STL - BRU

$329 Find Cheap Flights from St. Louis to Brussels Airport - Compare and Save

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 Brussels departing on 9/30. 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, 0 bags

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Everything you should know

Cheapest round-trip
$732
Overall average: $657
United Airlines
Mon 1/25Thu 1/28
STL - BRU • 2 stops
Cheapest one-way
$329
Multiple Airlines
Wed 9/30
STL - BRU • 3 stops
Nonstop flights
Not available
There are currently no direct flights between St. Louis and Brussels. You'll need at least 1 connection.
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Top layover airports
Frankfurt am Main (FRA)
Cheapest • Avg $776 (round-trip)
Frankfurt am Main (FRA)
Shortest trip • 11h 33m (one-way)
Insights
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When to travel
February
Cheapest • 55% price drop
March
Most popular
Good to know
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Booking Insights
Flight Deals

Cheap Flights 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 for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Brussels

Mon, Jan 25 - Thu, Jan 28
United Airlines Logo
3:15 pm - 1:15 pmSTL  Lambert-St Louis-BRU Brussels Bruxelles-National
15h 00m2 stops Chicago O'Hare Intl London Heathrow
United Airlines Logo
10:00 am - 11:09 amBRU  Brussels Bruxelles-National-STL Lambert-St Louis
32h 09m2 stops Montreal Pierre Elliott Trudeau Intl Newark
$732United Airlines
Mon, Jan 25 - Thu, Jan 28
United Airlines Logo
3:15 pm - 1:15 pmSTL  Lambert-St Louis-BRU Brussels Bruxelles-National
15h 00m2 stops Chicago O'Hare Intl London Heathrow
United Airlines Logo
10:00 am - 11:09 amBRU  Brussels Bruxelles-National-STL Lambert-St Louis
32h 09m2 stops Montreal Pierre Elliott Trudeau Intl Newark
$733United Airlines
Mon, Jan 25 - Thu, Jan 28
United Airlines Logo
11:25 am - 8:55 amSTL  Lambert-St Louis-BRU Brussels Bruxelles-National
14h 30m1 stop Chicago O'Hare Intl
United Airlines Logo
10:00 am - 11:09 amBRU  Brussels Bruxelles-National-STL Lambert-St Louis
32h 09m2 stops Montreal Pierre Elliott Trudeau Intl Newark
$736United Airlines
Mon, Sep 21 - Wed, Sep 30
Multiple Airlines Logo
8:55 am - 7:50 amSTL  Lambert-St Louis-BRU Brussels Bruxelles-National
15h 55m1 stop Toronto Pearson Intl
Multiple Airlines Logo
9:10 am - 6:41 pmBRU  Brussels Bruxelles-National-STL Lambert-St Louis
16h 31m1 stop Montreal Pierre Elliott Trudeau Intl
$744Multiple Airlines
Mon, Jan 25 - Thu, Jan 28
United Airlines Logo
1:08 pm - 8:55 amSTL  Lambert-St Louis-BRU Brussels Bruxelles-National
12h 47m1 stop Chicago O'Hare Intl
United Airlines Logo
11:55 am - 6:38 pmBRU  Brussels Bruxelles-National-STL Lambert-St Louis
13h 43m1 stop Washington, D.C. Dulles Intl
$756United Airlines
Mon, Sep 21 - Wed, Sep 30
Air Canada Logo
12:10 pm - 7:10 amSTL  Lambert-St Louis-BRU Brussels Bruxelles-National
12h 00m1 stop Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
9:10 am - 8:20 pmBRU  Brussels Bruxelles-National-STL Lambert-St Louis
18h 10m2 stops Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl
$763Air Canada
Mon, Sep 21 - Tue, Sep 29
Air Canada Logo
12:10 pm - 8:55 amSTL  Lambert-St Louis-BRU Brussels Bruxelles-National
37h 45m2 stops Montreal Pierre Elliott Trudeau Intl London Heathrow
Air Canada Logo
9:10 am - 12:13 pmBRU  Brussels Bruxelles-National-STL Lambert-St Louis
34h 03m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl
$782Air Canada
Wed, Sep 30 - Mon, Oct 5
Lufthansa Logo
1:29 pm - 11:50 amSTL  Lambert-St Louis-BRU Brussels Bruxelles-National
15h 21m2 stops Chicago O'Hare Intl Frankfurt am Main
Lufthansa Logo
7:30 pm - 1:25 pmBRU  Brussels Bruxelles-National-STL Lambert-St Louis
24h 55m1 stop Frankfurt am Main
$843Lufthansa
Sun, Dec 20 - Tue, Dec 29
Lufthansa Logo
3:40 pm - 10:10 amSTL  Lambert-St Louis-BRU Brussels Bruxelles-National
11h 30m1 stop Frankfurt am Main
Lufthansa Logo
7:30 pm - 1:45 pmBRU  Brussels Bruxelles-National-STL Lambert-St Louis
25h 15m1 stop Frankfurt am Main
$1,146Lufthansa
Mon, Aug 24 - Sat, Sep 5
Lufthansa Logo
3:30 pm - 5:30 pmSTL  Lambert-St Louis-BRU Brussels Bruxelles-National
19h 00m1 stop Frankfurt am Main
Lufthansa Logo
12:45 pm - 10:59 pmBRU  Brussels Bruxelles-National-STL Lambert-St Louis
17h 14m2 stops Munich Franz Josef Strauss Chicago O'Hare Intl
$2,158Lufthansa
Booking Insights

KAYAK's insights & trends for St. Louis to Brussels flights

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 is the cheapest month to fly from St. Louis to Brussels Bruxelles-National Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Brussels Bruxelles-National Airport, 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 Bruxelles-National Airport is February, where tickets cost $494 (return) on average. On the other hand, the most expensive months are December and November, where the average cost of round-trip tickets is $2,205 and $1,506 respectively.

Find deals

Good to know

Low season

January

Cheapest flight

$329
Best time to beat the crowds with an average 40% drop in price.
Most popular time to fly and prices are also 38% lower on average.
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 St. Louis to Brussels Airport flights

  • What is the cheapest flight from St. Louis to Brussels Bruxelles-National Airport?

    In the last 5 days, the lowest price for a flight from St. Louis to Brussels Bruxelles-National Airport was $329 for a one-way ticket and $732 for a round-trip.

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

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

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

    When flying out of St. Louis you will be using Lambert-St Louis. You will be landing at Brussels Airport, also known as Brussels Bruxelles-National.

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

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

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

    Star Alliance is the only airline alliance operating flights between St. Louis and Brussels Airport.

  • Which is the best airline for flights from St. Louis to Brussels, United Airlines or Lufthansa?

    The two airlines most popular with KAYAK users for flights from St. Louis to Brussels are United Airlines and Lufthansa. With an average price for the route of $1,014 and an overall rating of 7.4, United Airlines is the most popular choice. Lufthansa is also a great choice for the route, with an average price of $1,282 and an overall rating of 6.8.

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

    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 Airport.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Brussels Airport 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 Airport?

    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 Airport with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and BRU can sometimes prove cheaper using this method.

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

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

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

Information on your arrival and departure airports

St. Louis (STL)
Bruxelles-National (BRU)