$581 Find Cheap Flights from St. Louis to Belgium

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Belgium departing on 11/18. 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
Brussels2 stops$581
Brussels
Brussels2 stops$581

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

Tue, Nov 18 - Tue, Nov 25
Air Canada Logo
6:43 pm - 7:55 amSTL-BRU
30h 12m2 stops
Air Canada Logo
10:00 am - 3:29 pmBRU-STL
36h 29m2 stops
$581Air Canada
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Tue, Nov 18 - Tue, Nov 25
United Airlines Logo
9:00 am - 7:55 amSTL-BRU
15h 55m2 stops
United Airlines Logo
10:10 am - 9:04 pmBRU-STL
17h 54m1 stop
$604United Airlines
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Mon, Aug 18 - Sun, Aug 24
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
$627Air Canada
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Tue, Aug 19 - Sun, Aug 24
Air Canada Logo
1:30 pm - 1:15 pmSTL-BRU
16h 45m2 stops
Air Canada Logo
10:00 am - 3:44 pmBRU-STL
36h 44m2 stops
$630Air Canada
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Sun, Aug 17 - Sun, Aug 24
United Airlines Logo
8:15 am - 7:15 amSTL-BRU
16h 00m1 stop
United Airlines Logo
10:00 am - 8:00 pmBRU-STL
17h 00m1 stop
$644United Airlines
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Wed, Sep 24 - Wed, Oct 8
Scandinavian Airlines Logo
3:30 pm - 9:40 amSTL-BRU
35h 10m2 stops
Scandinavian Airlines Logo
4:00 pm - 11:39 pmBRU-STL
38h 39m2 stops
$683Scandinavian Airlines
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Wed, Sep 24 - Wed, Oct 8
Scandinavian Airlines Logo
3:30 pm - 9:40 amSTL-BRU
35h 10m2 stops
Scandinavian Airlines Logo
4:00 pm - 11:39 pmBRU-STL
38h 39m2 stops
$684Scandinavian Airlines
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Wed, Sep 24 - Wed, Oct 8
KLM Logo
11:51 am - 8:40 amSTL-BRU
13h 49m2 stops
KLM Logo
10:45 am - 6:02 pmBRU-STL
14h 17m1 stop
$736KLM
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Wed, Sep 24 - Wed, Oct 8
KLM Logo
11:51 am - 8:40 amSTL-BRU
13h 49m2 stops
KLM Logo
10:45 am - 6:02 pmBRU-STL
14h 17m1 stop
$737KLM
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Sun, Aug 17 - Sat, Aug 23
Iberia Logo
1:37 pm - 6:55 pmSTL-BRU
22h 18m2 stops
Iberia Logo
12:05 pm - 8:58 pmBRU-STL
39h 53m2 stops
$845Iberia
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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 July and June, when the average cost of round-trip tickets is $1,322 and $1,260 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$581
Best time to beat the crowds with an average 0% drop in price.
Most popular time to fly with an average 12% 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.

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 8790 reviews
7.7Boarding
7.0Entertainment
8.1Crew
6.6Food
7.3Comfort
Airline reviews

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

2.0 MediocreAnonymous, Jun 2025LAX - SEA
Read more United Airlines reviews

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

It was fine, definitely older planes with no charging or anything. There’s no entertainment set up on board, but it is nice that they allow you to access the in flight entertainment from your phone without having to pay for the Wi-Fi and they do offer free texting.

Terrible. Out flight was delayed for 21 (twenty one) hours. United is a joke.

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

Impressed with the service despite turbulence because of the weather. Both flights arrived before their scheduled times.

Very comfortable (upgraded to business class). The audio on my screen didn’t work, but I managed to play the audio through my phone while watching the screen.

The food was the worst I’ve had on any flight I’ve ever been on.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

I was supposed to be on business class at first class from Denver back to Miami due to weather changes. I missed my connection and it’s put on a flight to Fort Lauderdale. Instead of honoring my business class/1st class ticket, they put me in coach, but there were two first class seats open. I think it’s absolutely disgusting that I paid for first class $1300 ticket and they put me in economy and they had to open seats available and I have still not been refunded the difference. I ended up having to eat a snack box instead of the meal I was supposed to get and did not get home till 2 AM so I think that’s a little pathetic that I had to live off crackers for dinner And my poor dog ate some cheese and salami. Oh yes, apparently when they switched me to the new flight they forgot to mention I had a service dog

Excellent service despite turbulence during the flight. Flight attendants were remarkable!

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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