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Cheap flights from Bangkok to Washington, D.C. Dulles Intl Airport from ฿20,499

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 8/9. Fares are subject to change and may not be available on all flights or dates of travel.
BKK — IAD
1 Aug — 8 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 2 July 2026.

Thu 22/1015:25
BKK
-
IAD
1 stop35h 20m
ซาอุเดียแอร์ไลน์
Sat 7/1118:10
IAD
-
BKK
1 stop31h 30m
ซาอุเดียแอร์ไลน์
Deal found 30/6฿26,699
Sun 4/1009:35
BKK
-
IAD
1 stop35h 30m
United Airlines
Sat 24/1012:40
IAD
-
BKK
3 stops35h 50m
United Airlines
Deal found 28/6฿29,465
Wed 7/1007:00
BKK
-
IAD
2 stops25h 11m
ANA
Wed 14/1022:13
IAD
-
BKK
2 stops38h 42m
ANA
Deal found 30/6฿31,132
Wed 30/907:00
BKK
-
IAD
2 stops35h 19m
United Airlines
Sun 4/1008:20
IAD
-
BKK
2 stops33h 15m
United Airlines
Deal found 28/6฿31,398
Thu 9/709:35
BKK
-
IAD
1 stop41h 15m
United Airlines
Thu 20/808:35
IAD
-
BKK
2 stops28h 20m
United Airlines
Deal found 30/6฿31,498
Thu 9/709:35
BKK
-
IAD
2 stops48h 44m
United Airlines
Mon 20/713:10
IAD
-
BKK
2 stops33h 25m
United Airlines
Deal found 30/6฿31,565
Fri 3/707:00
BKK
-
IAD
2 stops25h 00m
United Airlines
Sat 25/715:15
IAD
-
BKK
2 stops31h 20m
United Airlines
Deal found 29/6฿31,732
Tue 25/807:00
BKK
-
IAD
2 stops25h 22m
United Airlines
Tue 8/906:15
IAD
-
BKK
2 stops30h 40m
United Airlines
Deal found 29/6฿31,765
Wed 8/707:00
BKK
-
IAD
2 stops27h 19m
United Airlines
Wed 29/720:00
IAD
-
BKK
2 stops26h 35m
United Airlines
Deal found 29/6฿31,998
Sun 25/1011:00
DMK
-
IAD
1 stop33h 00m
Emirates
Fri 13/1110:30
IAD
-
DMK
1 stop21h 45m
Emirates
Deal found 27/6฿48,631
Tue 20/1012:10
DMK
-
IAD
1 stop31h 30m
Emirates
Sun 25/1011:15
IAD
-
DMK
1 stop22h 00m
Emirates
Deal found 30/6฿48,931
Tue 29/912:10
DMK
-
IAD
1 stop31h 30m
Emirates
Sat 3/1010:55
IAD
-
DMK
1 stop37h 15m
Emirates
Deal found 1/7฿49,064

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 2 July 2026.

Round-trip from

฿26,699

One-way from

฿20,499

Popular in

February

Cheapest in

July

Average price

฿33,865
ซาอุเดียแอร์ไลน์
  • ซาอุเดียแอร์ไลน์
  • 22/10-7/11
  • 2 total stops
  • 66h 50m total
  • Bangkok to Washington, D.C.
Search Deals
AIR PREMIA
  • AIR PREMIA
  • 8/9
  • 1 total stop
  • 23h 05m total
  • Bangkok to Washington, D.C.
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 0% potential price decrease (฿7,509 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 2 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

Wed 30/9

07:00-21:27

2 stops25h 27m

Washington, D.C. Dulles Intl

Sun 4/10

22:29-04:35

2 stops43h 06m

฿31,398

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 17/9

09:50-11:05

1 stop36h 15m

Washington, D.C. Dulles Intl

Mon 21/9

13:15-01:05

1 stop24h 50m

฿34,831

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 7/10

09:35-05:31

2 stops30h 56m

Washington, D.C. Dulles Intl

Wed 14/10

13:10-09:35

3 stops33h 25m

฿36,298

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Tue 6/10

09:35-15:35

1 stop41h 00m

Washington, D.C. Dulles Intl

Wed 14/10

14:47-09:35

2 stops31h 48m

฿37,665

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sat 18/7

15:45-15:50

2 stops35h 05m

Washington, D.C. Dulles Intl

Sat 8/8

14:35-09:35

3 stops32h 00m

฿37,731

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sun 25/10

23:15-10:50

1 stop22h 35m

Washington, D.C. Dulles Intl

Fri 13/11

07:05-00:45

2 stops29h 40m

฿37,831

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 16/7

07:00-00:55

2 stops28h 55m

Washington, D.C. Dulles Intl

Sun 19/7

10:31-09:35

3 stops36h 04m

฿38,598

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Tue 18/8

23:30-23:59

2 stops35h 29m

Washington, D.C. Dulles Intl

Sun 13/9

06:00-21:45

2 stops28h 45m

฿39,265

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 30/9

20:00-08:45

1 stop23h 45m

Washington, D.C. Dulles Intl

Sun 4/10

21:00-12:55

1 stop28h 55m

฿39,598

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Tue 18/8

09:35-22:45

2 stops48h 10m

Washington, D.C. Dulles Intl

Sun 13/9

15:40-09:35

3 stops30h 55m

฿39,965

Flights are sorted by cheapest return flights first.

Deals found on 28/6

Showing 1-10 of 38 resultsSorted by cheapest first
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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, April is the cheapest month in which you can book a flight from Bangkok to Washington, D.C. Dulles Intl Airport (average of ฿15,732). Flying from Bangkok to Washington, D.C. Dulles Intl Airport in November is currently the most expensive (average of ฿39,231). 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?

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 2 July 2026.
Check out reviews from past customers who have flown with Korean Air,ANA, andUnited Airlines 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
1,220 reviews
Check prices

Overall

8.4

Comfort

8.3

Food

8.1

Boarding

8.5

Crew

8.7

Entertainment

8.2

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
1,220 reviews
Korean Air
8.4
Very Good
1,220 reviews
Check prices

Overall

8.4

Comfort

8.3

Food

8.1

Boarding

8.5

Crew

8.7

Entertainment

8.2

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
8.3
Very Good
1,260 reviews
Korean Air
8.4
Very Good
1,220 reviews
Check prices

Overall

8.4

Comfort

8.3

Food

8.1

Boarding

8.5

Crew

8.7

Entertainment

8.2

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
9,927 reviews
Korean Air
8.4
Very Good
1,220 reviews
Check prices

Overall

8.4

Comfort

8.3

Food

8.1

Boarding

8.5

Crew

8.7

Entertainment

8.2

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
1,471 reviews
Korean Air
8.4
Very Good
1,220 reviews
Check prices

Overall

8.4

Comfort

8.3

Food

8.1

Boarding

8.5

Crew

8.7

Entertainment

8.2

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 ฿31,132, ซาอุเดียแอร์ไลน์ can have you in Washington, D.C. Dulles Intl Airport from Bangkok in 25h 11m. The distance between Bangkok and Washington, D.C. Dulles Intl Airport is about 14149 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 (฿32,222), เอทิฮัดแอร์เวย์ (฿33,249), and Korean Air (฿33,608) offers the cheapest pricing from Bangkok to Washington, D.C. Dulles Intl Airport. United Airlines is currently priced 16% 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, April is the cheapest month in which you can book a flight from Bangkok to Washington, D.C. Dulles Intl Airport (average of ฿15,732). Flying from Bangkok to Washington, D.C. Dulles Intl Airport in November is currently the most expensive (average of ฿39,231). 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 Dulles Intl flights
Chiang Mai to Baltimore flights
Chiang Mai to Reagan-National 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 2 July 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest฿32,222Average฿33,830FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
เอทิฮัดแอร์เวย์Cheapest฿33,249Average฿33,650FlexibilityNo cancel feeOn-time75%
Search เอทิฮัดแอร์เวย์ flights
Korean AirCheapest฿33,608Average฿36,735FlexibilityNo cancel feeOn-time81%
Search Korean Air flights
ANACheapest฿36,489Average฿41,582FlexibilityNo cancel feeOn-time80%
Search ANA 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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