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$462+ 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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BRU
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
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 August 14, 2025.

Round-trip from

$462
(KLM)

Popular in

June

Cheapest in

February

Average price

$773
From Lambert-St Louis to Brussels
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($238 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 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 August 14, 2025.

This KLM deal was found by Cheapflights users on 8/14. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1211:51 amSTL - BRU
2 stops14h 09mKLM
Thu 11/2711:00 amBRU - STL
2 stops16h 29mKLM
Deal found 8/14$462
This Delta deal was found by Cheapflights users on 8/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/146:30 amSTL - BRU
2 stops19h 30mDelta
Mon 11/2411:00 amBRU - STL
2 stops19h 02mDelta
Deal found 8/14$562
This Delta deal was found by Cheapflights users on 8/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/126:00 amSTL - BRU
2 stops20h 00mDelta
Thu 11/2711:00 amBRU - STL
2 stops16h 29mDelta
Deal found 8/13$571
This United Airlines deal was found by Cheapflights users on 8/14. 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 11/128:00 amSTL - BRU
1 stop17h 55mUnited Airlines
Thu 11/2710:00 amBRU - STL
2 stops35h 25mUnited Airlines
Deal found 8/14$583
This Air Canada deal was found by Cheapflights users on 8/14. 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.
Sun 11/94:05 pmSTL - BRU
2 stops32h 45mAir Canada
Wed 11/2610:00 amBRU - STL
2 stops31h 51mAir Canada
Deal found 8/14$585
This United Airlines deal was found by Cheapflights users on 8/14. 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.
Sat 11/155:24 pmSTL - BRU
1 stop32h 31mUnited Airlines
Thu 11/2710:00 amBRU - STL
2 stops35h 25mUnited Airlines
Deal found 8/14$589
This United Airlines deal was found by Cheapflights users on 8/14. 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.
Sun 11/93:14 pmSTL - BRU
1 stop10h 41mUnited Airlines
Wed 11/2610:10 amBRU - STL
1 stop16h 29mUnited Airlines
Deal found 8/14$606
This United Airlines deal was found by Cheapflights users on 8/14. 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.
Sat 11/156:43 pmSTL - BRU
1 stop31h 12mUnited Airlines
Wed 11/2610:10 amBRU - STL
1 stop14h 29mUnited Airlines
Deal found 8/14$611
This lastminute.com deal was found by Cheapflights users on 8/14. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/176:49 pmSTL - BRU
2 stops30h 51mVirgin Atlantic
Tue 8/2610:45 amBRU - STL
2 stops18h 17mVirgin Atlantic
Deal found 8/14$618
This Gotogate deal was found by Cheapflights users on 8/14. 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.
Sun 8/174:00 pmSTL - BRU
1 stop32h 50mAir Canada
Tue 8/2610:00 amBRU - STL
1 stop17h 00mAir Canada
Deal found 8/14$621
This United deal was found by Cheapflights users on 8/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/176:00 amSTL - BRU
1 stop18h 45mMultiple Airlines
Tue 8/2610:00 amBRU - STL
1 stop17h 00mMultiple Airlines
Deal found 8/14$645
This Mytrip deal was found by Cheapflights users on 8/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/181:30 pmSTL - CRL
2 stops15h 10mMultiple Airlines
Tue 8/262:40 pmCRL - STL
2 stops29h 50mMultiple Airlines
Deal found 8/12$1,572

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 August 14, 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

Wed 11/12

11:51 am-9:00 am

2 stops14h 09m

Brussels Bruxelles-National

Thu 11/27

11:00 am-8:29 pm

2 stops16h 29m

$462

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 11/14

6:30 am-9:00 am

2 stops19h 30m

Brussels Bruxelles-National

Mon 11/24

11:00 am-11:02 pm

2 stops19h 02m

$562

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 11/12

6:00 am-9:00 am

2 stops20h 00m

Brussels Bruxelles-National

Thu 11/27

11:00 am-8:29 pm

2 stops16h 29m

$571

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 11/12

6:30 am-7:50 am

2 stops18h 20m

Brussels Bruxelles-National

Tue 11/25

10:00 am-2:25 pm

2 stops35h 25m

$583

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 11/10

8:00 am-8:55 am

1 stop17h 55m

Brussels Bruxelles-National

Thu 11/27

10:00 am-2:25 pm

2 stops35h 25m

$583

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 11/12

6:30 am-7:50 am

2 stops18h 20m

Brussels Bruxelles-National

Thu 11/27

10:00 am-2:25 pm

2 stops35h 25m

$583

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 11/12

8:20 am-7:50 am

2 stops16h 30m

Brussels Bruxelles-National

Thu 11/27

10:00 am-2:25 pm

2 stops35h 25m

$583

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 11/12

6:30 am-7:50 am

2 stops18h 20m

Brussels Bruxelles-National

Wed 11/26

10:00 am-12:28 pm

2 stops33h 28m

$583

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 11/10

6:30 am-7:50 am

2 stops18h 20m

Brussels Bruxelles-National

Thu 11/27

10:00 am-2:25 pm

2 stops35h 25m

$583

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

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 $1,079). 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 August 14, 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.

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 August 14, 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
8,916 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,916 reviews
United Airlines
7.4
Good
8,916 reviews

Crew

8.1

Food

6.6

Boarding

7.7

Comfort

7.3

Overall

7.4

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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.

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

    Currently priced at $653, 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 $1,079). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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
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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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$653Average$878FlexibilityNo cancel feeOn-time69%

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