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฿20,487+ 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 30/10. Fares are subject to change and may not be available on all flights or dates of travel.
— IAD
5 Aug — 12 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 6 July 2026.

Thu 9/707:45
BKK
-
IAD
2 stops33h 37m
แอร์แคนาดา
Thu 23/709:55
IAD
-
BKK
2 stops25h 00m
แอร์แคนาดา
Deal found 2/7฿34,875
Sun 30/822:45
BKK
-
IAD
1 stop23h 05m
Multiple Airlines
Tue 8/915:10
IAD
-
BKK
1 stop34h 00m
Multiple Airlines
Deal found 5/7฿35,206
Thu 17/907:45
BKK
-
IAD
2 stops23h 40m
แอร์แคนาดา
Mon 21/908:29
IAD
-
BKK
1 stop33h 36m
แอร์แคนาดา
Deal found 2/7฿35,306
Thu 27/822:45
BKK
-
IAD
1 stop23h 05m
AIR PREMIA
Fri 28/813:20
IAD
-
BKK
1 stop44h 50m
AIR PREMIA
Deal found 5/7฿35,836
Tue 21/707:45
BKK
-
IAD
2 stops38h 27m
แอร์แคนาดา
Tue 28/722:14
IAD
-
BKK
2 stops43h 51m
แอร์แคนาดา
Deal found 3/7฿36,002
Thu 17/922:45
BKK
-
IAD
1 stop23h 05m
Multiple Airlines
Mon 21/915:10
IAD
-
BKK
1 stop28h 35m
Multiple Airlines
Deal found 2/7฿36,068
Fri 3/707:00
BKK
-
IAD
2 stops34h 22m
แอร์แคนาดา
Sat 25/716:20
IAD
-
BKK
2 stops25h 45m
แอร์แคนาดา
Deal found 2/7฿36,499
Thu 16/715:25
BKK
-
IAD
1 stop35h 20m
ซาอุเดียแอร์ไลน์
Sun 19/718:50
IAD
-
BKK
1 stop31h 55m
ซาอุเดียแอร์ไลน์
Deal found 2/7฿36,532
Wed 8/713:10
BKK
-
IAD
2 stops28h 29m
Multiple Airlines
Wed 29/713:20
IAD
-
BKK
1 stop44h 50m
Multiple Airlines
Deal found 2/7฿36,665
Thu 27/807:55
BKK
-
IAD
2 stops32h 45m
Multiple Airlines
Fri 28/813:20
IAD
-
BKK
1 stop44h 50m
Multiple Airlines
Deal found 5/7฿36,698
Tue 29/912:10
DMK
-
IAD
1 stop31h 30m
Emirates
Sat 3/1010:55
IAD
-
DMK
1 stop37h 15m
Emirates
Deal found 1/7฿48,798
Thu 17/912:10
DMK
-
IAD
1 stop31h 30m
Emirates
Mon 21/910:55
IAD
-
DMK
1 stop37h 15m
Emirates
Deal found 5/7฿49,262

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 6 July 2026.

Return from

฿35,206

One-way from

฿20,487

Popular in

April

Cheapest in

October

Average price

฿35,969
เอทิฮัดแอร์เวย์
  • เอทิฮัดแอร์เวย์
  • 30/8-8/9
  • 2 total stops
  • 57h 05m total
  • Bangkok to Washington, D.C.
Search Deals
ซาอุเดียแอร์ไลน์
  • ซาอุเดียแอร์ไลน์
  • 30/10
  • 1 total stop
  • 34h 25m total
  • Bangkok to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (฿7,769 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (฿2,094 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 6 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 27/8

09:35-13:55

2 stops39h 20m

Washington, D.C. Dulles Intl

Fri 28/8

17:42-09:35

2 stops28h 53m

฿36,864

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sun 18/10

15:45-11:55

3 stops31h 10m

Washington, D.C. Dulles Intl

Thu 29/10

13:20-11:30

2 stops35h 10m

฿37,991

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 16/7

09:35-15:50

1 stop41h 15m

Washington, D.C. Dulles Intl

Sun 19/7

15:39-09:35

3 stops30h 56m

฿38,157

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Mon 3/8

09:35-06:20

2 stops31h 45m

Washington, D.C. Dulles Intl

Mon 10/8

13:15-09:35

3 stops33h 20m

฿44,555

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Wed 19/8

15:45-00:32

3 stops43h 47m

Washington, D.C. Dulles Intl

Wed 18/11

06:05-00:20

2 stops30h 15m

฿45,350

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sun 2/8

09:35-11:52

2 stops61h 17m

Washington, D.C. Dulles Intl

Sun 9/8

08:40-09:35

3 stops37h 55m

฿47,571

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Sat 25/7

15:45-15:50

2 stops35h 05m

Washington, D.C. Dulles Intl

Sat 15/8

15:40-09:35

3 stops30h 55m

฿47,704

BangkokWashington, D.C.

DMK - IAD

DMKIAD

Bangkok Don Mueang Intl

Tue 29/9

12:10-08:40

1 stop31h 30m

Washington, D.C. Dulles Intl

Sat 3/10

10:55-11:10

1 stop37h 15m

฿48,798

BangkokWashington, D.C.

BKK - IAD

BKKIAD

Bangkok Suvarnabhumi

Thu 20/8

02:35-23:59

2 stops32h 24m

Washington, D.C. Dulles Intl

Sun 27/12

18:59-23:20

2 stops40h 21m

฿50,091

BangkokWashington, D.C.

DMK - IAD

DMKIAD

Bangkok Don Mueang Intl

Wed 19/8

13:30-08:40

1 stop30h 10m

Washington, D.C. Dulles Intl

Wed 18/11

10:30-10:00

1 stop35h 30m

฿54,367

Flights are sorted by cheapest return flights first.

Deals found on 1/7

Showing 1-10 of 40 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 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, Korean Air and เอทิฮัดแอร์เวย์.

United Airlines
United Airlines
From ฿27,123
Korean Air
Korean Air
From ฿33,426
เอทิฮัดแอร์เวย์
เอทิฮัดแอร์เวย์
From ฿33,068

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 6 July 2026.
Get a feel of what it's like to fly with Korean Air,United Airlines, andเอทิฮัดแอร์เวย์ 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

Boarding

8.5

Food

8.1

Overall

8.4

Comfort

8.3

Crew

8.7

Entertainment

8.2

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

Boarding

8.5

Food

8.1

Overall

8.4

Comfort

8.3

Crew

8.7

Entertainment

8.2

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
9,940 reviews
Korean Air
8.4
Very Good
1,221 reviews
Check prices

Boarding

8.5

Food

8.1

Overall

8.4

Comfort

8.3

Crew

8.7

Entertainment

8.2

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
1,476 reviews
Korean Air
8.4
Very Good
1,221 reviews
Check prices

Boarding

8.5

Food

8.1

Overall

8.4

Comfort

8.3

Crew

8.7

Entertainment

8.2

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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It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights to Dulles Intl.

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Need flexible booking options for your flight to Dulles Intl ? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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