STL - BRU

$716 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 8/1. 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

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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Flights Deals

Cheap Flights from St. Louis to Bruxelles-National

 
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.

Recent round-trip flight deals from St. Louis to Brussels

KAYAK's recommended round-trip deals from the most popular airlines that fly from St. Louis to Brussels.
Discover the best prices for you by selecting your travel dates on KAYAK.
Air Canada Logo
5:30 pm - 7:50 amSTL-BRU
55h 20m2 stops
Air Canada Logo
10:00 am - 8:00 pmBRU-STL
17h 00m1 stop
$716Air Canada
Find Deal
Fri, Aug 1 - Wed, Aug 13
United Airlines Logo
5:00 am - 8:50 amSTL-BRU
20h 50m1 stop
United Airlines Logo
10:00 am - 8:00 pmBRU-STL
17h 00m1 stop
$759United Airlines
Find Deal
Fri, Aug 1 - Wed, Aug 13
Air Canada Logo
8:00 am - 8:00 amSTL-BRU
17h 00m2 stops
Air Canada Logo
10:00 am - 8:00 pmBRU-STL
17h 00m1 stop
$949Air Canada
Find Deal
Wed, Jul 23 - Mon, Jul 28
Air Canada Logo
9:15 am - 7:50 amSTL-BRU
15h 35m1 stop
Air Canada Logo
10:00 am - 8:00 pmBRU-STL
17h 00m1 stop
$951Air Canada
Find Deal
Wed, Jul 23 - Mon, Jul 28
Lufthansa Logo
1:20 pm - 5:30 pmSTL-BRU
21h 10m2 stops
Lufthansa Logo
4:25 pm - 3:47 pmBRU-STL
30h 22m2 stops
$952Lufthansa
Find Deal
Wed, Jul 23 - Mon, Jul 28
Air Canada Logo
9:15 am - 8:00 amSTL-BRU
15h 45m2 stops
Air Canada Logo
10:00 am - 3:16 pmBRU-STL
36h 16m2 stops
$957Air Canada
Find Deal
Wed, Jul 23 - Mon, Jul 28
British Airways Logo
7:30 pm - 7:35 pmSTL-BRU
17h 05m2 stops
British Airways Logo
9:15 pm - 7:35 pmBRU-STL
29h 20m2 stops
$993British Airways
Find Deal
Mon, May 26 - Mon, Jun 9
United Airlines Logo
1:30 pm - 8:05 amSTL-BRU
11h 35m1 stop
United Airlines Logo
10:00 am - 2:53 pmBRU-STL
35h 53m2 stops
$996United Airlines
Find Deal
Mon, May 26 - Mon, Jun 9
Air Canada Logo
1:30 pm - 8:05 amSTL-BRU
11h 35m1 stop
Air Canada Logo
10:00 am - 7:58 pmBRU-STL
16h 58m1 stop
$1,009Air Canada
Find Deal
Mon, May 26 - Mon, Jun 9
United Airlines Logo
1:30 pm - 8:00 amSTL-BRU
11h 30m1 stop
United Airlines Logo
10:00 am - 3:30 pmBRU-STL
36h 30m2 stops
$1,176United Airlines
Find Deal
Fri, Jun 13 - Fri, Jun 20
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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.

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 June and July, where the average cost of round-trip tickets is $1,343 and $1,322 respectively.

Good to know

Low seasonSeptember
High seasonJanuary
Cheapest flight$716
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 6% increase in price.
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 $1,826 for a one-way ticket and $716 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, and oneworld are the airline alliances operating flights between St. Louis and Brussels Airport, with Star Alliance being the most commonly used for this route.

  • 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.

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 8696 reviews
7.7Boarding
7.1Entertainment
8.1Crew
7.3Comfort
6.6Food
Airline reviews

Everything is good except the dinner and breakfast. The sandwich is very delicious. Toilet is clean, I only use one of them. Flight attendants are very nice. 👍👍

10.0 ExcellentAnonymous, Apr 2025SFO - HKG
Read more United Airlines reviews

Everything is good except the dinner and breakfast. The sandwich is very delicious. Toilet is clean, I only use one of them. Flight attendants are very nice. 👍👍

A bit rush for transit. Food and entertainment are not available

Boarding was a little difficult. The gate area at O'Hare was very small and crowded due to multiple gates in the area. Could not hear the intercom, so had to rely on signage to see when my group was boarding and the signage was blocked by passengers standing in the gate. Flight was great and we arrived in Montreal on time.

Multiple delays and not straight answer from the United team

For economy, it was very good. Staff was great, they even let some of us change seats for more leg room... Put an empty seat between us which was fantastic for a 12hr flight. Onboard entertainment was excellent, I think over 200 choices of movies/tv/etc The bad was the barely/nonfunctional wifi that cost either $16.99 or 1700 miles (full flight). It was atrocious... Definitely the worst of the last 3 long haul major airlines I was on the last few months.

Stewardess spilled orange juice on my clothes/seat no help no apology just threw napkins at me to clean the mess up. Not Happy.

Smooth flight. Boarding was chaotic. Could not hear the gate agent over the intercom. People were lined up in the wrong lines. Groups one and two were told to board through line one and group 3 through line 2. All very confusing. Once in the air, the flight was smooth. There was no entertainment option on this aircraft, even though it was a larger aircraft.

The plane pushed back from the gate on time. However, it stopped on the ramp, and we waited for over 20 minutes before the aircraft pulled back to the gate. Apparently, something of importance had to be removed from the aircraft by the gate agent. I found this to be odd. The delay was not significant, but I felt that whatever was on the aircraft that had to be taken off, should’ve been done before we pushed back from the gate.

I didn’t get on plane. Passport being processed by consulate with visa application. Tried to cancel through underpricer after purchasing cacelling for any reason. No dice, they are thieves.

Electric plugs didn't work. Entertainment system wasn't working

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

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