STL - BRU

$530 Find Cheap Flights from St. Louis to Brussels Airport

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Brussels departing on 12/8. 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 Bruxelles-National Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Brussels, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Brussels, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$530
Typical prices: $1,403-$2,299
United Airlines
Mon 12/8Mon 12/15
STL - BRU • 2 stops
Cheapest one-way
$1,027
Multiple Airlines
Thu 4/16
STL - BRU • 2 stops
Top airlines
United Airlines
Cheapest • from $530 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
February
Cheapest • 31% price drop
January
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Brussels!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from St. Louis to Bruxelles-National (STL-BRU)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Bruxelles-National 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 St. Louis to Brussels

Mon, Dec 8 - Mon, Dec 15
United Airlines Logo
11:50 am - 1:15 pmSTL-BRU
18h 25m2 stops
United Airlines Logo
10:00 am - 2:25 pmBRU-STL
35h 25m2 stops
$530United Airlines
Find Deal
Mon, Dec 8 - Mon, Dec 15
United Airlines Logo
3:19 pm - 1:15 pmSTL-BRU
14h 56m2 stops
United Airlines Logo
10:10 am - 3:40 pmBRU-STL
12h 30m1 stop
$553United Airlines
Find Deal
Mon, Dec 8 - Mon, Dec 15
United Airlines Logo
3:19 pm - 8:55 amSTL-BRU
10h 36m1 stop
United Airlines Logo
10:10 am - 3:40 pmBRU-STL
12h 30m1 stop
$556United Airlines
Find Deal
Mon, Nov 24 - Tue, Dec 2
Delta Logo
10:45 am - 9:00 amSTL-BRU
15h 15m2 stops
Delta Logo
11:00 am - 9:50 amBRU-STL
29h 50m2 stops
$561Delta
Find Deal
Mon, Nov 24 - Tue, Dec 2
Multiple Airlines Logo
6:30 am - 7:50 amSTL-BRU
18h 20m2 stops
Multiple Airlines Logo
7:30 pm - 1:55 pmBRU-STL
25h 25m1 stop
$566Multiple Airlines
Find Deal
Mon, Nov 24 - Tue, Dec 2
Multiple Airlines Logo
8:00 am - 8:55 amSTL-BRU
17h 55m1 stop
Multiple Airlines Logo
5:30 pm - 1:55 pmBRU-STL
27h 25m1 stop
$571Multiple Airlines
Find Deal
Wed, Apr 1 - Wed, Apr 8
Air Canada Logo
4:05 pm - 1:15 pmSTL-BRU
14h 10m2 stops
Air Canada Logo
10:00 am - 3:24 pmBRU-STL
36h 24m2 stops
$601Air Canada
Find Deal
Fri, Mar 27 - Tue, Mar 31
Air Canada Logo
4:05 pm - 1:15 pmSTL-BRU
15h 10m2 stops
Air Canada Logo
9:40 am - 3:24 pmBRU-STL
12h 44m1 stop
$651Air Canada
Find Deal
Wed, Nov 26 - Fri, Nov 28
Delta Logo
6:00 am - 7:35 amSTL-BRU
18h 35m2 stops
Delta Logo
8:05 am - 6:35 pmBRU-STL
17h 30m2 stops
$780Delta
Find Deal
Fri, Mar 27 - Tue, Mar 31
American Airlines Logo
2:21 pm - 10:50 amSTL-BRU
14h 29m2 stops
American Airlines Logo
10:55 am - 9:48 pmBRU-STL
17h 53m2 stops
$872American Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for St. Louis to Brussels flights

Get data-powered insights and trends into flights from St. Louis 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 St. Louis to Brussels Bruxelles-National Airport?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from St. Louis to Brussels Bruxelles-National Airport departing in December.

What’s the cheapest day of the week to fly from St. Louis to Brussels Airport?

The average price of all round-trip flights from St. Louis to Brussels Bruxelles-National Airport clicked on KAYAK for each day over the last 12 months.

When flying from St. Louis to Brussels Airport, you should consider leaving on a Friday and avoid Mondays if you are looking for the best rates. For your return to St. Louis, you’ll find the best rates on Fridays and the most expensive ones on Saturdays.

What is the cheapest month to fly from St. Louis to Brussels Bruxelles-National Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Brussels Bruxelles-National Airport, 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 St. Louis to Brussels Bruxelles-National Airport is February, where tickets cost $690 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $2,205 and $1,234 respectively.

Good to know

Low seasonApril
Cheapest flight$530
Best time to beat the crowds with an average 11% drop in price.
Most popular time to fly and prices are also 2% lower on average.
Flight from St. Louis to Brussels Airport

When to book flights from St. Louis to Brussels

Are your dates flexible? Find out the best times to travel from St. Louis 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 St. Louis to Brussels Airport flights

  • What is the cheapest flight from St. Louis to Brussels Bruxelles-National Airport?

    In the last 3 days, the lowest price for a flight from St. Louis to Brussels Bruxelles-National Airport was $1,027 for a one-way ticket and $530 for a round-trip.

  • Do I need a passport to fly between St. Louis and Brussels Airport?

    A passport is required to fly from St. Louis to Brussels Airport.

  • Which airports will I be using when flying from St. Louis to Brussels Airport?

    When flying out of St. Louis you will be using Lambert-St Louis. You will be landing at Brussels Airport, also known as Brussels Bruxelles-National.

  • Which aircraft models fly most regularly from St. Louis to Brussels Airport?

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

  • Which airline alliances offer flights from St. Louis to Brussels Airport?

    Star Alliance is the only airline alliance operating flights between St. Louis and Brussels Airport.

  • How does KAYAK find such low prices on flights from St. Louis to Brussels Airport?

    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 St. Louis to Brussels Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Brussels Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Brussels Airport from St. Louis 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 St. Louis to Brussels Airport?

    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 Airport with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and BRU can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Brussels Airport?

    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 Airport from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from St. Louis to Brussels

 
See real verified KAYAK customer reviews for airlines flying from St. Louis 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 St. Louis 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 8996 reviews
7.7Boarding
8.1Crew
6.6Food
7.3Comfort
7.1Entertainment
Airline reviews

The person I bought the ticket for didn’t make the flight.

2.0 MediocreAnonymous, Oct 2025ORF - EWR
Read more United Airlines reviews

The person I bought the ticket for didn’t make the flight.

Lately I like the planes have been exceptionally filthy. There’s lines of dust and dirt all across the ceiling in the vents, and the cracks in between the seats are literally full of food. It’s definitely not the quality of service that I was used to with United. I’m also very disappointed with the Wi-Fi! All I wanna do is knock out a few work jobs while I’m trapped in my seat And it spools so bad. They did provide me with a refund, but the process of getting that refund is so complicated. It’s unfortunate.

Another delayed flight. When the delays exceed the duration of the flight, it’s a problem.

Excellent flight. Smooth, efficient boarding. Quick flight. Arrived early at STL.

After boarding the plane in Chicago, the passengers were told that there was a technical problem with the plane. Passengers remained on the plane as they tried to fix the problem. After what was probably an hour passengers were told that there was a need to change planes as the problem was not solved. Passengers disembarked and boarded another plane. After taxing to the runway and waiting for takeoff, passengers were told that owing to the thunderstorm the flight was unable to take off but would try and reroute. After some time passengers were told there wasn't enough fuel for the new route and the plane had to return to the gate for additional fuel. after another log delay the flight got underway. On the plane there was food, drinks, ice or entertainment. We were a glass of water, which appeared rationed. Flight arrived about 5 hours late. The pilot was fantastic and communicated with the passengers throughout the ordeal.

Same as last comment. Food sucks. Quality. Not surprising most people have no clue about nourishment Clearly

Not the fault of United—weather, reroute around weather, time sitting on tarmac, arrived couple hours late, too late for train into city necessitating a much pricier cab but weather…can’t be helped.

Friendly and professional flight crew. Aside from departure delay after boarding, easy flight and smooth landing.

Great smooth flight. Had a seating change, but that was an improvement. Thanks United Airways Crew.

The flight attendants were great, I joked with one I can’t remember her name, a blond, really sweet. I thought it was run well very professional. This was great i survived Spirit, I know for which I speak.

Everything you need to know for your flight from St. Louis to Brussels

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