Find flights
Airlines

฿20,101+ Cheap flights to Dulles Intl

— IAD
21 Sep — 28 Sep1
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

Tue 15/915:25 -
1 stop35h 20m
Fri 25/918:50 -
1 stop31h 55m
Deal found 19/8฿24,644
Sun 4/1015:25 -
1 stop35h 20m
Sun 11/1018:50 -
1 stop31h 55m
Deal found 20/8฿24,775
Mon 2/1115:20 -
1 stop34h 30m
Fri 6/1117:50 -
1 stop31h 50m
Deal found 21/8฿24,840
Sat 19/1215:20 -
1 stop35h 25m
Fri 15/117:50 -
1 stop31h 50m
Deal found 19/8฿28,827
Sat 26/1215:20 -
1 stop35h 25m
Fri 8/117:50 -
1 stop31h 50m
Deal found 21/8฿29,187
Sun 20/915:25 -
1 stop35h 20m
Sun 25/1018:50 -
1 stop31h 50m
Deal found 20/8฿31,409
Sat 10/1003:15 -
1 stop41h 30m
Wed 3/314:35 -
1 stop39h 25m
Deal found 17/8฿32,259
Thu 17/915:25 -
1 stop35h 20m
Thu 24/915:10 -
1 stop34h 00m
Deal found 20/8฿32,325
Tue 10/1120:50 -
1 stop24h 15m
Tue 17/1114:35 -
1 stop39h 25m
Deal found 19/8฿32,455
Sat 19/915:30 -
2 stops29h 15m
Wed 7/1015:10 -
2 stops26h 10m
Deal found 19/8฿46,346
Mon 2/1123:00 -
1 stop45h 10m
Fri 6/1110:30 -
1 stop21h 40m
Deal found 21/8฿46,902
Mon 21/1208:55 -
1 stop35h 15m
Tue 19/110:30 -
1 stop33h 25m
Deal found 21/8฿47,948

Find flight deals to Dulles Intl Airport

Return from

฿24,644

One-way from

฿20,101

Popular in

August

Cheapest in

October

Average price

฿68,963
ซาอุเ�ดียแอร์ไลน์
  • ซาอุเดียแอร์ไลน์
  • 15/9-25/9
  • 2 total stops
  • 67h 15m total
  • Bangkok to Washington, D.C.
Search Deals
10/9
  • 10/9
  • 3 total stops
  • 36h 25m total
  • Bangkok to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (฿7,535 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (฿2,590 potential savings vs. average return price).
Search Deals
Average for return flights in August 2026
Search Deals

Cheapflights Fare Finder

 
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 Bangkok Suvarnabhumi - IAD Washington, D.C. Dulles Intl

BKKIAD

Bangkok Suvarnabhumi

Tue 8/9

09:35-06:34

2 stops31h 59m

Washington, D.C. Dulles Intl

Sun 25/10

08:23-05:10

2 stops33h 47m

฿33,861

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - IAD Washington, D.C. Dulles Intl

BKKIAD

Bangkok Suvarnabhumi

Mon 21/12

16:55-11:54

3 stops30h 59m

Washington, D.C. Dulles Intl

Tue 19/1

22:10-11:30

2 stops49h 20m

฿34,416

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - IAD Washington, D.C. Dulles Intl

BKKIAD

Bangkok Suvarnabhumi

Fri 5/2

08:30-09:05

1 stop36h 35m

Washington, D.C. Dulles Intl

Sun 7/2

14:35-06:35

1 stop28h 00m

฿34,449
Fastest return journey

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - IAD Washington, D.C. Dulles Intl

BKKIAD

Bangkok Suvarnabhumi

Sat 19/12

09:40-23:51

2 stops26h 11m

Washington, D.C. Dulles Intl

Wed 6/1

07:30-21:30

2 stops26h 00m

฿37,815

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - IAD Washington, D.C. Dulles Intl

BKKIAD

Bangkok Suvarnabhumi

Mon 7/9

09:35-15:35

1 stop41h 00m

Washington, D.C. Dulles Intl

Sun 25/10

06:39-05:10

2 stops35h 31m

฿37,848

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - IAD Washington, D.C. Dulles Intl

BKKIAD

Bangkok Suvarnabhumi

Fri 4/9

09:15-09:45

1 stop35h 30m

Washington, D.C. Dulles Intl

Sun 25/10

15:35-18:00

1 stop39h 25m

฿38,600

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - IAD Washington, D.C. Dulles Intl

BKKIAD

Bangkok Suvarnabhumi

Sun 13/9

21:40-11:05

1 stop24h 25m

Washington, D.C. Dulles Intl

Sun 27/12

06:00-13:25

2 stops43h 25m

฿40,986

BangkokWashington, D.C.

DMK Bangkok Don Mueang Intl - IAD Washington, D.C. Dulles Intl

DMKIAD

Bangkok Don Mueang Intl

Mon 7/9

23:55-08:50

1 stop43h 55m

Washington, D.C. Dulles Intl

Sun 25/10

11:15-20:10

1 stop21h 55m

฿48,176

BangkokWashington, D.C.

DMK Bangkok Don Mueang Intl - IAD Washington, D.C. Dulles Intl

DMKIAD

Bangkok Don Mueang Intl

Sun 6/9

23:55-08:50

1 stop43h 55m

Washington, D.C. Dulles Intl

Sun 25/10

11:15-20:10

1 stop21h 55m

฿48,176

BangkokWashington, D.C.

DMK Bangkok Don Mueang Intl - IAD Washington, D.C. Dulles Intl

DMKIAD

Bangkok Don Mueang Intl

Wed 9/9

13:30-08:50

1 stop30h 20m

Washington, D.C. Dulles Intl

Sun 25/10

11:15-20:10

1 stop21h 55m

฿48,176

Flights are sorted by cheapest return flights first.

Deals found on 20/8

Showing 1-10 of 35 resultsSorted by cheapest first
1
2
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

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 27 hours 17 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, เอทิฮัดแอร์เวย์ and Korean Air.

United Airlines
United Airlines
From ฿26,452
เอทิฮัดแอร์เวย์
เอทิฮัดแอร์เวย์
From ฿32,603
Korean Air
Korean Air
From ฿32,955

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

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

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 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

Food

8.1

Boarding

8.5

Comfort

8.3

Crew

8.7

Entertainment

8.2

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

Food

8.1

Boarding

8.5

Comfort

8.3

Crew

8.7

Entertainment

8.2

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
10,112 reviews
Korean Air
8.4
Very Good
1,221 reviews
Check prices

Food

8.1

Boarding

8.5

Comfort

8.3

Crew

8.7

Entertainment

8.2

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
7.3
Good
1,508 reviews
Korean Air
8.4
Very Good
1,221 reviews
Check prices

Food

8.1

Boarding

8.5

Comfort

8.3

Crew

8.7

Entertainment

8.2

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 (24 hours 15 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

Browse thousands of different options on Cheapflights for your next trip

Search flights to Dulles Intl by cabin class

First Class flights to Washington, D.C. Dulles Intl Airport
Business Class flights to Washington, D.C. Dulles Intl Airport
Prem Economy Class flights to Washington, D.C. Dulles Intl Airport
Economy Class flights to Washington, D.C. Dulles Intl Airport

Fly with Cheapflights

How does Cheapflights help users find flights to Dulles Intl?

Cheapflights helps you search for flights to Dulles Intl via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets to Dulles Intl?

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.

Can Cheapflights find flights to Dulles Intl with no change fees?

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.

Can Cheapflights notify me if prices for flights to Dulles Intl become cheaper?

Yes, and it’s super simple to set up Price Alerts. Click the bell icon next to the flight deals above and provide your email address. That’s it!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book With Flexibility

Our users can plan ahead with confidence and find flights with no change fees.

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.