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฿18,678+ 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 19/8. Fares are subject to change and may not be available on all flights or dates of travel.
— IAD
9 Apr — 16 Apr1
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 10 March 2026.

Tue 6/1009:35
BKK
-
IAD
2 stops45h 58m
United Airlines
Sun 1/1122:10
IAD
-
BKK
2 stops49h 15m
United Airlines
Deal found 7/3฿25,522
Thu 27/809:35
BKK
-
IAD
2 stops61h 12m
United Airlines
Thu 10/906:15
IAD
-
BKK
2 stops30h 40m
United Airlines
Deal found 7/3฿25,618
Fri 28/807:00
BKK
-
IAD
2 stops26h 43m
United Airlines
Fri 11/906:15
IAD
-
BKK
2 stops30h 40m
United Airlines
Deal found 10/3฿25,842
Fri 28/809:35
BKK
-
IAD
1 stop41h 15m
United Airlines
Wed 16/908:29
IAD
-
BKK
2 stops28h 26m
United Airlines
Deal found 10/3฿25,970
Fri 3/707:00
BKK
-
IAD
2 stops35h 26m
United Airlines
Sat 25/714:35
IAD
-
BKK
2 stops46h 20m
United Airlines
Deal found 6/3฿26,034
Mon 13/420:50
DMK
-
IAD
2 stops29h 55m
Multiple Airlines
Fri 17/415:10
IAD
-
DMK
2 stops26h 25m
Multiple Airlines
Deal found 9/3฿39,627
Fri 9/1020:20
DMK
-
IAD
2 stops30h 25m
Multiple Airlines
Tue 20/1015:10
IAD
-
DMK
2 stops26h 30m
Multiple Airlines
Deal found 10/3฿41,162
Mon 21/915:25
DMK
-
IAD
2 stops30h 40m
Multiple Airlines
Mon 5/1015:10
IAD
-
DMK
2 stops26h 30m
Multiple Airlines
Deal found 8/3฿42,281
Thu 9/420:50
DMK
-
IAD
2 stops43h 20m
Multiple Airlines
Fri 24/413:20
IAD
-
DMK
1 stop39h 15m
Multiple Airlines
Deal found 9/3฿44,360
Fri 28/820:50
DMK
-
IAD
2 stops29h 55m
Multiple Airlines
Tue 8/915:10
IAD
-
DMK
2 stops26h 30m
Multiple Airlines
Deal found 10/3฿44,744
Fri 28/801:15
DMK
-
IAD
2 stops32h 15m
Multiple Airlines
Sun 20/915:10
IAD
-
DMK
2 stops26h 30m
Multiple Airlines
Deal found 10/3฿44,840
Wed 29/420:50
DMK
-
IAD
2 stops29h 55m
Multiple Airlines
Sat 25/715:10
IAD
-
DMK
2 stops26h 30m
Multiple Airlines
Deal found 10/3฿44,872

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 10 March 2026.

Return from

฿25,618

One-way from

฿18,678

Popular in

August

Cheapest in

October

Average price

฿44,744
United Airlines
  • United Airlines
  • 27/8-10/9
  • 4 total stops
  • 91h 52m total
  • Bangkok to Washington, D.C.
Search Deals
19/8
  • 19/8
  • 3 total stops
  • 38h 08m total
  • Bangkok to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (฿539 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (฿1,004 potential savings vs. average return price).
Search Deals
Average for return flights in March 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 10 March 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 3/7

07:00-07:26

2 stops35h 26m

Washington, D.C. Dulles Intl

Sat 25/7

14:35-23:55

2 stops46h 20m

฿26,034

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sat 2/5

21:40-00:42

2 stops38h 02m

Washington, D.C. Dulles Intl

Mon 29/6

07:10-21:45

2 stops27h 35m

฿33,678

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 27/8

07:00-19:21

2 stops23h 21m

Washington, D.C. Dulles Intl

Mon 21/9

17:42-09:35

3 stops28h 53m

฿35,565
Fastest return journey

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sat 21/3

02:00-16:55

1 stop25h 55m

Washington, D.C. Dulles Intl

Wed 1/4

11:00-19:25

1 stop21h 25m

฿37,868

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 20/4

07:55-11:35

2 stops38h 40m

Washington, D.C. Dulles Intl

Sun 3/5

15:10-23:50

1 stop21h 40m

฿37,932

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 13/4

21:40-23:44

2 stops37h 04m

Washington, D.C. Dulles Intl

Fri 17/4

07:20-13:35

2 stops43h 15m

฿38,795

BangkokWashington, D.C.

DMK - IAD

DMKIAD

Bangkok Don Mueang Intl

Mon 13/4

20:50-15:45

2 stops29h 55m

Washington, D.C. Dulles Intl

Fri 17/4

15:10-04:35

2 stops26h 25m

฿39,627

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 4/5

15:45-07:35

2 stops26h 50m

Washington, D.C. Dulles Intl

Thu 25/6

14:35-09:35

3 stops32h 00m

฿40,650

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 20/4

09:50-23:55

2 stops25h 05m

Washington, D.C. Dulles Intl

Sun 3/5

10:11-23:35

2 stops26h 24m

฿40,714

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 22/4

09:35-00:32

2 stops49h 57m

Washington, D.C. Dulles Intl

Tue 26/5

12:48-09:35

3 stops33h 47m

฿41,738

Flights are sorted by cheapest return flights first.

Deals found on 9/3

Showing 1-10 of 47 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 6 March 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 26 hours 7 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, Korean Air and ANA.

United Airlines
United Airlines
From ฿31,035
Korean Air
Korean Air
From ฿32,342
ANA
ANA
From ฿33,886
Qatar Airways
Qatar Airways
From ฿35,949

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 10 March 2026.
Get a feel of what it's like to fly with Korean Air,ANA, 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
1,202 reviews
Check prices

Entertainment

8.2

Crew

8.7

Comfort

8.3

Food

8.1

Boarding

8.5

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
1,202 reviews
Korean Air
8.4
Very Good
1,202 reviews
Check prices

Entertainment

8.2

Crew

8.7

Comfort

8.3

Food

8.1

Boarding

8.5

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
1,120 reviews
Korean Air
8.4
Very Good
1,202 reviews
Check prices

Entertainment

8.2

Crew

8.7

Comfort

8.3

Food

8.1

Boarding

8.5

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!!
Qatar Airways
7.4
Good
3,744 reviews
Korean Air
8.4
Very Good
1,202 reviews
Check prices

Entertainment

8.2

Crew

8.7

Comfort

8.3

Food

8.1

Boarding

8.5

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
7.4
Good
1,425 reviews
Korean Air
8.4
Very Good
1,202 reviews
Check prices

Entertainment

8.2

Crew

8.7

Comfort

8.3

Food

8.1

Boarding

8.5

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
9,413 reviews
Korean Air
8.4
Very Good
1,202 reviews
Check prices

Entertainment

8.2

Crew

8.7

Comfort

8.3

Food

8.1

Boarding

8.5

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!!

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 50 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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