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Cheap flights from Bangkok to Washington, D.C. Dulles Intl Airport from ฿19,439

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 25/5. Fares are subject to change and may not be available on all flights or dates of travel.
BKK — IAD
9 May — 16 May1
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 9 April 2026.

Mon 15/607:00
BKK
-
IAD
2 stops59h 26m
United Airlines
Mon 20/722:15
IAD
-
BKK
2 stops43h 20m
United Airlines
Deal found 4/4฿25,973
Wed 26/807:00
BKK
-
IAD
2 stops25h 09m
United Airlines
Wed 9/912:35
IAD
-
BKK
1 stop29h 00m
United Airlines
Deal found 5/4฿26,005
Sun 21/607:00
BKK
-
IAD
2 stops25h 00m
United Airlines
Thu 23/706:30
IAD
-
BKK
2 stops59h 05m
United Airlines
Deal found 4/4฿26,101
Tue 25/807:00
BKK
-
IAD
2 stops25h 09m
United Airlines
Fri 28/809:00
IAD
-
BKK
2 stops37h 35m
United Airlines
Deal found 6/4฿26,133
Tue 30/607:00
BKK
-
IAD
2 stops25h 01m
United Airlines
Wed 22/706:30
IAD
-
BKK
2 stops35h 05m
United Airlines
Deal found 5/4฿26,165
Mon 6/709:35
BKK
-
IAD
2 stops46h 26m
United Airlines
Wed 15/722:20
IAD
-
BKK
2 stops48h 15m
United Airlines
Deal found 5/4฿26,389
Tue 30/607:00
BKK
-
IAD
2 stops27h 19m
ANA
Wed 22/712:50
IAD
-
BKK
1 stop28h 45m
ANA
Deal found 5/4฿26,741
Sun 12/402:30
BKK
-
IAD
1 stop24h 40m
Multiple Airlines
Sun 26/414:05
IAD
-
BKK
1 stop29h 40m
Multiple Airlines
Deal found 5/4฿32,185
Thu 1/1009:35
BKK
-
IAD
2 stops45h 58m
United Airlines
Mon 5/1017:30
IAD
-
BKK
2 stops29h 05m
United Airlines
Deal found 7/4฿32,698
Wed 10/611:50
DMK
-
IAD
2 stops41h 20m
Multiple Airlines
Wed 9/921:00
IAD
-
DMK
2 stops27h 05m
Multiple Airlines
Deal found 8/4฿41,857
Sat 20/619:05
DMK
-
IAD
2 stops31h 35m
Multiple Airlines
Thu 23/715:10
IAD
-
DMK
2 stops26h 30m
Multiple Airlines
Deal found 4/4฿43,586
Mon 22/615:15
DMK
-
IAD
2 stops28h 30m
Multiple Airlines
Thu 23/715:10
IAD
-
DMK
3 stops31h 20m
Multiple Airlines
Deal found 4/4฿44,003

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 9 April 2026.

Round-trip from

฿25,973

One-way from

฿19,439

Popular in

May

Cheapest in

July

Average price

฿35,836
United Airlines
  • United Airlines
  • 15/6-20/7
  • 4 total stops
  • 102h 46m total
  • Bangkok to Washington, D.C.
Search Deals
แอร์แคนาดา
  • แอร์แคนาดา
  • 25/5
  • 2 total stops
  • 39h 38m total
  • Bangkok to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (฿45,023 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (฿13,807 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 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 9 April 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

Sun 3/5

02:30-16:05

1 stop24h 35m

Washington, D.C. Dulles Intl

Mon 11/5

20:20-14:15

1 stop30h 55m

฿33,563
Fastest return journey

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Tue 5/5

01:00-16:05

1 stop26h 05m

Washington, D.C. Dulles Intl

Wed 13/5

11:00-19:50

1 stop21h 50m

฿33,563

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 1/10

07:00-11:43

2 stops39h 43m

Washington, D.C. Dulles Intl

Mon 5/10

06:00-09:35

2 stops40h 35m

฿33,691

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 25/6

07:00-21:00

2 stops25h 00m

Washington, D.C. Dulles Intl

Mon 14/9

07:00-09:35

2 stops39h 35m

฿35,708

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 29/4

19:45-18:10

1 stop33h 25m

Washington, D.C. Dulles Intl

Wed 27/5

15:10-06:45

1 stop28h 35m

฿38,302

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 15/6

07:00-07:26

2 stops59h 26m

Washington, D.C. Dulles Intl

Mon 20/7

12:50-09:35

3 stops33h 45m

฿38,591

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 27/7

03:00-15:40

1 stop23h 40m

Washington, D.C. Dulles Intl

Tue 25/8

21:00-13:25

1 stop29h 25m

฿39,263

BangkokWashington, D.C.

DMK - IAD

DMKIAD

Bangkok Don Mueang Intl

Wed 10/6

11:50-18:10

2 stops41h 20m

Washington, D.C. Dulles Intl

Wed 9/9

21:00-11:05

2 stops27h 05m

฿41,857

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Fri 3/7

09:35-05:41

2 stops31h 06m

Washington, D.C. Dulles Intl

Fri 17/7

06:33-04:35

2 stops35h 02m

฿42,914

BangkokWashington, D.C.

DMK - IAD

DMKIAD

Bangkok Don Mueang Intl

Sat 20/6

19:05-15:40

2 stops31h 35m

Washington, D.C. Dulles Intl

Thu 23/7

15:10-04:40

2 stops26h 30m

฿43,586

Flights are sorted by cheapest return flights first.

Deals found on 8/4

Showing 1-10 of 39 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

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 3 April 2026.

The best time to book flights from Bangkok to Washington, D.C. Dulles Intl Airport is 81 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, July is the cheapest month in which you can book a flight from Bangkok to Washington, D.C. Dulles Intl Airport (average of ฿31,097). Flying from Bangkok to Washington, D.C. Dulles Intl Airport in January is currently the most expensive (average of ฿36,413). 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 9 April 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
1,205 reviews
Check prices

Comfort

8.3

Crew

8.7

Boarding

8.5

Food

8.1

Entertainment

8.2

Overall

8.4

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
1,205 reviews
Korean Air
8.4
Very Good
1,205 reviews
Check prices

Comfort

8.3

Crew

8.7

Boarding

8.5

Food

8.1

Entertainment

8.2

Overall

8.4

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
1,170 reviews
Korean Air
8.4
Very Good
1,205 reviews
Check prices

Comfort

8.3

Crew

8.7

Boarding

8.5

Food

8.1

Entertainment

8.2

Overall

8.4

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
9,554 reviews
Korean Air
8.4
Very Good
1,205 reviews
Check prices

Comfort

8.3

Crew

8.7

Boarding

8.5

Food

8.1

Entertainment

8.2

Overall

8.4

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
1,428 reviews
Korean Air
8.4
Very Good
1,205 reviews
Check prices

Comfort

8.3

Crew

8.7

Boarding

8.5

Food

8.1

Entertainment

8.2

Overall

8.4

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 ฿33,691, United Airlines can have you in Washington, D.C. Dulles Intl Airport from Bangkok in 39h 43m. 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, United Airlines (฿31,076), เอทิฮัดแอร์เวย์ (฿31,946), and Korean Air (฿32,385) 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, July is the cheapest month in which you can book a flight from Bangkok to Washington, D.C. Dulles Intl Airport (average of ฿31,097). Flying from Bangkok to Washington, D.C. Dulles Intl Airport in January is currently the most expensive (average of ฿36,413). 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 9 April 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest฿31,076Average฿32,534FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
เอทิฮัดแอร์เวย์Cheapest฿31,946Average฿32,331FlexibilityNo cancel feeOn-time75%
Search เอทิฮัดแอร์เวย์ flights
Korean AirCheapest฿32,385Average฿34,926FlexibilityNo cancel feeOn-time81%
Search Korean Air flights
ANACheapest฿33,931Average฿42,623FlexibilityNo 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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