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$583+ Cheap flights from St. Louis (STL) to Belgium

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 23 — Aug 301
Sat 8/23
Sat 8/30
1 adult, Economy
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Cheap flight deals from St. Louis to Belgium

Keep the following information in mind while searching for St. Louis to Belgium flight deals. Data was last updated August 18, 2025.

Round-trip from

$583
(United Airlines)

Popular in

June

Cheapest in

February

Average price

$773
From Lambert-St Louis to Belgium
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 Belgium

Cheapest flights from St. Louis to Belgium
Explore the most affordable flight options available from St. Louis to Belgium. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 18, 2025.

This United Airlines deal was found by Cheapflights users on 8/16. 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 11/128:25 amSTL - BRU
1 stop15h 50mUnited Airlines
Thu 11/2710:00 amBRU - STL
2 stops40h 39mUnited Airlines
Deal found 8/16$583
This lastminute.com deal was found by Cheapflights users on 8/17. 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.
Mon 8/1811:02 amSTL - BRU
2 stops14h 38mVirgin Atlantic
Tue 8/2610:45 amBRU - STL
2 stops18h 17mVirgin Atlantic
Deal found 8/17$626
This United deal was found by Cheapflights users on 8/17. 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 11/96:43 pmSTL - BRU
1 stop31h 12mMultiple Airlines
Sun 11/1610:00 amBRU - STL
2 stops36h 29mMultiple Airlines
Deal found 8/17$641
This United Airlines deal was found by Cheapflights users on 8/17. 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 8/186:00 amSTL - BRU
1 stop18h 00mUnited Airlines
Tue 8/2610:00 amBRU - STL
1 stop17h 00mUnited Airlines
Deal found 8/17$644
This Booking.com deal was found by Cheapflights users on 8/17. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/95:24 pmSTL - BRU
2 stops31h 26mAir Canada
Sun 11/1610:00 amBRU - STL
2 stops14h 39mAir Canada
Deal found 8/17$647
This Flighttix deal was found by Cheapflights users on 8/17. 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1811:02 amSTL - BRU
2 stops14h 38mMultiple Airlines
Tue 8/2610:45 amBRU - STL
2 stops18h 17mMultiple Airlines
Deal found 8/17$655
This United Airlines deal was found by Cheapflights users on 8/17. 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 11/912:31 pmSTL - BRU
1 stop13h 24mUnited Airlines
Sun 11/1610:10 amBRU - STL
1 stop12h 36mUnited Airlines
Deal found 8/17$656
This United Airlines deal was found by Cheapflights users on 8/16. 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 stops33h 31mUnited Airlines
Thu 12/2510:00 amBRU - STL
2 stops42h 43mUnited Airlines
Deal found 8/16$663
This United deal was found by Cheapflights users on 8/17. 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.
Mon 12/156:42 pmSTL - BRU
1 stop31h 13mMultiple Airlines
Thu 12/2510:00 amBRU - STL
2 stops36h 29mMultiple Airlines
Deal found 8/17$671
This Scandinavian Airlines deal was found by Cheapflights users on 8/16. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/241:26 pmSTL - BRU
2 stops37h 14mScandinavian Airlines
Wed 10/84:00 pmBRU - STL
2 stops38h 41mScandinavian Airlines
Deal found 8/16$687

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Belgium 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 18, 2025.
Use the filters below to find and compare flights from St. Louis to Belgium that are best for you.

Fly from

St. Louis

Fly to

Belgium

Route

Depart

Return

Price

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

8:25 am-7:15 am

1 stop15h 50m

Brussels Bruxelles-National

Thu 11/27

10:00 am-7:39 pm

2 stops40h 39m

$583

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 11/9

6:43 pm-8:55 am

1 stop31h 12m

Brussels Bruxelles-National

Sun 11/16

10:00 am-3:29 pm

2 stops36h 29m

$641

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 11/9

5:24 pm-7:50 am

2 stops31h 26m

Brussels Bruxelles-National

Sun 11/16

10:00 am-5:39 pm

2 stops14h 39m

$647

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 11/9

12:31 pm-8:55 am

1 stop13h 24m

Brussels Bruxelles-National

Sun 11/16

10:10 am-3:46 pm

1 stop12h 36m

$656

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 12/15

6:42 pm-7:50 am

2 stops30h 08m

Brussels Bruxelles-National

Thu 12/25

10:00 am-5:54 pm

2 stops38h 54m

$663

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 12/15

3:19 pm-7:50 am

2 stops33h 31m

Brussels Bruxelles-National

Thu 12/25

10:00 am-9:43 pm

2 stops42h 43m

$663

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 12/15

6:42 pm-8:55 am

1 stop31h 13m

Brussels Bruxelles-National

Thu 12/25

10:00 am-3:29 pm

2 stops36h 29m

$671

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

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

Have a flexible travel schedule? Discover the best time to fly to Belgium 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 Belgium

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

Currently, November is the cheapest month in which you can book a flight from St. Louis to Belgium (average of $614). Flying from St. Louis to Belgium 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 BE?

Find hourly flight availability from St. Louis to Belgium. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 18, 2025.

When flying from St. Louis to Belgium, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing Belgium

Get insights into the airlines that provide service to Belgium. 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 Belgium. Reviews last updated August 18, 2025.
Read reviews from past customers who have flown United Airlines from St. Louis to Belgium. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,925 reviews

Overall

7.4

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Food

6.6

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
8,925 reviews
United Airlines
7.4
Good
8,925 reviews

Overall

7.4

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Food

6.6

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 Belgium. 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 Belgium?

    Located just 12.7 mi from the city center, Lambert-St Louis (STL) is the airport most travelers will use when flying to Belgium from St. Louis.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Belgium 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 Belgium?

    Currently, November is the cheapest month in which you can book a flight from St. Louis to Belgium (average of $614). Flying from St. Louis to Belgium 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

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Top airline flying from St. Louis to Belgium

Discover the top airline that operate flights from St. Louis to Belgium. 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 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$653Average$878FlexibilityNo cancel feeOn-time69%

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