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฿19,441+ 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 25/5. Fares are subject to change and may not be available on all flights or dates of travel.
— IAD
12 May — 19 May1
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 12 April 2026.

Thu 1/1009:35
BKK
-
IAD
2 stops45h 58m
United Airlines
Mon 5/1012:35
IAD
-
BKK
1 stop29h 00m
United Airlines
Deal found 7/4฿25,933
Mon 1/619:35
BKK
-
IAD
1 stop34h 55m
Multiple Airlines
Fri 28/821:00
IAD
-
BKK
1 stop29h 25m
Multiple Airlines
Deal found 8/4฿33,095
Mon 1/609:50
BKK
-
IAD
2 stops25h 23m
เดลต้า
Fri 28/807:25
IAD
-
BKK
2 stops27h 20m
เดลต้า
Deal found 8/4฿35,014
Tue 9/609:50
BKK
-
IAD
2 stops25h 35m
เดลต้า
Tue 13/1007:30
IAD
-
BKK
2 stops29h 05m
เดลต้า
Deal found 9/4฿35,589
Tue 23/609:55
BKK
-
IAD
1 stop40h 45m
Multiple Airlines
Tue 8/915:10
IAD
-
BKK
1 stop40h 00m
Multiple Airlines
Deal found 10/4฿35,621
Wed 10/609:50
BKK
-
IAD
2 stops25h 35m
เดลต้า
Wed 12/807:00
IAD
-
BKK
2 stops29h 35m
เดลต้า
Deal found 12/4฿35,653
Fri 29/502:30
BKK
-
IAD
1 stop26h 40m
Qatar Airways
Sun 30/811:05
IAD
-
BKK
1 stop21h 00m
Qatar Airways
Deal found 8/4฿35,685
Thu 30/402:30
BKK
-
IAD
1 stop26h 40m
Qatar Airways
Sat 9/521:00
IAD
-
BKK
1 stop29h 05m
Qatar Airways
Deal found 9/4฿35,717
Mon 29/609:55
BKK
-
IAD
1 stop33h 50m
Qatar Airways
Wed 16/911:05
IAD
-
BKK
1 stop21h 00m
Qatar Airways
Deal found 10/4฿35,749
Wed 29/419:45
BKK
-
IAD
1 stop33h 25m
Qatar Airways
Wed 27/521:00
IAD
-
BKK
1 stop29h 05m
Qatar Airways
Deal found 11/4฿35,781
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฿41,793
Sun 7/620:25
DMK
-
IAD
2 stops32h 45m
Multiple Airlines
Sun 26/715:10
IAD
-
DMK
2 stops26h 30m
Multiple Airlines
Deal found 12/4฿43,359

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 12 April 2026.

Return from

฿25,933

One-way from

฿19,441

Popular in

April

Cheapest in

October

Average price

฿59,220
United Airlines
  • United Airlines
  • 1/10-5/10
  • 3 total stops
  • 74h 58m total
  • Bangkok to Washington, D.C.
Search Deals
แอร์แคนาดา
  • แอร์แคนาดา
  • 25/5
  • 2 total stops
  • 49h 08m total
  • Bangkok to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (฿7,777 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (฿2,039 potential savings vs. average return price).
Search Deals
Average for return flights in April 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 12 April 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

Fri 26/6

09:55-15:40

1 stop40h 45m

Washington, D.C. Dulles Intl

Wed 9/9

11:05-19:05

1 stop21h 00m

฿35,685

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 29/6

07:00-21:00

2 stops25h 00m

Washington, D.C. Dulles Intl

Mon 7/9

17:41-09:35

3 stops28h 54m

฿36,165

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Tue 5/5

02:30-18:10

1 stop26h 40m

Washington, D.C. Dulles Intl

Wed 13/5

21:00-13:05

1 stop29h 05m

฿36,325

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 25/6

07:00-21:00

2 stops25h 00m

Washington, D.C. Dulles Intl

Sat 11/7

06:33-04:35

2 stops35h 02m

฿36,613

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Tue 7/7

07:00-21:01

2 stops25h 01m

Washington, D.C. Dulles Intl

Mon 13/7

20:18-09:35

2 stops26h 17m

฿39,043

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 25/6

07:00-21:00

2 stops25h 00m

Washington, D.C. Dulles Intl

Sun 5/7

12:15-04:35

1 stop29h 20m

฿39,714

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sun 10/5

02:30-18:10

1 stop26h 40m

Washington, D.C. Dulles Intl

Mon 25/5

21:00-14:00

2 stops30h 00m

฿39,906

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Fri 26/6

07:00-21:00

2 stops25h 00m

Washington, D.C. Dulles Intl

Mon 6/7

08:25-04:35

2 stops33h 10m

฿40,034

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 6/5

19:45-18:10

2 stops33h 25m

Washington, D.C. Dulles Intl

Wed 13/5

21:00-13:05

1 stop29h 05m

฿40,226

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Fri 24/4

19:45-18:10

1 stop33h 25m

Washington, D.C. Dulles Intl

Mon 27/4

21:00-14:00

2 stops30h 00m

฿40,961

Flights are sorted by cheapest return flights first.

Deals found on 10/4

Showing 1-10 of 42 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

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

Use this chart to determine the optimal time to book a return flight from Bangkok to Dulles Intl. Price data was last updated on 10 April 2026.

To ensure you get the cheapest price possible for a flight to Dulles Intl, you should look to book at least 81 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.

How long is the flight to Dulles Intl?

On average, a flight from Bangkok to Dulles Intl takes 24 hours 37 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, ANA and Korean Air.

United Airlines
United Airlines
From ฿31,028
ANA
ANA
From ฿33,879
Korean Air
Korean Air
From ฿32,335
เอทิฮัดแอร์เวย์
เอทิฮัดแอร์เวย์
From ฿31,896

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).

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 12 April 2026.
Get a feel of what it's like to fly with Korean Air,ANA, andUnited Airlines 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
1,204 reviews
Check prices

Food

8.1

Comfort

8.3

Overall

8.4

Crew

8.7

Entertainment

8.2

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
1,204 reviews
Korean Air
8.4
Very Good
1,204 reviews
Check prices

Food

8.1

Comfort

8.3

Overall

8.4

Crew

8.7

Entertainment

8.2

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
1,171 reviews
Korean Air
8.4
Very Good
1,204 reviews
Check prices

Food

8.1

Comfort

8.3

Overall

8.4

Crew

8.7

Entertainment

8.2

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
9,575 reviews
Korean Air
8.4
Very Good
1,204 reviews
Check prices

Food

8.1

Comfort

8.3

Overall

8.4

Crew

8.7

Entertainment

8.2

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
1,429 reviews
Korean Air
8.4
Very Good
1,204 reviews
Check prices

Food

8.1

Comfort

8.3

Overall

8.4

Crew

8.7

Entertainment

8.2

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!!

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, Chiang Mai offers the quickest one-way flight (21 hours 55 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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