£373 Cheap Flights from Washington (IAD) to Bangkok (BKK)

View £373 flight on Sun, 3 May 2026Opens in a new window

Popular airlines from Washington Dulles International Airport (IAD) to Suvarnabhumi International Airport (BKK)

Cheap Flights from Washington (IAD) to Bangkok (BKK)

Prices were available within the past 7 days and start at £373 for one-way flights and £696 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Etihad Airways
Fri, 8 May - Mon, 18 May
IAD
Washington
BKK
Bangkok
£696 Return, found 18 hours ago
£696
Return
found 18 hours ago
Select Etihad Airways flight, departing Fri, 8 May from Washington to Bangkok, returning Mon, 18 May, priced at £696 found 18 hours ago
Qatar Airways
Sat, 9 May - Mon, 18 May
IAD
Washington
BKK
Bangkok
£753 Return, found 5 days ago
£753
Return
found 5 days ago
Select Qatar Airways flight, departing Sat, 9 May from Washington to Bangkok, returning Mon, 18 May, priced at £753 found 5 days ago
ITA Airways
Sat, 22 Aug - Wed, 23 Sept
IAD
Washington
BKK
Bangkok
£792 Return, found 1 day ago
£792
Return
found 1 day ago
Select ITA Airways flight, departing Sat, 22 Aug from Washington to Bangkok, returning Wed, 23 Sept, priced at £792 found 1 day ago
Saudia
Fri, 8 May - Tue, 12 May
IAD
Washington
BKK
Bangkok
£891 Return, found 6 days ago
£891
Return
found 6 days ago
Select Saudia flight, departing Fri, 8 May from Washington to Bangkok, returning Tue, 12 May, priced at £891 found 6 days ago
Alaska Airlines
Sun, 1 Nov - Sun, 22 Nov
IAD
Washington
BKK
Bangkok
£927 Return, found 20 hours ago
£927
Return
found 20 hours ago
Select Alaska Airlines flight, departing Sun, 1 Nov from Washington to Bangkok, returning Sun, 22 Nov, priced at £927 found 20 hours ago
Turkish Airlines
Wed, 7 Oct - Wed, 14 Oct
IAD
Washington
BKK
Bangkok
£943 Return, found 1 day ago
£943
Return
found 1 day ago
Select Turkish Airlines flight, departing Wed, 7 Oct from Washington to Bangkok, returning Wed, 14 Oct, priced at £943 found 1 day ago
Austrian Airlines
Mon, 30 Nov - Mon, 14 Dec
IAD
Washington
BKK
Bangkok
£1,098 Return, found 4 days ago
£1,098
Return
found 4 days ago
Select Austrian Airlines flight, departing Mon, 30 Nov from Washington to Bangkok, returning Mon, 14 Dec, priced at £1,098 found 4 days ago
American Airlines
Mon, 8 Jun - Mon, 15 Jun
IAD
Washington
BKK
Bangkok
£1,124 Return, found 4 days ago
£1,124
Return
found 4 days ago
Select American Airlines flight, departing Mon, 8 Jun from Washington to Bangkok, returning Mon, 15 Jun, priced at £1,124 found 4 days ago
JetBlue Airways
Fri, 1 May - Sat, 16 May
IAD
Washington
BKK
Bangkok
£1,155 Return, found 3 days ago
£1,155
Return
found 3 days ago
Select JetBlue Airways flight, departing Fri, 1 May from Washington to Bangkok, returning Sat, 16 May, priced at £1,155 found 3 days ago
Swiss International Air Lines
Sat, 22 Aug - Wed, 23 Sept
IAD
Washington
BKK
Bangkok
£1,161 Return, found 1 day ago
£1,161
Return
found 1 day ago
Select Swiss International Air Lines flight, departing Sat, 22 Aug from Washington to Bangkok, returning Wed, 23 Sept, priced at £1,161 found 1 day ago

Alternative airports near Bangkok

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Suvarnabhumi Intl. BKK. Cheapest option available. Average driving time to city centre is 23 minutes. Flights from £704
BKK
Suvarnabhumi Intl.
Cheapest
Average driving time to city centre23 min
Flights from £704

Find the cheapest month to fly from Washington (IAD) to Bangkok (BKK)

April is typically the cheapest month to fly

From £569 - £1,277 per traveller.

Frequently asked questions

How do I find cheap flights from Washington, DC (IAD-Washington Dulles Intl.) to Bangkok (BKK-Suvarnabhumi Intl.)?
To find a cheap flight from Washington, DC (IAD-Washington Dulles Intl.) to Bangkok (BKK-Suvarnabhumi Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Washington, DC (IAD-Washington Dulles Intl.) to Bangkok (BKK-Suvarnabhumi Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Washington, DC (IAD-Washington Dulles Intl.) to Bangkok (BKK-Suvarnabhumi Intl.)?
There are approximately 79 connecting flights per day from Washington, DC (IAD-Washington Dulles Intl.) to Bangkok (BKK-Suvarnabhumi Intl.). Some common connection points include Heathrow (LHR), Pearson Intl. (YYZ), and Fiumicino - Leonardo da Vinci Intl. (FCO).
What is the earliest flight from Washington, DC (IAD-Washington Dulles Intl.) to Bangkok (BKK-Suvarnabhumi Intl.)?
The earliest flight from Washington Dulles Intl. (IAD) to Suvarnabhumi Intl. (BKK) typically departs at approximately 12:55 AM local time, operated by BR. This is a seasonal service active in November. An early departure like this can help maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Washington, DC (IAD-Washington Dulles Intl.) to Bangkok (BKK-Suvarnabhumi Intl.)?
You'll typically find the most flights from Washington Dulles Intl. (IAD) to Suvarnabhumi Intl. (BKK) on a Wednesday, with around 69 flights available. This gives you a good selection of options for your travel plans. Major airlines on this route include United Airlines, Qatar Airways, and Alaska Airlines. Flight schedules are consistent throughout the week, so you'll have plenty of options no matter which day you choose.
What are the most popular departure times for flights from Washington, DC (IAD-Washington Dulles Intl.) to Bangkok (BKK-Suvarnabhumi Intl.)?
The most popular departure times for flights from Washington, DC (IAD-Washington Dulles Intl.) to Bangkok (BKK-Suvarnabhumi Intl.) are in the morning, from 9am to 12pm. About 26% of passengers prefer this time. Many major carriers, including Qatar Airways, Emirates and Korean Air, offer flights during this window. This timing works well because it allows you to start your journey earlier in the day.
How long does it take to fly from Washington, DC (IAD-Washington Dulles Intl.) to Bangkok (BKK-Suvarnabhumi Intl.)?
A flight from IAD to BKK with a layover takes around 24 hours 30 minutes, with the route covering approximately 8,798 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Washington, DC (IAD-Washington Dulles Intl.) to Bangkok (BKK-Suvarnabhumi Intl.)?
Select the "Business class" and "First class" filters when looking for IAD to BKK flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Washington, DC (IAD-Washington Dulles Intl.) to Bangkok (BKK-Suvarnabhumi Intl.) flight with Expedia?
It's easy to earn miles on a Washington, DC (IAD-Washington Dulles Intl.) to Bangkok (BKK-Suvarnabhumi Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Bangkok from Washington Dulles Intl. (IAD)?
When traveling from Washington Dulles Intl. (IAD) to Bangkok, you can fly into Suvarnabhumi Intl. (BKK) and Don Mueang Intl. (DMK). Some flights may connect through major hubs like Heathrow (LHR), ZRH (ZRH), Dubai Intl. (DXB) before reaching Bangkok. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Washington, DC (IAD-Washington Dulles Intl.) to Bangkok (BKK-Suvarnabhumi Intl.) at the last minute?
Typically, booking a last minute flight from Washington, DC (IAD-Washington Dulles Intl.) to Bangkok (BKK-Suvarnabhumi Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Washington, DC (IAD-Washington Dulles Intl.) to Bangkok (BKK-Suvarnabhumi Intl.) flight and hotel package?
Securing a Washington, DC (IAD-Washington Dulles Intl.) to Bangkok (BKK-Suvarnabhumi Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Washington, DC (IAD-Washington Dulles Intl.) to Bangkok (BKK-Suvarnabhumi Intl.)?
If you booked your Washington, DC (IAD-Washington Dulles Intl.) to Bangkok (BKK-Suvarnabhumi Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Suvarnabhumi Intl.
Airlines serving
Air France, Alaska Airlines, All Nippon Airways, American Airlines, Austrian Airlines, British Airways, Delta, EVA Airways, Emirates, Etihad Airways, ITA Airways, JetBlue Airways, KLM, Korean Air, Lufthansa, Qatar Airways, Royal Jordanian, Saudia, Swiss International Air Lines, Turkish Airlines
Return price
£696
Distance
14075 km

Book with confidence

Compare flights from Washington to Bangkok easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Washington to Bangkok. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Suvarnabhumi Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Washington Dulles Intl. to Suvarnabhumi Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Washington Dulles Intl. (IAD) to Suvarnabhumi Intl. (BKK)

The easiest way to view the best deals on flights from Washington to Bangkok today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Washington Dulles Intl. to Suvarnabhumi Intl. start at just £696 and range up to £1,161.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Washington and Bangkok
  • booking your flight during May, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Washington to Bangkok flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Washington Dulles Intl. to Suvarnabhumi Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Washington to Bangkok easily and book with confidence

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*Available to Expedia members.