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Cheap flights from Washington, D.C. to Bangkok from $459

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to Bangkok departing on 1/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
2:35 pm - 4:20 amIAD-DMK
25h 45m2 stops
Multiple Airlines Logo
1:40 pm - 9:45 amDMK-IAD
31h 05m2 stops
$944Multiple Airlines
Find Deal
Sun, Mar 1 - Sun, May 31
Multiple Airlines Logo
3:35 pm - 4:30 amIAD-DMK
25h 55m2 stops
Multiple Airlines Logo
1:40 pm - 9:45 amDMK-IAD
31h 05m2 stops
$955Multiple Airlines
Find Deal
Mon, Mar 23 - Mon, Mar 30
Multiple Airlines Logo
2:35 pm - 4:20 amIAD-DMK
25h 45m2 stops
Multiple Airlines Logo
1:40 pm - 9:05 amDMK-IAD
31h 25m2 stops
$958Multiple Airlines
Find Deal
Tue, Feb 3 - Wed, Feb 18
Multiple Airlines Logo
2:35 pm - 2:30 amIAD-DMK
23h 55m2 stops
Multiple Airlines Logo
1:40 pm - 9:05 amDMK-IAD
31h 25m2 stops
$967Multiple Airlines
Find Deal
Mon, Feb 2 - Wed, Feb 11
Multiple Airlines Logo
3:35 pm - 4:25 amIAD-DMK
25h 50m2 stops
Multiple Airlines Logo
1:40 pm - 9:45 amDMK-IAD
31h 05m2 stops
$975Multiple Airlines
Find Deal
Sun, Mar 22 - Mon, Mar 30
Multiple Airlines Logo
3:35 pm - 4:30 amIAD-DMK
25h 55m2 stops
Multiple Airlines Logo
1:40 pm - 9:45 amDMK-IAD
31h 05m2 stops
$996Multiple Airlines
Find Deal
Tue, Mar 31 - Mon, May 4
Multiple Airlines Logo
2:35 pm - 4:20 amIAD-DMK
25h 45m2 stops
Multiple Airlines Logo
1:40 pm - 9:05 amDMK-IAD
31h 25m2 stops
$999Multiple Airlines
Find Deal
Wed, Feb 18 - Sun, Feb 22
Multiple Airlines Logo
2:35 pm - 2:30 amIAD-DMK
23h 55m2 stops
Multiple Airlines Logo
1:40 pm - 9:05 amDMK-IAD
31h 25m2 stops
$1,003Multiple Airlines
Find Deal
Tue, Feb 17 - Sun, Feb 22
Multiple Airlines Logo
2:35 pm - 4:20 amIAD-DMK
25h 45m2 stops
Multiple Airlines Logo
1:40 pm - 9:05 amDMK-IAD
31h 25m2 stops
$1,005Multiple Airlines
Find Deal
Sat, Feb 28 - Sun, Mar 8
Multiple Airlines Logo
2:35 pm - 4:25 amIAD-DMK
25h 50m2 stops
Multiple Airlines Logo
1:40 pm - 9:45 amDMK-IAD
31h 05m2 stops
$1,008Multiple Airlines
Find Deal
Tue, Jan 13 - Mon, May 4

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. to Bangkok Don Mueang Intl Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated November 24, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Bangkok Don Mueang Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Bangkok

IAD - DMK

IADDMK

Washington, D.C. Dulles Intl

Sun 3/1

2:35 pm-4:20 am

2 stops25h 45m

Bangkok Don Mueang Intl

Sun 5/31

1:40 pm-9:45 am

2 stops31h 05m

$944

Washington, D.C.Bangkok

IAD - DMK

IADDMK

Washington, D.C. Dulles Intl

Mon 3/23

3:35 pm-4:30 am

2 stops25h 55m

Bangkok Don Mueang Intl

Mon 3/30

1:40 pm-9:45 am

2 stops31h 05m

$955

Washington, D.C.Bangkok

IAD - DMK

IADDMK

Washington, D.C. Dulles Intl

Tue 2/3

2:35 pm-4:20 am

2 stops25h 45m

Bangkok Don Mueang Intl

Wed 2/18

1:40 pm-9:05 am

2 stops31h 25m

$958

Washington, D.C.Bangkok

IAD - DMK

IADDMK

Washington, D.C. Dulles Intl

Mon 2/2

2:35 pm-2:30 am

2 stops23h 55m

Bangkok Don Mueang Intl

Wed 2/11

1:40 pm-9:05 am

2 stops31h 25m

$967

Washington, D.C.Bangkok

IAD - DMK

IADDMK

Washington, D.C. Dulles Intl

Sun 3/22

3:35 pm-4:25 am

2 stops25h 50m

Bangkok Don Mueang Intl

Mon 3/30

1:40 pm-9:45 am

2 stops31h 05m

$975

Washington, D.C.Bangkok

IAD - DMK

IADDMK

Washington, D.C. Dulles Intl

Tue 3/31

3:35 pm-4:30 am

2 stops25h 55m

Bangkok Don Mueang Intl

Mon 5/4

1:40 pm-9:45 am

2 stops31h 05m

$996

Washington, D.C.Bangkok

IAD - DMK

IADDMK

Washington, D.C. Dulles Intl

Wed 2/18

2:35 pm-4:20 am

2 stops25h 45m

Bangkok Don Mueang Intl

Sun 2/22

1:40 pm-9:05 am

2 stops31h 25m

$999

Washington, D.C.Bangkok

IAD - DMK

IADDMK

Washington, D.C. Dulles Intl

Tue 2/17

2:35 pm-2:30 am

2 stops23h 55m

Bangkok Don Mueang Intl

Sun 2/22

1:40 pm-9:05 am

2 stops31h 25m

$1,003

Washington, D.C.Bangkok

IAD - DMK

IADDMK

Washington, D.C. Dulles Intl

Sat 2/28

2:35 pm-4:20 am

2 stops25h 45m

Bangkok Don Mueang Intl

Sun 3/8

1:40 pm-9:05 am

2 stops31h 25m

$1,005

Washington, D.C.Bangkok

IAD - DMK

IADDMK

Washington, D.C. Dulles Intl

Tue 1/13

2:35 pm-4:25 am

2 stops25h 50m

Bangkok Don Mueang Intl

Mon 5/4

1:40 pm-9:45 am

2 stops31h 05m

$1,008

Flights are sorted by cheapest round-trip flights first.

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How to get the cheapest flight ticket from Washington, D.C. to Bangkok Don Mueang Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Bangkok Don Mueang Intl Airport?

The cheapest day to depart from Washington, D.C. to Bangkok Don Mueang Intl Airport is on a Tuesday. Travelers who choose to depart for Bangkok Don Mueang Intl Airport on a Tuesday will often find tickets for as low as $1,118. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $1,549. These prices are subject to change though, so be sure to set up a Price Alert for flights to Bangkok Don Mueang Intl Airport.

What is the cheapest time of day to depart on your flight to Bangkok Don Mueang Intl Airport?

Flying to Bangkok Don Mueang Intl Airport from Washington, D.C. in the morning is the least expensive time of day to depart. momondo users have found prices as low as $1,412 when looking at flights departing in the morning. Flights at noon are often more expensive with an average ticket price of $1,577.

When to book flights from Washington, D.C. to Bangkok Don Mueang Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. to Bangkok Don Mueang Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. to Bangkok Don Mueang Intl Airport (WAS to DMK) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to Bangkok Don Mueang Intl Airport

Direct flights

None
There are no direct flights from Washington, D.C. to Bangkok Don Mueang Intl Airport. There are no popular flight routes from Washington, D.C. to Bangkok Don Mueang Intl Airport.
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  • How far is Washington, D.C. to Bangkok Don Mueang Intl by plane?

    There are 8778.0 mi between Washington, D.C. and Bangkok Don Mueang Intl. A reasonable flight in good conditions will take 23h 55m.

  • When did momondo last update prices for flights from Washington, D.C. to Bangkok Don Mueang Intl Airport?

    Prices for flights from Washington, D.C. to Bangkok Don Mueang Intl Airport refresh daily.

  • How old do you have to be to fly from Washington, D.C. to Bangkok Don Mueang Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. to Bangkok Don Mueang Intl Airport.

  • What documentation or ID do you need to fly to Bangkok Don Mueang Intl Airport?

    The travel and health documents you'll need for your trip to Bangkok Don Mueang Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Bangkok Don Mueang Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Bangkok?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington, D.C. to Bangkok. momondo saves you time and could save you money on your trip.

Can I find flights from Washington, D.C. to Bangkok with flexible booking policies on momondo?

Yes. All flights to Bangkok from Washington, D.C. on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Washington, D.C. to Bangkok?

Once you have performed a search for Washington, D.C. to Bangkok flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Washington, D.C. to Bangkok right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Bangkok, momondo offers a useful price alert feature which will track prices for flights to Bangkok from Washington, D.C. and alert you when they change.

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