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฿20,451+ 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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
— IAD
9 Jul — 16 Jul1
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 9 June 2026.

Sun 20/915:25
BKK
-
IAD
1 stop35h 20m
ซาอุเดียแอร์ไลน์
Sun 27/918:50
IAD
-
BKK
1 stop31h 55m
ซาอุเดียแอร์ไลน์
Deal found 9/6฿29,774
Sun 20/915:45
BKK
-
IAD
3 stops38h 38m
United Airlines
Sun 27/922:13
IAD
-
BKK
2 stops48h 22m
United Airlines
Deal found 9/6฿29,807
Tue 9/609:35
BKK
-
IAD
1 stop41h 15m
United Airlines
Tue 16/606:33
IAD
-
BKK
2 stops35h 02m
United Airlines
Deal found 7/6฿30,791
Thu 11/609:35
BKK
-
IAD
1 stop41h 15m
United Airlines
Thu 18/608:29
IAD
-
BKK
2 stops28h 26m
United Airlines
Deal found 5/6฿30,857
Wed 10/607:00
BKK
-
IAD
2 stops25h 00m
United Airlines
Wed 9/912:15
IAD
-
BKK
1 stop29h 20m
United Airlines
Deal found 5/6฿31,054
Tue 7/709:35
BKK
-
IAD
1 stop41h 15m
United Airlines
Wed 22/722:29
IAD
-
BKK
2 stops38h 26m
United Airlines
Deal found 8/6฿31,284
Thu 25/609:35
BKK
-
IAD
2 stops50h 10m
United Airlines
Wed 15/717:42
IAD
-
BKK
2 stops43h 13m
United Airlines
Deal found 8/6฿31,317
Mon 14/923:50
DMK
-
IAD
1 stop43h 50m
Emirates
Tue 10/1110:30
IAD
-
DMK
1 stop35h 30m
Emirates
Deal found 9/6฿48,584
Mon 14/923:50
DMK
-
IAD
1 stop43h 50m
Emirates
Mon 9/1110:30
IAD
-
DMK
1 stop21h 45m
Emirates
Deal found 8/6฿48,780
Fri 25/912:10
DMK
-
IAD
1 stop31h 30m
Emirates
Tue 10/1110:30
IAD
-
DMK
1 stop21h 45m
Emirates
Deal found 9/6฿49,240
Fri 3/723:50
DMK
-
IAD
1 stop43h 50m
Emirates
Fri 9/1010:55
IAD
-
DMK
1 stop22h 50m
Emirates
Deal found 5/6฿50,126
Fri 10/723:50
DMK
-
IAD
1 stop43h 50m
Emirates
Fri 25/910:55
IAD
-
DMK
1 stop22h 50m
Emirates
Deal found 4/6฿50,159

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 9 June 2026.

Return from

฿29,774

One-way from

฿20,451

Popular in

April

Cheapest in

October

Average price

฿35,781
ซาอุเดียแอร์ไลน์
  • ซาอุเดียแอร์ไลน์
  • 20/9-27/9
  • 2 total stops
  • 67h 15m total
  • Bangkok to Washington, D.C.
Search Deals
AIR PREMIA
  • AIR PREMIA
  • 1/9
  • 1 total stop
  • 23h 05m total
  • Bangkok to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (฿8,418 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (฿2,146 potential savings vs. average return price).
Search Deals
Average for return flights in June 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 9 June 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 10/7

09:35-07:22

2 stops56h 47m

Washington, D.C. Dulles Intl

Fri 25/9

17:42-09:35

2 stops28h 53m

฿31,284

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Tue 15/9

09:35-07:19

2 stops56h 44m

Washington, D.C. Dulles Intl

Tue 10/11

10:08-05:10

2 stops31h 02m

฿31,349

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 14/9

15:45-11:26

3 stops30h 41m

Washington, D.C. Dulles Intl

Mon 9/11

10:08-05:10

2 stops31h 02m

฿31,645

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Fri 26/6

07:00-21:00

2 stops25h 00m

Washington, D.C. Dulles Intl

Mon 13/7

07:00-09:35

2 stops39h 35m

฿37,225

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Fri 26/6

07:00-00:55

2 stops28h 55m

Washington, D.C. Dulles Intl

Wed 15/7

20:00-09:35

2 stops26h 35m

฿37,521

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 22/7

09:35-14:12

2 stops39h 37m

Washington, D.C. Dulles Intl

Mon 18/1

11:10-05:10

1 stop30h 00m

฿39,622

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 22/7

09:35-14:12

2 stops39h 37m

Washington, D.C. Dulles Intl

Thu 12/11

06:30-00:20

2 stops29h 50m

฿39,720

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Fri 26/6

20:00-08:45

1 stop23h 45m

Washington, D.C. Dulles Intl

Sun 12/7

21:00-13:25

1 stop29h 25m

฿40,968

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sat 20/6

23:40-14:20

2 stops25h 40m

Washington, D.C. Dulles Intl

Sun 28/6

17:25-14:50

1 stop34h 25m

฿42,609

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 22/6

20:00-08:45

1 stop23h 45m

Washington, D.C. Dulles Intl

Fri 17/7

21:00-13:25

1 stop29h 25m

฿43,069

Flights are sorted by cheapest return flights first.

Deals found on 8/6

Showing 1-10 of 40 resultsSorted by cheapest first
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3
4

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 28 hours 15 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 ฿31,734
Korean Air
Korean Air
From ฿33,099
ANA
ANA
From ฿34,679
เอทิฮัดแอร์เวย์
เอทิฮัดแอร์เวย์
From ฿32,745

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 17 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 9 June 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
1,218 reviews
Check prices

Crew

8.7

Entertainment

8.2

Comfort

8.3

Overall

8.4

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
1,218 reviews
Korean Air
8.4
Very Good
1,218 reviews
Check prices

Crew

8.7

Entertainment

8.2

Comfort

8.3

Overall

8.4

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
8.3
Very Good
1,229 reviews
Korean Air
8.4
Very Good
1,218 reviews
Check prices

Crew

8.7

Entertainment

8.2

Comfort

8.3

Overall

8.4

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
3,729 reviews
Korean Air
8.4
Very Good
1,218 reviews
Check prices

Crew

8.7

Entertainment

8.2

Comfort

8.3

Overall

8.4

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
9,800 reviews
Korean Air
8.4
Very Good
1,218 reviews
Check prices

Crew

8.7

Entertainment

8.2

Comfort

8.3

Overall

8.4

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
1,452 reviews
Korean Air
8.4
Very Good
1,218 reviews
Check prices

Crew

8.7

Entertainment

8.2

Comfort

8.3

Overall

8.4

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!!

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 (25 hours 0 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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