$380 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 11/15. 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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Flight Deals

Book Cheap St. Louis to Belgium Plane Tickets

 
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

Wed, Nov 12 - Thu, Nov 27
United Airlines Logo
1:10 pm - 1:15 pmSTL-BRU
17h 05m2 stops
United Airlines Logo
10:00 am - 3:46 pmBRU-STL
36h 46m2 stops
$530United Airlines
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Wed, Nov 12 - Thu, Nov 27
Air Canada Logo
4:05 pm - 1:15 pmSTL-BRU
14h 10m2 stops
Air Canada Logo
10:00 am - 3:46 pmBRU-STL
36h 46m2 stops
$532Air Canada
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Wed, Nov 12 - Thu, Nov 27
United Airlines Logo
1:10 pm - 7:15 amSTL-BRU
11h 05m1 stop
United Airlines Logo
10:00 am - 5:39 pmBRU-STL
38h 39m2 stops
$533United Airlines
Find Deal
Thu, Nov 27 - Thu, Dec 4
Lufthansa Logo
10:00 am - 8:55 amSTL-BRU
15h 55m1 stop
Lufthansa Logo
10:10 am - 5:03 pmBRU-STL
13h 53m1 stop
$555Lufthansa
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Mon, Dec 15 - Thu, Dec 25
United Airlines Logo
3:19 pm - 1:15 pmSTL-BRU
14h 56m2 stops
United Airlines Logo
10:00 am - 5:54 pmBRU-STL
38h 54m2 stops
$625United Airlines
Find Deal
Mon, Nov 24 - Mon, Dec 1
Multiple Airlines Logo
4:05 pm - 1:15 pmSTL-BRU
14h 10m2 stops
Multiple Airlines Logo
9:10 pm - 3:29 pmBRU-STL
49h 19m2 stops
$665Multiple Airlines
Find Deal
Wed, Nov 12 - Thu, Nov 27
Lufthansa Logo
3:50 pm - 10:10 amSTL-BRU
11h 20m1 stop
Lufthansa Logo
7:30 pm - 1:55 pmBRU-STL
25h 25m1 stop
$693Lufthansa
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Fri, Jan 2 - Mon, Jan 12
British Airways Logo
10:01 am - 10:30 amSTL-BRU
41h 29m2 stops
British Airways Logo
3:00 pm - 10:59 pmBRU-STL
38h 59m2 stops
$766British Airways
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Sat, Jan 3 - Fri, Jan 9
Scandinavian Airlines Logo
9:47 am - 2:30 pmSTL-BRU
21h 43m2 stops
Scandinavian Airlines Logo
10:20 am - 8:39 pmBRU-STL
17h 19m2 stops
$1,005Scandinavian Airlines
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Sat, Jan 3 - Thu, Jan 8
Scandinavian Airlines Logo
12:55 pm - 2:30 pmSTL-BRU
18h 35m2 stops
Scandinavian Airlines Logo
3:10 pm - 8:39 pmBRU-STL
36h 29m2 stops
$1,039Scandinavian Airlines
Find Deal
Booking Insights

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 December, when the average cost of round-trip tickets is $1,234 and $1,137 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.

Good to know

Low seasonDecember
Cheapest flight$380
Best time to beat the crowds but there is an average 23% increase in price.
Most popular time to fly with an average 18% 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 8976 reviews
7.7Boarding
7.3Comfort
8.1Crew
7.1Entertainment
6.6Food
Airline reviews

The entertainment available didn’t work for anyone on the flight. Long 6 hr flight with no entertainment option and the staff didn’t know until an hour into the flight when we made sure they knew about it. They had no way to fix it.

10.0 ExcellentAnonymous, Oct 2025OGG - DEN
Read more United Airlines reviews

The entertainment available didn’t work for anyone on the flight. Long 6 hr flight with no entertainment option and the staff didn’t know until an hour into the flight when we made sure they knew about it. They had no way to fix it.

Crew seemed a bit cranky. No seatback screens. But boarding was efficient and on time and we arrived early.

The worst landing I have ever had on a domestic flight. Thought we would lose the landing gear on landing in Newark. Then we spent 40 minutes trying to position the plane in the right place to be able to get the jet way to the plane. The plane arrived stopped. The announcer was that we were there. Everybody got up, then we were told to sit back down because they had to have us towed to a different position. We got towed and then everyone stood up and they told us we were in the wrong position to sit back down again, and then we got towed to a different position This did not happen immediately. It was 30 minutes while we wandered around a small section of the tarmac in Newark close to the gate, but apparently not close enough. Horrifying experience The CAB should be investigating that flight

Food was poorly timed and not good.. Hand held snacks, really. I kept asking for water and never got any. Service was rushed for a 7-hour flight.

Boarding was organized. Old plane. Seat fairly comfortable. Business Class much too large so you don’t receive as much attention as you should considering what you pay for the seat.

Boarding was organized. Plane seats comfortable and service was attentive. Food options were good.

This was a very average flight. The seat was out of alignment so more uncomfortable than usual. The cabin felt not well maintained. But I safely got where I needed to go.

Trip was great. A wild landing in Ottawa with the wind and rain, but the pilot did a great job. Always love flying United.👍

I will never book a flight through Cheap fare. They booked me from Portland Main . And would not give me a refund, so I bought 2 tickets one for 299. From Portland Main to ORD. Then I had to buy a ticket from Oregon PDX to ORD that was another 440. So Just so you know they even told me it was there fault but no refund. Bad bussniess. I did inform United but they said they couldn't help me due to the fact I booked through Cheap Tickets. Never again. And I'm spreding the word. I let everyone know at my 50th class reunion

We were in business class. the angled seats in that class do not have a real window view & the placement of the controls are bad. But we knew that. But the food options were mediocre. The taste was fine, but the size was for a child. It’s just really feels like United is skimping on everything. Even when we were in the Polaris lounge they did not have diet sodas. They said they were out no Coke zero no Diet Coke, etc. I do not think the portion of nuts they serve on the plane could get any smaller. Really a minimal service and offer for what you’re paying for in business.

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

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