$338 Find Cheap Flights from Belgium to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to St. Louis departing on 3/1. 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
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results for flights to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to St. Louis, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

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
$614
KLM
Fri 1/30Tue 2/3
BRU - STL • 2 stops
Cheapest one-way
$338
Multiple Airlines
Sun 3/1
BRU - STL • 3 stops
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to St. Louis!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Belgium to St. Louis

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Belgium to St. Louis 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 Belgium to St. Louis

Fri, Jan 30 - Tue, Feb 3
KLM Logo
2:45 pm - 11:37 pm
BRU
-
STL
15h 52m2 stops
KLM Logo
3:31 pm - 2:15 pm
STL
-
BRU
15h 44m2 stops
$614KLM
Fri, Jan 30 - Tue, Feb 3
Multiple Airlines Logo
11:45 am - 9:15 pm
BRU
-
STL
16h 30m2 stops
Multiple Airlines Logo
9:25 am - 7:00 pm
STL
-
BRU
26h 35m2 stops
$640Multiple Airlines
Fri, Jan 30 - Tue, Feb 3
Multiple Airlines Logo
7:00 am - 1:55 pm
BRU
-
STL
13h 55m1 stop
Multiple Airlines Logo
12:44 pm - 7:15 am
STL
-
BRU
11h 31m1 stop
$664Multiple Airlines
Fri, Jan 30 - Tue, Feb 3
Multiple Airlines Logo
7:00 am - 1:55 pm
BRU
-
STL
13h 55m1 stop
Multiple Airlines Logo
6:40 pm - 7:50 am
STL
-
BRU
30h 10m2 stops
$668Multiple Airlines
Sun, Mar 29 - Fri, Apr 10
Delta Logo
6:20 am - 8:42 pm
BRU
-
STL
21h 22m2 stops
Delta Logo
6:04 am - 7:40 am
STL
-
BRU
18h 36m1 stop
$709Delta
Sun, Mar 29 - Fri, Apr 10
Delta Logo
6:20 am - 8:42 pm
BRU
-
STL
21h 22m2 stops
Delta Logo
6:32 am - 7:40 am
STL
-
BRU
18h 08m2 stops
$713Delta
Sun, Mar 29 - Fri, Apr 10
Multiple Airlines Logo
9:20 pm - 3:24 pm
BRU
-
STL
25h 04m2 stops
Multiple Airlines Logo
4:05 pm - 1:15 pm
STL
-
BRU
14h 10m2 stops
$761Multiple Airlines
Sun, Mar 29 - Fri, Apr 10
Multiple Airlines Logo
6:20 am - 8:42 pm
BRU
-
STL
21h 22m2 stops
Multiple Airlines Logo
7:03 am - 7:40 am
STL
-
BRU
17h 37m1 stop
$795Multiple Airlines
Sun, Mar 29 - Fri, Apr 10
United Airlines Logo
10:15 am - 9:08 pm
BRU
-
STL
17h 53m1 stop
United Airlines Logo
7:45 am - 9:00 am
STL
-
BRU
18h 15m1 stop
$870United Airlines
Sun, Mar 29 - Fri, Apr 10
Multiple Airlines Logo
7:00 am - 1:25 pm
BRU
-
STL
13h 25m1 stop
Multiple Airlines Logo
3:30 pm - 10:10 am
STL
-
BRU
11h 40m1 stop
$955Multiple Airlines
Booking Insights

KAYAK's insights & trends for flights to St. Louis

Get data-powered insights and trends for flights to St. Louis to help you find the cheapest flights, the best time to fly and much more.

How long is the flight to St. Louis?

The duration of your flight to St. Louis depends on your departure and arrival airports. Obviously any flights that include a layover will also be longer. The most popular route to St. Louis on KAYAK is from Brussels, which takes 15h 52m.

How many direct flights to St. Louis are there each day?

There are around 191 direct flights from within Belgium to St. Louis every day. Most flights depart in the morning, with 8:00 am the most common departure time and 47% of flights departing in the morning.

Find deals

Good to know

Low seasonMay
Cheapest flight$338
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly with an average 4% increase in price.
Flight from Brussels to St. Louis

FAQs - booking St. Louis flights

  • How far is Lambert-St Louis Airport from central St. Louis?

    Central St. Louis is 13 miles away from Lambert-St Louis Airport.

  • What is the name of St. Louis’s airport?

    When flying to St. Louis, you'll arrive at Lambert-St Louis Airport (STL). The airport is also known as Lambert Field, Lambert-St Louis, St. Louis Lambert, or St. Louis Lambert Intl.

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

    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 to St. Louis.

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

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

    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 St. Louis with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight to St. Louis?

    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 St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • How many direct flights to St. Louis are there each week?

    Each week there are around 1,337 direct flights from within Belgium to St. Louis. The most common day for departures is Monday, with 16% of flights taking off on this day.

Top tips for finding cheap flights to St. Louis

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest St. Louis flight deals.

Reviews of the top airline flying from Belgium to St. Louis

 
See real verified KAYAK customer reviews for airlines flying to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Belgium to St. Louis. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to St. Louis? 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 9143 reviews
8.1Crew
6.6Food
7.3Comfort
7.7Boarding
7.1Entertainment
Airline reviews

I like flying first class, and United has a nice one

10.0 ExcellentMitchell, Jan 2026
IAH - BOS
Read more United Airlines reviews

I like flying first class, and United has a nice one

Flight was delayed 45 minutes because originating flight was coming from Newark. No complimentary snacks were offered on this 5+ hour flight. No screens for the flight, but movies offered if you had already downloaded the United app (which I hadn't on my ipad). No USB ports, only a flimsy plug-in port near the bottom of the seat that was hard to see and kept coming unplugged.

It was good but only meal served is very less. Meantime good to add rice and chicken in one of meal

Teeny tiny bathrooms, crew was not realistic about when we'd arrive.

Check-in, boarding and the flight from Phoenix to Houston was quick and easy. The flight from Houston to Shreveport was delayed 5 hours. It was frustrating but I think United handled it the best they could.

They lost my luggage, so, not happy. The crew was nice but my suitcases never made it, still trying to find out what happened!

The staff was hospitable and professional. The seat had a bit of wear. The winner shade was stuck 1/4 open. I received the best of both worlds. The morning sun was able to come in and blind the screen i was trying to use while at the same time it was too low to look out and enjoy the view. Rather embarrassing for a 1st class ticket.

On the way my flight entertainment wouldn’t work the screen went black and no matter how many times I tried to turn it on it wouldn’t. Food was surprisingly good but the tray tables were tiny so you couldn’t get anything else on the table. The seats hardly go back and are not overly comfortable. Wouldn’t fly United again.

Perfect flight. Smooth flight. Arrived 20 minutes early at destination. Excellent service.

The flights were on time which was great give. It was holiday travel season and there’d been some weather issues. The only complaint and this is every time with United is the terrible seat design. The head rest is not built for comfort and having my neck bent forward for a cross country trip reminded me while I try not to take United flights as a rule.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
O'Fallon
Wentzville
Farmington
Eureka
Litchfield
Grafton
Shrewsbury
Glencoe

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

Information on the airport you'll fly into in St. Louis

St. Louis (STL)