STL - BRU

$632 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 11/28. 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

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 (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

Fri, Nov 28 - Wed, Dec 3
United Airlines Logo
3:15 pm - 8:55 amSTL-BRU
10h 40m1 stop
United Airlines Logo
10:00 am - 11:20 amBRU-STL
32h 20m2 stops
$632United Airlines
Find Deal
Fri, Nov 28 - Wed, Dec 3
United Airlines Logo
1:00 pm - 7:15 amSTL-BRU
11h 15m1 stop
United Airlines Logo
11:15 am - 4:51 pmBRU-STL
12h 36m1 stop
$655United Airlines
Find Deal
Fri, Nov 28 - Wed, Dec 3
Lufthansa Logo
11:49 am - 8:05 amSTL-BRU
13h 16m1 stop
Lufthansa Logo
7:00 am - 1:55 pmBRU-STL
13h 55m1 stop
$675Lufthansa
Find Deal
Wed, Sep 24 - Wed, Oct 8
Air Canada Logo
1:30 pm - 8:05 amSTL-BRU
11h 35m1 stop
Air Canada Logo
10:00 am - 7:57 pmBRU-STL
16h 57m1 stop
$729Air Canada
Find Deal
Wed, Sep 24 - Wed, Oct 8
Air Canada Logo
1:30 pm - 8:05 amSTL-BRU
11h 35m1 stop
Air Canada Logo
10:00 am - 7:57 pmBRU-STL
16h 57m1 stop
$730Air Canada
Find Deal
Wed, Sep 24 - Wed, Oct 8
KLM Logo
11:51 am - 8:40 amSTL-BRU
13h 49m2 stops
KLM Logo
10:45 am - 6:02 pmBRU-STL
14h 17m1 stop
$734KLM
Find Deal
Wed, Sep 24 - Wed, Oct 8
KLM Logo
11:51 am - 8:40 amSTL-BRU
13h 49m2 stops
KLM Logo
10:45 am - 6:02 pmBRU-STL
14h 17m1 stop
$736KLM
Find Deal
Fri, Sep 19 - Sun, Sep 28
 Logo
4:05 pm - 1:15 pmSTL-BRU
14h 10m2 stops
 Logo
10:00 am - 7:38 pmBRU-STL
16h 38m2 stops
Thu, Jul 31 - Thu, Aug 7
 Logo
1:30 pm - 8:00 amSTL-BRU
11h 30m1 stop
 Logo
10:25 am - 8:00 pmBRU-STL
16h 35m2 stops
Wed, Jul 23 - Mon, Jul 28
Lufthansa Logo
8:15 am - 7:15 amSTL-BRU
16h 00m1 stop
Lufthansa Logo
7:30 pm - 3:47 pmBRU-STL
27h 17m2 stops
$1,253Lufthansa
Find Deal
Useful Info

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 July and June, where the average cost of round-trip tickets is $1,283 and $1,260 respectively.

Good to know

Low seasonApril
High seasonJanuary
Cheapest flight$632
Best time to beat the crowds with an average 0% drop in price.
Most popular time to fly with an average 12% 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 $1,862 for a one-way ticket and $632 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?

    oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between St. Louis and Brussels Airport, with SkyTeam 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.

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 8810 reviews
7.7Boarding
7.0Entertainment
6.6Food
8.1Crew
7.3Comfort
Airline reviews

Gate agent did not hold flight for connection, provided no assistance to get new flight

2.0 MediocreJack, Jun 2025SAT - IAH
Read more United Airlines reviews

Gate agent did not hold flight for connection, provided no assistance to get new flight

Evidently, my seat had the only broken TV. I couldn’t plug it in, get it to come on, or watch anything, and of course, no one could fix it while we were on the plane. The service was good and the boarding was quick

United airlines, mediocre at best. No issues , nothing great . Worked for me

Boarding experience was smooth. Flight attendants were friendly and helpful. Entertainment system on the Houston-Edmonton flight did not function for passengers on the left side of the aisle. On the bird's eye flight from Quito to Houston, they should not serve a meal. No one needs to eat after midnight and it is disturbing for those passengers trying to sleep.

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

It was fine, definitely older planes with no charging or anything. There’s no entertainment set up on board, but it is nice that they allow you to access the in flight entertainment from your phone without having to pay for the Wi-Fi and they do offer free texting.

Terrible. Out flight was delayed for 21 (twenty one) hours. United is a joke.

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

Impressed with the service despite turbulence because of the weather. Both flights arrived before their scheduled times.

Very comfortable (upgraded to business class). The audio on my screen didn’t work, but I managed to play the audio through my phone while watching the screen.

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

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