$390 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 8/3. 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
$788
Typical prices: $851-$699
Scandinavian Airlines
Mon 8/31Thu 9/10
STL - BRU • 2 stops
Cheapest one-way
$383
British Airways
Mon 8/3
STL - BRU • 2 stops
Top airlines
Cheapest • from $788 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
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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 31 - Thu, Sep 10
Scandinavian Airlines Logo
1:30 pm - 2:35 pm
STL
-
BRU
18h 05m
2 stops
Scandinavian Airlines Logo
10:20 am - 11:37 pm
BRU
-
STL
20h 17m
2 stops
$788Scandinavian Airlines
Wed, Sep 30 - Mon, Oct 5
British Airways Logo
9:35 pm - 8:25 pm
STL
-
BRU
15h 50m
1 stop
British Airways Logo
8:50 pm - 7:30 pm
BRU
-
STL
29h 40m
1 stop
$851British Airways
Wed, Sep 30 - Mon, Oct 5
British Airways Logo
9:35 pm - 8:25 pm
STL
-
BRU
15h 50m
1 stop
British Airways Logo
8:50 pm - 7:30 pm
BRU
-
STL
29h 40m
1 stop
$873British 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
$874British Airways
Wed, Sep 30 - Mon, Oct 5
British Airways Logo
9:35 pm - 8:25 pm
STL
-
BRU
15h 50m
1 stop
British Airways Logo
8:50 pm - 7:30 pm
BRU
-
STL
29h 40m
1 stop
$878British 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 - 11:25 pm
BRU
-
STL
33h 35m
2 stops
$886British Airways
Sun, Aug 23 - Sat, Sep 12
Multiple Airlines Logo
9:40 pm - 8:00 pm
STL
-
BRU
15h 20m
1 stop
Multiple Airlines Logo
8:05 pm - 7:46 pm
BRU
-
STL
30h 41m
2 stops
$887Multiple Airlines
Sun, Aug 23 - Sat, Sep 12
British Airways Logo
1:37 pm - 2:10 pm
STL
-
BRU
17h 33m
2 stops
British Airways Logo
10:40 am - 11:20 pm
BRU
-
STL
19h 40m
2 stops
$893British Airways
Mon, Aug 31 - Thu, Sep 10
United Airlines Logo
12:10 pm - 7:10 am
STL
-
BRU
12h 00m
1 stop
United Airlines Logo
9:25 am - 11:06 am
BRU
-
STL
32h 41m
2 stops
$896United Airlines
Mon, Jun 8 - Mon, Jun 22
Multiple Airlines Logo
2:15 pm - 4:25 pm
STL
-
CRL
19h 10m
2 stops
Multiple Airlines Logo
9:40 pm - 8:07 pm
CRL
-
STL
29h 27m
3 stops
$1,164Multiple 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.

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 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 $1,311 respectively.

Good to know

Cheapest flight$383
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 3 days, the lowest price for a flight from St. Louis to Brussels was $383 for a one-way ticket and $788 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 9650 reviews
8.1Crew
7.7Boarding
6.6Food
7.3Comfort
7.1Entertainment
Airline reviews

United Airline crews were very friendly and very attentive. 12 hours flight was gone like in a shorter one.

10.0 ExcellentPeter, Apr 2026
SFO - ICN
Read more United Airlines reviews

United Airline crews were very friendly and very attentive. 12 hours flight was gone like in a shorter one.

Delayed - weather wasn't bad at either end. Also sat on tarmac in ORD.

Food was surprisingly delicious. Space in the seat is horrible when the seating front is reclined. Movie offerings were terrible. Crew was friendly and helpful.

They told us yesterday APR21st that they were cleaning the plane and we got delayed. After that they said they didn't had any crew for the flight so they cancelled the flight till next day.

The crew was great. Very friendly and responsive. The plane was old, small and tight. We ran out of overhead space and I had to check. Middle seat was particularly tight.

Flight itself excellent, but delayed so missed connection & got to destination 2 hrs later

The flight crew on this leg of my trip was very friendly and pleasant. Every one of them was humorous, as well as helpful and accommodating. This group was BY FAR the best crew I’ve flown with. They deserve kudos.

boarded early to only find out that flight would sit at gate for 45 min to an hour. Landed in chicago and sat on runway for over an hour before got to gate. Total delay was extensive for a 45 min flight door to door.

The flight was delayed from take off because only one runway was operational in San Francisco.

Several missed and almost missed connections. It felt like everything was being patched together last minute without enough resources and it ended up being an extremely stressful experience that basically ruined our weekend on the west coast. What a waste.

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.

Terrible. Lost our luggage for 4 days. Did not advise passengers there was a strike in Barcelona Airport and had zero personnel on hand at airport to advise passengers on where to go to file claims. We had to fend for ourselves. No assistance at all other than an online claims submission process that we had to find out about on our own.

Lufthansa cancelled our flight from Los Angeles to Naples Italy on March 10 for scheduled flight on March 12 Very stressful experience trying to arrange alternatives. Will never fly again with Lufthansa

Everything could have been better. What needed to be wrong with United went wrong

The staff was bit rude when I asked for an extra drink after one beer, asked for one wine glass.

Very good, i got two seats for myself, and was comfortable with the blanket i got

I hated the FRA Airport. Confusing signage, including the path to Immigration and Security It seems that the airport grew haphazardly over the years. I have been through multiple WW Hubs with much better experiences.

Economy Priority seats are extremely uncomfortable. There is no way to escape the boxed in feeling, particularely because the distance between to rows are too short, the hard edge of the front row is keeping legs confined. There is no elevated place to put your feet. I am of average, European size.

Terrible. Both flights were significantly delayed, no luggage, made me check my small bag when many, many others had much larger carry-ons, not even a bottle of water . . . I will not fly Discover Airlines again.

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

Information on your arrival and departure airports