DCA - BKK

$461 Find Cheap Flights from Reagan Washington National Airport to Bangkok

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Reagan-National to Bangkok departing on 3/18. 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 Suvarnabhumi Airport

 
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 round-trip
$901
Overall average: $1,042
Korean Air
Sun 1/18Sun 2/1
DCA - BKK • 2 stops
Cheapest one-way
$461
Air India
Wed 3/18
DCA - BKK • 2 stops
When to travel
February
Cheapest • 25% price drop
January
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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We hope you love your trip to Bangkok!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Reagan-National to Bangkok (DCA-BKK)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Reagan-National 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 round-trip flight deals from Reagan-National to Bangkok

Sun, Jan 18 - Sun, Feb 1
Korean Air Logo
5:00 pm - 12:45 am
DCA
-
BKK
43h 45m2 stops
Korean Air Logo
2:05 am - 1:53 pm
BKK
-
DCA
47h 48m2 stops
$901Korean Air
Sun, Jan 18 - Mon, Feb 2
Korean Air Logo
5:00 pm - 12:45 am
DCA
-
BKK
43h 45m2 stops
Korean Air Logo
9:40 am - 4:29 pm
BKK
-
DCA
42h 49m2 stops
$924Korean Air
Tue, Mar 10 - Tue, Mar 24
Delta Logo
9:40 am - 11:20 pm
DCA
-
BKK
26h 40m2 stops
Delta Logo
2:05 am - 10:42 pm
BKK
-
DCA
31h 37m2 stops
$928Delta
Mon, Feb 2 - Mon, Feb 16
Korean Air Logo
6:00 am - 12:55 am
DCA
-
BKK
30h 55m2 stops
Korean Air Logo
2:05 am - 1:50 pm
BKK
-
DCA
47h 45m2 stops
$933Korean Air
Sun, Jan 18 - Wed, Mar 11
Delta Logo
7:43 pm - 12:45 am
DCA
-
BKK
41h 02m2 stops
Delta Logo
12:55 am - 10:42 pm
BKK
-
DCA
32h 47m2 stops
$934Delta
Tue, Apr 7 - Wed, Apr 22
United Airlines Logo
11:30 am - 4:35 am
DCA
-
BKK
30h 05m2 stops
United Airlines Logo
7:00 am - 11:59 pm
BKK
-
DCA
27h 59m2 stops
$936United Airlines
Tue, Jan 13 - Thu, Jan 22
China Airlines Logo
5:01 pm - 1:05 pm
DCA
-
BKK
32h 04m2 stops
China Airlines Logo
2:35 am - 8:00 pm
BKK
-
DCA
53h 25m2 stops
$937China Airlines
Sun, Feb 1 - Sun, Feb 15
Korean Air Logo
5:00 pm - 12:55 am
DCA
-
BKK
43h 55m2 stops
Korean Air Logo
2:05 am - 1:50 pm
BKK
-
DCA
47h 45m2 stops
$939Korean Air
Thu, Jan 15 - Thu, Mar 12
United Airlines Logo
10:30 am - 11:25 am
DCA
-
BKK
36h 55m3 stops
United Airlines Logo
7:10 am - 9:45 pm
BKK
-
DCA
25h 35m2 stops
$940United Airlines
Mon, Jan 12 - Thu, Mar 12
United Airlines Logo
5:59 pm - 11:25 am
DCA
-
BKK
29h 26m2 stops
United Airlines Logo
7:10 am - 9:45 pm
BKK
-
DCA
25h 35m2 stops
$944United Airlines
Booking Insights

KAYAK's insights & trends for Reagan-National to Bangkok flights

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

What’s the cheapest day of the week to fly from Reagan Washington National Airport to Bangkok?

The average price of all round-trip flights from Washington, D.C. Reagan-National Airport to Bangkok Suvarnabhumi Airport clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Bangkok on a Tuesday and more expensive on a Sunday. On your return trip to Reagan Washington National Airport, you should consider flying back on a Monday, and avoid Wednesdays for better deals.

What is the cheapest month to fly from Washington, D.C. Reagan-National Airport to Bangkok Suvarnabhumi Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. Reagan-National Airport to Bangkok Suvarnabhumi 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 from Washington, D.C. Reagan-National Airport to Bangkok Suvarnabhumi Airport is February, where tickets cost $977 (return) on average. On the other hand, the most expensive months are April and June, where the average cost of round-trip tickets is $1,761 and $1,660 respectively.

Good to know

Low seasonFebruary
Cheapest flight$461
Best time to beat the crowds with an average 26% drop in price.
Most popular time to fly and prices are also 21% lower on average.
Flight from Reagan Washington National Airport to Bangkok

When to book flights from Reagan-National to Bangkok

Are your dates flexible? Find out the best times to travel from Reagan-National to Bangkok based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips 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 Reagan Washington National Airport to Bangkok flights

  • What is the cheapest flight from Washington, D.C. Reagan-National Airport to Bangkok Suvarnabhumi Airport?

    In the last 3 days, the lowest price for a flight from Washington, D.C. Reagan-National Airport to Bangkok Suvarnabhumi Airport was $461 for a one-way ticket and $901 for a round-trip.

  • Do I need a passport to fly between Reagan Washington National Airport and Bangkok?

    A passport is required to fly from Reagan Washington National Airport to Bangkok.

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

    Reagan Washington National Airport and Bangkok are both served by 1 main airport. You will leave Reagan Washington National Airport from Washington, D.C. Reagan-National and will be arriving at Bangkok Suvarnabhumi.

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

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

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

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

  • Which is the best airline for flights from Washington, D.C. to Bangkok, Korean Air or Delta?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Bangkok are Korean Air and Delta. With an average price for the route of $953 and an overall rating of 8.4, Korean Air is the most popular choice. Delta is also a great choice for the route, with an average price of $1,042 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Reagan Washington National 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 Reagan Washington National Airport to Bangkok.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Bangkok from Reagan Washington National 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 from Reagan Washington National Airport to Bangkok?

    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 Bangkok with an airline and back to Reagan Washington National Airport with another airline. Booking your flights between Reagan Washington National Airport and BKK can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Reagan Washington National 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 Reagan Washington National Airport 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 serving from Reagan-National 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 Reagan-National 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 1184 reviews
8.1Food
8.7Crew
8.5Boarding
8.2Entertainment
8.3Comfort
Airline reviews

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

10.0 ExcellentVivian, Nov 2025
SEA - ICN
Read more Korean Air reviews

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

Not many people, so you can lay down on two seats

They did an excellent job helping me with a wheelchair. I couldn’t have asked for any better help.

Lady Pilot was perfect in every way wheels up to wheels down communication, professionalism, excellent on time departure and on time arrival, excellent communication! Fantastic job with Superb attitude!!

The food is terrible. The staff is wonderful. Comfort is good.

Left on time, a bit delayed due to headwinds most of the trip.

I fly Delta all the time, have Platinum Medallion status. But this route seems to have major problems with delays and seems to never leave on time! Have only taken it twice in the last two weeks, and each time it had delays of more than 1 hour... very disappointed!!!!

Getting to the flight was arduous and lengthy. The flight itself was good but the food option wasn’t a good selection. I need to do a Kosher option on my return. Flight crew were nice

Good seats in Main cabin, excellent service and excellent landing

My flight was cancelled with no explanation after I had already cleared security. I was given 4 options to rebook, only one being non-stop like I had paid for. I grabbed it. It was 4 plus hours later and then took off even later. Biggest complaint is that I booked early and had an aisle seat. They gave me a "window" seat in front of the exit row, so the seat did not decline. I weigh all of 103 #s and it was tight for me! For what I paid, I feel I was kind of ripped off. I think they should have given me the empty comfort seat for the inconvenience. There was no apology nor any explanation as to why the flight was cancelled. My guess is it benefitted Delta in some way.

Very smooth, on-time, and pleasantly uneventful flight. The team at the gate and on board were professional and genuinely courteous. The pilot kept us well updated throughout, and both takeoff and landing were steady and enjoyable without any drama. Just a good, solid flight. Thank you! 💗

Staff was exceptional! Everyone was kind, professional and friendly making the trip very pleasant. Thank you!

No lunch on a x-country flight scheduled for 10:50 am departure, arrived 5+ hrs later. That requires a black box label before you pay for the tickets. Worst, when I checked in online, it's specifically said that lunch was served on his flight for economy Plus passengers.

My flight was suppose to be at 7:45pm to fly but it didnt fly out until 8:55 to dallas so then all of my other flights was late and delay ihad to wait at the airport for extra 14 hours to be able to get on a different plane

There were delays at boarding and landing. These events resulted in a tight transfer time in HK. Poor signage for transfers. Finally, lost luggage at final destination.

It was good. The planes needed to be updated though, they were dated and the entertainment systems were old. Service was amazing. The pre-booked meals were lacklustre.

Super delayed. Unnecessary. Need more competent people doing logistics to keep things moving on time. Totally unacceptable.

Flew from lax economy on cathay 777. Seat configuration 3-4-3. When the forward seat reclines it feels like someone is leaning forward and staring you. If you are slightly big tray tables will touch your abdomen even with seats upright. AVOID this above 777 configuration at all cost for a long flight. However their Airbus 350 3-3-3 configuration felt spacious and Seats wider.

Leg room wasn't that great. Other than that it was a good flight

Issues: 1) the charging issue as described in my previous survey 2) when I requested diet coke during the breakfast time, it is not available. Why? I can't drink diet coke in the morning? 3) when I tried to transfer to this flight, its gate information was not available to me?

Chicken pieces were too big with pasta. Need to be smaller.

Seats in the absolute back row of the plane even though we booked ages ago :( Crew was awesome though

My connecting flight was canceled or never existed. My stopover went from 1 hour and a half to 10 hours. It was a long day that I wasn't prepared for and it would have been nice to know that ahead of time. Cathay is great though. Great staff, entertainment and food.

Not great experience - we were super late boarding due to issues with aircraft. Then when we finally all got onboard and seated and they started taxiing out to the runway they just stopped then turned around and went back to the airport. Apparently the crew “ran out of time” to legally fly us. They mentioned that they were about 2 minutes away from taking off. I understand the rules and safety but kinda wonder why they would have bothered boarding us in the first place? Had to go all the way back and de plane and then wait in a HUGE line to get a hotel (this is somewhere around 2:30am) finally got to hotel by Uber (no shuttle after 20min so gave up) and they ended up putting us all back on the same aircraft at 10am next morning so got about 2.5 hours sleep. They did give us. $250 credit, but it was a São Paulo Brazil flight out of Dulles. The flight and everything was fine.

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

7 hours delayed due to operational issues on United’s end. Basically laziness.

Short flight but an "eager to help" crew made the journey more enjoyable!

During booking, I kept trying submitting my payment from the Mexican website and it didn't work. After I had the idea to change it to the Canadian website, it worked but I had to be charged the equivalent of 50 CAD more. I received the clear instruction that I would only be able to check-in at the airport and that it was impossible to select a seat 24 hours before departure, that I had to pay 144 CAD to do so, although not only was I able to check-in 24 hours before departure, but I could have selected my seats for free then. All in all, I almost threw $200 out the window due to misleading information. Besides, the app kept crashing, the information to get to the gate on the app was inaccurate, my gate was switched and I was only informed once in the air (luckily I had noticed the departure pannel), I was not addressed in my language beforehand and even if I tried I was immediately answered in English (which meant the crew understood but didn't want to answer accordingly), there was only one snack & beverage service on my medium haul flight and no beverage service on my short haul flight. To be fair, the planes were comfortable, the crew apart from the language issue was helpful, dynamic and engaging, the plane was clean and the directions were clear and direct. United has a lot of potential to be one of my favourite airlines, but the devil is in the details and a lot of them missed the target.

Better WiFi. I cannot understand that in 2025, United is so behind on a technology that is now a necessity and still painfully unreliable, slow and keeps disconnecting.

Great service on board. Boarding a bit slow due to process. Food was pretty average.

Very small cramped plane for an international flight. Everything else was good, but it was maybe the smallest comfort-wise I've ever been on for longer than 3-4 hours and the trip was 7.5

Flight was delayed 3 hours. No food and drink vouchers was provided. They offered a mini pretzel bag and water .

Staff was rude. Didn’t give water for 2 hours. Worst service

It was just fine. I managed to make all my connection too sbut had trouble in Munich with no wheel chair and trouble trying to get help from the airport people to get to the other terminal for my flight. Finally a wonderful lady Amelia, helped me to make my flight connection Timon with zero time to spare.

Over 40 years ago my AC return flight was canceled, during this last summer the same thing happened. AC denied everything Canadian like paying for accommodations and basic necessities. So why would I ever want to fly AC again? This last flight my wife took the return flight had problems and left late, so I guess they are getting better. However I have no faith in this airline so I drove to this last destination! I'll never fly AC again!!!

Great check in process in LA and good service The check in process as well as at the gate is way better in the US versus canada 🇨🇦

Super experience. Earlier than schedule departure and arrival. Baggage handling was very good

Allow me to book extra bag check in as free though I packed in 1 luggage but that was 7 LBS overweight so make another bag to free check in.

I would like to get my money back. I flight was 4 hours late on the way to detroit, And same on my way back to Brussels they cancelled my flight and give me an other ticket and i had to wait 5 hours.

All attendents were very efficient, pleasant and happy. Everything went smoothly. The seats could have been wider. There could have been more free food instead of just one small bar.

My seat was one of those that couldn't recline, but the problem was that it was abnormally upright, so the headrest actually made the seat concave, which was uncomfortable and hard on my lower back. I had to ball my jacket up and use it as lumbar support. goodness I had it with me.

Boarding was so so after zone 3 was called all other zones went in

I liked a lot , the flight attendant so nice ,the seat very comfortable I enjoyed the flight , I will do it again with Air Canada,

Everything you need to know for your flight from Reagan-National to Bangkok

Information on your arrival and departure airports