$328 Find Cheap Flights from St. Louis 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 St. Louis to Brussels departing on 6/25. 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 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
$838
Typical prices: $1,006-$699
Scandinavian Airlines
Mon 8/24Sat 9/5
STL - BRU • 2 stops
Cheapest one-way
$328
Air Canada
Thu 6/25
STL - BRU • 1 stop
Top airlines
Cheapest • from $838 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
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+1
Airline reviews
Airline reviews
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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

Mon, Aug 24 - Sat, Sep 5
Scandinavian Airlines Logo
3:39 pm - 7:50 pm
STL
-
BRU
21h 11m
2 stops
Scandinavian Airlines Logo
8:30 pm - 8:50 pm
BRU
-
STL
31h 20m
2 stops
$838Scandinavian Airlines
Wed, Sep 30 - Mon, Oct 5
Multiple Airlines Logo
6:06 am - 10:35 pm
STL
-
BRU
33h 29m
2 stops
Multiple Airlines Logo
7:05 pm - 11:41 pm
BRU
-
STL
35h 36m
2 stops
$889Multiple Airlines
Wed, Sep 30 - Mon, Oct 5
Multiple Airlines Logo
7:44 am - 6:20 pm
STL
-
BRU
27h 36m
2 stops
Multiple Airlines Logo
7:05 pm - 7:46 pm
BRU
-
STL
31h 41m
2 stops
$890Multiple Airlines
Wed, Sep 30 - Mon, Oct 5
Multiple Airlines Logo
10:14 am - 6:20 pm
STL
-
BRU
25h 06m
2 stops
Multiple Airlines Logo
7:05 pm - 11:41 pm
BRU
-
STL
35h 36m
2 stops
$891Multiple Airlines
Mon, Aug 24 - Sat, Sep 5
British Airways Logo
3:35 pm - 2:25 pm
STL
-
BRU
15h 50m
2 stops
British Airways Logo
10:40 am - 11:59 pm
BRU
-
STL
20h 19m
2 stops
$908British Airways
Wed, Sep 30 - Mon, Oct 5
British Airways Logo
9:35 pm - 3:05 pm
STL
-
BRU
10h 30m
1 stop
British Airways Logo
8:50 pm - 7:30 pm
BRU
-
STL
29h 40m
1 stop
$912British Airways
Wed, Sep 30 - Mon, Oct 5
British Airways Logo
9:35 pm - 3:05 pm
STL
-
BRU
10h 30m
1 stop
British Airways Logo
8:50 pm - 7:30 pm
BRU
-
STL
29h 40m
1 stop
$913British Airways
Wed, Sep 30 - Mon, Oct 5
Lufthansa Logo
1:29 pm - 9:00 am
STL
-
BRU
12h 31m
1 stop
Lufthansa Logo
7:30 pm - 9:24 pm
BRU
-
STL
32h 54m
2 stops
$918Lufthansa
Wed, Sep 30 - Mon, Oct 5
Lufthansa Logo
3:30 pm - 1:40 pm
STL
-
BRU
15h 10m
1 stop
Lufthansa Logo
9:15 pm - 1:25 pm
BRU
-
STL
23h 10m
2 stops
$945Lufthansa
Wed, Sep 30 - Mon, Oct 5
Lufthansa Logo
3:30 pm - 11:50 am
STL
-
BRU
13h 20m
1 stop
Lufthansa Logo
7:30 pm - 1:25 pm
BRU
-
STL
24h 55m
2 stops
$946Lufthansa
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?

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 departing in August.

What is the cheapest month to fly from St. Louis to Brussels?

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, 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 is April, where tickets cost $414 (return) on average. On the other hand, the most expensive months are June and May, where the average cost of round-trip tickets is $1,260 and $1,053 respectively.

Good to know

Cheapest flight$328
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 flights from St. Louis to Brussels

  • What is the cheapest flight from St. Louis to Brussels?

    In the last 7 days, the lowest price for a flight from St. Louis to Brussels was $328 for a one-way ticket and $838 for a round-trip.

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

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

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

    St. Louis is served by only 1 airport and there are 2 airports in Brussels. You will leave St. Louis from Lambert-St Louis 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 St. Louis to Brussels?

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

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

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

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

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Brussels 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?

    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 St. Louis with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis 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 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 9752 reviews
6.6Food
7.7Boarding
7.3Comfort
7.1Entertainment
8.1Crew
Airline reviews

Lost of requested seat assignments. Lost my husband's meal choice

6.0 GoodAnonymous, May 2026
SFO - ZRH
Read more United Airlines reviews

Lost of requested seat assignments. Lost my husband's meal choice

6 1/2 hours from Tampa to SFO on a Boeing 737. Cramped. No Service. No real food. One pass for coffee at the beginning and a second pass THREE hours later. And check-in in Tampa was nasty even by United standards. And I am at almost TWO million miles on United. It's a non-stop. But terrible service.

MY FAMILY'S LUGGAGE WAS LOST FROM ROME TO BARI. I WAS THE ONLY ONE THAT RECEIVED MY LUGGAGE FROM ROME TO BARI. AFTER DEPLANING IN BARI, WE WASTED A LOT OF TIME AT BAG CLAIMS LOST AND FOUND REPORTING THE CLAIM AND PLEADING FOR THE BAGS TO BE DELIVERED THE NEXT DAY. WE WERE TOLD THAT IT TAKES 3 DAYS MINIMUM TO DELIVER. MY DAUGHTER AND MY GIRLFRIEND NEEDED THEIR PERSONAL THINGS AND WE WERE STAYING 3 HOURS AWAY FROM THE BARI AIRPORT. WE HAD TO DRIVE 3 HOURS TO THE AIRPORT TO COLLECT OUR LOST LUGGAGE THE NEXT DAY. WE ARE NOT HAPPY WITH THE EXPERIENCE

We had a delay, but thankfully I made it to my connection. Overall it went smooth

The flight had a delay but I made it to my connection. Flight was smooth overall

As I wrote earlier, poor planning and/or communication. At least twice, we were told that we would be boarding in less than ten minutes, only to have the flight again delayed at least another hour.

This flight is a quick way to get to Chicago, but a bit expensive.

Very comfortable seating and the Flight staff were very attentive. The premium economy section that I was seated in was very clean, updated, and well appointed. I would highly recommend flying United Airlines as this experience was better than the Japan Airlines business class that I flew several months ago.

Our flight was canceled same day and we were never informed. Had to pay more and worse seating on another airline.

Our flight to Rome, Italy was cancelled the day of and we were never informed. We only found out because I was trying to get into my husbands account and called to get his account number. Had to pay more for worse seating on another airline.

In my first flight with Air Canada we sat in the plane for 4:00pm to 6:30pm. Finally we were asked to get off the plane and we were told the flight was cancelled after 7:00pm There was o clear explanation of what was the problem. I was booked without my permission on a Delta Flight at 7:30pm that was leaving at 8:00pm and I still had to go get my luggage(my final destination was Rome with one stop in Toronto. The luggage claim for Canada was closed so had to return to finally get it on the luggage belt.. Of course I missed the Delta flight and all the next day flights were booked. I also lost what I paid for my stay in Rome because I did nt cancel in time. A complete nightmare.

Good food, overall very comfy. The flight was full so obviously not optimal, but it is what it is.

Perfect airline, super friendly, great service, tasty food. Would fly again.

Parents with permanently crying baby on board. Neither parents nor crew did anything to calm the baby. The food was extremely disappointing. Seafood stew was very, very small! Not even appetizer size! Seat had a gap in the back. Had to use a pillow to fill it.

Food choices limited & not enticing Seats quite uncomfortable & difficult to control

Definitely get premium economy on a flight this long if you can. Your legs and while body will thank you.

Flight was delayed by several hours and then cancelled due to weather. But Staff was very helpful getting me on a different flight. United should offer food coupons and tooth brush and paste for stranded passengers

I upgraded to the business class cabin. It was the poorest business class I have ever experienced. No access to any business lounge in Tampa airport. Seats are not comfortable. I had a window seat and had to step/crawl over the next seat. Food was mediocre and service below average for business class. Bathroom location was ridiculous. No place to wait. I cannot believe I paid this kind of money and will never fly Lufthansa Discover again. They really should reimburse me somehow.

Boarding was disorganized. The door to one to the toilets wouldn’t lock. The plane was shockingly cramped, and clearly used for domestic flights due to the menus for items to sell domestic travelers. United should be ashamed of its small seats, tiny unclean toilets, and money grubbing stance toward services, compared to Lufthansa, Emirates, and most international carriers United is awful.

Was never allowed on and not refunded the full amount of the ticket plus charged a $300 processing fee.

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

Information on your arrival and departure airports