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$258+ 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 10/13. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BRU
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
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 January, booked 74 days in advance, depart on a Wednesday or Friday and return on a Thursday

Cheap 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 September 11, 2025.

Round-trip from

$479
(FlightHub)

One-way from

$258
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$651
From Washington, D.C. Dulles Intl to Brussels
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One-way flight from Washington, D.C. Dulles Intl to Brussels
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Highest demand for flights based on searches. 18% potential increase in price ($190 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($25 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 11, 2025.

This FlightHub deal was found by Cheapflights users on 9/8. 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.
Tue 10/286:30 pmIAD - BRU
1 stop11h 30mTAP AIR PORTUGAL
Mon 11/36:00 amBRU - IAD
1 stop15h 15mTAP AIR PORTUGAL
Deal found 9/8$479
This FlightHub deal was found by Cheapflights users on 9/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/45:30 pmIAD - BRU
1 stop24h 20mTAP AIR PORTUGAL
Sun 11/95:55 pmBRU - IAD
1 stop27h 20mTAP AIR PORTUGAL
Deal found 9/10$480
This oojo deal was found by Cheapflights users on 9/11. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/55:45 pmIAD - BRU
1 stop11h 15mTAP AIR PORTUGAL
Tue 10/2111:50 amBRU - IAD
1 stop33h 30mTAP AIR PORTUGAL
Deal found 9/11$482
This FlightHub deal was found by Cheapflights users on 9/11. 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.
Thu 10/2310:20 pmIAD - BRU
1 stop30h 40mTAP AIR PORTUGAL
Mon 11/35:55 pmBRU - IAD
1 stop26h 40mTAP AIR PORTUGAL
Deal found 9/11$484
This Cheapflightsfares deal was found by Cheapflights users on 9/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2812:09 pmIAD - BRU
2 stops21h 21mScandinavian Airlines
Sat 11/810:20 amBRU - IAD
1 stop14h 30mScandinavian Airlines
Deal found 9/11$486
This Scandinavian Airlines deal was found by Cheapflights users on 9/9. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2410:05 pmIAD - BRU
2 stops14h 10mScandinavian Airlines
Wed 4/229:10 pmBRU - IAD
2 stops25h 40mScandinavian Airlines
Deal found 9/9$489
This oojo deal was found by Cheapflights users on 9/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2810:05 pmIAD - BRU
1 stop15h 45mScandinavian Airlines
Fri 10/37:00 pmBRU - IAD
2 stops30h 59mScandinavian Airlines
Deal found 9/9$496
This Scandinavian Airlines deal was found by Cheapflights users on 9/9. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2210:05 pmIAD - BRU
2 stops14h 15mScandinavian Airlines
Tue 10/287:20 pmBRU - IAD
2 stops27h 55mScandinavian Airlines
Deal found 9/9$499
This Scandinavian Airlines deal was found by Cheapflights users on 9/10. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/610:05 pmIAD - BRU
1 stop11h 15mScandinavian Airlines
Wed 10/2910:20 amBRU - IAD
1 stop12h 55mScandinavian Airlines
Deal found 9/10$500
This FlightHub deal was found by Cheapflights users on 9/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/410:05 pmIAD - BRU
2 stops30h 10mScandinavian Airlines
Wed 10/2210:55 amBRU - IAD
2 stops15h 04mScandinavian Airlines
Deal found 9/10$503
This Mytrip deal was found by Cheapflights users on 9/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/94:25 pmIAD - CRL
2 stops14h 20mMultiple Airlines
Mon 11/171:10 pmCRL - IAD
2 stops33h 30mMultiple Airlines
Deal found 9/10$571
This Mytrip deal was found by Cheapflights users on 9/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2210:20 amIAD - CRL
2 stops22h 25mMultiple Airlines
Wed 10/299:25 pmCRL - IAD
2 stops25h 15mMultiple Airlines
Deal found 9/10$593

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 September 11, 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

Wed 9/24

10:05 pm-3:20 pm

1 stop11h 15m

Brussels Bruxelles-National

Wed 4/22

11:20 am-4:50 pm

2 stops35h 30m

$486

Washington, D.C.Brussels

IAD - BRU

IADBRU

Washington, D.C. Dulles Intl

Thu 2/5

8:30 pm-6:40 pm

2 stops16h 10m

Brussels Bruxelles-National

Mon 2/9

8:30 pm-7:12 pm

2 stops28h 42m

$535

Washington, D.C.Brussels

IAD - CRL

IADCRL

Washington, D.C. Dulles Intl

Mon 10/13

10:20 pm-8:05 pm

2 stops15h 45m

Charleroi Brussels

Tue 10/21

6:50 pm-3:20 pm

2 stops26h 30m

$569

Washington, D.C.Brussels

IAD - BRU

IADBRU

Washington, D.C. Dulles Intl

Thu 10/16

10:05 pm-6:20 pm

2 stops14h 15m

Brussels Bruxelles-National

Tue 10/21

6:55 pm-7:59 pm

2 stops31h 04m

$569

Washington, D.C.Brussels

IAD - CRL

IADCRL

Washington, D.C. Dulles Intl

Wed 10/22

10:20 am-2:45 pm

2 stops22h 25m

Charleroi Brussels

Wed 10/29

9:25 pm-5:40 pm

2 stops25h 15m

$593

Washington, D.C.Brussels

IAD - CRL

IADCRL

Washington, D.C. Dulles Intl

Wed 10/8

6:10 pm-8:40 pm

2 stops20h 30m

Charleroi Brussels

Wed 10/15

5:15 pm-1:30 pm

2 stops26h 15m

$608

Washington, D.C.Brussels

IAD - CRL

IADCRL

Washington, D.C. Dulles Intl

Tue 10/28

9:00 am-10:50 pm

3 stops32h 50m

Charleroi Brussels

Mon 11/3

5:35 pm-3:50 pm

2 stops28h 15m

$615

Washington, D.C.Brussels

IAD - BRU

IADBRU

Washington, D.C. Dulles Intl

Thu 10/9

10:05 pm-7:50 pm

1 stop15h 45m

Brussels Bruxelles-National

Tue 10/14

8:55 pm-7:18 pm

2 stops28h 23m

$615

Washington, D.C.Brussels

IAD - CRL

IADCRL

Washington, D.C. Dulles Intl

Thu 10/30

6:30 pm-10:55 pm

2 stops23h 25m

Charleroi Brussels

Wed 11/5

10:25 am-3:15 pm

2 stops34h 50m

$618

Washington, D.C.Brussels

IAD - BRU

IADBRU

Washington, D.C. Dulles Intl

Sat 10/11

10:05 pm-10:15 am

2 stops30h 10m

Brussels Bruxelles-National

Tue 10/14

8:55 pm-7:18 pm

2 stops28h 23m

$618

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 38 results
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The best insider tips for Washington, D.C. Dulles Intl Airport to Brussels flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
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

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 August 29, 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, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Brussels (average of $614). Flying from Washington, D.C. Dulles Intl Airport to Brussels in June is currently the most expensive (average of $1,077). 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 September 11, 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 in the evening could potentially save you up to 49% 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 September 11, 2025.

The most flights from IAD to BR1 are scheduled on a Monday (8 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (6 on average).

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 September 11, 2025.
See what other customers who have flown with Scandinavian Airlines, United Airlines, and Brussels Airlines 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
1,484 reviews

Boarding

7.7

Entertainment

6.7

Comfort

7.3

Food

6.7

Crew

8.0

Overall

7.4

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
1,484 reviews
Scandinavian Airlines
7.4
Good
1,484 reviews

Boarding

7.7

Entertainment

6.7

Comfort

7.3

Food

6.7

Crew

8.0

Overall

7.4

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
8,937 reviews
Scandinavian Airlines
7.4
Good
1,484 reviews

Boarding

7.7

Entertainment

6.7

Comfort

7.3

Food

6.7

Crew

8.0

Overall

7.4

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
7.3
Good
359 reviews
Scandinavian Airlines
7.4
Good
1,484 reviews

Boarding

7.7

Entertainment

6.7

Comfort

7.3

Food

6.7

Crew

8.0

Overall

7.4

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
1,271 reviews
Scandinavian Airlines
7.4
Good
1,484 reviews

Boarding

7.7

Entertainment

6.7

Comfort

7.3

Food

6.7

Crew

8.0

Overall

7.4

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
546 reviews
Scandinavian Airlines
7.4
Good
1,484 reviews

Boarding

7.7

Entertainment

6.7

Comfort

7.3

Food

6.7

Crew

8.0

Overall

7.4

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 fly from Washington, D.C. Dulles Intl Airport to Brussels in about 11h 15m. The time it takes to get you to your destination can typically vary by up to . Airlines will cover a distance of 3879 mi.

  • 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 Scandinavian Airlines. Our recent data shows that you can find tickets from as low as $408 on this airline. Additional options worth looking into are Icelandair and TAP AIR PORTUGAL, starting at $452 and $492 round-trip. These flights start at 50% lower than the current average price 3 months from now.

  • 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 Brussels Airlines (53%), United Airlines (53%) and Air Canada (31%).

  • 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 $483. On average you can expect to pay $1,365. The most popular route, (Washington, D.C. Dulles Intl - Brussels Bruxelles-National), can usually be booked for $391.

  • 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, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Brussels (average of $614). Flying from Washington, D.C. Dulles Intl Airport to Brussels in June is currently the most expensive (average of $1,077). 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

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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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$408Average$556FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$452Average$750FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$492Average$953FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$496Average$748FlexibilityNo cancel feeOn-time75%
Turkish AirlinesCheapest$551Average$650FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$557Average$771FlexibilityNo cancel feeOn-time70%
Aer LingusCheapest$561Average$789FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$601Average$982FlexibilityNo cancel feeOn-time69%
Brussels AirlinesCheapest$633Average$1,040FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$686Average$1,089FlexibilityNo cancel feeOn-time76%

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