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

Airlines like Scandinavian Airlines and ITA Airways fly from Washington, D.C. Dulles Intl Airport to Brussels in about 11h 55m. The time it takes to get you to your destination can typically vary by up to 05m. 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 Scandinavian Airlines. Our recent data shows that you can find tickets from as low as $419 on this airline. Additional options worth looking into are Icelandair and KLM, starting at $441 and $480 round-trip. These flights start at 48% lower than the current average price 3 months from now.

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 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, April is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Brussels (average of $427). Flying from Washington, D.C. Dulles Intl Airport to Brussels in June is currently the most expensive (average of $684). 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.

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 $409. On average you can expect to pay $1,726. The most popular route, (Washington, D.C. Dulles Intl - Brussels Bruxelles-National), can usually be booked for $388.

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 (43%).

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, Aer Lingus or Scandinavian Airlines.

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

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.

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.

$278+ Flights from Washington, D.C. Dulles Intl Airport to Brussels

Round-trip from	$510 (FlightHub)
One-way from	$278 (FlightHub)
Popular in	June
Cheapest in	September
Average price	$695

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.

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.

Lufthansa

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

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

Airline	Cheapest	Average	Flexibility	On-time
Scandinavian Airlines	Cheapest$419	Average$567	FlexibilityNo cancel fee	On-time77%
Icelandair	Cheapest$441	Average$754	FlexibilityNo cancel fee	On-time76%
KLM	Cheapest$480	Average$713	FlexibilityNo cancel fee	On-time75%
TAP AIR PORTUGAL	Cheapest$480	Average$929	FlexibilityNo cancel fee	On-timeN/A
Delta	Cheapest$511	Average$704	FlexibilityNo cancel fee	On-timeN/A
Aer Lingus	Cheapest$539	Average$782	FlexibilityNo cancel fee	On-timeN/A
Turkish Airlines	Cheapest$540	Average$624	FlexibilityNo cancel fee	On-time77%
British Airways	Cheapest$555	Average$726	FlexibilityNo cancel fee	On-time70%
United Airlines	Cheapest$596	Average$953	FlexibilityNo cancel fee	On-time69%
Brussels Airlines	Cheapest$633	Average$1,069	FlexibilityNo cancel fee	On-timeN/A

$278+ 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 2/11. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Dulles Intl to Brussels with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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 Wednesday

Cheap flight deals from Dulles Intl to Brussels

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Dulles Intl to Brussels

Cheapest flights from Dulles Intl to BrusselsExplore 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 November 26, 2025.

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 November 26, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Brussels that are best for you.

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

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 November 21, 2025.

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?

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 November 26, 2025.

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

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

Airlines

United Airlines

Brussels Airlines

Lufthansa

Our travel experts

Reviews of airlines servicing Brussels

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.

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?

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

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

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

Alternative routes for Dulles Intl to Brussels

See prices for flight routes from nearby airports that may be better suited for you.

Top 10 airlines flying from Dulles Intl to Brussels

100% Free

Book with Flexibility

Travel Smart

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 November 26, 2025.