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฿21,306+ Cheap flights to Dulles Intl

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.
— IAD
24 Aug — 31 Aug1
1 adult
1 adult, Economy, 0 bags

Flights to Dulles Intl in 2026

Enter your travel dates to find the best prices.

Cheapest flights to Dulles Intl Airport
Explore the most affordable flight options available to Dulles Intl Airport. Find the lowest fares based on data from user searches, with prices last updated on 25 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฿27,981
Tue 22/915:25
BKK
-
IAD
1 stop35h 20m
ซาอุเดียแอร์ไลน์
Sun 18/1018:50
IAD
-
BKK
1 stop31h 55m
ซาอุเดียแอร์ไลน์
Deal found 22/7฿32,498
Mon 7/909:35
BKK
-
IAD
1 stop35h 30m
United Airlines
Mon 14/906:13
IAD
-
BKK
2 stops35h 22m
United Airlines
Deal found 24/7฿34,150
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฿34,184
Tue 20/1009:35
BKK
-
IAD
1 stop35h 30m
United Airlines
Sun 25/1006:11
IAD
-
BKK
2 stops35h 59m
United Airlines
Deal found 24/7฿34,251
Mon 5/1009:35
BKK
-
IAD
1 stop35h 30m
United Airlines
Mon 19/1006:10
IAD
-
BKK
2 stops29h 05m
United Airlines
Deal found 23/7฿34,285
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฿34,319
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฿34,352
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฿47,972
Thu 17/912:10
DMK
-
IAD
1 stop31h 30m
Emirates
Sun 20/910:55
IAD
-
DMK
1 stop22h 50m
Emirates
Deal found 24/7฿49,051
Wed 28/1022:55
DMK
-
IAD
1 stop45h 05m
Emirates
Sun 8/1110:30
IAD
-
DMK
1 stop35h 30m
Emirates
Deal found 23/7฿49,118
Sun 13/923:55
DMK
-
IAD
1 stop43h 45m
Emirates
Sat 26/910:55
IAD
-
DMK
1 stop37h 15m
Emirates
Deal found 20/7฿49,186

Find flight deals to Dulles Intl Airport

Find the latest flights to Dulles Intl in 2026, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 17,341 searches and data was last updated on 25 July 2026.

Return from

฿27,981

One-way from

฿21,306

Popular in

April

Cheapest in

October

Average price

฿45,140
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
Highest demand for flights based on searches. 11% potential increase in price (฿5,415 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (฿1,880 potential savings vs. average return price).
Search Deals
Average for return flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Locate flights to Dulles Intl that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 17,341 searches and data was last updated on 25 July 2026.
Use the filters below to find and compare flights to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Route

Depart

Return

Price

Cheapest return flight

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 17/9

09:35-10:05

1 stop35h 30m

Washington, D.C. Dulles Intl

Sun 20/9

13:10-09:35

3 stops33h 25m

฿34,319

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

฿34,319

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 19/11

09:10-16:18

2 stops43h 08m

Washington, D.C. Dulles Intl

Mon 23/11

17:56-11:30

2 stops29h 34m

฿34,453

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Fri 20/11

07:10-11:46

2 stops40h 36m

Washington, D.C. Dulles Intl

Mon 23/11

06:40-11:30

2 stops40h 50m

฿35,802

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

฿36,341

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 19/11

18:55-08:10

1 stop25h 15m

Washington, D.C. Dulles Intl

Mon 23/11

20:05-12:15

1 stop28h 10m

฿39,578
Fastest return journey

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sat 19/12

18:55-08:30

1 stop25h 35m

Washington, D.C. Dulles Intl

Fri 15/1

20:05-06:15

1 stop22h 10m

฿39,578

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

฿39,982

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sat 19/12

14:20-09:10

1 stop30h 50m

Washington, D.C. Dulles Intl

Fri 15/1

08:35-00:20

2 stops27h 45m

฿40,488

BangkokWashington, D.C.

DMK - IAD

DMKIAD

Bangkok Don Mueang Intl

Thu 17/9

12:10-08:40

1 stop31h 30m

Washington, D.C. Dulles Intl

Sun 20/9

10:55-20:45

1 stop22h 50m

฿49,152

Flights are sorted by cheapest return flights first.

Deals found on 24/7

Showing 1-10 of 37 resultsSorted by cheapest first
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Best time to book a flight to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl 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 to Washington, D.C. Dulles Intl Airport

How long is the flight to Dulles Intl?

On average, a flight from Bangkok to Dulles Intl takes 26 hours 55 minutes. Flights to Dulles Intl from other popular cities in Thailand will vary in length. Below are a few examples of popular routes and their flight times.

What are the most popular airlines that fly to Dulles Intl?

The most popular airlines flying from Bangkok to Dulles Intl are United Airlines, เอทิฮัดแอร์เวย์ and Korean Air.

United Airlines
United Airlines
From ฿27,582
เอทิฮัดแอร์เวย์
เอทิฮัดแอร์เวย์
From ฿33,628
Korean Air
Korean Air
From ฿33,991
Qatar Airways
Qatar Airways
From ฿37,893

What are the cheapest airlines that fly to Dulles Intl?

The cheapest airlines flying from Bangkok to Dulles Intl are United Airlines, เอทิฮัดแอร์เวย์ and Korean Air.

Rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Dulles Intl ranges from 66.0 - 102.0 mm per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Dulles Intl when rainfall is around 66.0 mm.

Temperature in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Dulles Intl, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

When is the best time to book a flight to Dulles Intl?

To ensure you get the cheapest price possible for a flight to Dulles Intl, you should look to book at least 90 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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 25 July 2026.
Get a feel of what it's like to fly with Korean Air,United Airlines, andQatar Airways to the United States by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very Good
1,221 reviews
Check prices

Food

8.1

Crew

8.7

Overall

8.4

Entertainment

8.2

Boarding

8.5

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

Food

8.1

Crew

8.7

Overall

8.4

Entertainment

8.2

Boarding

8.5

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
10,032 reviews
Korean Air
8.4
Very Good
1,221 reviews
Check prices

Food

8.1

Crew

8.7

Overall

8.4

Entertainment

8.2

Boarding

8.5

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

Food

8.1

Crew

8.7

Overall

8.4

Entertainment

8.2

Boarding

8.5

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

Food

8.1

Crew

8.7

Overall

8.4

Entertainment

8.2

Boarding

8.5

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!!

FAQs about flying to Dulles Intl

  • Can I find cheaper flights to Dulles Intl if I am willing to have stopovers?

    Yes, flights with stopovers are often cheaper than direct flights. Keep an eye out for flight deals to Dulles Intl on Cheapflights that require 1 or 2 stops for potential cost savings.

  • What is the best airline to fly to Dulles Intl?

    Based on reviews from Cheapflights users, United Airlines is rated the highest out of the airlines that fly to Dulles Intl.

  • Where does the fastest flight to Dulles Intl depart from?

    For those looking to save time traveling to Dulles Intl, Bangkok offers the quickest one-way flight (23 hours 40 minutes).

  • Does Washington, D.C. Dulles Intl have rental cars?

    Yes. Those touching down at Washington, D.C. Dulles Intl can take advantage of the car hire services offered upon their arrival.

  • Are there hotels close to Washington, D.C. Dulles Intl?

    Yes. Washington, D.C. Dulles Intl has hotels nearby for those requiring accommodations. Sleepbox Lounge Iad, Dulles International Airport is the closest property to Washington, D.C. Dulles Intl (0.0 km away from Washington, D.C. Dulles Intl).

See more FAQs

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