DCA - BKK

$473 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 1/31. 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
$899
Overall average: $1,050
Singapore Airlines
Mon 1/12Tue 1/27
DCA - BKK • 2 stops
Cheapest one-way
$473
Typical prices: $772-$910
Multiple Airlines
Sat 1/31
DCA - BKK • 2 stops
Top airlines
Singapore Airlines
Cheapest • from $899 (round-trip)
Korean Air
Best reviews • 8.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
January
Cheapest • 24% 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

Mon, Jan 12 - Tue, Jan 27
Singapore Airlines Logo
5:01 pm - 8:00 pmDCA-BKK
38h 59m2 stops
Singapore Airlines Logo
12:00 pm - 8:00 pmBKK-DCA
44h 00m2 stops
$899Singapore Airlines
Find Deal
Sun, Feb 1 - Wed, Feb 25
Singapore Airlines Logo
9:59 am - 8:25 amDCA-BKK
34h 26m2 stops
Singapore Airlines Logo
9:10 pm - 9:55 pmBKK-DCA
36h 45m2 stops
$919Singapore Airlines
Find Deal
Sun, Feb 8 - Wed, Feb 18
ANA Logo
2:00 pm - 5:10 amDCA-BKK
27h 10m2 stops
ANA Logo
10:25 pm - 1:07 pmBKK-DCA
26h 42m2 stops
$923ANA
Find Deal
Mon, Nov 17 - Tue, Dec 9
Delta Logo
6:10 am - 12:45 amDCA-BKK
30h 35m2 stops
Delta Logo
12:55 am - 11:37 amBKK-DCA
22h 42m2 stops
$928Delta
Find Deal
Tue, Jan 13 - Wed, Feb 4
Korean Air Logo
6:00 am - 12:55 amDCA-BKK
30h 55m2 stops
Korean Air Logo
9:30 pm - 1:53 pmBKK-DCA
28h 23m2 stops
$932Korean Air
Find Deal
Wed, Nov 19 - Mon, Dec 8
Korean Air Logo
6:59 am - 11:20 pmDCA-BKK
28h 21m2 stops
Korean Air Logo
12:55 am - 5:59 pmBKK-DCA
29h 04m2 stops
$933Korean Air
Find Deal
Mon, Nov 24 - Thu, Dec 25
Delta Logo
7:40 am - 12:55 amDCA-BKK
29h 15m2 stops
Delta Logo
9:40 am - 10:01 pmBKK-DCA
24h 21m2 stops
$953Delta
Find Deal
Thu, Nov 27 - Wed, Dec 10
ANA Logo
12:00 pm - 5:10 amDCA-BKK
29h 10m2 stops
ANA Logo
10:25 pm - 11:58 amBKK-DCA
25h 33m2 stops
$970ANA
Find Deal
Thu, Nov 6 - Tue, Nov 11
Cathay Pacific Logo
9:45 am - 10:40 amDCA-BKK
36h 55m2 stops
Cathay Pacific Logo
4:55 pm - 3:55 pmBKK-DCA
35h 00m2 stops
$1,014Cathay Pacific
Find Deal
Sun, Nov 16 - Thu, Dec 4
Cathay Pacific Logo
7:59 pm - 12:15 amDCA-BKK
40h 16m2 stops
Cathay Pacific Logo
7:55 am - 8:44 pmBKK-DCA
24h 49m2 stops
$1,020Cathay Pacific
Find Deal
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 January, where tickets cost $1,050 (return) on average. On the other hand, the most expensive months are April and June, where the average cost of round-trip tickets is $1,783 and $1,660 respectively.

Good to know

Low seasonFebruary
Cheapest flight$473
Best time to beat the crowds but there is an average 18% increase in price.
Most popular time to fly and prices are also 25% 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 $473 for a one-way ticket and $899 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 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 1153 reviews
8.1Food
8.2Entertainment
8.5Boarding
8.3Comfort
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.

They ended up paying for the bag twice, but the counter wouldn't take my baggage receipt. Left it to me to resolve. Not sure how to resolve the issue.

The customer service before board was very rude and when I expressed my concerns about making the connecting flight she laughed and told me I bought the wrong ticket. I explained once it showed the flight was delayed it no longer let me change seats or anything. I was trying to upgrade to make sure I would get to the next gate on time.

Non stop on long haul is the way to go. Great experience

The aircraft interior is old and tired on this aircraft. The entertainment system never worked despite the crews attempt to reset the system.

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

Old plane and old configuration/seats but still comfortable for a morning flight

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

Flight was too crowded and seats are too small, especially since passengrs are getting larger. Having a middle seat is ALWAYS tough! Woman on my left was large & kept creeping in to my space. Flight personnel were great! Have more savory rather than sweet snacks please.

Flight was crowded and the woman sitting on my left was large & kept crouching in to my space. You need bigger seats or smaller passengers to fit into the seats you DO have! Snack were OK. Would appreciate if airlines had more savory rather than sweet snacks, thank you!

Delayed flight (1hour) plus a long layover after an overnight flight with no backup plane available.

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.

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.

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.

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,

Plane left an hour late, I missed my connection and my bow case was never even loaded on the plane in VA. I deal with this type of nonsense everytime I fly air canada.

For goodness sake, board from the back of the plane to the front and assign overhead space. It would fix everything. Seriously.

Elderly female flight attendant was not customer friendly. There were only about 12 people on a regional jet that had about 60 seats. There were 8 exit row seats and none of them were taken. We attempted to sit in those seats and the flight attendant gave the standard " you didn't pay for those" so she would not allow us to move. What harm would that have caused ? They assigned seats to 5 of the 12 people in 2 rows, row 20 and 21. A simple friendly customer experience gesture of allowing us to sit in exit rows would have gone a long way in me having a very favorable impression on Air Canada. After that I have very poor impression of Air Canada and will not fly with them when I can avoid it.

It was a smooth flight both in the sky and landing!

Pearson Airport could not properly handle all the passengers who they needed to process in order to properly get them on board. As a result, I missed the departure of my flight from Toronto. The only saving grace is that Air Canada found a flight that only delayed me by one hour. However, this was no thanks to Pearson Airport!

Almost everything it was a “cool” ambiance but we arrived to Toronto so that it’s ok for me

The crew was really nice. The plane seats were kinda small even for a 5’6” / 158 lbs person.

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

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