STL - BRU

$300 Find Cheap Flights from St. Louis to Brussels Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Brussels departing on 4/24. 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
Travelers love KAYAK
41.299.237 searches in the past 7 days on KAYAK

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Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$492
Typical prices: $558-$899
Air Canada
Sat 4/11Wed 4/22
STL - BRU • 2 stops
Cheapest one-way
$300
Multiple Airlines
Fri 4/24
STL - BRU • 2 stops
Top airlines
Air Canada
Cheapest • from $492 (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 • 47% price drop
September
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 Brussels (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 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 St. Louis to Brussels

Sat, Apr 11 - Wed, Apr 22
Air Canada Logo
9:10 am - 7:10 am
STL
-
BRU
39h 00m
2 stops
Air Canada Logo
9:25 am - 9:08 pm
BRU
-
STL
42h 43m
2 stops
$492Air Canada
Wed, Mar 18 - Wed, Mar 25
Air Canada Logo
6:25 am - 7:50 am
STL
-
BRU
19h 25m
2 stops
Air Canada Logo
10:00 am - 9:15 pm
BRU
-
STL
41h 15m
2 stops
$493Air Canada
Wed, Mar 18 - Wed, Mar 25
Lufthansa Logo
11:28 am - 1:10 pm
STL
-
BRU
19h 42m
2 stops
Lufthansa Logo
9:05 am - 10:59 pm
BRU
-
STL
19h 54m
2 stops
$505Lufthansa
Sat, Apr 11 - Wed, Apr 22
Air Canada Logo
9:10 am - 7:10 am
STL
-
BRU
39h 00m
2 stops
Air Canada Logo
9:25 am - 12:22 pm
BRU
-
STL
33h 57m
2 stops
$506Air Canada
Wed, Mar 18 - Wed, Mar 25
Multiple Airlines Logo
4:05 pm - 1:15 pm
STL
-
BRU
15h 10m
2 stops
Multiple Airlines Logo
10:00 am - 3:29 pm
BRU
-
STL
35h 29m
2 stops
$511Multiple Airlines
Sat, Apr 11 - Wed, Apr 22
United Airlines Logo
2:40 pm - 7:10 am
STL
-
BRU
33h 30m
2 stops
United Airlines Logo
10:15 am - 12:22 pm
BRU
-
STL
33h 07m
1 stop
$512United Airlines
Wed, Mar 18 - Wed, Mar 25
United Airlines Logo
11:25 am - 7:55 am
STL
-
BRU
14h 30m
1 stop
United Airlines Logo
10:15 am - 9:07 pm
BRU
-
STL
16h 52m
2 stops
$514United Airlines
Wed, Mar 18 - Wed, Mar 25
United Airlines Logo
6:25 am - 7:55 am
STL
-
BRU
19h 30m
1 stop
United Airlines Logo
7:00 am - 9:07 pm
BRU
-
STL
20h 07m
2 stops
$517United Airlines
Wed, Mar 18 - Wed, Mar 25
United Airlines Logo
11:25 am - 7:55 am
STL
-
BRU
14h 30m
1 stop
United Airlines Logo
10:10 am - 9:07 pm
BRU
-
STL
16h 57m
1 stop
$609United Airlines
Tue, Mar 31 - Fri, Apr 10
Scandinavian Airlines Logo
12:04 pm - 9:40 am
STL
-
BRU
38h 36m
2 stops
Scandinavian Airlines Logo
3:15 pm - 9:06 pm
BRU
-
STL
36h 51m
2 stops
$635Scandinavian Airlines
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.

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 $494 (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 seasonJanuary
Cheapest flight$300
Best time to beat the crowds with an average 30% drop in price.
Most popular time to fly and prices are also 16% 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 $300 for a one-way ticket and $492 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.

  • Which is the best airline for flights from St. Louis to Brussels, United Airlines or Lufthansa?

    The two airlines most popular with KAYAK users for flights from St. Louis to Brussels are United Airlines and Lufthansa. With an average price for the route of $786 and an overall rating of 7.4, United Airlines is the most popular choice. Lufthansa is also a great choice for the route, with an average price of $2,205 and an overall rating of 6.8.

  • 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 airlines 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 9287 reviews
7.7Boarding
8.1Crew
6.6Food
7.1Entertainment
7.3Comfort
Airline reviews

Very disappointing given gate agent behavior. Filed a formal complaint with United.

2.0 MediocreAnnie Caroline, Feb 2026
SFO - LAX
Read more United Airlines reviews

Very disappointing given gate agent behavior. Filed a formal complaint with United.

Do not like the size of the overhead bin. I think staff should monitor the size of suitcases that are being carried on by passengers to ensure they meet the size requirement.

Crew was great (professional, attentive, prompt). Snacks for 4 hrs flight is deplorable.

Flight delayed. WiFi connectivity very poor if not existant. Last minute arrival forced me to run to catch my connection.

Both of my flights arrived early and check in process was smooth

Terrible. No customer service, no food, no drinks on a 6 hour premier economy booking.

Short flight, but no drink/snack service. The flights both going and coming were delayed.

Much better than Spirit. I was please by the easy fast check in and boarding

Check-in and in-flight staff were better than average. The seat was a fair size but too hard and not enough padding. The cushion/pillow provided is poor (thin and seems to be disposable ,it provides no effective cushioning or support). Food was OK-ish but no choice of inflight snacks and no easy place to get drinks other than water (I could ask for juice by intruding into the staff area at the back of the plane) Entertainment was very good actually. Overall better than I expected from a US-based airline (sorry!) but compared to ANA or Singapore it was so-so. (I live in Japan so they are my comparative airlines)

Everything was on time Will use united again for sure

Excellent service; they helped me reschedule so I can fly in an earlier flight

I had a good comfortable seat. There was nearly an hour delay. There was an accident with the champagne, but I was well compensated. These things happen sometimes.

Service and food were excellent. Incredibly friendly and competent staff. Flight was delayed over and hour and I had to run between terminals to get my connecting flight.

Missed it by a couple minutes and couldn’t find an alternative flight so had to spend the night in DC and after much shuffling from 1 airline to another managed to get a United to Frankfurt.

There were only 2 toilets and one of them did not work in business class. We are not allowed to cross classes so had to wait in line to use the toilets!! The entertainment touch display was finicky and did not work all the time.

We missed our flight. There was not enough time built into the layover to get through immigration, customs, bagclaim, bag rechecking, and the long trip to another terminal and gate. Kayak really screwed up. We took the bus up to Wisconsin and then were picked up in Brookfield by private car. It was lucky we didnt miss the last bus out.

I tried both on line and by calling the Customer Service line to arrange for a special meal as i have food intolerances. I was under the impression from your service representative that I was successful. I was not. I cannot eat spicy foods and get very ill if i eat bell peppers. I could not eat either menu choice and no special meal was actually ordered. ( your representative tried to order it for a flight that did not have meal service!!! - found this out later). Your wonderful cabin crew managed to put together a fruit, salad, roll and cheese tray for me so I had something to eat. WHY WOULD YOU SERVE SPICY FOOD, WITH NO MILDER OPTION,ON AN INTERNATIONAL FLIGHT???

Crew was professional and great, flight was clean. However food was pathetic. I ordered a Hindu meal assuming no meat but they served chicken. Need to be very specific- Hindu meal should be categorize as Vegetarian - no meat or egg. Or it should be specific that we are serving meat.

Late flight Delays Poor service Poor staff Worst airline ever

Ground staff and cabin crew were excellent. Flight was perfectly on time. Zero issues.

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

Information on your arrival and departure airports