STL - BRU

$398 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 8/12. 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

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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Flights Deals

Cheap Flights from St. Louis to Bruxelles-National (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 Bruxelles-National 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, Nov 26 - Sat, Dec 6
United Airlines Logo
11:05 am - 8:55 amSTL-BRU
14h 50m1 stop
United Airlines Logo
10:00 am - 2:25 pmBRU-STL
35h 25m2 stops
$632United Airlines
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Wed, Nov 26 - Sat, Dec 6
United Airlines Logo
10:00 am - 8:55 amSTL-BRU
15h 55m1 stop
United Airlines Logo
10:10 am - 3:40 pmBRU-STL
12h 30m1 stop
$655United Airlines
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Wed, Aug 27 - Wed, Sep 3
United Airlines Logo
9:15 am - 7:50 amSTL-BRU
15h 35m1 stop
United Airlines Logo
10:00 am - 2:19 pmBRU-STL
35h 19m2 stops
$679United Airlines
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Thu, Nov 6 - Mon, Nov 10
Austrian Airlines Logo
11:49 am - 10:50 amSTL-BRU
16h 01m2 stops
Austrian Airlines Logo
7:55 pm - 11:44 pmBRU-STL
34h 49m2 stops
$681Austrian Airlines
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Mon, Dec 15 - Thu, Dec 25
Air Canada Logo
10:00 am - 7:50 amSTL-BRU
14h 50m2 stops
Air Canada Logo
10:00 am - 3:29 pmBRU-STL
36h 29m2 stops
$682Air Canada
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Mon, Dec 15 - Thu, Dec 25
United Airlines Logo
3:19 pm - 8:55 amSTL-BRU
10h 36m1 stop
United Airlines Logo
10:10 am - 3:21 pmBRU-STL
12h 11m1 stop
$685United Airlines
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Wed, Aug 27 - Wed, Sep 3
Logo
9:15 am - 7:50 amSTL-BRU
15h 35m1 stop
Logo
8:30 am - 1:30 pmBRU-STL
12h 00m1 stop
$690
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Thu, Nov 6 - Mon, Nov 10
United Airlines Logo
8:25 am - 7:15 amSTL-BRU
15h 50m1 stop
United Airlines Logo
10:10 am - 3:46 pmBRU-STL
12h 36m1 stop
$705United Airlines
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Wed, Sep 24 - Wed, Oct 8
Air Canada Logo
1:30 pm - 9:45 amSTL-BRU
13h 15m2 stops
Air Canada Logo
10:00 am - 7:57 pmBRU-STL
16h 57m1 stop
$733Air Canada
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Wed, Jul 30 - Thu, Aug 7
Logo
11:24 am - 11:55 pmSTL-BRU
29h 31m3 stops
Logo
11:50 am - 9:52 amBRU-STL
29h 02m3 stops
$1,280
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Useful Info

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.

How much is a round-trip flight from St. Louis to Brussels Bruxelles-National Airport?

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

The average price of all round-trip flights from St. Louis to Brussels Bruxelles-National Airport clicked on KAYAK for each day over the last 12 months.

When flying from St. Louis to Brussels Airport, you should consider leaving on a Friday and avoid Mondays if you are looking for the best rates. For your return to St. Louis, you’ll find the best rates on Fridays and the most expensive ones on Saturdays.

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 $690 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $1,296 and $1,134 respectively.

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Good to know

Low seasonApril
High seasonJanuary
Cheapest flight$398
Best time to beat the crowds but there is an average 3% increase in price.
Most popular time to fly with an average 16% increase in price.
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 $398 for a one-way ticket and $632 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.

  • 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 airline 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 8858 reviews
6.6Food
7.0Entertainment
7.3Comfort
8.1Crew
7.7Boarding
Airline reviews

It was delayed instead of departing at 9:20pm, we departed at 11pm… putting us in Columbus after 2am! It was awful. Had I known about the delay, I could have spent some time in the United Lounge… I was starving because I started my journey in Budapest… so I was exhausted and hungry. Plus I had to make new arrangements to be picked up at the airport in Columbus, instead of midnight it was 2:30 am after getting luggage and out of airport. Not feasible. I would have just stayed in Chicago for the night and gotten a morning flight.

10.0 ExcellentAnita, Jul 2025ORD - CMH
Read more United Airlines reviews

It was delayed instead of departing at 9:20pm, we departed at 11pm… putting us in Columbus after 2am! It was awful. Had I known about the delay, I could have spent some time in the United Lounge… I was starving because I started my journey in Budapest… so I was exhausted and hungry. Plus I had to make new arrangements to be picked up at the airport in Columbus, instead of midnight it was 2:30 am after getting luggage and out of airport. Not feasible. I would have just stayed in Chicago for the night and gotten a morning flight.

Not a great experience. We paid for the upgrade for premium economy seats and seated ourselves in very comfortable seats. Someone came along with the same seat on their boarding pass. The aircraft had been changed and as a result we were booted out and sent further back to small uncomfortable seats. After complaining we were moved to emergency row seats, which gave us more leg room but the seats don’t recline. For people in our 70’s we found having to sit upright from California to NJ very uncomfortable. Not sure why they chose to move senior citizens instead of the two people that were allowed to take the more comfortable seats. Not happy.

I liked the choice of lemon ginger tea. I think stewardesses can be more considerate of older people needs.

The food should improve! And The flight should leave on time and not make the traveler wait.

It was great, I’m very grateful for the pilots and crew flight attendants for everything.

Everything was great. Only thing that could’ve made it better was buy on board options for hot food, but the snacks were decent. The flight attendants were great. I had no complaints. I was able to make it to my destination safely

A little bit more leg room in premium economy. I am 6’4”.

Overall it was good. I missed my connection but I was put on another flight.

The attendant were friendly. I suggest you have a medical attendant on board every flight so that in case someone is sick , he/she will help them.

The woman gate agent in Phoenix was none too sympathetic about my check-in process as I am relatively new with using apps. I almost did not get on because she said I did not check-in. I thought I had via Kayak where I purchased a very expensive ticket. Lesson learned but to be told I may not get on as a matter of factly was difficult to hear.

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)

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