STL - BRU

$322 Find Cheap Flights from St. Louis to Brussels Airport

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 3/30. 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

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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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

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Everything you should know

Cheapest round-trip
$724
Overall average: $751
United Airlines
Wed 4/15Wed 4/22
STL - BRU • 2 stops
Cheapest one-way
$322
Multiple Airlines
Mon 3/30
STL - BRU • 3 stops
Top airlines
Scandinavian Airlines
Cheapest • from $753 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between St. Louis and Brussels. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Frankfurt am Main (FRA)
Cheapest • Avg $776 (round-trip)
Chicago (ORD)
Shortest trip • 11h 30m (one-way)
Insights
Insights
Insights
Insights
When to travel
February
Cheapest • 47% price drop
March
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
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

Wed, Apr 15 - Wed, Apr 22
United Airlines Logo
11:37 am - 1:15 pm
STL
-
BRU
18h 38m
2 stops
United Airlines Logo
10:15 am - 9:13 pm
BRU
-
STL
17h 58m
1 stop
$724United Airlines
Wed, Apr 15 - Wed, Apr 22
United Airlines Logo
10:00 am - 9:00 am
STL
-
BRU
16h 00m
1 stop
United Airlines Logo
10:15 am - 7:31 pm
BRU
-
STL
16h 16m
1 stop
$727United Airlines
Wed, Apr 15 - Wed, Apr 22
United Airlines Logo
8:21 am - 7:15 am
STL
-
BRU
15h 54m
2 stops
United Airlines Logo
11:10 am - 9:13 pm
BRU
-
STL
17h 03m
2 stops
$732United Airlines
Tue, Apr 14 - Tue, Apr 21
Multiple Airlines Logo
4:05 pm - 1:15 pm
STL
-
BRU
14h 10m
2 stops
Multiple Airlines Logo
7:00 am - 3:25 pm
BRU
-
STL
15h 25m
2 stops
$752Multiple Airlines
Tue, Mar 31 - Fri, Apr 10
Scandinavian Airlines Logo
12:04 pm - 9:40 am
STL
-
BRU
38h 36m
2 stops
Scandinavian Airlines Logo
3:15 pm - 11:58 pm
BRU
-
STL
39h 43m
2 stops
$754Scandinavian Airlines
Tue, Apr 14 - Tue, Apr 21
United Airlines Logo
11:15 am - 1:15 pm
STL
-
BRU
19h 00m
2 stops
United Airlines Logo
11:10 am - 4:43 pm
BRU
-
STL
12h 33m
1 stop
$773United Airlines
Thu, Apr 16 - Thu, Apr 23
Air Canada Logo
7:45 am - 7:10 am
STL
-
BRU
16h 25m
2 stops
Air Canada Logo
9:40 am - 3:25 pm
BRU
-
STL
12h 45m
1 stop
$774Air Canada
Thu, Apr 16 - Thu, Apr 23
Air Canada Logo
7:45 am - 7:10 am
STL
-
BRU
16h 25m
2 stops
Air Canada Logo
9:55 am - 8:25 am
BRU
-
STL
29h 30m
2 stops
$775Air Canada
Thu, Apr 16 - Thu, Apr 23
United Airlines Logo
7:45 am - 9:00 am
STL
-
BRU
18h 15m
1 stop
United Airlines Logo
9:40 am - 3:25 pm
BRU
-
STL
12h 45m
1 stop
$776United Airlines
Tue, Apr 14 - Tue, Apr 21
United Airlines Logo
10:00 am - 9:00 am
STL
-
BRU
16h 00m
1 stop
United Airlines Logo
11:10 am - 4:43 pm
BRU
-
STL
12h 33m
1 stop
$777United Airlines
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 June, where the average cost of round-trip tickets is $2,205 and $1,234 respectively.

Good to know

Low seasonJanuary
Cheapest flight$322
Best time to beat the crowds with an average 30% drop in price.
Most popular time to fly and prices are also 26% 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 $322 for a one-way ticket and $752 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 $763 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 $2,200 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 9403 reviews
8.1Crew
7.7Boarding
7.3Comfort
6.6Food
7.1Entertainment
Airline reviews

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

6.0 GoodAnonymous, Mar 2026
SFO - DEN
Read more United Airlines reviews

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

It’s always a great time flying with united airlines.

Good flight. Efficient boarding and competent flight crew. No problems until we arrived at our destination gate. We were early so there was an aircraft at the gate that had to move before we could pull in. Then, due to the type of aircraft we flew, the cabin door could not be opened until some luggage from the cargo bay was offloaded to preserve center of gravity characteristics. So, that further delayed deplaning. Despite being 20 minutes early on landing, we ended up being 5 to 10 minutes late after all the delays.

Everything went well except the turbulence what no one have a control of but pilot and crew handled very good!

There was no WiFi available, there were mechanical problems with the plane and we landed at C 124, then the gate was switched to A 26, then all the way back to C126! For a 75 yo woman traveling alone, this was a difficult journey, indeed!

This trip did not start off well. The inbound flight was delayed about 20 minutes. Then, after initial onboarding, the passengers had to deplane due to a mechanical problem. That took about 30 minutes to fix and be cleared. Then, reboarding was chaotic. It took a long time to sort passengers and two passengers on standby were ticketed but there was no seat. So, they had to deplane. One of the flight crew was trying to help passengers figure out a place to put their carry-on bags and that took more time. In the end, our scheduled 10:30 am departure did not actually take off until about 12:05 pm CST. The flight itself was long but we got to Houston. Some passengers missed their connecting flights and had to rebook. Not the best of flights I've had.

Staff were good. My seat was in need of repair, but for a short flight was not problematic. Usual basic snack and drink setup that you'll find on any US carrier. Over, a decent, basic flight.

Complimentary light meal would be appreciated. But great flight crew service on all legs

Terrible because it was cancelled due to volcanic ash clouds in Guatemala while all other airlines kept flying. Had to pay for a hotel to stay overnight in Houston and try to fly next day.

The staff was bit rude when I asked for an extra drink after one beer, asked for one wine glass.

Very good, i got two seats for myself, and was comfortable with the blanket i got

I hated the FRA Airport. Confusing signage, including the path to Immigration and Security It seems that the airport grew haphazardly over the years. I have been through multiple WW Hubs with much better experiences.

Economy Priority seats are extremely uncomfortable. There is no way to escape the boxed in feeling, particularely because the distance between to rows are too short, the hard edge of the front row is keeping legs confined. There is no elevated place to put your feet. I am of average, European size.

Terrible. Both flights were significantly delayed, no luggage, made me check my small bag when many, many others had much larger carry-ons, not even a bottle of water . . . I will not fly Discover Airlines again.

I was deceived on the Kayak site expecting a ticket, but instead finding a "standby" reservation. When I tried to change the ticket, I paid almost twice the price of the original ticket. Then, the airline refused to give me the reserved seat I had chosen and paid for. I think I deserve a refund for this leg of my trip because I was doubly charged and did not receive what I had paid for. I put in a complaint with Lufthansa because the ticket was sold originally sold as a flight they listed. Someone here needs to take responsibility.

Excellent service; they helped me reschedule so I can fly in an earlier flight

I had a good comfortable seat. There was nearly an hour delay. There was an accident with the champagne, but I was well compensated. These things happen sometimes.

Service and food were excellent. Incredibly friendly and competent staff. Flight was delayed over and hour and I had to run between terminals to get my connecting flight.

Missed it by a couple minutes and couldn’t find an alternative flight so had to spend the night in DC and after much shuffling from 1 airline to another managed to get a United to Frankfurt.

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

Information on your arrival and departure airports