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฿3,449+ Cheap flights from Washington, D.C. Dulles Intl Airport

This is the cheapest return flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
IAD — BKK
7 Mar — 14 Mar1
1 adult
1 adult, Economy, 0 bags

What to know about flights from Dulles Intl

Discover essential information about flights departing from Dulles Intl, including flight schedules, destinations, airlines operating at the Dulles Intl airport, and any specific guidelines or requirements for travellers. Please note that the information is based on the most recent updates available. Data last updated 5 February 2026.

Good round-trip deal

฿8,358 or less

Good one-way deal

฿9,507 or less
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl.
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Price to beat on a one-way flight from Washington, D.C. Dulles Intl.
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Enter your travel dates to find the best prices.

Cheapest flights from Dulles Intl
Explore the most affordable flight options available from Dulles Intl. Find the lowest fares based on data from user searches, with prices last updated on 5 February 2026.

Mon 2/312:35
IAD
-
PDX
1 stop9h 41m
เดลต้า
Mon 9/322:30
PDX
-
IAD
1 stop7h 40m
เดลต้า
Deal found 3/2฿8,764
Fri 6/319:05
IAD
-
PDX
Nonstop5h 53m
United Airlines
Mon 16/323:10
PDX
-
IAD
Nonstop4h 53m
United Airlines
Deal found 3/2฿8,859
Thu 5/319:05
IAD
-
PDX
Nonstop5h 53m
United Airlines
Tue 10/319:49
PDX
-
IAD
1 stop8h 07m
United Airlines
Deal found 3/2฿9,048
Tue 17/319:05
IAD
-
PDX
Nonstop5h 53m
United Airlines
Tue 24/319:49
PDX
-
IAD
1 stop8h 07m
United Airlines
Deal found 3/2฿9,080
Fri 10/417:32
IAD
-
PDX
1 stop7h 21m
เดลต้า
Tue 14/400:30
PDX
-
IAD
1 stop8h 02m
เดลต้า
Deal found 3/2฿9,238
Thu 12/319:05
IAD
-
PDX
Nonstop5h 53m
United Airlines
Sat 14/323:10
PDX
-
IAD
Nonstop4h 53m
United Airlines
Deal found 4/2฿9,270
Sat 28/213:20
IAD
-
PDX
1 stop8h 29m
United Airlines
Sat 7/323:28
PDX
-
IAD
1 stop8h 21m
United Airlines
Deal found 3/2฿9,333
Wed 11/319:05
IAD
-
PDX
Nonstop5h 53m
United Airlines
Fri 13/323:10
PDX
-
IAD
Nonstop4h 53m
United Airlines
Deal found 4/2฿9,396
Thu 5/307:00
IAD
-
PDX
1 stop8h 44m
เดลต้า
Wed 11/313:55
PDX
-
IAD
1 stop6h 53m
เดลต้า
Deal found 4/2฿9,428
Thu 5/313:15
IAD
-
PDX
1 stop8h 59m
United Airlines
Mon 9/319:49
PDX
-
IAD
1 stop8h 42m
United Airlines
Deal found 4/2฿9,460
Thu 9/415:10
IAD
-
BKK
1 stop40h 00m
เอทิฮัดแอร์เวย์
Fri 17/409:45
BKK
-
IAD
1 stop35h 00m
เอทิฮัดแอร์เวย์
Deal found 4/2฿26,861
Mon 16/315:35
IAD
-
BKK
1 stop28h 35m
เอทิฮัดแอร์เวย์
Wed 15/412:25
BKK
-
IAD
2 stops56h 20m
เอทิฮัดแอร์เวย์
Deal found 4/2฿26,892

Find flights from Dulles Intl within your budget

 
Find flights departing from Dulles Intl that match your specified budget. Filter results by price range, allowing you to narrow down options and find flights that fit within your financial constraints. Please note that the search results are based on data from user searches, with fares last updated on 5 February 2026. In the last 7 days, Cheapflights users made a total of 17,341 searches

Fly to

Suvarnabhumi

Route

Depart

Return

Price

Washington, D.C.Portland

IAD - PDX

IADPDX

Washington, D.C. Dulles Intl

Sat 7/3

17:10-22:26

1 stop8h 16m

Portland

Thu 12/3

18:57-05:17

1 stop7h 20m

฿8,764

Washington, D.C.Portland

IAD - PDX

IADPDX

Washington, D.C. Dulles Intl

Fri 6/3

19:05-21:58

Nonstop5h 53m

Portland

Mon 16/3

23:10-07:03

Nonstop4h 53m

฿8,859

Washington, D.C.Portland

IAD - PDX

IADPDX

Washington, D.C. Dulles Intl

Wed 8/4

18:22-09:49

1 stop18h 27m

Portland

Tue 14/4

17:32-17:22

1 stop20h 50m

฿9,080

Washington, D.C.Portland

IAD - PDX

IADPDX

Washington, D.C. Dulles Intl

Wed 18/3

13:19-22:10

1 stop11h 51m

Portland

Tue 24/3

23:15-11:32

1 stop9h 17m

฿9,175

Washington, D.C.Portland

IAD - PDX

IADPDX

Washington, D.C. Dulles Intl

Tue 7/4

18:22-09:49

1 stop18h 27m

Portland

Mon 13/4

21:32-17:22

1 stop16h 50m

฿9,238

Washington, D.C.Portland

IAD - PDX

IADPDX

Washington, D.C. Dulles Intl

Fri 10/4

17:32-21:53

1 stop7h 21m

Portland

Tue 14/4

06:15-17:57

1 stop8h 42m

฿9,238

Washington, D.C.Portland

IAD - PDX

IADPDX

Washington, D.C. Dulles Intl

Tue 14/4

07:00-14:50

1 stop10h 50m

Portland

Tue 14/4

23:15-10:18

1 stop8h 03m

฿9,428

Washington, D.C.Portland

IAD - PDX

IADPDX

Washington, D.C. Dulles Intl

Wed 25/2

17:30-22:15

1 stop7h 45m

Portland

Tue 3/3

06:00-21:55

2 stops12h 55m

฿9,555

Washington, D.C.Portland

IAD - PDX

IADPDX

Washington, D.C. Dulles Intl

Sat 25/4

09:23-16:33

1 stop10h 10m

Portland

Tue 28/4

08:05-16:17

Nonstop5h 12m

฿9,713

Washington, D.C.Portland

IAD - PDX

IADPDX

Washington, D.C. Dulles Intl

Thu 12/3

16:10-23:04

1 stop9h 54m

Portland

Wed 18/3

18:57-05:17

1 stop7h 20m

฿9,871

Flights are sorted by cheapest return flights first.

Deals found on 5/2

Showing 1-10 of 60 results
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Best time to book a flight from Dulles Intl

Have a flexible travel schedule? Discover the best time to fly from 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.

Travel insights for flights from Dulles Intl

Get recent, data-driven insights about flights from Dulles Intl including ideal travel times, pricing trends, and more.

When is the best time to book a flight from Washington, D.C. Dulles Intl Airport?

Use this chart to determine the optimal time to book a return flight from Dulles Intl to Suvarnabhumi. Price data was last updated on 30 January 2026.

Booking 39 days in advance of your planned departure date is, on average, the best time to get cheap flights from Washington, D.C. Dulles Intl Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport?

Currently, May is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport (average of ฿19,900). Flying from Washington, D.C. Dulles Intl Airport in June will prove the most costly (average of ฿34,517). There are multiple factors that influence the price of a flight so comparing airlines, departure airports and times can help keep costs down.

Which airlines fly from Washington, D.C. Dulles Intl Airport?

Many airlines operate round-trip flights from Washington, D.C. Dulles Intl Airport: Korean Air, เตอร์กิชแอร์ไลน์. These airlines fly to the following popular destinations: Bangkok.

Korean Air
Korean Air
From ฿41,721
เตอร์กิชแอร์ไลน์
เตอร์กิชแอร์ไลน์
From ฿31,155

What are popular destinations to fly to from Washington, D.C. Dulles Intl Airport?

If you’re flying from Washington, D.C. Dulles Intl Airport, these routes are more frequently taken by airlines London (324 flights per day), Detroit (248 flights per day) and Atlanta (205 flights per day).

Seoul
Seoul
From ฿41,721
Mexico City Benito Juarez
Mexico City Benito Juarez
From ฿9,507
Paris
Paris
From ฿26,681

What is the cheapest place to fly to from Washington, D.C. Dulles Intl Airport?

The cheapest city to fly to from Washington, D.C. Dulles Intl Airport is Mexico City Benito Juarez, with prices starting at ฿9,507. Explore other affordable destinations below.

Mexico City Benito Juarez
Mexico City Benito Juarez
From ฿9,507
Paris
Paris
From ฿26,681

Airline reviews for flights from Dulles Intl

Get insights into the airlines that provide service from 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 airline for your flight from Dulles Intl. In the last 7 days, Cheapflights users made a total of 17,341 searches.
See what other customers who have flown with Korean Air and เตอร์กิชแอร์ไลน์ from Washington, D.C. Dulles Intl Airport have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very Good
1,188 reviews
Check prices

Food

8.1

Boarding

8.5

Comfort

8.3

Entertainment

8.2

Crew

8.7

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Korean Air
8.4
Very Good
1,188 reviews
Korean Air
8.4
Very Good
1,188 reviews
Check prices

Food

8.1

Boarding

8.5

Comfort

8.3

Entertainment

8.2

Crew

8.7

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
เตอร์กิชแอร์ไลน์
7.3
Good
4,210 reviews
Korean Air
8.4
Very Good
1,188 reviews
Check prices

Food

8.1

Boarding

8.5

Comfort

8.3

Entertainment

8.2

Crew

8.7

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

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Alternate flight departure points to Dulles Intl

Consider leaving from one of these other departure points that are located a short distance from Dulles Intl. Flight origins were last updated on 5 February 2026.
Flights from Reagan-National

Related info for your journey

Access useful and relevant information related to your journey from Dulles Intl. This can include details such as airport transportation, visa requirements, travel insurance, luggage regulations, and any other information that can ensure a smooth and hassle-free travel experience. Please note that the information is based on general guidance and may need to be verified with official sources. Data last updated 5 February 2026.

  • What are the most popular destinations to fly to from Washington, D.C. Dulles Intl Airport?

    The most selected flight destinations from Washington, D.C. Dulles Intl Airport for the current month are Mumbai, Ahmedabad, Atlanta. While Mumbai, Cairo, Ahmedabad are the top choices made by travellers year-round.

  • What is the cheapest flight from Washington, D.C. Dulles Intl Airport to anywhere?

    Users have flown out of Washington, D.C. Dulles Intl Airport for as low as ฿8,358 to San Salvador (prices may vary depending on the airline and departure time). On average, users have booked flights for ฿34,130 to fly from Washington, D.C. Dulles Intl Airport.

  • What is the cheapest month to fly from Washington, D.C. Dulles Intl Airport?

    At the present moment the cheapest month to fly from Washington, D.C. Dulles Intl Airport is currently May; with June being the most expensive. Prices will vary depending on multiple factors such as booking in advance, airline and departure airports and times.

  • Where are the cheapest places to fly to from Washington, D.C. Dulles Intl Airport?

    Here are some of the cheapest flight destinations from Washington, D.C. Dulles Intl Airport:
    Fly from Washington, D.C. to Bangkok from ฿25,121

  • How does Cheapflights help users find flights from Dulles Intl?

    Cheapflights helps you search for flights from 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 from Dulles Intl?

    Cheapflights helps you find that perfect flight from Dulles Intl by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

  • Can Cheapflights find flights from Dulles Intl with no change fees?

    Yes! Cheapflights helps users easily find flights from Dulles Intl with no change fees.

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

    Yes, Cheapflights offers price alerts on flights from Dulles Intl so you can book your travels when it’s right. The Price Alerts feature is available by clicking the bell icon next to the flight deals above and providing your email address.

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Cheapflights helps you search for flights from 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 from Dulles Intl?

Cheapflights helps you find that perfect flight from Dulles Intl by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Yes! Cheapflights helps users easily find flights from Dulles Intl with no change fees.

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

Yes, Cheapflights offers price alerts on flights from Dulles Intl so you can book your travels when it’s right. The Price Alerts feature is available by clicking the bell icon next to the flight deals above and providing your email address.

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