville

Everything you need to know for your flight to Dulles Intl

Information on the airport you'll fly into in Washington, D.C.