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$581 Find cheap flights from St. Louis to Brussels

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 Brussels departing on 10/8. 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
0 bags
mar. 6/4
mar. 6/11

Search hundreds of travel sites at once for deals on flights to Brussels

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Brussels, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Brussels, as well as popular online travel agencies
In the last 7 days travelers have searched 42,830,901 times on KAYAK, and here is why:

Save 22% or moreCompare multiple travel sites with one search.

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Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

Cheap flight deals from St. Louis to Brussels (STL-BRU)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Brussels 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 and deals for you by selecting your travel dates.
Choose your dates
7:10 am - 6:30 pmSTL-BRU
28h 20m2 stops
10:30 am - 11:35 pmBRU-STL
20h 05m2 stops
$581
Find Deal
mar., oct. 8 - mar., oct. 22
6:00 am - 6:30 pmSTL-BRU
29h 30m2 stops
10:30 am - 11:39 pmBRU-STL
20h 09m2 stops
$789
Find Deal
mer., août 21 - mer., août 28
6:26 pm - 2:05 pmSTL-BRU
12h 39m2 stops
5:30 pm - 10:36 pmBRU-STL
35h 06m2 stops
$791British Airways
Find Deal
mer., oct. 23 - jeu., oct. 31
12:00 pm - 6:20 amSTL-BRU
11h 20m1 stop
10:00 am - 10:07 amBRU-STL
31h 07m2 stops
$835Air Canada
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mer., août 21 - mer., août 28
12:00 pm - 6:20 amSTL-BRU
11h 20m1 stop
10:00 am - 9:05 pmBRU-STL
18h 05m1 stop
$847Air Canada
Find Deal
mer., août 21 - mer., août 28
6:02 am - 6:20 amSTL-BRU
17h 18m2 stops
7:15 pm - 2:55 pmBRU-STL
25h 40m1 stop
$865
Find Deal
mer., oct. 23 - jeu., oct. 31
3:35 pm - 9:00 amSTL-BRU
10h 25m1 stop
10:00 am - 10:07 amBRU-STL
31h 07m2 stops
$948United Airlines
Find Deal
mar., oct. 8 - mar., oct. 22
6:04 am - 2:05 pmSTL-BRU
25h 01m2 stops
9:10 pm - 5:19 pmBRU-STL
27h 09m2 stops
$1,054British Airways
Find Deal
mer., juil. 17 - mer., juil. 24
10:15 am - 9:00 amSTL-BRU
15h 45m1 stop
10:15 am - 3:40 pmBRU-STL
12h 25m1 stop
$1,229United Airlines
Find Deal
jeu., juin 20 - jeu., juin 27
12:15 pm - 7:45 amSTL-BRU
12h 30m1 stop
10:15 am - 3:49 pmBRU-STL
12h 34m1 stop
$3,092Lufthansa
Find Deal
mer., août 21 - mer., août 28

Flights from St. Louis to Brussels - Travel Insights & Trends

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

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

The average price of all flights from St. Louis to Brussels clicked on KAYAK for each day over the last 12 months.
If you are looking for a flight deal from St. Louis to Brussels, look for departures on Tuesdays and avoid leaving on a Monday, as it's usually the priciest day. When flying back from Brussels, Wednesday is the cheapest day to fly and Friday is the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from St. Louis to Brussels, 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 Brussels is February, where tickets cost $760 on average. On the other hand, the most expensive months are December and June, where the average cost of tickets is $1,642 and $1,505 respectively.

Good to know

Cheapest flight

$581
Flight from St. Louis to Brussels Airport

When to book flights from St. Louis to Brussels

Are your dates flexible? Find out the best times to travel from St. Louis to Brussels based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Brussels

  • What is the cheapest flight from St. Louis to Brussels?

    In the last 3 days, the lowest price for a flight from St. Louis to Brussels was $581 for a round-trip ticket.

  • Do I need a passport to fly between St. Louis and Brussels?

    A passport is required to fly from St. Louis to Brussels.

  • Which airports will I be using when flying from St. Louis to Brussels?

    St. Louis is served by only 1 airport and there are 2 airports in Brussels. You will leave St. Louis from Lambert-St Louis and you will be arriving in Brussels at one of these airports: Brussels Bruxelles-National or Charleroi Brussels.

  • Which aircraft models fly most regularly from St. Louis to Brussels?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Brussels?

    oneworld, and Star Alliance are the airline alliances operating flights between St. Louis and Brussels, with Star Alliance being the most commonly used for this route.

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

    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 Brussels.

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

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

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

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

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

See more FAQs

St. Louis - Brussels Flights

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St. Louis (STL)United States

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