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Cheap flights from Bangkok to Washington, D.C. Dulles Intl Airport from ฿21,343

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 24/11. Fares are subject to change and may not be available on all flights or dates of travel.
BKK — IAD
22 Aug — 29 Aug1
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 23 July 2026.

Thu 17/915:25
BKK
-
IAD
1 stop35h 20m
ซาอุเดียแอร์ไลน์
Sun 20/918:50
IAD
-
BKK
1 stop31h 55m
ซาอุเดียแอร์ไลน์
Deal found 20/7฿28,029
Thu 3/915:25
BKK
-
IAD
1 stop35h 20m
ซาอุเดียแอร์ไลน์
Fri 4/918:50
IAD
-
BKK
1 stop31h 55m
ซาอุเดียแอร์ไลน์
Deal found 19/7฿29,347
Tue 22/915:25
BKK
-
IAD
1 stop35h 20m
ซาอุเดียแอร์ไลน์
Sun 18/1018:50
IAD
-
BKK
1 stop31h 55m
ซาอุเดียแอร์ไลน์
Deal found 22/7฿32,555
Wed 12/809:35
BKK
-
IAD
1 stop41h 15m
United Airlines
Thu 20/815:40
IAD
-
BKK
2 stops25h 55m
United Airlines
Deal found 23/7฿34,243
Sat 12/909:35
BKK
-
IAD
1 stop35h 30m
United Airlines
Sat 26/917:20
IAD
-
BKK
3 stops29h 15m
United Airlines
Deal found 20/7฿34,277
Mon 21/909:35
BKK
-
IAD
1 stop35h 30m
United Airlines
Tue 9/308:35
IAD
-
BKK
2 stops32h 35m
United Airlines
Deal found 21/7฿34,378
Thu 17/909:35
BKK
-
IAD
1 stop35h 30m
United Airlines
Sun 20/917:15
IAD
-
BKK
3 stops29h 20m
United Airlines
Deal found 20/7฿34,412
Wed 28/1009:10
BKK
-
IAD
2 stops32h 59m
United Airlines
Sun 8/1115:34
IAD
-
BKK
3 stops31h 56m
United Airlines
Deal found 23/7฿34,446
Sun 13/909:35
BKK
-
IAD
1 stop35h 30m
United Airlines
Sat 26/922:18
IAD
-
BKK
2 stops43h 17m
United Airlines
Deal found 20/7฿34,480
Thu 19/1107:10
BKK
-
IAD
2 stops34h 18m
United Airlines
Mon 23/1122:23
IAD
-
BKK
2 stops42h 47m
United Airlines
Deal found 18/7฿34,513
Mon 7/907:25
DMK
-
IAD
1 stop25h 35m
Multiple Airlines
Mon 21/915:10
IAD
-
DMK
2 stops26h 25m
Multiple Airlines
Deal found 22/7฿48,055
Wed 28/1022:55
DMK
-
IAD
1 stop45h 05m
Emirates
Sun 8/1110:30
IAD
-
DMK
1 stop35h 30m
Emirates
Deal found 23/7฿49,204

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 23 July 2026.

Round-trip from

฿28,029

One-way from

฿21,343

Popular in

February

Cheapest in

March

Average price

฿38,735
ซาอุเดียแอร์ไลน์
  • ซาอุเดียแอร์ไลน์
  • 17/9-20/9
  • 2 total stops
  • 67h 15m total
  • Bangkok to Washington, D.C.
Search Deals
STARLUX Airlines
  • STARLUX Airlines
  • 24/11
  • 2 total stops
  • 27h 58m total
  • Bangkok to Washington, D.C.
Search Deals
High demand for flights, 1% potential price rise
Search Deals
Cheapest flight prices on average. 0% potential price decrease (฿6,585 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 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 23 July 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

Fly to

Route

Depart

Return

Price

Cheapest return flight

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 21/9

09:35-10:05

1 stop35h 30m

Washington, D.C. Dulles Intl

Tue 9/3

08:35-05:10

2 stops32h 35m

฿34,378

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 19/11

07:10-05:28

2 stops34h 18m

Washington, D.C. Dulles Intl

Mon 23/11

22:23-05:10

2 stops42h 47m

฿34,513

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sat 3/10

09:35-22:52

2 stops48h 17m

Washington, D.C. Dulles Intl

Thu 15/10

06:35-23:55

2 stops30h 20m

฿34,547

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 17/9

07:00-05:55

2 stops33h 55m

Washington, D.C. Dulles Intl

Sun 20/9

13:10-09:35

3 stops33h 25m

฿34,615

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 14/12

09:10-16:01

2 stops42h 51m

Washington, D.C. Dulles Intl

Tue 29/12

12:20-11:30

2 stops35h 10m

฿36,405
Fastest return journey

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Fri 2/10

02:30-15:40

1 stop24h 10m

Washington, D.C. Dulles Intl

Thu 15/10

21:00-13:25

1 stop29h 25m

฿38,127

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Tue 8/9

15:45-09:28

3 stops28h 43m

Washington, D.C. Dulles Intl

Tue 6/10

06:15-04:35

2 stops35h 20m

฿38,194

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 11/1

09:10-21:27

2 stops24h 17m

Washington, D.C. Dulles Intl

Mon 25/1

10:08-05:10

2 stops31h 02m

฿39,343

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sat 26/9

15:45-07:21

2 stops26h 36m

Washington, D.C. Dulles Intl

Wed 28/10

06:40-11:30

2 stops41h 50m

฿40,052

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sat 19/12

17:15-05:38

2 stops24h 23m

Washington, D.C. Dulles Intl

Fri 15/1

17:38-11:10

2 stops29h 32m

฿42,585

Flights are sorted by cheapest return flights first.

Deals found on 20/7

Showing 1-10 of 44 resultsSorted by cheapest first
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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

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

Currently, March is the cheapest month in which you can book a flight from Bangkok to Washington, D.C. Dulles Intl Airport (average of ฿35,155). Flying from Bangkok to Washington, D.C. Dulles Intl Airport in February is currently the most expensive (average of ฿41,538). 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?

Airfare is below average for this route at the moment.
Bangkok to Washington, D.C. Dulles Intl Airport flights typically cost between ฿35,476 and ฿46,519 in September.
The cheapest return price found within the last 5 days was ฿28,029 on ซาอุเดียแอร์ไลน์ (17 Sep–20 Sep).

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

The best time to book flights from Bangkok to Washington, D.C. Dulles Intl Airport is 90 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.

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 23 July 2026.
Check out reviews from past customers who have flown with Korean Air,United Airlines, 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
1,221 reviews
Check prices

Entertainment

8.2

Crew

8.7

Overall

8.4

Boarding

8.5

Comfort

8.3

Food

8.1

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
1,221 reviews
Korean Air
8.4
Very Good
1,221 reviews
Check prices

Entertainment

8.2

Crew

8.7

Overall

8.4

Boarding

8.5

Comfort

8.3

Food

8.1

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
10,026 reviews
Korean Air
8.4
Very Good
1,221 reviews
Check prices

Entertainment

8.2

Crew

8.7

Overall

8.4

Boarding

8.5

Comfort

8.3

Food

8.1

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
7.3
Good
3,747 reviews
Korean Air
8.4
Very Good
1,221 reviews
Check prices

Entertainment

8.2

Crew

8.7

Overall

8.4

Boarding

8.5

Comfort

8.3

Food

8.1

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
1,486 reviews
Korean Air
8.4
Very Good
1,221 reviews
Check prices

Entertainment

8.2

Crew

8.7

Overall

8.4

Boarding

8.5

Comfort

8.3

Food

8.1

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 ฿49,237, United Airlines can have you in Washington, D.C. Dulles Intl Airport from Bangkok in 31h 30m. The distance between Bangkok and Washington, D.C. Dulles Intl Airport is about 14124 km. This flight may include one or multiple stops.

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

    According to our current data, United Airlines (฿27,630), เอทิฮัดแอร์เวย์ (฿33,686), and Korean Air (฿34,050) offers the cheapest pricing from Bangkok to Washington, D.C. Dulles Intl Airport. United Airlines is currently priced 29% 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, March is the cheapest month in which you can book a flight from Bangkok to Washington, D.C. Dulles Intl Airport (average of ฿35,155). Flying from Bangkok to Washington, D.C. Dulles Intl Airport in February is currently the most expensive (average of ฿41,538). 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

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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 Baltimore flights
Chiang Mai to Reagan-National flights
Chiang Mai to Dulles Intl flights

Top 4 airlines flying from Bangkok to Dulles Intl

Discover the top 4 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 23 July 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest฿27,630Average฿35,650FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
เอทิฮัดแอร์เวย์Cheapest฿33,686Average฿34,093FlexibilityNo cancel feeOn-time75%
Search เอทิฮัดแอร์เวย์ flights
Korean AirCheapest฿34,050Average฿37,218FlexibilityNo cancel feeOn-time81%
Search Korean Air flights
Qatar AirwaysCheapest฿37,959Average฿42,321FlexibilityNo 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.

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