$297 Find Cheap Flights from St. Louis to Belgium

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 Belgium departing on 8/4. 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

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Best Belgium Flight Deals from St. Louis

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Brussels
Brussels1 stop$628
Brussels
Brussels1 stop$628

Cheap Flights from St. Louis to Belgium

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

Sun, Aug 3 - Tue, Aug 26
Air Canada Logo
1:30 pm - 8:00 amSTL-BRU
11h 30m1 stop
Air Canada Logo
10:00 am - 3:44 pmBRU-STL
36h 44m2 stops
$628Air Canada
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Sun, Aug 3 - Tue, Aug 26
Air Canada Logo
5:00 am - 8:00 amSTL-BRU
20h 00m2 stops
Air Canada Logo
10:00 am - 2:33 pmBRU-STL
35h 33m2 stops
$632Air Canada
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Mon, Dec 15 - Thu, Dec 25
United Airlines Logo
12:24 pm - 8:05 amSTL-BRU
12h 41m1 stop
United Airlines Logo
10:10 am - 7:25 pmBRU-STL
16h 15m1 stop
$685United Airlines
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Sun, Aug 3 - Thu, Aug 28
United Airlines Logo
1:30 pm - 8:00 amSTL-BRU
11h 30m1 stop
United Airlines Logo
10:00 am - 8:00 pmBRU-STL
17h 00m1 stop
$686United Airlines
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Tue, Aug 5 - Fri, Aug 29
Lufthansa Logo
1:04 pm - 4:15 pmSTL-BRU
20h 11m2 stops
Lufthansa Logo
7:00 am - 1:30 pmBRU-STL
13h 30m1 stop
$725Lufthansa
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Mon, Aug 4 - Wed, Aug 27
British Airways Logo
4:52 pm - 2:20 pmSTL-BRU
14h 28m2 stops
British Airways Logo
10:55 am - 8:52 pmBRU-STL
16h 57m2 stops
$729British Airways
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Tue, Aug 5 - Thu, Aug 28
Lufthansa Logo
1:04 pm - 5:15 pmSTL-BRU
21h 11m2 stops
Lufthansa Logo
8:30 am - 3:44 pmBRU-STL
14h 14m2 stops
$736Lufthansa
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Sat, Aug 2 - Wed, Aug 27
Iberia Logo
8:01 pm - 11:25 amSTL-BRU
32h 24m2 stops
Iberia Logo
7:05 am - 8:22 pmBRU-STL
20h 17m2 stops
$742Iberia
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Mon, Aug 4 - Sat, Aug 30
Iberia Logo
1:17 pm - 11:25 amSTL-BRU
15h 08m2 stops
Iberia Logo
7:05 am - 7:09 pmBRU-STL
43h 04m2 stops
$797Iberia
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Fri, Aug 1 - Tue, Aug 26
British Airways Logo
7:38 pm - 7:10 pmSTL-BRU
16h 32m2 stops
British Airways Logo
10:55 am - 11:14 pmBRU-STL
19h 19m2 stops
$938British Airways
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KAYAK's insights & trends for St. Louis to Belgium flights

Get data-powered insights and trends into flights from St. Louis to Belgium 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 Belgium?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Belgium, 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 Belgium is February, when tickets cost $690 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of round-trip tickets is $1,296 and $1,283 respectively.

What’s the cheapest day of the week to fly from St. Louis to Belgium?

The average price of all round-trip flights from St. Louis to Belgium clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Belgium on a Friday and more expensive on a Monday. On your return trip to St. Louis, you should consider flying back on a Friday, and avoid Saturdays for better deals.

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Good to know

Low seasonApril
High seasonJanuary
Cheapest flight$297
Best time to beat the crowds but there is an average 1% increase in price.
Most popular time to fly with an average 14% increase in price.
Flight from St. Louis to Brussels Airport

FAQs - booking Belgium flights

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

    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 Belgium.

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

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

    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 from St. Louis to Belgium 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 from St. Louis to Belgium?

    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 from St. Louis to Belgium 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 Belgium?

    The cheapest time of day to fly to Belgium is generally in the evening, when round-trip flights cost $1,088 on average. Morning departures are around 17% more expensive than evening flights, on average. The most expensive time of day to fly to Belgium is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $1,420.

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

 
Need help choosing which airline to fly with from St. Louis to Belgium? 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 8846 reviews
8.1Crew
6.6Food
7.7Boarding
7.3Comfort
7.0Entertainment
Airline reviews

I liked the choice of lemon ginger tea. I think stewardesses can be more considerate of older people needs.

4.0 OkayJeanette, Jul 2025IAD - TPA
Read more United Airlines reviews

I liked the choice of lemon ginger tea. I think stewardesses can be more considerate of older people needs.

The food should improve! And The flight should leave on time and not make the traveler wait.

It was great, I’m very grateful for the pilots and crew flight attendants for everything.

Everything was great. Only thing that could’ve made it better was buy on board options for hot food, but the snacks were decent. The flight attendants were great. I had no complaints. I was able to make it to my destination safely

A little bit more leg room in premium economy. I am 6’4”.

Overall it was good. I missed my connection but I was put on another flight.

The attendant were friendly. I suggest you have a medical attendant on board every flight so that in case someone is sick , he/she will help them.

The woman gate agent in Phoenix was none too sympathetic about my check-in process as I am relatively new with using apps. I almost did not get on because she said I did not check-in. I thought I had via Kayak where I purchased a very expensive ticket. Lesson learned but to be told I may not get on as a matter of factly was difficult to hear.

Overall a very poor experience - booked premium economy tickets but due to last minute flight delays , all my itinery went for a toss and had to fly economy class with no access to lounge or any compensation by united airlines to make up for the flight delays . i had expected better experience than that from united.

We love united ! We would like to acknowledge Aimee in the lounge near gate 130

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

Information on your arrival and departure airports

St. Louis (STL)

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