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$526+ Cheap flights from St. Louis (STL) to Brussels

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/13. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BRU
Oct 31 — Nov 71
Fri 10/31
Fri 11/7
1 adult, Economy
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Cheap flight deals from St. Louis to Brussels

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Brussels (BR1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 1, 2025.

Round-trip from

$526
(FlightHub)

Popular in

June

Cheapest in

February

Average price

$802
From Lambert-St Louis to Brussels
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($221 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Find flight deals from St. Louis to Brussels

Cheapest flights from St. Louis to Brussels
Explore the most affordable flight options available from St. Louis to Brussels. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 1, 2025.

This FlightHub deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1311:39 amSTL - BRU
2 stops19h 51mScandinavian Airlines
Wed 11/193:10 pmBRU - STL
2 stops37h 08mScandinavian Airlines
Deal found 10/1$526
This United Airlines deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/121:10 pmSTL - BRU
2 stops17h 05mUnited Airlines
Thu 11/2710:00 amBRU - STL
2 stops35h 24mUnited Airlines
Deal found 10/1$530
This Air Canada deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/124:05 pmSTL - BRU
2 stops33h 50mAir Canada
Thu 11/2710:00 amBRU - STL
2 stops38h 39mAir Canada
Deal found 10/1$532
This United Airlines deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1311:49 amSTL - BRU
1 stop13h 16mUnited Airlines
Wed 11/197:00 amBRU - STL
1 stop13h 55mUnited Airlines
Deal found 10/1$552
This Kiwi.com deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/123:50 pmSTL - BRU
1 stop11h 20mLufthansa
Wed 11/197:00 amBRU - STL
1 stop13h 55mLufthansa
Deal found 9/29$624
This Gotogate deal was found by Cheapflights users on 9/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/124:05 pmSTL - BRU
2 stops14h 10mMultiple Airlines
Wed 11/197:00 amBRU - STL
1 stop13h 55mMultiple Airlines
Deal found 9/29$640
This United Airlines deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/153:19 pmSTL - BRU
2 stops14h 56mUnited Airlines
Thu 12/2511:55 amBRU - STL
1 stop14h 27mUnited Airlines
Deal found 10/1$648

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Brussels that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 1, 2025.
Use the filters below to find and compare flights from St. Louis to Brussels that are best for you.

Fly from

St. Louis

Fly to

Brussels

Route

Depart

Return

Price

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Thu 11/13

11:05 am-8:55 am

1 stop14h 50m

Brussels Bruxelles-National

Wed 11/19

10:00 am-2:24 pm

2 stops35h 24m

$534

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 11/12

10:00 am-8:55 am

1 stop15h 55m

Brussels Bruxelles-National

Thu 11/27

10:00 am-3:46 pm

2 stops36h 46m

$534

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 11/12

3:50 pm-10:10 am

1 stop11h 20m

Brussels Bruxelles-National

Wed 11/19

7:00 am-1:55 pm

1 stop13h 55m

$624

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 11/12

1:10 pm-1:15 pm

2 stops17h 05m

Brussels Bruxelles-National

Wed 11/19

10:00 am-3:46 pm

2 stops36h 46m

$630

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 11/12

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

Thu 11/27

10:00 am-2:24 pm

2 stops35h 24m

$632

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 11/12

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

Wed 11/19

7:00 am-1:55 pm

1 stop13h 55m

$640

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 12/15

3:19 pm-1:15 pm

2 stops14h 56m

Brussels Bruxelles-National

Thu 12/25

11:55 am-7:22 pm

1 stop14h 27m

$648

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/1

Best time to book a flight from St. Louis to Brussels

Have a flexible travel schedule? Discover the best time to fly to Brussels from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from St. Louis to Brussels?

Currently, November is the cheapest month in which you can book a flight from St. Louis to Brussels (average of $614). Flying from St. Louis to Brussels in June is currently the most expensive (average of $1,076). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to BRU?

Find hourly flight availability from St. Louis to Brussels. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 1, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 32% on flights from St. Louis to Brussels by exploring options for tickets in the afternoon.

How much does it cost to fly round-trip from St. Louis to Brussels?

Reviews of airlines servicing Brussels

Get insights into the airlines that provide service to Brussels. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Brussels. Reviews last updated October 1, 2025.
Read through reviews of airlines operating flights from St. Louis to Brussels, such as United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,929 reviews

Comfort

7.3

Entertainment

7.1

Overall

7.4

Boarding

7.7

Food

6.6

Crew

8.1

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.
United Airlines
7.4
Good
8,929 reviews
United Airlines
7.4
Good
8,929 reviews

Comfort

7.3

Entertainment

7.1

Overall

7.4

Boarding

7.7

Food

6.6

Crew

8.1

Reviews

1 / 20
4.0
Okay

Tim,Sep 2025

IAD - GSP

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Brussels. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Louis to Brussels?

    Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Brussels. On average, Lambert-St Louis has 0 outbound flights to Brussels per day from 1 airline. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

  • How long is the flight from St. Louis to Brussels?

    United Airlines and Lufthansa can get you from St. Louis to Brussels in just under 11h 20m. Your travel time can differ by up to 3h 30m. The distance between St. Louis and Brussels is about 4393 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What is the cheapest airline to fly from St. Louis to Brussels round-trip?

    Currently priced at $656, United Airlines will fly you from St. Louis to Brussels and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. This flight start at 28% lower than the current average price 3 months from now.

  • Can I find deals for flights from St. Louis to Brussels that include hotel bookings?

    Yes. In addition to deals on St. Louis to Brussels flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Brussels?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Brussels.

  • Can I find deals for business class flights from St. Louis to Brussels?

    Yes. Cheapflights offers flight deals from St. Louis to Brussels by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, November is the cheapest month in which you can book a flight from St. Louis to Brussels (average of $614). Flying from St. Louis to Brussels in June is currently the most expensive (average of $1,076). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for St. Louis to Brussels

See prices for flight routes from nearby airports that may be better suited for you.
St. Louis to Bruxelles-National flights
Kansas City to Bruxelles-National flights
Springfield to Bruxelles-National flights
St. Louis to Charleroi Brussels flights

Top airline flying from St. Louis to Brussels

Discover the top airline that operate flights from St. Louis to Brussels. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$656Average$842FlexibilityNo cancel feeOn-time69%

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