STL - BRU

$483 Find Cheap Flights from St. Louis to Brussels Airport

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 2/21. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Brussels Bruxelles-National Airport

 
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
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Everything you should know

Cheapest round-trip
$483
Overall average: $512
Multiple Airlines
Sat 2/21Sun 3/1
STL - BRU • 2 stops
Cheapest one-way
Multiple Airlines
Mon 1/5
STL - BRU • multi-stop
When to travel
February
Cheapest • 45% price drop
September
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Brussels!
Flight Deals
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

Sat, Feb 21 - Sun, Mar 1
Multiple Airlines Logo
4:05 pm - 1:15 pm
STL
-
BRU
14h 10m2 stops
Multiple Airlines Logo
7:00 am - 1:55 pm
BRU
-
STL
13h 55m1 stop
$483Multiple Airlines
Sat, Feb 21 - Sun, Mar 1
Lufthansa Logo
12:15 pm - 7:15 am
STL
-
BRU
12h 00m1 stop
Lufthansa Logo
11:15 am - 12:05 am
BRU
-
STL
19h 50m1 stop
$487Lufthansa
Wed, Mar 18 - Wed, Mar 25
United Airlines Logo
4:05 pm - 1:15 pm
STL
-
BRU
15h 10m2 stops
United Airlines Logo
10:00 am - 2:42 pm
BRU
-
STL
34h 42m2 stops
$489United Airlines
Sat, Feb 21 - Sun, Mar 1
United Airlines Logo
11:25 am - 7:15 am
STL
-
BRU
12h 50m2 stops
United Airlines Logo
11:55 am - 9:05 pm
BRU
-
STL
16h 10m2 stops
$500United Airlines
Wed, Feb 18 - Wed, Feb 25
Multiple Airlines Logo
9:55 am - 7:50 am
STL
-
BRU
14h 55m2 stops
Multiple Airlines Logo
10:10 am - 9:40 pm
BRU
-
STL
18h 30m1 stop
$503Multiple Airlines
Thu, Feb 19 - Thu, Feb 26
United Airlines Logo
2:45 pm - 1:15 pm
STL
-
BRU
15h 30m2 stops
United Airlines Logo
10:10 am - 9:05 pm
BRU
-
STL
17h 55m1 stop
$505United Airlines
Wed, Feb 18 - Wed, Feb 25
Air Canada Logo
7:41 am - 7:50 am
STL
-
BRU
17h 09m2 stops
Air Canada Logo
10:00 am - 9:40 pm
BRU
-
STL
18h 40m2 stops
$507Air Canada
Thu, Feb 19 - Thu, Feb 26
United Airlines Logo
9:55 am - 8:55 am
STL
-
BRU
16h 00m1 stop
United Airlines Logo
10:10 am - 4:02 pm
BRU
-
STL
12h 52m1 stop
$509United Airlines
Thu, Mar 19 - Thu, Mar 26
Delta Logo
6:10 am - 7:35 am
STL
-
BRU
19h 25m2 stops
Delta Logo
10:00 am - 9:06 pm
BRU
-
STL
17h 06m1 stop
$519Delta
Thu, Feb 19 - Thu, Feb 26
Air Canada Logo
7:41 am - 7:50 am
STL
-
BRU
17h 09m3 stops
Air Canada Logo
10:00 am - 3:29 pm
BRU
-
STL
36h 29m2 stops
$522Air Canada
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 $512 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $2,205 and $1,234 respectively.

Good to know

Low seasonApril
Cheapest flight$483
Best time to beat the crowds with an average 20% drop in price.
Most popular time to fly and prices are also 17% 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 3 days, the lowest price for a flight from St. Louis to Brussels Bruxelles-National Airport was $483 for a round-trip ticket.

  • 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 $784 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 $2,205 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.

Reviews of the top airlines flying from St. Louis to Brussels

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Brussels. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Brussels? 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 9138 reviews
6.6Food
7.3Comfort
7.7Boarding
8.1Crew
7.1Entertainment
Airline reviews

Perfect flight. Smooth flight. Arrived 20 minutes early at destination. Excellent service.

10.0 ExcellentDr. Joseph, Jan 2026
EWR - ORD
Read more United Airlines reviews

Perfect flight. Smooth flight. Arrived 20 minutes early at destination. Excellent service.

The flights were on time which was great give. It was holiday travel season and there’d been some weather issues. The only complaint and this is every time with United is the terrible seat design. The head rest is not built for comfort and having my neck bent forward for a cross country trip reminded me while I try not to take United flights as a rule.

I’m so sorry, I can’t remember her name, I believe it was Dimpti. She was stellar, also a mature Asian flight attendant, lots of flowers in her hair, just as amazing! But literally the crew was AWESOME . Only downside is there weren’t any charging outlets. Maybe I needed to ask a flight attendant , but it would’ve been nice to have one easily accessible.

The flight was delayed by two de-icings. The seatbelt did not work correctly. It did not stay tight.

Everything was absolutely wonderful from check in to baggage claim. Staff was very professional and sweet. Will definitely recommend United to family and friends.

Aircraft was noisy, old and never dimmed the lights on a night flight even on business class! I flew 17 times on United and probably another 40 on other airlines United USA /Europe flights were the worst to include luggage delayed once going to europe and once coming back

Check how old the airframe is, some older ones have inoperable seat back entertainment or power.

Sitting on the runway after we land for almost two hours! Not sure if we should blame United or Just Dumpy Vance.

Hotter than Hades in August. Why, why do crews think that in the winter when we are already dressed for cold weather we need a cabin that is 82 degrees. Even the vents were blowing hot air.

Unbelievably poor service from flight attendants. They didn’t even do water service on a four hour flight. Just disrespectful.

Crew was professional and great, flight was clean. However food was pathetic. I ordered a Hindu meal assuming no meat but they served chicken. Need to be very specific- Hindu meal should be categorize as Vegetarian - no meat or egg. Or it should be specific that we are serving meat.

Late flight Delays Poor service Poor staff Worst airline ever

Ground staff and cabin crew were excellent. Flight was perfectly on time. Zero issues.

Even after a delay, getting off the ground, thanks for keeping me safe, the airline made certain that my connecting flight was rebooked to get me to my final destination. It was actually rebooked twice, and my luggage still managed to meet me. The airline gave me a credit for food and beverage to be used at the airport vendors, regretfully, the credit did not transfer to my final boarding pass. Oh, well…

Trip was smooth, good drew, average meal, almost cold coffee. Excellent landing. Did not enjoy going down the stairs, walking to the gate, walking up the stairs, going a long walk to the exchange gate, and going down the stairs again to be bussed all the way where we originally landed to take our next flight! Over all an average experience. Thank you.

I booked extra leg room, due to seat neighbor i now consider extra shoulder and arm room as well. Seems like the seats shrink in width now The crew was very friendly and professional ( 100%). Food was good not great, breakfast was bad, a dry slice of bread would have been better. Facilities clean.

Luggage transfer in Chicago was not performed in time. I received my luggage at my destination two days later.

love the crews and my only problem was the delay at Frankfurt was very bad. I have travelled with Lufthansa for over 30 years now and this was cost me some planned business appointment

The flight delay made the connection a bit tight but that's outside the flight crew's control.

We just made it to our connecting flight. A long, long speed walk!

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

Information on your arrival and departure airports