$256 Find Cheap Flights from Washington, D.C. to Brussels

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Washington, D.C. to Brussels departing on 3/16. 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.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Brussels

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Brussels.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Brussels.
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Everything you should know

Cheapest round-trip
$468
Typical prices: $641-$1,038
Scandinavian Airlines
Sat 4/11Sat 4/18
IAD - BRU • 1 stop
Cheapest non-stop
$690
Typical prices: $1,068-$1,842
Brussels Airlines
Tue 4/21Tue 5/12
IAD - BRU • Non-stop
Our travelers' advice
AI-powered summary based on content written by travel experts. AI can make mistakes.
Lufthansa's Premium Economy includes extra space and bags.
United's Wi-Fi offers free streaming for T-Mobile users.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Scandinavian Airlines
Cheapest • from $468 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Top routes
IAD
-
BRU
Cheapest
IAD
-
BRU
Most popular
Insights
Insights
Insights
Insights
When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 49% compared to booking last minute.
Insights
Insights
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Flight Deals

Cheap Flights from Washington, D.C. to Brussels (IAD-BRU)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington, D.C. to Brussels that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Washington, D.C. to Brussels

Sat, Apr 11 - Sat, Apr 18
Scandinavian Airlines Logo
8:20 pm - 2:35 pm
IAD
-
BRU
12h 15m
1 stop
Scandinavian Airlines Logo
8:30 pm - 4:50 pm
BRU
-
IAD
26h 20m
1 stop
$468Scandinavian Airlines
Sun, Apr 12 - Thu, Apr 23
TAP AIR PORTUGAL Logo
10:35 pm - 8:05 pm
IAD
-
BRU
15h 30m
1 stop
TAP AIR PORTUGAL Logo
3:55 pm - 3:05 pm
BRU
-
IAD
29h 10m
1 stop
$469TAP AIR PORTUGAL
Wed, Apr 8 - Thu, Apr 16
Scandinavian Airlines Logo
8:20 pm - 6:30 pm
IAD
-
BRU
16h 10m
1 stop
Scandinavian Airlines Logo
6:55 pm - 4:50 pm
BRU
-
IAD
27h 55m
2 stops
$470Scandinavian Airlines
Mon, Feb 16 - Wed, Feb 25
Scandinavian Airlines Logo
8:30 pm - 6:35 pm
IAD
-
BRU
16h 05m
1 stop
Scandinavian Airlines Logo
7:20 pm - 5:15 pm
BRU
-
IAD
27h 55m
2 stops
$471Scandinavian Airlines
Wed, Apr 8 - Thu, Apr 16
Scandinavian Airlines Logo
8:20 pm - 8:30 pm
IAD
-
BRU
18h 10m
2 stops
Scandinavian Airlines Logo
9:10 pm - 4:50 pm
BRU
-
IAD
25h 40m
2 stops
$475Scandinavian Airlines
Sun, Apr 26 - Fri, May 1
Scandinavian Airlines Logo
8:20 pm - 8:30 pm
IAD
-
BRU
18h 10m
2 stops
Scandinavian Airlines Logo
9:10 pm - 4:50 pm
BRU
-
IAD
25h 40m
2 stops
$476Scandinavian Airlines
Mon, Mar 9 - Wed, Mar 18
TAP AIR PORTUGAL Logo
6:30 pm - 11:50 pm
IAD
-
BRU
24h 20m
1 stop
TAP AIR PORTUGAL Logo
11:50 am - 4:15 pm
BRU
-
IAD
33h 25m
1 stop
$477TAP AIR PORTUGAL
Wed, Apr 15 - Sun, Apr 19
Scandinavian Airlines Logo
8:20 pm - 8:30 pm
IAD
-
BRU
18h 10m
2 stops
Scandinavian Airlines Logo
8:30 pm - 4:50 pm
BRU
-
IAD
26h 20m
1 stop
$478Scandinavian Airlines
Fri, Apr 17 - Sun, Apr 26
Scandinavian Airlines Logo
8:20 pm - 2:35 pm
IAD
-
BRU
12h 15m
1 stop
Scandinavian Airlines Logo
10:20 am - 4:50 pm
BRU
-
IAD
12h 30m
1 stop
$479Scandinavian Airlines
Tue, Mar 10 - Wed, Mar 25
Multiple Airlines Logo
6:30 pm - 6:55 pm
IAD
-
CRL
19h 25m
1 stop
Multiple Airlines Logo
7:00 am - 10:00 pm
CRL
-
IAD
20h 00m
1 stop
$521Multiple Airlines
Booking Insights

KAYAK's insights & trends for Washington, D.C. to Brussels flights

Get data-powered insights and trends into flights from Washington, D.C. to Brussels to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Washington, D.C. Dulles Intl Airport to Brussels?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Washington, D.C. Dulles Intl Airport to Brussels departing in April.

What is the cheapest Washington, D.C. Dulles Intl Airport to Brussels flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest return flight from Washington, D.C. Dulles Intl Airport to Brussels costs $517 on the route between Washington, D.C. Dulles Intl Airport (IAD) and Brussels Bruxelles-National Airport (BRU). It is also the most popular route.

What’s the cheapest day of the week to fly from Washington, D.C. to Brussels?

The average price of all round-trip flights from Washington, D.C. Dulles Intl Airport to Brussels clicked on KAYAK for each day over the last 12 months.

When flying from Washington, D.C. to Brussels, you should consider leaving on a Wednesday and avoid Mondays if you are looking for the best rates. For your return to Washington, D.C., you’ll find the best rates on Fridays and the most expensive ones on Sundays.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to Brussels, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Washington, D.C. Dulles Intl Airport to Brussels is September, where tickets cost $622 (return) on average. On the other hand, the most expensive months are June and May, where the average cost of round-trip tickets is $1,036 and $977 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to Brussels, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Washington, D.C. Dulles Intl Airport to Brussels, you should book around 2 weeks before departure, which saves you about 49% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

Expert advice

Expert advice for your flight from Washington, D.C. to Brussels

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on United Airlines

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Marisa Garcia

Marisa Garcia

Expert on Brussels Airlines

Marisa knows planes inside and out, spending 16 years working on aircraft in hangars at airports around the world. She is an aviation industry expert, specialized in airline interiors and regulations. Ten years ago, she pivoted to journalism. She shares her insights in leading aviation, travel, and business publications and on her site FlightChic.

Jessica Macdonald

Jessica Macdonald

Expert on Lufthansa

Currently based in Scotland after living in South Africa and the United States, Jessica has been writing travel and aviation content for more than 10 years. She regularly contributes to Travel + Leisure and TripSavvy, and has had work published by Condé Nast Traveller and The Independent. She has traveled to more than 50 countries across six continents.

Good to know

Cheapest flight$256
Flight from Washington, D.C. to Charleroi Brussels

When to book flights from Washington, D.C. to Brussels

Are your dates flexible? Find out the best times to travel from Washington, D.C. to Brussels based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Washington, D.C. to Brussels flights

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

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Brussels was $256 for a one-way ticket and $468 for a round-trip.

  • Do I need a passport to fly between Washington, D.C. and Brussels?

    Yes, you’ll need a passport to travel to Brussels from Washington, D.C..

  • Which airports will I be using when flying from Washington, D.C. to Brussels?

    Washington, D.C. is served by only 1 airport and there are 2 airports in Brussels. You will leave Washington, D.C. from Washington, D.C. Dulles Intl and you will be arriving in Brussels at one of these airports: Brussels Bruxelles-National or Charleroi Brussels.

  • Which aircraft models fly most regularly from Washington, D.C. to Brussels?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Washington, D.C. to Brussels?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Washington, D.C. and Brussels, with oneworld being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Washington, D.C. to Brussels?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington, D.C. to Brussels.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington, D.C. to Brussels?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Brussels from Washington, D.C. is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington, D.C. to Brussels?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Brussels with an airline and back to Washington, D.C. with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington, D.C. to Brussels?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Brussels from Washington, D.C. up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Prefer to fly direct from Washington, D.C. to Brussels?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Washington, D.C. Dulles Intl to Brussels.
Find which airlines fly direct from Washington, D.C. Dulles Intl Airport to Brussels, which days they fly and book direct flights.

Direct departures

Washington, D.C. Dulles Intl to Brussels

Monday

United Airlines

United Airlines

Tuesday

United Airlines, Brussels Airlines

United Airlines, Brussels Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines, Brussels Airlines

United Airlines, Brussels Airlines

Friday

United Airlines, Brussels Airlines

United Airlines, Brussels Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines, Brussels Airlines

United Airlines, Brussels Airlines

See more direct flights

Direct returns

Brussels to Washington, D.C. Dulles Intl

Monday

United Airlines

United Airlines

Tuesday

United Airlines, Brussels Airlines

United Airlines, Brussels Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines, Brussels Airlines

United Airlines, Brussels Airlines

Friday

United Airlines, Brussels Airlines

United Airlines, Brussels Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines, Brussels Airlines

United Airlines, Brussels Airlines

See more direct flights

Reviews of the top 5 airlines serving from Washington, D.C. to Brussels

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Brussels. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Washington, D.C. to Brussels? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9219 reviews
7.3Comfort
8.1Crew
6.6Food
7.7Boarding
7.1Entertainment
Airline reviews

Very good. Because of the delays with my previous flight, I missed my connection, but I was able to book another flight through the United app easily.

10.0 ExcellentAnonymous, Jan 2026
IAD - ATL
Read more United Airlines reviews

Very good. Because of the delays with my previous flight, I missed my connection, but I was able to book another flight through the United app easily.

Was happy we finally got upgraded in 1st class. The seat getting old. The cushiness need some improvement.

Ineffective communication with United resulted in lost baggage. Their Baggage Tracing counter at MUC was shut down from 11:00-14:15 on my arrival. Undertrained, underinformed staff had me Running all over MUC to find someone to help me to no avail. Staff was rude, unhelpful, and unable to effectively use the systems they did have operational. They refused to contact United in any way or provide any accommodation or other resources while I waited for my luggage. This has destroyed my downstream itinerary. If they had even the slightest visibility I may have been able to reschedule/plan, but again, their staff provided nothing, and did nothing more than their website, which doesn’t even work on a standard phone browser. Miserable failure at all levels that weren’t associated with the operation of the aircraft.

Sat next to a one year old. She crawled all over the place and made me laugh.

The Crew and the food was the worst I ever had in Business Class. First they told us there were no space for carry on. It was plenty of space over our 2 row seats, we had to ask to let us travel with it which was accepted. They were aware that we had to run for the connection due to the previous flight delay. Have us one hour waiting for more customers and not even offer a glass of water. Then started the service and they started to serve other passengers drinks in business and did not offer any drinks until they serve our pre ordered meal and I ask for something to drink. I had to wait until they finished to serve all passengers until Inget something. The crew was the worts I ever had for Business Class in my life.

Not great experience - we were super late boarding due to issues with aircraft. Then when we finally all got onboard and seated and they started taxiing out to the runway they just stopped then turned around and went back to the airport. Apparently the crew “ran out of time” to legally fly us. They mentioned that they were about 2 minutes away from taking off. I understand the rules and safety but kinda wonder why they would have bothered boarding us in the first place? Had to go all the way back and de plane and then wait in a HUGE line to get a hotel (this is somewhere around 2:30am) finally got to hotel by Uber (no shuttle after 20min so gave up) and they ended up putting us all back on the same aircraft at 10am next morning so got about 2.5 hours sleep. They did give us. $250 credit, but it was a São Paulo Brazil flight out of Dulles. The flight and everything was fine.

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

7 hours delayed due to operational issues on United’s end. Basically laziness.

Short flight but an "eager to help" crew made the journey more enjoyable!

During booking, I kept trying submitting my payment from the Mexican website and it didn't work. After I had the idea to change it to the Canadian website, it worked but I had to be charged the equivalent of 50 CAD more. I received the clear instruction that I would only be able to check-in at the airport and that it was impossible to select a seat 24 hours before departure, that I had to pay 144 CAD to do so, although not only was I able to check-in 24 hours before departure, but I could have selected my seats for free then. All in all, I almost threw $200 out the window due to misleading information. Besides, the app kept crashing, the information to get to the gate on the app was inaccurate, my gate was switched and I was only informed once in the air (luckily I had noticed the departure pannel), I was not addressed in my language beforehand and even if I tried I was immediately answered in English (which meant the crew understood but didn't want to answer accordingly), there was only one snack & beverage service on my medium haul flight and no beverage service on my short haul flight. To be fair, the planes were comfortable, the crew apart from the language issue was helpful, dynamic and engaging, the plane was clean and the directions were clear and direct. United has a lot of potential to be one of my favourite airlines, but the devil is in the details and a lot of them missed the target.

Fantastic. The only thing - out of my six luggage one was lost in Copenhagen, however it was delivered Home 3 Days later so all great..

The crew was friendly, the flight was pleasant. Thank you for your service!

Our trip plan from Kayak stated we were flying SAS. That was not true. The first leg was a Delta flight. We wasted 25 minutes before finding out to check in with the correct airline. Then our SAS flight for the second leg arrived 25 minutes late, and our third leg flight with SAS closed the gate knowing the flight delay was SAS’s fault, and that this flight would only be backed up 5 minutes. The final kicker was that between Delta and SAS, they lost all our checked luggage.

Flight was completely full January 9th? I problem i had the stewardess was bumping into me constantly walking by? very annoying.. on Austrian air I dint have this issue at all...

Amazing! Everyone was so nice and the food was so good!!

Terrible customer service. The flight attendants were rude. We experienced significant turbulence for a large portion of the flight and there was very little check in from the flight deck. The space was extremely limited to the point where it felt like torture. Never again

I was surprised how good an American airline can be - I was really impressed.

Excellent service throughout. Airport process is quick and easy. Very courteous staff. Great service in the plane! Just outstanding punctuality and service overall!!

I have paid for extra legroom on my flight. My seat was broken and did not recline. The crew could not fix it and refused to provide me with another seat

Over all experience was good. However the connection time was too short at CPG. We missed our connecting flight to AMS as the passport control line was too long and by the time we got our passport control done it was too late I wish there were some SAS staff to help us out at the passport control center Though they put us in a KLM flight from CPG to AMS, That flight was also delayed by over two hours

One of the best flight experiences I've have had in along time. Would fly with them again.

Canceled my flight couple hours before takeoff. They could not find a decent re-routing and refused to pay for when i subjected alternative with Lufthansa.

Seats a little to soft on the SFO DUB flight

Well, I think we left close to on time. Crew was “eh”.

Flight takeoff was delayed an hour, but arrival time was not updated at the same time as departure time, so those picking me up at the other end were not alerted to the change in my arrival.

Seats are terribly cramped. I’m only 5’2” and my knees were practically in my face. No room to put a normal size bag under the seat and when the person in front of you reclined their seat your tray table was in your lap. This is the airline’s way of cramming more seats into the plane to make more money. I’ll think twice about taking Aer Lingus again since there are a few other options from Boston to the Emerald Isle.

Couldn’t check In online, message was couldn’t check in until Sunday morning though plane left Saturday night. Checked in okay at airport but caused slot if stress.

I had zero issues with the flight. I did have issues with the staff at the airport. We missed out flight due to a delay with another airline. Talking to the staff and trying to get a new flight arranged was challenging. One guy was able to try to help us and got us on a new flight, but other staff was dismissive and clearly let us know it wasn’t their problem. All I kept thinking was… this is why air lingus has such a poor customer service reputation. I will be avoiding this airline in the future.

Fast and sensible boarding was absolutely amazing. But extortionate wifi and seats that barely moved, making me unable to sleep, didn't do a lot of favors.

No food service. A sandwich at this hour would have been good. My 1st time on AL so didn't look into pre board purchase options.

Flight from London was delayed so missed the connecting flight. Taking 2 days to get to destination which should have only taken a few hours.

Too cramped up for the better seats I paid for.

I didn’t like my seat in my return flight from Montreal to Orlando at all; considering I paid extra for better seats. That middle seat was cramped up way too much.

Suitcase didn’t arrive to Stockholm. Chairs y comfy and not even water is offered

Bad baggage and people management at boarding forcing me to dispatch my bad despite being the perfect size and respecting everything perfectly, whereas many did not and many free empty spots on the plane as usual… making me loose time and my planned bus at arrival to go to Geneva. Costing me 100 euros extra! So Brussels airlines needs to refund me

I never board the flight. My visa was delayed and when I tried calling Kayak, no one answer and I still have not heard from anyone.

All great. Very efficient. Good emails that kept us in the know

Original flight was canceled, booked another one and find out when checking I was on the waiting list. Horrible experience

Actually this is my first time using airline I was in every single thing that happened throughout our journey, the appearance of the plane inside furnished about the seating the flight attendants and many many more I was so excited throughout thank you Brussels Airlines for the great service.

On board service was decent. I like the legroom at UA that seems to be more than in other airlines

Overall satisfied and would fly with them again. They could improve the check-in efficiency at BOS, we got backed up because it seemed there were passengers requiring much more time for check in.

Delays at check-in, seemed like they were short ground staff at the time and some passengers needed extra processing.

Problems checking in both on the laptop and on the app. No free seating available at check-in as advertised - must pay for EVERY seat between $23 and $75. No way to cancel seat choice. App menus and site menus are not responsive, and some items are impossible to find. Crew and mobile assistance are friendly and helpful.

Food - Non-Existent. You pay for everything. It is strictly Pay-to-Play!

Having been prepared for paying for everything on board other than water, coffee and tea the service was OK. Food and drink is expensive but the food was OK if limited in scope. Plane was clean and obviously well serviced. After complaining about having to walk in wind and rain to a get a bus to the airport the same thing happened at Portland. I’m sure you could get a terminal gate flight, complimentary food and drink for not much more money without traipsing through rain and slush in Reykjavik. Not bad but not great.

They had a 4 hour delay and left my luggage in Iceland and it didn’t arrive in Portland until 11/1

Iceland air transfer was bad. They lost my luggage and I just received it 11/1

It was too cold in the plane my feet froze

Handling our luggage was the biggest issue - they lost it and we got it almost 3 days later. Really threw off the beginning of our trip and we really had to change our itinerary accordingly.

Seat was hard and uncomfortable and the temperature too warm and uncomfortable.

Everything you need to know for your flight from Washington, D.C. to Brussels

Information on your arrival and departure airports