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$261+ Cheap flights from Dulles Intl (IAD) to Brussels

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 1/19. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BRU
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Brussels are usually found in September or August, booked 74 days in advance, depart on a Wednesday or Friday and return on a Friday

Cheap flight deals from Dulles Intl to Brussels

Cheapest flights from Dulles Intl to Brussels
Explore the most affordable flight options available from Dulles Intl to Brussels. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

This CrystalTravel deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:40 pmIAD - BRU
1 stop10h 15mIcelandair
Thu 2/2612:50 pmBRU - IAD
1 stop11h 40mIcelandair
Deal found 12/9$560
This CrystalTravel deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:40 pmIAD - BRU
1 stop10h 15mMultiple Airlines
Thu 2/2610:20 amBRU - IAD
2 stops14h 10mMultiple Airlines
Deal found 12/9$719
This Mytrip deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3110:30 pmIAD - CRL
2 stops16h 25mMultiple Airlines
Thu 2/265:35 pmCRL - IAD
2 stops33h 25mMultiple Airlines
Deal found 12/9$735
This Kiwi.com deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2810:30 pmIAD - BRU
1 stop19h 20mTAP AIR PORTUGAL
Sun 1/115:55 pmBRU - IAD
1 stop27h 20mTAP AIR PORTUGAL
Deal found 12/11$809
This Cheapflightsfares deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/117:40 pmIAD - BRU
1 stop10h 15mIcelandair
Thu 12/1812:50 pmBRU - IAD
1 stop11h 40mIcelandair
Deal found 12/10$814
This KAYAK deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/318:30 pmIAD - BRU
1 stop12h 00mScandinavian Airlines
Sun 1/118:30 pmBRU - IAD
2 stops28h 39mScandinavian Airlines
Deal found 12/11$819
This KAYAK deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/295:30 pmIAD - BRU
1 stop11h 30mTAP AIR PORTUGAL
Sun 1/115:55 pmBRU - IAD
1 stop27h 20mTAP AIR PORTUGAL
Deal found 12/11$833
This FlightHub deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:40 pmIAD - BRU
1 stop10h 15mIcelandair
Fri 1/912:50 pmBRU - IAD
1 stop11h 40mIcelandair
Deal found 12/11$854
This CrystalTravel deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/117:40 pmIAD - BRU
1 stop10h 15mIcelandair
Sun 12/1412:50 pmBRU - IAD
1 stop11h 40mIcelandair
Deal found 12/10$868
This TAP AIR PORTUGAL deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/115:30 pmIAD - BRU
1 stop17h 35mTAP AIR PORTUGAL
Wed 12/245:55 pmBRU - IAD
1 stop27h 20mTAP AIR PORTUGAL
Deal found 12/9$873
This FlightHub deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/311:30 pmIAD - BRU
1 stop15h 05mTurkish Airlines
Thu 1/87:50 amBRU - IAD
1 stop17h 30mTurkish Airlines
Deal found 12/11$876
This Kiwi.com deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3110:30 pmIAD - CRL
2 stops27h 40mMultiple Airlines
Sat 1/107:00 amCRL - IAD
1 stop14h 15mMultiple Airlines
Deal found 12/11$934

Find flight deals from Dulles Intl to Brussels

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Brussels (BR1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 12, 2025.

Round-trip from

$513
(Flighttix)

One-way from

$261
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$873
From Washington, D.C. Dulles Intl to Brussels
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Brussels
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($187 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Brussels that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 12, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Brussels that are best for you.

Fly from

Dulles Intl

Fly to

Brussels

Route

Depart

Return

Price

Washington, D.C.Brussels

IAD - BRU

IADBRU

Washington, D.C. Dulles Intl

Mon 2/9

8:30 pm-7:50 pm

1 stop17h 20m

Brussels Bruxelles-National

Sat 2/21

10:20 am-6:50 pm

1 stop14h 30m

$569

Washington, D.C.Brussels

IAD - CRL

IADCRL

Washington, D.C. Dulles Intl

Fri 1/9

7:40 pm-8:45 pm

2 stops19h 05m

Charleroi Brussels

Fri 1/16

8:35 am-6:30 pm

2 stops15h 55m

$595

Washington, D.C.Brussels

IAD - CRL

IADCRL

Washington, D.C. Dulles Intl

Fri 1/30

10:30 pm-10:30 pm

2 stops18h 00m

Charleroi Brussels

Wed 2/4

7:30 pm-3:15 pm

2 stops25h 45m

$614

Washington, D.C.Brussels

IAD - CRL

IADCRL

Washington, D.C. Dulles Intl

Sun 1/25

9:45 am-10:15 pm

3 stops30h 30m

Charleroi Brussels

Sat 1/31

9:10 pm-4:40 pm

2 stops25h 30m

$693

Washington, D.C.Brussels

IAD - CRL

IADCRL

Washington, D.C. Dulles Intl

Sat 1/24

1:30 pm-7:20 pm

2 stops23h 50m

Charleroi Brussels

Mon 2/2

7:55 pm-7:20 pm

2 stops29h 25m

$699

Washington, D.C.Brussels

IAD - CRL

IADCRL

Washington, D.C. Dulles Intl

Sat 2/14

1:30 pm-10:55 pm

2 stops27h 25m

Charleroi Brussels

Wed 2/18

2:55 pm-11:45 am

2 stops26h 50m

$707

Washington, D.C.Brussels

IAD - BRU

IADBRU

Washington, D.C. Dulles Intl

Wed 3/11

7:20 pm-1:15 pm

1 stop12h 55m

Brussels Bruxelles-National

Fri 3/20

11:55 am-3:35 pm

Nonstop8h 40m

$708

Washington, D.C.Brussels

IAD - BRU

IADBRU

Washington, D.C. Dulles Intl

Mon 3/9

7:20 pm-1:15 pm

1 stop12h 55m

Brussels Bruxelles-National

Fri 3/20

11:55 am-3:35 pm

Nonstop8h 40m

$708

Washington, D.C.Brussels

IAD - BRU

IADBRU

Washington, D.C. Dulles Intl

Wed 3/11

7:20 pm-1:15 pm

1 stop12h 55m

Brussels Bruxelles-National

Wed 3/18

11:55 am-3:35 pm

Nonstop8h 40m

$708

Washington, D.C.Brussels

IAD - BRU

IADBRU

Washington, D.C. Dulles Intl

Sun 2/8

10:15 pm-8:55 am

1 stop28h 40m

Brussels Bruxelles-National

Fri 2/20

11:55 am-2:35 pm

Nonstop8h 40m

$708

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/9

Showing 1-10 of 39 results
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Best time to book a flight from Dulles Intl to Brussels

Have a flexible travel schedule? Discover the best time to fly to Brussels from Dulles Intl with our price prediction graph.
Estimated round-trip 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 from Washington, D.C. Dulles Intl Airport to Brussels

How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to Brussels?

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Brussels. Price data was last updated on December 5, 2025.

The best time to book flights from Washington, D.C. Dulles Intl Airport to Brussels is 74 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, October is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Brussels (average of $436). Flying from Washington, D.C. Dulles Intl Airport to Brussels in June is currently the most expensive (average of $679). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IAD to BRU?

Find hourly flight availability from Dulles Intl to Brussels. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 12, 2025.

One of the essential ways to save on airfare from Washington, D.C. Dulles Intl Airport to Brussels is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 33% on airfare.

Weekly flight availability from Washington, D.C. Dulles Intl Airport to Brussels

Explore weekly flight availability from Dulles Intl to Brussels. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated December 12, 2025.

The most flights from IAD to BR1 are scheduled on a Monday (6 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (6 on average).

How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport to Brussels?

The best insider tips for Washington, D.C. Dulles Intl Airport to Brussels flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Dulles Intl Airport to Brussels trip
Airlines
United Airlines

United's Polaris Business Class offers lie-flat seats and Saks Fifth Avenue bedding.


United's Premium Plus includes priority check-in and two checked bags on international flights.

Read more about United AirlinesBy Harriet Baskas
Brussels Airlines

Brussels Airlines offers lie-flat beds in business class with direct aisle access for most seats.


Economy class includes a free meal and seatback entertainment on long-haul flights.

Read more about Brussels AirlinesBy John Walton
Lufthansa

Lufthansa's Allegris cabins offer advanced comfort features on long-haul flights.


Lufthansa's economy includes meals and beverages on international flights.

Read more about LufthansaBy Blane Bachelor
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on United Airlines

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
John Walton

John Walton

Expert on Brussels Airlines

John Walton

John Walton

Independent aviation journalist John Walton took his first flight at eight weeks old and hasn’t stopped travelling since. A world-renowned expert in airlines and the passenger experience, he writes in depth on aviation, is a resident expert on travel in Japan and France, and offers a uniquely queer perspective on travelling the world.

Read more
Blane Bachelor

Blane Bachelor

Expert on Lufthansa

Blane Bachelor

Blane Bachelor

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Read more

Reviews of airlines servicing Brussels

Get insights into the airlines that provide service to Brussels. 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 Brussels. Reviews last updated December 12, 2025.
See what other customers who have flown with Scandinavian Airlines, United Airlines, and Aer Lingus from Washington, D.C. Dulles Intl Airport to Brussels have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Scandinavian Airlines
7.4
Good
1,605 reviews

Food

6.7

Boarding

7.6

Comfort

7.3

Overall

7.4

Entertainment

6.7

Crew

8.0

Reviews

1 / 20
8.0
Excellent

Kent,Aug 2025

CPH - SEA

When I got to Copenhagen, my two suitcases were missing from Monday 1030. I got them back Friday after five in the afternoon. My flight from Copenhagen to Seattle did not make the connection from Seattle to Honolulu
Scandinavian Airlines
7.4
Good
1,605 reviews
Scandinavian Airlines
7.4
Good
1,605 reviews

Food

6.7

Boarding

7.6

Comfort

7.3

Overall

7.4

Entertainment

6.7

Crew

8.0

Reviews

1 / 20
8.0
Excellent

Kent,Aug 2025

CPH - SEA

When I got to Copenhagen, my two suitcases were missing from Monday 1030. I got them back Friday after five in the afternoon. My flight from Copenhagen to Seattle did not make the connection from Seattle to Honolulu
United Airlines
7.4
Good
9,095 reviews
Scandinavian Airlines
7.4
Good
1,605 reviews

Food

6.7

Boarding

7.6

Comfort

7.3

Overall

7.4

Entertainment

6.7

Crew

8.0

Reviews

1 / 20
8.0
Excellent

Kent,Aug 2025

CPH - SEA

When I got to Copenhagen, my two suitcases were missing from Monday 1030. I got them back Friday after five in the afternoon. My flight from Copenhagen to Seattle did not make the connection from Seattle to Honolulu
Aer Lingus
7.2
Good
1,394 reviews
Scandinavian Airlines
7.4
Good
1,605 reviews

Food

6.7

Boarding

7.6

Comfort

7.3

Overall

7.4

Entertainment

6.7

Crew

8.0

Reviews

1 / 20
8.0
Excellent

Kent,Aug 2025

CPH - SEA

When I got to Copenhagen, my two suitcases were missing from Monday 1030. I got them back Friday after five in the afternoon. My flight from Copenhagen to Seattle did not make the connection from Seattle to Honolulu
Brussels Airlines
7.2
Good
375 reviews
Scandinavian Airlines
7.4
Good
1,605 reviews

Food

6.7

Boarding

7.6

Comfort

7.3

Overall

7.4

Entertainment

6.7

Crew

8.0

Reviews

1 / 20
8.0
Excellent

Kent,Aug 2025

CPH - SEA

When I got to Copenhagen, my two suitcases were missing from Monday 1030. I got them back Friday after five in the afternoon. My flight from Copenhagen to Seattle did not make the connection from Seattle to Honolulu
Icelandair
7.0
Good
589 reviews
Scandinavian Airlines
7.4
Good
1,605 reviews

Food

6.7

Boarding

7.6

Comfort

7.3

Overall

7.4

Entertainment

6.7

Crew

8.0

Reviews

1 / 20
8.0
Excellent

Kent,Aug 2025

CPH - SEA

When I got to Copenhagen, my two suitcases were missing from Monday 1030. I got them back Friday after five in the afternoon. My flight from Copenhagen to Seattle did not make the connection from Seattle to Honolulu

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Brussels. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Brussels?

    Airlines like Scandinavian Airlines and United Airlines fly from Washington, D.C. Dulles Intl Airport to Brussels in about 12h 55m. The time it takes to get you to your destination can typically vary by up to 4h 25m. Airlines will cover a distance of 3879 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Brussels round-trip?

    Our cheapest airline available from Washington, D.C. Dulles Intl Airport to Brussels is TAP AIR PORTUGAL. Our recent data shows that you can find tickets from as low as $333 on this airline. Additional options worth looking into are British Airways and Scandinavian Airlines, starting at $345 and $419 round-trip. These flights start at 58% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to Brussels one-way?

    One-way options have recently been found by users for as low as $188 on Icelandair. Other airlines that offer cheap prices include Scandinavian Airlines from $206 and TAP AIR PORTUGAL from $298 one-way.

  • What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to Brussels?

    The top 3 most reliable airlines when flying from Washington, D.C. Dulles Intl Airport to Brussels are Lufthansa (48%), Air Canada (48%) and Austrian Airlines (48%).

  • What are the cheapest flights from Washington, D.C. Dulles Intl Airport to Brussels?

    The cheapest flight price from Washington, D.C. Dulles Intl Airport to Brussels is $421. On average you can expect to pay $1,122. The most popular route, (Washington, D.C. Dulles Intl - Brussels Bruxelles-National), can usually be booked for $412.

  • Can I find deals for flights from Dulles Intl to Brussels that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Brussels flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Brussels?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Brussels.

  • Can I find deals for business class flights from Dulles Intl to Brussels?

    Yes. Cheapflights offers flight deals from Dulles Intl to Brussels by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, October is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Brussels (average of $436). Flying from Washington, D.C. Dulles Intl Airport to Brussels in June is currently the most expensive (average of $679). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 10 airlines flying from Dulles Intl to Brussels

Discover the top 10 airlines that operate flights from Dulles Intl to Brussels. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$419Average$572FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$441Average$759FlexibilityNo cancel feeOn-time76%
KLMCheapest$480Average$713FlexibilityNo cancel feeOn-time75%
TAP AIR PORTUGALCheapest$480Average$796FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$511Average$704FlexibilityNo cancel feeOn-timeN/A
Aer LingusCheapest$539Average$786FlexibilityNo cancel feeOn-timeN/A
Turkish AirlinesCheapest$540Average$624FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$555Average$726FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$592Average$929FlexibilityNo cancel feeOn-time69%
Brussels AirlinesCheapest$633Average$1,073FlexibilityNo cancel feeOn-timeN/A

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