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฿19,974+ 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 11/5. Fares are subject to change and may not be available on all flights or dates of travel.
— IAD
18 May — 25 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 18 April 2026.

Thu 30/402:30
BKK
-
IAD
1 stop26h 40m
Qatar Airways
Sun 10/521:00
IAD
-
BKK
1 stop22h 50m
Qatar Airways
Deal found 15/4฿35,059
Wed 10/619:45
BKK
-
IAD
1 stop33h 25m
Multiple Airlines
Wed 9/921:00
IAD
-
BKK
1 stop29h 25m
Multiple Airlines
Deal found 16/4฿35,091
Thu 1/1009:35
BKK
-
IAD
2 stops46h 47m
United Airlines
Mon 12/1022:10
IAD
-
BKK
2 stops43h 25m
United Airlines
Deal found 17/4฿35,123
Mon 25/509:50
BKK
-
IAD
2 stops26h 01m
เดลต้า
Wed 16/906:00
IAD
-
BKK
2 stops28h 45m
เดลต้า
Deal found 14/4฿35,219
Mon 1/609:50
BKK
-
IAD
2 stops25h 23m
เดลต้า
Fri 28/807:25
IAD
-
BKK
2 stops27h 20m
เดลต้า
Deal found 16/4฿35,378
Thu 7/521:40
BKK
-
IAD
2 stops37h 35m
เดลต้า
Thu 5/1107:05
IAD
-
BKK
2 stops29h 40m
เดลต้า
Deal found 15/4฿35,410
Fri 25/1223:15
BKK
-
IAD
1 stop22h 35m
Korean Air
Fri 8/111:50
IAD
-
BKK
1 stop23h 30m
Korean Air
Deal found 15/4฿35,442
Thu 7/519:40
BKK
-
IAD
1 stop33h 30m
Qatar Airways
Thu 5/1120:05
IAD
-
BKK
1 stop34h 20m
Qatar Airways
Deal found 15/4฿35,474
Wed 6/501:20
BKK
-
IAD
2 stops33h 49m
Multiple Airlines
Thu 5/1120:05
IAD
-
BKK
1 stop22h 35m
Multiple Airlines
Deal found 15/4฿35,602
Fri 26/609:55
BKK
-
IAD
1 stop40h 45m
Multiple Airlines
Wed 9/921:00
IAD
-
BKK
1 stop28h 55m
Multiple Airlines
Deal found 13/4฿35,666
Wed 22/419:45
BKK
-
IAD
1 stop33h 25m
Qatar Airways
Wed 20/521:00
IAD
-
BKK
1 stop29h 45m
Qatar Airways
Deal found 15/4฿35,698
Wed 13/501:50
BKK
-
IAD
1 stop24h 50m
Multiple Airlines
Fri 29/515:10
IAD
-
BKK
1 stop28h 35m
Multiple Airlines
Deal found 17/4฿35,730

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 18 April 2026.

Return from

฿35,059

One-way from

฿19,974

Popular in

April

Cheapest in

October

Average price

฿59,188
Qatar Airways
  • Qatar Airways
  • 30/4-10/5
  • 2 total stops
  • 49h 30m total
  • Bangkok to Washington, D.C.
Search Deals
11/5
  • 11/5
  • 3 total stops
  • 44h 02m total
  • Bangkok to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (฿7,773 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (฿2,038 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 18 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

Wed 10/6

09:50-00:25

2 stops25h 35m

Washington, D.C. Dulles Intl

Wed 12/8

06:00-21:45

2 stops28h 45m

฿35,410

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Tue 26/5

09:35-11:52

2 stops61h 17m

Washington, D.C. Dulles Intl

Tue 30/6

12:15-04:35

1 stop29h 20m

฿35,410

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 4/5

01:00-18:10

1 stop28h 10m

Washington, D.C. Dulles Intl

Tue 26/5

21:00-13:05

1 stop29h 05m

฿36,401

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

฿36,529

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 24/9

09:55-08:45

1 stop33h 50m

Washington, D.C. Dulles Intl

Mon 28/9

21:00-19:05

1 stop35h 05m

฿37,360

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 1/6

09:50-00:13

2 stops25h 23m

Washington, D.C. Dulles Intl

Fri 28/8

13:30-01:05

1 stop24h 35m

฿38,894

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sun 31/5

02:35-00:13

2 stops32h 38m

Washington, D.C. Dulles Intl

Mon 29/6

08:27-01:05

2 stops29h 38m

฿39,086

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 30/4

01:00-18:10

1 stop28h 10m

Washington, D.C. Dulles Intl

Sat 9/5

21:00-13:25

2 stops29h 25m

฿39,501

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sat 10/10

15:45-07:05

2 stops26h 20m

Washington, D.C. Dulles Intl

Sun 1/11

17:55-11:25

2 stops29h 30m

฿40,236
Fastest return journey

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Fri 22/5

02:30-18:10

1 stop26h 40m

Washington, D.C. Dulles Intl

Sun 7/6

21:00-06:50

1 stop22h 50m

฿41,131

Flights are sorted by cheapest return flights first.

Deals found on 13/4

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 30 hours 32 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 ฿30,895
ANA
ANA
From ฿33,860
Korean Air
Korean Air
From ฿32,318
เอทิฮัดแอร์เวย์
เอทิฮัดแอร์เวย์
From ฿31,879

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 18 April 2026.
Get a feel of what it's like to fly with ANA,Korean Air, 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.
ANA
8.4
Very Good
1,179 reviews
Check prices

Entertainment

8.0

Food

7.8

Overall

8.4

Boarding

8.6

Comfort

8.2

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Alejandro,Apr 2026

SFO - HND

Food was good, not exceptional. On my second flight, Tokyo to Hiroshima, a single cup of coffee was offered, not a bag of pretzels or cookies. Granted, the flight was only an hour and a half, but this seems stingy.
ANA
8.4
Very Good
1,179 reviews
ANA
8.4
Very Good
1,179 reviews
Check prices

Entertainment

8.0

Food

7.8

Overall

8.4

Boarding

8.6

Comfort

8.2

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Alejandro,Apr 2026

SFO - HND

Food was good, not exceptional. On my second flight, Tokyo to Hiroshima, a single cup of coffee was offered, not a bag of pretzels or cookies. Granted, the flight was only an hour and a half, but this seems stingy.
Korean Air
8.4
Very Good
1,209 reviews
ANA
8.4
Very Good
1,179 reviews
Check prices

Entertainment

8.0

Food

7.8

Overall

8.4

Boarding

8.6

Comfort

8.2

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Alejandro,Apr 2026

SFO - HND

Food was good, not exceptional. On my second flight, Tokyo to Hiroshima, a single cup of coffee was offered, not a bag of pretzels or cookies. Granted, the flight was only an hour and a half, but this seems stingy.
United Airlines
7.4
Good
9,603 reviews
ANA
8.4
Very Good
1,179 reviews
Check prices

Entertainment

8.0

Food

7.8

Overall

8.4

Boarding

8.6

Comfort

8.2

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Alejandro,Apr 2026

SFO - HND

Food was good, not exceptional. On my second flight, Tokyo to Hiroshima, a single cup of coffee was offered, not a bag of pretzels or cookies. Granted, the flight was only an hour and a half, but this seems stingy.
เอทิฮัดแอร์เวย์
7.3
Good
1,431 reviews
ANA
8.4
Very Good
1,179 reviews
Check prices

Entertainment

8.0

Food

7.8

Overall

8.4

Boarding

8.6

Comfort

8.2

Crew

8.7

Reviews

1 / 20
8.0
Excellent

Alejandro,Apr 2026

SFO - HND

Food was good, not exceptional. On my second flight, Tokyo to Hiroshima, a single cup of coffee was offered, not a bag of pretzels or cookies. Granted, the flight was only an hour and a half, but this seems stingy.

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 (29 hours 35 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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