HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Belgium

$438+ 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 3/24. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BRU
Feb 23 — Mar 21
Mon 2/23
Mon 3/2
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Belgium with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 January 24, 2026.

This Flighttix deal was found by Cheapflights users on 1/22. 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.
Tue 3/2410:00 am
STL
-
BRU
2 stops15h 50m
Multiple Airlines
Thu 4/210:15 am
BRU
-
STL
1 stop17h 53m
Multiple Airlines
Deal found 1/22$438
This Flighttix deal was found by Cheapflights users on 1/22. 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.
Tue 3/247:40 am
STL
-
BRU
2 stops18h 10m
Air Canada
Thu 4/29:25 am
BRU
-
STL
2 stops20h 31m
Air Canada
Deal found 1/22$451
This United Airlines deal was found by Cheapflights users on 1/22. 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 3/188:30 am
STL
-
BRU
1 stop16h 45m
United Airlines
Wed 3/2510:00 am
BRU
-
STL
2 stops18h 59m
United Airlines
Deal found 1/22$462
This Air Canada deal was found by Cheapflights users on 1/22. 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 3/1810:00 am
STL
-
BRU
2 stops15h 50m
Air Canada
Wed 3/2510:00 am
BRU
-
STL
2 stops35h 29m
Air Canada
Deal found 1/22$463
This FlightHub deal was found by Cheapflights users on 1/22. 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 1/296:30 am
STL
-
BRU
2 stops18h 20m
Air Canada
Tue 2/310:00 am
BRU
-
STL
2 stops35h 30m
Air Canada
Deal found 1/22$492
This United Airlines deal was found by Cheapflights users on 1/24. 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 2/233:15 pm
STL
-
BRU
2 stops15h 00m
United Airlines
Mon 3/210:10 am
BRU
-
STL
1 stop19h 49m
United Airlines
Deal found 1/24$505
This Mytrip deal was found by Cheapflights users on 1/23. 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 3/96:25 am
STL
-
BRU
2 stops19h 25m
Air Canada
Mon 3/1610:00 am
BRU
-
STL
2 stops41h 07m
Air Canada
Deal found 1/23$506
This United Airlines deal was found by Cheapflights users on 1/22. 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 2/129:55 am
STL
-
BRU
1 stop16h 00m
United Airlines
Thu 2/1911:55 am
BRU
-
STL
1 stop15h 28m
United Airlines
Deal found 1/22$509
This KLM deal was found by Cheapflights users on 1/23. 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.
Mon 3/912:04 pm
STL
-
BRU
1 stop13h 56m
KLM
Mon 3/168:05 am
BRU
-
STL
2 stops14h 27m
KLM
Deal found 1/23$519

Find 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 January 24, 2026.

Round-trip from

$438
(Flighttix)

Popular in

December

Cheapest in

February

Average price

$659
From Lambert-St Louis to Belgium
Search Deals
Highest demand for flights based on searches. 24% potential increase in price ($304 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 14% potential price decrease ($116 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 January 24, 2026.
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

Tue 3/24

7:40 am-7:50 am

2 stops18h 10m

Brussels Bruxelles-National

Thu 4/2

9:25 am-10:56 pm

2 stops20h 31m

$451

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 3/18

4:05 pm-1:15 pm

2 stops15h 10m

Brussels Bruxelles-National

Wed 3/25

10:00 am-5:59 pm

2 stops37h 59m

$489

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 3/8

5:00 am-7:55 am

1 stop20h 55m

Brussels Bruxelles-National

Sun 3/15

9:00 am-3:29 pm

2 stops36h 29m

$489

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 2/23

3:15 pm-1:15 pm

2 stops15h 00m

Brussels Bruxelles-National

Mon 3/2

10:10 am-10:59 pm

1 stop19h 49m

$505

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 3/9

6:25 am-7:50 am

2 stops19h 25m

Brussels Bruxelles-National

Mon 3/16

10:00 am-9:07 pm

2 stops41h 07m

$506

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Thu 2/12

6:00 am-10:50 am

2 stops21h 50m

Brussels Bruxelles-National

Thu 2/19

10:15 am-11:48 pm

2 stops20h 33m

$509

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 3/9

12:04 pm-8:00 am

1 stop13h 56m

Brussels Bruxelles-National

Mon 3/16

10:00 am-5:53 pm

1 stop13h 53m

$509

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 2/23

11:59 am-11:10 am

2 stops16h 11m

Brussels Bruxelles-National

Mon 3/2

11:50 am-11:22 pm

2 stops18h 32m

$509

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Thu 2/12

9:55 am-8:55 am

1 stop16h 00m

Brussels Bruxelles-National

Thu 2/19

11:55 am-8:23 pm

1 stop15h 28m

$509

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 5/18

1:00 pm-8:00 pm

2 stops24h 00m

$544

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/22

Showing 1-10 of 12 results
1
2

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, April is the cheapest month in which you can book a flight from St. Louis to Belgium (average of $443). Flying from St. Louis to Belgium in June is currently the most expensive (average of $1,008). 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.

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 January 24, 2026.
Read reviews from past customers who have flown United Airlines and Lufthansa 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
9,193 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,193 reviews
United Airlines
7.4
Good
9,193 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Lufthansa
6.8
Okay
7,744 reviews
United Airlines
7.4
Good
9,193 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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.

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

    There are many flights that can get you from St. Louis to Belgium in 15h 10m. Fly via Air Canada or United Airlines to get the fastest option. St. Louis and Belgium are separated by a distance of 4393 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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, April is the cheapest month in which you can book a flight from St. Louis to Belgium (average of $443). Flying from St. Louis to Belgium in June is currently the most expensive (average of $1,008). 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 Belgium

See prices for flight routes from nearby airports that may be better suited for you.
St. Louis to Heathrow flights
Kansas City to Heathrow flights
Kansas City to Dublin flights
St. Louis to Leonardo da Vinci/Fiumicino flights
St. Louis to Gatwick flights
St. Louis to Charles de Gaulle flights
Kansas City to Leonardo da Vinci/Fiumicino flights
St. Louis to Orly flights
St. Louis to Frankfurt flights
Kansas City to Charles de Gaulle flights
St. Louis to Dublin flights
St. Louis to Athens flights
Kansas City to Gatwick flights
St. Louis to London City flights
Kansas City to Athens flights
St. Louis to Istanbul flights
St. Louis to Barcelona-El Prat flights
St. Louis to Stansted flights
St. Louis to Edinburgh flights
St. Louis to Zurich flights
St. Louis to Malpensa flights
Kansas City to Barcelona-El Prat flights
Kansas City to Amsterdam flights
Kansas City to Vicenza flights
Kansas City to Edinburgh flights
Kansas City to London City flights
Kansas City to Madrid flights
St. Louis to Lisbon flights
Kansas City to Lisbon flights
Kansas City to Frankfurt flights
St. Louis to Linate flights
St. Louis to Amsterdam flights
Kansas City to Orly flights
St. Louis to Keflavik Intl flights
St. Louis to Sabiha Gokcen flights
Springfield to Istanbul flights
Springfield to Heathrow flights
Kansas City to Stansted flights
St. Louis to Madrid flights
Kansas City to Frederic Chopin flights
St. Louis to Vicenza flights
Kansas City to Prague flights
Kansas City to Geneva flights
St. Louis to Frederic Chopin flights
Kansas City to Keflavik Intl flights
St. Louis to Naples flights
St. Louis to Cork flights
St. Louis to Manchester flights
St. Louis to Florence flights
Kansas City to Glasgow Intl flights

Top 2 airlines flying from St. Louis to Belgium

Discover the top 2 airlines 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 January 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$441Average$2,205FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$606Average$803FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.