S$669 Cheap Flights from Washington to Bangkok

View S$669 flight on Wed, 29 Apr, 2026Opens in a new window

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

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 40% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap Flights from Washington to Bangkok (IAD-BKK)

Prices were available within the past 7 days and start at S$669 for one-way flights and S$1,196 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air China
Fri, 24 Oct - Fri, 31 Oct
IAD
Washington
BKK
Bangkok
S$1,196 Return, found 4 days ago
S$1,196
Return
found 4 days ago
Select Air China flight, departing Fri, 24 Oct from Washington to Bangkok, returning Fri, 31 Oct, priced at S$1,196 found 4 days ago
Saudia
Fri, 24 Oct - Fri, 31 Oct
IAD
Washington
BKK
Bangkok
S$1,273 Return, found 4 days ago
S$1,273
Return
found 4 days ago
Select Saudia flight, departing Fri, 24 Oct from Washington to Bangkok, returning Fri, 31 Oct, priced at S$1,273 found 4 days ago
Qatar Airways
Sat, 30 Aug - Sat, 6 Sep
IAD
Washington
BKK
Bangkok
S$1,360 Return, found 4 days ago
S$1,360
Return
found 4 days ago
Select Qatar Airways flight, departing Sat, 30 Aug from Washington to Bangkok, returning Sat, 6 Sep, priced at S$1,360 found 4 days ago
Qatar Airways
Sat, 30 Aug - Sat, 6 Sep
IAD
Washington
BKK
Bangkok
S$1,363 Return, found 4 days ago
S$1,363
Return
found 4 days ago
Select Qatar Airways flight, departing Sat, 30 Aug from Washington to Bangkok, returning Sat, 6 Sep, priced at S$1,363 found 4 days ago
United
Fri, 24 Oct - Fri, 31 Oct
IAD
Washington
BKK
Bangkok
S$1,382 Return, found 4 days ago
S$1,382
Return
found 4 days ago
Select United flight, departing Fri, 24 Oct from Washington to Bangkok, returning Fri, 31 Oct, priced at S$1,382 found 4 days ago
Qatar Airways
Sat, 30 Aug - Sat, 6 Sep
IAD
Washington
BKK
Bangkok
S$1,399 Return, found 4 days ago
S$1,399
Return
found 4 days ago
Select Qatar Airways flight, departing Sat, 30 Aug from Washington to Bangkok, returning Sat, 6 Sep, priced at S$1,399 found 4 days ago
Saudia
Fri, 7 Nov - Sat, 15 Nov
IAD
Washington
BKK
Bangkok
S$1,410 Return, found 4 days ago
S$1,410
Return
found 4 days ago
Select Saudia flight, departing Fri, 7 Nov from Washington to Bangkok, returning Sat, 15 Nov, priced at S$1,410 found 4 days ago
United
Fri, 24 Oct - Fri, 31 Oct
IAD
Washington
BKK
Bangkok
S$1,425 Return, found 4 days ago
S$1,425
Return
found 4 days ago
Select United flight, departing Fri, 24 Oct from Washington to Bangkok, returning Fri, 31 Oct, priced at S$1,425 found 4 days ago
United
Fri, 24 Oct - Fri, 31 Oct
IAD
Washington
BKK
Bangkok
S$1,433 Return, found 4 days ago
S$1,433
Return
found 4 days ago
Select United flight, departing Fri, 24 Oct from Washington to Bangkok, returning Fri, 31 Oct, priced at S$1,433 found 4 days ago
KLM
Fri, 7 Nov - Sat, 15 Nov
IAD
Washington
BKK
Bangkok
S$2,041 Return, found 4 days ago
S$2,041
Return
found 4 days ago
Select KLM flight, departing Fri, 7 Nov from Washington to Bangkok, returning Sat, 15 Nov, priced at S$2,041 found 4 days ago

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

April is typically the cheapest month to fly

From S$1,003 - S$2,180 per traveller.

Graph displaying average flight prices per month

Washington to Bangkok route information
Origin airport
Washington Dulles Intl.
Destination airport
Suvarnabhumi Intl.
Return price
S$1,196
Distance
14075 km

Perfect flights from Washington to Bangkok

Your Journey from Washington to Bangkok

Start your unforgettable journey with Expedia. Our broad selection of flights from Washington to Bangkok caters to every travel need. Whether you're yearning for a romantic escape, a solo adventure, or a cultural immersion, we've got you covered.
 

Choosing Your Ideal Flight

With Expedia, you have access to a wide range of airlines, including United, All Nippon Airways, American Airlines, Etihad Airways, Air China, Saudia, Qatar Airways, KLM. Our selection of flights from Washington Dulles Intl. to Suvarnabhumi Intl. caters to every traveler's requirements, ensuring your journey aligns with your schedule. With options from 20 airlines, you're bound to find the perfect flight.
 

Maximizing Value with Washington to Bangkok Flights

Experience the joy of finding cheap flights from Washington Dulles Intl. to Suvarnabhumi Intl. that fit your budget. Keep an eye out for our special deals and discounts, and check our flexible one-way fares from S$669 and roundtrip prices from S$1,196*.
 

Pre-Flight Essentials

Ensure a smooth journey from Washington to Bangkok with Expedia. From information about check-in times and in-flight amenities to guidance on baggage policies, we provide all the essentials to prepare you for your flight.
 

Experience the Vibrant Bangkok

Picture yourself stepping off the plane in Bangkok and immersing yourself in the unique atmosphere of . From local markets to cultural festivals, each city offers its distinct charm. Make the most of your trip by exploring local attractions and indulging in the local cuisine. With Expedia, explore all this and more, tailored to your budget.
 

Added Convenience on Your Washington to Bangkok Flight

Traveling with Expedia is more than just a flight. We offer details about in-flight amenities, baggage policies, and more to ensure a smooth and hassle-free journey. Choose from our variety of airlines and embark on a memorable journey from Washington to Bangkok.
 

Beyond the Flight – Exploring Bangkok

With Expedia, your adventure extends beyond the flight. Explore Bangkok at your own pace by renting a car or booking a hotel. Discover hidden gems off the beaten path and create unforgettable memories.
 

Book Your Flight from Washington to Bangkok with Confidence

Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support make your travel experience seamless and stress-free. Embark on your journey from Washington to Bangkok with confidence. Book your travel arrangements with Expedia today.
 
*Note: Prices may vary based on availability and are subject to change.

Frequently asked questions

How much is a flight from IAD to Suvarnabhumi Airport?
Within the past 7 days on Expedia, for flights departing within the next year, the lowest price listed for a round-trip flight from IAD to Suvarnabhumi Intl. Airport (BKK) was S$1,196. Fares this good don't wait forever, so make sure you book yours today. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Dulles Intl. Airport to Suvarnabhumi Intl. Airport (BKK)?
Every air carrier has its own terms and conditions. If you do decide to cancel, follow the easy instructions on our Customer Service Portal.
How do I find cheap flights from Washington Dulles Intl. Airport (IAD) to Suvarnabhumi Airport that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for Dulles Intl. Airport to Bangkok Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Washington Dulles Intl. Airport (IAD) to Suvarnabhumi Intl. Airport (BKK)?
With a flight distance of 14,200 kilometres between Chantilly and Bang Phli, this is a long-haul journey. Remember to stay hydrated and move your legs every now and then.
Which airlines fly direct from Washington Dulles Intl. Airport (IAD) to Suvarnabhumi Intl. Airport (BKK)?
At present, no airlines offer direct flights from IAD to Suvarnabhumi Intl. Airport (BKK). You'll have to book a flight with one or more stops. To score the best connections and price, lock in your airfare well in advance.
Are Washington Dulles Intl. Airport (IAD) to Suvarnabhumi Intl. Airport (BKK) flight tickets cheaper when they're purchased at the last minute?
Tickets from IAD to BKK are available up to 12 months prior to departure on Expedia. And although you may occasionally score a fantastic last-minute deal, it's never something you can count on. Also, booking your flights in advance means you'll have more options — and you can avoid getting stuck in the dreaded middle seat! We regularly update our fares to make sure you get the biggest bargains, so keep checking in for all the latest specials.

Explore a world of travel with Expedia

Washington Airports

Washington

Ronald Reagan Washington National to Bangkok
S$1,929.20

Baltimore

*Available to Expedia members.