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 Icelandair. Our recent data shows that you can find tickets from as low as $385 on this airline. Additional options worth looking into are Scandinavian Airlines and Turkish Airlines, starting at $467 and $602 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 $232 on Icelandair. Other airlines that offer cheap prices include Scandinavian Airlines from $456 and TAP AIR PORTUGAL from $496 one-way.

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

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).

In terms of precipitation, rainfall in Brussels ranges from 1.6 - 3.1 inches per month. January is typically the wettest month, when rainfall can reach 3.1 in. August is typically the driest time to visit Brussels when rainfall is around 1.6 in.

If weather is an important factor for your trip to Brussels, 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 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 37.4 F).

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 $448. On average you can expect to pay $2,378. The most popular route, (Washington, D.C. Dulles Intl - Brussels Bruxelles-National), can usually be booked for $398.

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 (72%), United Airlines (72%) and Air Canada (60%).

What are the most popular airlines that fly from Washington, D.C. Dulles Intl Airport to Brussels?

Before booking your flight from Washington, D.C. Dulles Intl Airport to Brussels check out the most popular airlines for this route: United Airlines, Scandinavian Airlines or Aer Lingus.

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.

Find Cheap Flights from Washington, D.C. Dulles Intl Airport to Brussels

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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Brussels are usually found in January or November, booked 71 days in advance, depart on a Wednesday or Tuesday and return on a Monday

Find flight deals from Dulles Intl to Brussels

Popular in	June
Cheapest in	January
Average price	$972

Highest demand for flights based on searches. 18% potential increase in price ($206 potential increase over avg. RT price).

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Cheapest flight prices on average. 4% potential price decrease ($41 potential savings vs. average RT price).

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Average for round-trip flights in October 2026

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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.

IAD-BR1

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.

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Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to Brussels

Prices

Airlines

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

The best time to book flights from Washington, D.C. Dulles Intl Airport to Brussels is 64 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, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Brussels (average of $600). Flying from Washington, D.C. Dulles Intl Airport to Brussels in June is currently the most expensive (average of $1,377). 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?

When flying from Washington, D.C. Dulles Intl Airport to Brussels, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Dulles Intl Airport to Brussels trip

Our travel experts

Harriet Baskas

Expert on United Airlines

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.

John Walton

Expert on Brussels Airlines

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.

Blane Bachelor

Expert on Lufthansa

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.

See what other customers who have flown with Scandinavian Airlines,United Airlines, andAer 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

2,007 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Mar 2026

BOS - CPH

I booked sas lodge - but I was unable to use it in Copenhagen because lodge was beyond check point. But SAS website confirmed access:(

Scandinavian Airlines

7.4

Good

2,007 reviews

Scandinavian Airlines

7.4

Good

2,007 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Mar 2026

BOS - CPH

I booked sas lodge - but I was unable to use it in Copenhagen because lodge was beyond check point. But SAS website confirmed access:(

United Airlines

7.4

Good

10,292 reviews

Scandinavian Airlines

7.4

Good

2,007 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Mar 2026

BOS - CPH

I booked sas lodge - but I was unable to use it in Copenhagen because lodge was beyond check point. But SAS website confirmed access:(

Aer Lingus

7.3

Good

1,818 reviews

Scandinavian Airlines

7.4

Good

2,007 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Mar 2026

BOS - CPH

I booked sas lodge - but I was unable to use it in Copenhagen because lodge was beyond check point. But SAS website confirmed access:(

Brussels Airlines

7.3

Good

435 reviews

Scandinavian Airlines

7.4

Good

2,007 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Mar 2026

BOS - CPH

I booked sas lodge - but I was unable to use it in Copenhagen because lodge was beyond check point. But SAS website confirmed access:(

Icelandair

6.9

Okay

757 reviews

Scandinavian Airlines

7.4

Good

2,007 reviews

Reviews

1 / 20

10.0

Excellent

Anonymous,Mar 2026

BOS - CPH

I booked sas lodge - but I was unable to use it in Copenhagen because lodge was beyond check point. But SAS website confirmed access:(

Related info for your journey

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 Icelandair. Our recent data shows that you can find tickets from as low as $385 on this airline. Additional options worth looking into are Scandinavian Airlines and Turkish Airlines, starting at $467 and $602 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 $232 on Icelandair. Other airlines that offer cheap prices include Scandinavian Airlines from $456 and TAP AIR PORTUGAL from $496 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 Brussels Airlines (72%), United Airlines (72%) and Air Canada (60%).
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 $448. On average you can expect to pay $2,378. The most popular route, (Washington, D.C. Dulles Intl - Brussels Bruxelles-National), can usually be booked for $398.
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, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Brussels (average of $600). Flying from Washington, D.C. Dulles Intl Airport to Brussels in June is currently the most expensive (average of $1,377). 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

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Top 7 airlines flying from Dulles Intl to Brussels

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest$385	Average$676	FlexibilityNo cancel fee	On-time76%
Scandinavian Airlines	Cheapest$467	Average$623	FlexibilityNo cancel fee	On-time77%
Turkish Airlines	Cheapest$602	Average$644	FlexibilityNo cancel fee	On-time77%
Aer Lingus	Cheapest$668	Average$868	FlexibilityNo cancel fee	On-timeN/A
Brussels Airlines	Cheapest$762	Average$1,588	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$762	Average$1,236	FlexibilityNo cancel fee	On-time69%
Lufthansa	Cheapest$775	Average$1,331	FlexibilityNo cancel fee	On-time76%

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Cheap flights from Dulles Intl (IAD) to Brussels

Find cheap flights from Dulles Intl to Brussels with Cheapflights

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3. Compare prices and book

Find flight deals from Dulles Intl to Brussels

Popular in

Cheapest in

Average price

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.

Cheapflights Insights

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

The best time to book flights from Washington, D.C. Dulles Intl Airport to Brussels is 64 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?

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

When flying from Washington, D.C. Dulles Intl Airport to Brussels, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

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).

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

Our travel experts

Reviews of airlines servicing Brussels

See what other customers who have flown with Scandinavian Airlines,United Airlines, andAer 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.

Related info for your journey

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

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

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

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

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

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

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

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Dulles Intl to Brussels

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Complete your trip

Complete your trip to Brussels by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Dulles Intl to Brussels by cabin class

Find flights from Dulles Intl to Brussels, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Dulles Intl and Brussels flights

Browse other Dulles Intl and Brussels flight options. Last updated on October 7, 2026.

Other flights from Dulles Intl

Browse through other flights departing from Dulles Intl. Flights are based on user searches made on Cheapflights and were last updated on October 7, 2026.

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Top 7 airlines flying from Dulles Intl to Brussels

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