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Cheap flights from Bangkok to Washington, D.C. Dulles Intl Airport from ฿18,369

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 15/3. Fares are subject to change and may not be available on all flights or dates of travel.
BKK — IAD
23 mar. — 30 mar.1
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 21 febrero 2026.

jue. 5/319:30
BKK
-
IAD
1 stop35h 00m
Air China
vie. 6/322:00
IAD
-
BKK
1 stop38h 10m
Air China
Deal found 19/2฿24,419
lun. 23/319:30
BKK
-
IAD
1 stop35h 00m
Multiple Airlines
lun. 30/315:10
IAD
-
BKK
1 stop21h 40m
Multiple Airlines
Deal found 21/2฿28,887
jue. 26/317:55
BKK
-
IAD
2 stops36h 35m
Multiple Airlines
dom. 29/315:10
IAD
-
BKK
1 stop21h 40m
Multiple Airlines
Deal found 19/2฿29,135
jue. 5/319:30
BKK
-
IAD
1 stop35h 00m
Multiple Airlines
mié. 18/311:40
IAD
-
BKK
1 stop20h 45m
Multiple Airlines
Deal found 21/2฿29,290
jue. 5/301:30
BKK
-
IAD
1 stop29h 00m
Multiple Airlines
lun. 9/315:35
IAD
-
BKK
1 stop28h 35m
Multiple Airlines
Deal found 19/2฿29,415
lun. 9/319:30
BKK
-
IAD
1 stop35h 00m
Multiple Airlines
mar. 17/315:35
IAD
-
BKK
1 stop20h 50m
Multiple Airlines
Deal found 20/2฿29,477
mié. 6/513:40
DMK
-
IAD
2 stops55h 05m
Multiple Airlines
dom. 6/913:20
IAD
-
DMK
1 stop39h 30m
Multiple Airlines
Deal found 18/2฿29,663
lun. 4/513:40
DMK
-
IAD
2 stops55h 05m
Multiple Airlines
dom. 6/913:20
IAD
-
DMK
1 stop39h 30m
Multiple Airlines
Deal found 18/2฿29,694
mié. 6/513:40
DMK
-
IAD
2 stops55h 05m
Multiple Airlines
lun. 7/913:20
IAD
-
DMK
1 stop39h 30m
Multiple Airlines
Deal found 18/2฿29,725
lun. 4/513:40
DMK
-
IAD
2 stops55h 05m
Multiple Airlines
lun. 7/913:20
IAD
-
DMK
1 stop39h 30m
Multiple Airlines
Deal found 18/2฿29,756
lun. 4/513:40
DMK
-
IAD
2 stops55h 05m
Multiple Airlines
lun. 31/813:20
IAD
-
DMK
1 stop39h 30m
Multiple Airlines
Deal found 21/2฿29,787
jue. 19/319:30
BKK
-
IAD
1 stop35h 00m
Multiple Airlines
mié. 25/315:35
IAD
-
BKK
1 stop20h 50m
Multiple Airlines
Deal found 19/2฿29,787

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 21 febrero 2026.

Round-trip from

฿24,419

One-way from

฿18,369

Popular in

October

Cheapest in

July

Average price

฿38,164
Air China
  • Air China
  • 5/3-6/3
  • 2 total stops
  • 73h 10m total
  • Bangkok to Washington, D.C.
Search Deals
15/3
  • 15/3
  • 3 total stops
  • 40h 05m total
  • Bangkok to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (฿44,593 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (฿13,957 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 21 febrero 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.

DMK - IAD

DMKIAD

Bangkok Don Mueang Intl

mié. 6/5

13:40-09:45

2 stops55h 05m

Washington, D.C. Dulles Intl

dom. 6/9

13:20-15:50

1 stop39h 30m

฿29,663

BangkokWashington, D.C.

DMK - IAD

DMKIAD

Bangkok Don Mueang Intl

lun. 4/5

13:40-09:45

2 stops55h 05m

Washington, D.C. Dulles Intl

dom. 6/9

13:20-15:50

1 stop39h 30m

฿29,694

BangkokWashington, D.C.

DMK - IAD

DMKIAD

Bangkok Don Mueang Intl

mié. 6/5

13:40-09:45

2 stops55h 05m

Washington, D.C. Dulles Intl

lun. 7/9

13:20-15:50

1 stop39h 30m

฿29,725

BangkokWashington, D.C.

DMK - IAD

DMKIAD

Bangkok Don Mueang Intl

mié. 6/5

13:40-09:45

2 stops55h 05m

Washington, D.C. Dulles Intl

mié. 9/9

13:20-15:50

1 stop39h 30m

฿29,725

BangkokWashington, D.C.

DMK - IAD

DMKIAD

Bangkok Don Mueang Intl

lun. 4/5

13:40-09:45

2 stops55h 05m

Washington, D.C. Dulles Intl

lun. 7/9

13:20-15:50

1 stop39h 30m

฿29,756

BangkokWashington, D.C.

DMK - IAD

DMKIAD

Bangkok Don Mueang Intl

lun. 4/5

13:40-09:45

2 stops55h 05m

Washington, D.C. Dulles Intl

mié. 9/9

13:20-15:50

1 stop39h 30m

฿29,756

BangkokWashington, D.C.

DMK - IAD

DMKIAD

Bangkok Don Mueang Intl

mar. 17/3

23:00-10:05

2 stops46h 05m

Washington, D.C. Dulles Intl

mié. 16/9

13:20-15:50

1 stop39h 30m

฿30,718

BangkokWashington, D.C.

DMK - IAD

DMKIAD

Bangkok Don Mueang Intl

mar. 17/3

23:00-10:05

2 stops46h 05m

Washington, D.C. Dulles Intl

dom. 13/9

13:20-15:50

1 stop39h 30m

฿31,245

BangkokWashington, D.C.

DMK - IAD

DMKIAD

Bangkok Don Mueang Intl

mié. 1/4

23:40-15:40

2 stops27h 00m

Washington, D.C. Dulles Intl

lun. 31/8

13:20-15:50

1 stop39h 30m

฿31,649

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

jue. 7/5

22:45-10:50

1 stop23h 05m

Washington, D.C. Dulles Intl

vie. 11/9

13:20-21:10

1 stop44h 50m

฿32,083

Flights are sorted by cheapest return flights first.

Deals found on 19/2

Showing 1-10 of 44 results
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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 20 February 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, June is the cheapest month in which you can book a flight from Bangkok to Washington, D.C. Dulles Intl Airport (average of ฿28,980). Flying from Bangkok to Washington, D.C. Dulles Intl Airport in January is currently the most expensive (average of ฿35,279). 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.

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 21 febrero 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
1,195 reviews
Check prices

Overall

8.4

Comfort

8.3

Crew

8.7

Entertainment

8.2

Food

8.1

Boarding

8.5

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
1,195 reviews
Korean Air
8.4
Very Good
1,195 reviews
Check prices

Overall

8.4

Comfort

8.3

Crew

8.7

Entertainment

8.2

Food

8.1

Boarding

8.5

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
1,098 reviews
Korean Air
8.4
Very Good
1,195 reviews
Check prices

Overall

8.4

Comfort

8.3

Crew

8.7

Entertainment

8.2

Food

8.1

Boarding

8.5

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
3,739 reviews
Korean Air
8.4
Very Good
1,195 reviews
Check prices

Overall

8.4

Comfort

8.3

Crew

8.7

Entertainment

8.2

Food

8.1

Boarding

8.5

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
9,341 reviews
Korean Air
8.4
Very Good
1,195 reviews
Check prices

Overall

8.4

Comfort

8.3

Crew

8.7

Entertainment

8.2

Food

8.1

Boarding

8.5

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
1,406 reviews
Korean Air
8.4
Very Good
1,195 reviews
Check prices

Overall

8.4

Comfort

8.3

Crew

8.7

Entertainment

8.2

Food

8.1

Boarding

8.5

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 ฿24,419, Air China can have you in Washington, D.C. Dulles Intl Airport from Bangkok in 35h. 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 (฿27,336), United Airlines (฿30,108), and เอทิฮัดแอร์เวย์ (฿30,951) 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 ฿28,980). Flying from Bangkok to Washington, D.C. Dulles Intl Airport in January is currently the most expensive (average of ฿35,279). 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 Baltimore flights
Chiang Mai to Reagan-National flights
Chiang Mai to Dulles Intl 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 21 febrero 2026.
AirlineCheapestAverageFlexibilityOn-time
ซาอุเดียแอร์ไลน์Cheapest฿27,336Average฿30,019FlexibilityNo cancel feeOn-time86%
Search ซาอุเดียแอร์ไลน์ flights
United AirlinesCheapest฿30,108Average฿31,520FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
เอทิฮัดแอร์เวย์Cheapest฿30,951Average฿31,324FlexibilityNo cancel feeOn-time75%
Search เอทิฮัดแอร์เวย์ flights
Korean AirCheapest฿31,376Average฿34,928FlexibilityNo cancel feeOn-time81%
Search Korean Air flights
ANACheapest฿32,874Average฿41,593FlexibilityNo cancel feeOn-time80%
Search ANA flights
Qatar AirwaysCheapest฿34,876Average฿38,420FlexibilityNo 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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