$471 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 10/31. 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 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
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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

Wed, Dec 3 - Sun, Dec 7
American Airlines Logo
11:50 am - 9:47 pmBRU-STL
16h 57m2 stops
American Airlines Logo
9:40 am - 10:50 amSTL-BRU
18h 10m2 stops
$514American Airlines
Find Deal
Wed, Dec 3 - Sun, Dec 7
American Airlines Logo
11:50 am - 9:25 amBRU-STL
28h 35m2 stops
American Airlines Logo
9:25 am - 10:50 amSTL-BRU
18h 25m2 stops
$515American Airlines
Find Deal
Sat, Sep 27 - Sat, Oct 4
British Airways Logo
10:40 am - 8:32 pmBRU-STL
16h 52m2 stops
British Airways Logo
2:01 pm - 2:20 pmSTL-BRU
17h 19m2 stops
$516British Airways
Find Deal
Wed, Dec 3 - Sun, Dec 7
American Airlines Logo
11:50 am - 9:47 pmBRU-STL
16h 57m2 stops
American Airlines Logo
6:29 pm - 7:55 pmSTL-BRU
18h 26m2 stops
$517American Airlines
Find Deal
Fri, Aug 29 - Tue, Sep 2
 Logo
6:35 am - 8:22 pmBRU-STL
20h 47m2 stops
 Logo
12:20 pm - 2:25 pmSTL-BRU
19h 05m2 stops
Sun, Aug 31 - Sat, Sep 6
Air Canada Logo
10:00 am - 8:00 pmBRU-STL
17h 00m1 stop
Air Canada Logo
1:30 pm - 8:05 amSTL-BRU
11h 35m1 stop
$603Air Canada
Find Deal
Fri, Aug 29 - Tue, Sep 2
Air Canada Logo
10:00 am - 8:00 pmBRU-STL
17h 00m1 stop
Air Canada Logo
9:15 am - 8:05 amSTL-BRU
15h 50m2 stops
$607Air Canada
Find Deal
Wed, Dec 3 - Sun, Dec 7
Lufthansa Logo
7:00 am - 1:55 pmBRU-STL
13h 55m1 stop
Lufthansa Logo
1:00 pm - 8:55 amSTL-BRU
12h 55m1 stop
$635Lufthansa
Find Deal
Wed, Dec 3 - Sun, Dec 7
Lufthansa Logo
7:00 am - 1:55 pmBRU-STL
13h 55m1 stop
Lufthansa Logo
11:50 am - 8:05 amSTL-BRU
13h 15m1 stop
$636Lufthansa
Find Deal
Fri, Aug 29 - Tue, Sep 2
 Logo
10:00 am - 8:00 pmBRU-STL
17h 00m1 stop
 Logo
11:27 am - 7:45 amSTL-BRU
13h 18m1 stop
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.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights to St. Louis, 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 to St. Louis is May, where tickets cost $435 on average for return flights. On the other hand, the most expensive months are November and April, where the average cost of tickets from Belgium is $1,923 and $910 respectively. For one-way flights, the best month to travel is May with an average price of $435.

Good to know

Low seasonFebruary
Cheapest flight$471
Best time to beat the crowds with an average 33% drop in price.
Most popular time to fly and prices are also 8% lower on average.
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.

  • What is the cheapest day to fly to St. Louis?

    Based on KAYAK data, the cheapest day to fly to St. Louis is Friday where round-trip tickets can be as cheap as $710. On the other hand, the most expensive day to fly is Saturday, where round-trip prices are $738 on average.

  • 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.

  • What is the cheapest time of day to fly to St. Louis?

    The cheapest time of day to fly to St. Louis is generally in the morning, when round-trip flights cost $732 on average. The most expensive time of day to fly to St. Louis is generally in the morning, which is peak travel time and where the average cost of a ticket is $732.

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

    Each week there are around 1,560 direct flights from within Belgium to St. Louis. The most common day for departures is Sunday, with 17% 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.
6.6
British AirwaysOverall score based on 7267 reviews
7.6Crew
6.4Entertainment
6.3Food
6.9Boarding
6.7Comfort
Airline reviews

Checking in prior on line and wait time at Gatwick was terrible. I would rate a big fat ZERO.

10.0 ExcellentAnonymous, Aug 2025LGW - TPA
Read more British Airways reviews

Checking in prior on line and wait time at Gatwick was terrible. I would rate a big fat ZERO.

There was a slight delay. Otherwise, everything else was satisfactory.

The company that I bought my tickets through, Cheapflightsfares, failed to provide my confirmation information in a timely manner, so I was unable to check on at the country and therefore unable to make my flight. As a matter of fact, I STILL have not received the confirmation. After having read more and more reviews about the company, Cheapflightsfares appears to have scammed hundreds of hopeful travelers out of thousands of dollars. Please look into this company and, for the sake of anyone planning their next trip, stop allowing them to do business through you.

I checked in to bags, one arrived one was delayed. I did not receive the bag for 4 days - arrived on Tuesday, received bag on Saturday!

It was ok. Our flight was delayed 2 hours, and then again on arrival. The explanation given felt feeble.

The plane was known to be late in advance of takeoff. My guess is that it was known to be late at 11am or 5 hours before scheduled takeoff time. We were late to leave and with a wheelchair and the a cart, we only made it to gate. We raced! Inside plane, all was great

The booking agent, cheapflightsfares, messed up, and the information for the seats we paid extra for was not sent to American Airlines. We were separated on the return flight and sent to the lowest economy section. The flight attendant helped arrange seating at the back of the plane to allow my wife and me to sit together.

I liked the comfort of the seats, very attentive crew, and the meals were excellent.

We were kicked off this flight by British Airways due to delays on our connecting flight also operated by British airways and were rebooked on a different carrier which delayed our arrival home by > 26 hours.

Everything about the flight check-in was smooth no line the plane is clean and bathroom

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
Glencoe
Shrewsbury

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

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

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