DCA - BKK

$485 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 1/20. 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

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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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

Mon, Jan 26 - Sun, Feb 8
ANA Logo
2:00 pm - 6:30 amDCA-BKK
28h 30m2 stops
ANA Logo
10:25 pm - 11:58 amBKK-DCA
25h 33m2 stops
$887ANA
Find Deal
Mon, Jan 26 - Sun, Feb 8
Cathay Pacific Logo
6:15 am - 10:40 amDCA-BKK
40h 25m2 stops
Cathay Pacific Logo
4:55 pm - 10:47 pmBKK-DCA
41h 52m2 stops
$888Cathay Pacific
Find Deal
Tue, Jan 6 - Tue, Feb 24
Delta Logo
6:00 am - 12:45 amDCA-BKK
30h 45m2 stops
Delta Logo
12:55 am - 11:59 amBKK-DCA
23h 04m2 stops
$929Delta
Find Deal
Wed, Jan 7 - Tue, Jan 20
United Airlines Logo
12:00 pm - 11:25 amDCA-BKK
35h 25m3 stops
United Airlines Logo
9:10 am - 1:49 pmBKK-DCA
40h 39m3 stops
$933United Airlines
Find Deal
Thu, Jan 8 - Sun, Feb 15
Korean Air Logo
8:20 am - 12:45 amDCA-BKK
28h 25m2 stops
Korean Air Logo
9:30 pm - 1:25 pmBKK-DCA
27h 55m2 stops
$934Korean Air
Find Deal
Wed, Jan 7 - Mon, Jan 19
United Airlines Logo
12:00 pm - 11:25 amDCA-BKK
35h 25m3 stops
United Airlines Logo
7:10 am - 8:59 pmBKK-DCA
25h 49m2 stops
$936United Airlines
Find Deal
Tue, Jan 6 - Tue, Feb 17
Delta Logo
6:00 am - 12:45 amDCA-BKK
30h 45m2 stops
Delta Logo
9:40 am - 11:20 pmBKK-DCA
25h 40m2 stops
$954Delta
Find Deal
Mon, Jan 5 - Tue, Feb 17
Korean Air Logo
8:20 am - 12:45 amDCA-BKK
28h 25m2 stops
Korean Air Logo
12:55 am - 1:25 pmBKK-DCA
24h 30m2 stops
$959Korean Air
Find Deal
Wed, Feb 4 - Thu, Feb 19
Singapore Airlines Logo
9:30 am - 8:30 amDCA-BKK
35h 00m2 stops
Singapore Airlines Logo
9:10 pm - 9:55 pmBKK-DCA
36h 45m2 stops
$971Singapore Airlines
Find Deal
Sat, Nov 1 - Wed, Nov 12
Singapore Airlines Logo
5:00 pm - 8:00 pmDCA-BKK
40h 00m2 stops
Singapore Airlines Logo
8:00 pm - 9:59 pmBKK-DCA
37h 59m2 stops
$980Singapore Airlines
Find Deal

Everything you should know

Top airlines
ANA
Cheapest • from $887 (round-trip)
Korean Air
Best reviews • 8.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
October
Cheapest • 19% price drop
January
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$887
Typical prices: $1,342-1543
ANA
Mon 1/26Sun 2/8
DCA - BKK • 2 stops
Cheapest one-way
$485
Typical prices: $790-986
Multiple Airlines
Tue 1/20
DCA - BKK • 2 stops
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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.

How much is a round-trip flight from Washington, D.C. Reagan-National Airport to Bangkok Suvarnabhumi Airport?

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 October, where tickets cost $1,140 (return) on average. On the other hand, the most expensive months are April and December, where the average cost of round-trip tickets is $1,783 and $1,706 respectively.

Good to know

Low seasonFebruary
Cheapest flight$485
Best time to beat the crowds but there is an average 16% increase in price.
Most popular time to fly and prices are also 15% 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 $485 for a one-way ticket and $887 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?

    oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between Reagan Washington National Airport and Bangkok, with SkyTeam 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 $1,489 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 4 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 1143 reviews
8.5Boarding
8.1Food
8.3Comfort
8.2Entertainment
8.7Crew
Airline reviews

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.

8.0 ExcellentMatt, Aug 2025ATL - EWR
Read more Korean Air reviews

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.

The delay in Korea was a pain and set us back a day. I have to give big props to Korean Air for setting up a hotel with dinner and transportation to and from the hotel. I also needed assistance with a wheelchair and they did an outstanding job.

Great except for the delay in Korea. Korean Air did a great job setting up a hotel for the night. I also needed assistance with a wheelchair and they were outstanding.

Cramped seating for me. Luckily it wasn’t a long flight

Lounge in Lagos is terrible, food on board from Lagos to Atlanta was horrible. Only bright spot the cabin crew were awesome.

The airport was reasonably clean. The boarding process reasonably efficient. The cabin crew was efficient, polite but not that friendly. The food quality was unremarkable and the choices were awful . There was either a so so chicken dish or a “ vegetarian “ option which was really cheap carbohydrates drowned in cheese. Signing onto i flight wifi was not straightforward. Overall it was a very average experience

The staff and the boarding procedure were all amazing . The one flight was not equipped with WIFI which now adays seems odd. All in all the experience was good

Passengers need to check in big baggage instead of bringing on the plane. That cause inconvenience for everyone. Otherwise flight was good.

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

The food was terrible especially for a 15 hour international flight. The crew was unpleasant as well.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

Quick check in. Everything went smooth. I don't know what can be done about airline food.

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.

Boarding at the airport was not well managed. Otherwise, had a good flight sitting in the first row (which I paid for). Crew was pretty friendly, and flight was smooth.

I was only given 2 meals, and my screen showed that there were 3 meals. Second meal was 1-2 hours late according to the screen.

Just want to do a little more clean up so does not smell like urine.

Cabin crew is very helpful and nice, it is another level of service compared to Air Canada

Better. I took an aisle seat this time. Although the overheard compartment above the seat ahead of me kept opening up during flight.

If I had blood clots, that window seat would've killed me for certain.

Flight was delayed at the last minute for six hours. Instead of delaying it to a normal hour, they moved it to 10 pm to essentially make it a redeye. There was no compensation or benefit offered for this inconvenience. Once on the plane, Inpaid for WiFi twice with both times it not working because of a “weak WiFi signal”, according to the flight attendants. They also chose the farther possible gates in both airports from the entrance/exit, even though they were one of the few active flights left so late in the evening. Overall it was pretty horrible.

I've stomach problems after 2 hours of flight, Iris, the flight purser not only did her best to make me feel comfortable, she went above and beyond providing pain relievers medicines and ointment. She look and found a doctor passenger on the flight to provide advise. She even report on ground staffs about my condition and provide wheelchair upon arrival. Kudos to her and Cathay Pacific!

Everything was fine and I have no complaints or things to note.

Didn’t realize I purchased a basic fare with no carry ons allowed. Not very well communicated. Also had seats switched without knowledge and had to pay for different ones.

We loved our Air Canada experience and will definitely fly them again. It just so happened than in the first leg of our trip their entertainment system was not working, and neither was their oven so cold meal & snacks only.

For the price, it was a really good experience. There was no entertainment on board, so I couldn't really rate this, and I didn't order a meal. I appreciated that there was a free glass of wine.

Short flight. Everything was fine except the flight was delayed twice for a total of an hour.

My flight from New York to Canada and Canada to Brisbane was canceled, so I had to take united airlines instead flight from New York to Dubai then layover in Dubai 8 hours then from Dubai to Brisbane it was extremely difficult for me , it was a nightmare flying with Canadian airlines unfortunately.

I found the boarding easy and my seat was very comfortable as I had a lot of leg room. I am not too happy that I no longer have lounge access even though I used to get it with my TD credit card.

Flight cancelled. Major disruption to our travel. Do not use Air Canada from KC. To few flights.

Real smooth and easy, Real good leg room in coach!

There labor disputes cancelled my flight less than 24 hours before my boarding time but there customer service/website was easy enough to navigate and they rebooked me for no upcharge.

Re luggage I carried a backpack only. I did not check any bags in. However there were other passengers with carry on luggage going in the plane. My question is why are others allowed to have a carry on luggage inside the plane? Shouldn’t they have dropped it off at the gate? I’m asking because I could have brought the same thing instead of a backpack only. Please clarify for future reference. Thank you.

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