Find flights
When to book
Airlines
FAQs

Cheap flights from Bangkok to Washington, D.C. Dulles Intl Airport from ฿18,682

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/3. Fares are subject to change and may not be available on all flights or dates of travel.
BKK — IAD
8 Mar — 15 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Bangkok to Dulles Intl

Enter your travel dates to find the best prices.

Cheapest flights from Bangkok to Dulles Intl
Explore the most affordable flight options available from Bangkok to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 6 February 2026.

Tue 10/315:20
BKK
-
IAD
1 stop35h 25m
ซาอุเดียแอร์ไลน์
Fri 13/319:10
IAD
-
BKK
1 stop31h 30m
ซาอุเดียแอร์ไลน์
Deal found 5/2฿27,754
Sat 7/212:00
BKK
-
IAD
2 stops43h 20m
IndiGo
Sun 15/221:15
IAD
-
BKK
2 stops35h 50m
IndiGo
Deal found 6/2฿29,778
Thu 28/522:45
BKK
-
IAD
1 stop23h 05m
AIR PREMIA
Fri 12/613:20
IAD
-
BKK
1 stop44h 50m
AIR PREMIA
Deal found 6/2฿31,643
Tue 24/323:50
BKK
-
IAD
2 stops40h 50m
Multiple Airlines
Tue 31/315:10
IAD
-
BKK
1 stop21h 40m
Multiple Airlines
Deal found 2/2฿31,959
Sun 10/516:45
BKK
-
IAD
2 stops24h 05m
Multiple Airlines
Sun 13/919:18
IAD
-
BKK
2 stops28h 32m
Multiple Airlines
Deal found 5/2฿31,990
Wed 25/210:10
BKK
-
IAD
2 stops45h 10m
Multiple Airlines
Mon 2/314:35
IAD
-
BKK
1 stop20h 50m
Multiple Airlines
Deal found 3/2฿32,022
Sun 10/522:45
BKK
-
IAD
1 stop23h 05m
AIR PREMIA
Sun 13/913:20
IAD
-
BKK
1 stop44h 50m
AIR PREMIA
Deal found 6/2฿32,148
Mon 20/415:20
BKK
-
IAD
1 stop35h 25m
Multiple Airlines
Mon 27/415:10
IAD
-
BKK
1 stop28h 05m
Multiple Airlines
Deal found 4/2฿32,180
Mon 25/501:50
BKK
-
IAD
1 stop24h 55m
ซาอุเดียแอร์ไลน์
Fri 12/618:50
IAD
-
BKK
1 stop31h 55m
ซาอุเดียแอร์ไลน์
Deal found 6/2฿32,243
Thu 5/315:20
BKK
-
IAD
1 stop35h 25m
Multiple Airlines
Thu 12/315:35
IAD
-
BKK
1 stop20h 50m
Multiple Airlines
Deal found 4/2฿32,781
Wed 1/421:10
DMK
-
IAD
2 stops29h 30m
Multiple Airlines
Tue 21/415:10
IAD
-
DMK
2 stops26h 10m
Multiple Airlines
Deal found 3/2฿34,709
Tue 24/316:00
DMK
-
IAD
2 stops31h 45m
Multiple Airlines
Tue 31/315:10
IAD
-
DMK
2 stops26h 20m
Multiple Airlines
Deal found 4/2฿36,447

Find flight deals from Bangkok to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Bangkok (TH1) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 6 February 2026.

Round-trip from

฿27,754

One-way from

฿18,682

Popular in

October

Cheapest in

July

Average price

฿35,531
ซาอุเดียแอร์ไลน์
  • ซาอุเดียแอร์ไลน์
  • 10/3-13/3
  • 2 total stops
  • 66h 55m total
  • Bangkok to Washington, D.C.
Search Deals
11/3
  • 11/3
  • 3 total stops
  • 39h 21m total
  • Bangkok to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (฿47,107 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (฿14,535 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Bangkok to Dulles Intl 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, Cheapflights users made 17,341 searches. Data last updated 6 February 2026.
Use the filters below to find and compare flights from Bangkok to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Bangkok

Fly to

Dulles Intl

Route

Depart

Return

Price

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Tue 24/3

23:50-05:40

2 stops40h 50m

Washington, D.C. Dulles Intl

Tue 31/3

15:10-23:50

1 stop21h 40m

฿31,959

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 25/2

10:10-19:20

2 stops45h 10m

Washington, D.C. Dulles Intl

Mon 2/3

14:35-23:25

1 stop20h 50m

฿32,022

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sun 10/5

15:45-22:49

3 stops42h 04m

Washington, D.C. Dulles Intl

Sun 13/9

10:08-04:35

2 stops31h 27m

฿32,907

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Fri 24/4

15:45-11:33

3 stops30h 48m

Washington, D.C. Dulles Intl

Sun 3/5

12:15-04:35

1 stop29h 20m

฿32,970

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Tue 3/3

16:55-21:18

3 stops40h 23m

Washington, D.C. Dulles Intl

Tue 12/5

18:55-09:35

2 stops27h 40m

฿33,350

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 1/4

15:25-15:40

3 stops35h 15m

Washington, D.C. Dulles Intl

Tue 21/4

15:10-06:15

1 stop28h 05m

฿33,413

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Tue 5/5

16:45-18:20

2 stops36h 35m

Washington, D.C. Dulles Intl

Tue 28/7

17:01-10:50

2 stops30h 49m

฿33,476

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Tue 3/3

16:55-11:49

3 stops30h 54m

Washington, D.C. Dulles Intl

Tue 5/5

20:29-09:35

2 stops50h 06m

฿33,476

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 25/2

16:55-11:49

3 stops30h 54m

Washington, D.C. Dulles Intl

Mon 2/3

22:05-11:25

2 stops49h 20m

฿33,539

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 20/4

15:45-11:48

3 stops31h 03m

Washington, D.C. Dulles Intl

Mon 27/4

22:15-09:35

2 stops48h 20m

฿33,571

Flights are sorted by cheapest return flights first.

Deals found on 5/2

Showing 1-10 of 42 results
1
2
3
...
5

Best time to book a flight from Bangkok to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Bangkok with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Bangkok to Washington, D.C. Dulles Intl Airport

How far ahead should I book a flight from Bangkok to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the optimal time to book a return flight from Bangkok to Dulles Intl. Price data was last updated on 30 January 2026.

The best time to book flights from Bangkok to Washington, D.C. Dulles Intl Airport is 80 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Bangkok to Washington, D.C. Dulles Intl Airport?

Currently, June is the cheapest month in which you can book a flight from Bangkok to Washington, D.C. Dulles Intl Airport (average of ฿29,525). Flying from Bangkok to Washington, D.C. Dulles Intl Airport in January is currently the most expensive (average of ฿35,720). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost for a return flight from Bangkok to Washington, D.C. Dulles Intl Airport?

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Dulles Intl. Reviews last updated 6 February 2026.
Check out reviews from past customers who have flown with Korean Air, ANA, andQatar Airways from Bangkok to Washington, D.C. Dulles Intl Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very Good
1,188 reviews
Check prices

Entertainment

8.2

Crew

8.7

Boarding

8.5

Overall

8.4

Food

8.1

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Korean Air
8.4
Very Good
1,188 reviews
Korean Air
8.4
Very Good
1,188 reviews
Check prices

Entertainment

8.2

Crew

8.7

Boarding

8.5

Overall

8.4

Food

8.1

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
ANA
8.4
Very Good
1,087 reviews
Korean Air
8.4
Very Good
1,188 reviews
Check prices

Entertainment

8.2

Crew

8.7

Boarding

8.5

Overall

8.4

Food

8.1

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Qatar Airways
7.4
Good
3,730 reviews
Korean Air
8.4
Very Good
1,188 reviews
Check prices

Entertainment

8.2

Crew

8.7

Boarding

8.5

Overall

8.4

Food

8.1

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
United Airlines
7.4
Good
9,246 reviews
Korean Air
8.4
Very Good
1,188 reviews
Check prices

Entertainment

8.2

Crew

8.7

Boarding

8.5

Overall

8.4

Food

8.1

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
เอทิฮัดแอร์เวย์
7.3
Good
1,387 reviews
Korean Air
8.4
Very Good
1,188 reviews
Check prices

Entertainment

8.2

Crew

8.7

Boarding

8.5

Overall

8.4

Food

8.1

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!

Related info for your journey

Find useful and relevant information for your journey from Bangkok to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Bangkok to Washington, D.C. Dulles Intl Airport?

    For as low as ฿32,907, United Airlines can have you in Washington, D.C. Dulles Intl Airport from Bangkok in 42h 04m. The distance between Bangkok and Washington, D.C. Dulles Intl Airport is about 14149 km.

  • What are the cheapest airlines flying from Bangkok to Washington, D.C. Dulles Intl Airport round-trip?

    According to our current data, ซาอุเดียแอร์ไลน์ (฿27,850), United Airlines (฿30,674), and เอทิฮัดแอร์เวย์ (฿31,532) offers the cheapest pricing from Bangkok to Washington, D.C. Dulles Intl Airport. ซาอุเดียแอร์ไลน์ is currently priced 24% below the average price you’ll pay for this route.

  • Can I find deals for flights from Bangkok to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Bangkok to Dulles Intl flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Bangkok to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Bangkok to Dulles Intl.

  • Can I find deals for business class flights from Bangkok to Dulles Intl?

    Yes. Cheapflights offers flight deals from Bangkok to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Bangkok to Washington, D.C. Dulles Intl Airport?

    Currently, June is the cheapest month in which you can book a flight from Bangkok to Washington, D.C. Dulles Intl Airport (average of ฿29,525). Flying from Bangkok to Washington, D.C. Dulles Intl Airport in January is currently the most expensive (average of ฿35,720). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Bangkok to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
Chiang Mai to Dulles Intl flights
Chiang Mai to Reagan-National flights
Chiang Mai to Baltimore flights

Top 6 airlines flying from Bangkok to Dulles Intl

Discover the top 6 airlines that operate flights from Bangkok to Dulles Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 17,341 searches. Data last updated 6 February 2026.
AirlineCheapestAverageFlexibilityOn-time
ซาอุเดียแอร์ไลน์Cheapest฿27,850Average฿30,583FlexibilityNo cancel feeOn-time86%
Search ซาอุเดียแอร์ไลน์ flights
United AirlinesCheapest฿30,674Average฿32,069FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
เอทิฮัดแอร์เวย์Cheapest฿31,532Average฿31,913FlexibilityNo cancel feeOn-time75%
Search เอทิฮัดแอร์เวย์ flights
Korean AirCheapest฿31,966Average฿35,584FlexibilityNo cancel feeOn-time81%
Search Korean Air flights
ANACheapest฿33,492Average฿42,072FlexibilityNo cancel feeOn-time80%
Search ANA flights
Qatar AirwaysCheapest฿35,531Average฿39,142FlexibilityNo cancel feeOn-time68%
Search Qatar Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Bangkok to Dulles Intl?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Bangkok to Dulles Intl. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Bangkok to Dulles Intl?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Bangkok to Dulles Intl.

Can Cheapflights find flights from Bangkok to Dulles Intl with no change fees?

Need flexible booking options for your flight to Dulles Intl from Bangkok? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Bangkok to Dulles Intl become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Dulles Intl from Bangkok today and book when prices fit your budget.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book With Flexibility

Our users can plan ahead with confidence and find flights with no change fees.

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.