HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Belgium

$686+ 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 5/14. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BRU
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
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

Keep the following information in mind while searching for St. Louis to Belgium flight deals. Data was last updated April 17, 2025.

Round-trip from

$686
(United Airlines)

Popular in

June

Cheapest in

February

Average price

$1,094
From Lambert-St Louis to Belgium
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($240 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 17, 2025.

This United Airlines deal was found by Cheapflights users on 4/15. 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 5/141:30 pmSTL - BRU
1 stop11h 35mUnited Airlines
Wed 5/2110:00 amBRU - STL
2 stops35h 53mUnited Airlines
Deal found 4/15$686
This Air Canada deal was found by Cheapflights users on 4/16. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/234:15 pmSTL - BRU
2 stops33h 40mAir Canada
Tue 12/3010:00 amBRU - STL
2 stops36h 26mAir Canada
Deal found 4/16$730
This oojo deal was found by Cheapflights users on 4/16. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2412:52 pmSTL - BRU
2 stops17h 58mBritish Airways
Wed 12/3111:50 amBRU - STL
2 stops17h 31mBritish Airways
Deal found 4/16$758
This FlightHub deal was found by Cheapflights users on 4/16. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/121:30 pmSTL - BRU
1 stop11h 35mMultiple Airlines
Mon 5/261:45 pmBRU - STL
2 stops32h 45mMultiple Airlines
Deal found 4/16$772
This American Airlines deal was found by Cheapflights users on 4/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/275:57 pmSTL - BRU
2 stops15h 43mAmerican Airlines
Tue 1/65:30 pmBRU - STL
2 stops22h 24mAmerican Airlines
Deal found 4/17$808
This Ovago deal was found by Cheapflights users on 4/16. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2112:51 pmSTL - BRU
2 stops22h 39mScandinavian Airlines
Sun 5/410:20 amBRU - STL
2 stops17h 19mScandinavian Airlines
Deal found 4/16$1,369

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 April 17, 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 5/14

1:30 pm-8:05 am

1 stop11h 35m

Brussels Bruxelles-National

Wed 5/21

10:00 am-2:53 pm

2 stops35h 53m

$686

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 5/12

1:30 pm-8:05 am

1 stop11h 35m

Brussels Bruxelles-National

Mon 5/26

1:45 pm-3:30 pm

2 stops32h 45m

$772

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 7/23

9:15 am-7:50 am

1 stop15h 35m

Brussels Bruxelles-National

Mon 7/28

10:00 am-8:00 pm

1 stop17h 00m

$951

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 5/26

7:30 pm-7:35 pm

2 stops17h 05m

Brussels Bruxelles-National

Mon 6/9

9:15 pm-7:35 pm

2 stops29h 20m

$993

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 7/11

1:20 pm-9:00 am

1 stop12h 40m

$1,415

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

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 $1,146). 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 April 17, 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.

Rainfall in Belgium by month

Plan your trip to Belgium by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Belgium ranges from 1.6 - 3.1 inches per month. January is typically the wettest month, when rainfall can reach 3.1 in. August is typically the driest time to visit Belgium when rainfall is around 1.6 in.

Temperature in Belgium by month

Plan your trip to Belgium by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Belgium, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 37.4 F).

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 April 17, 2025.
United Airlines
7.4
Good
8,667 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.0

Food

6.6

Overall

7.4

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
8,667 reviews
United Airlines
7.4
Good
8,667 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.0

Food

6.6

Overall

7.4

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??
Air Canada
7.0
Good
9,143 reviews
United Airlines
7.4
Good
8,667 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.0

Food

6.6

Overall

7.4

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??
Lufthansa
6.7
Okay
7,011 reviews
United Airlines
7.4
Good
8,667 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.0

Food

6.6

Overall

7.4

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??
British Airways
6.6
Okay
6,771 reviews
United Airlines
7.4
Good
8,667 reviews

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.0

Food

6.6

Overall

7.4

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 $1,146). 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
St. Louis to Frankfurt flights
Kansas City to Heathrow flights
Kansas City to Dublin flights
Kansas City to Leonardo da Vinci/Fiumicino flights
St. Louis to Gatwick flights
St. Louis to Leonardo da Vinci/Fiumicino flights
St. Louis to London City flights
Kansas City to Gatwick flights
Kansas City to Charles de Gaulle flights
St. Louis to Dublin flights
St. Louis to Charles de Gaulle flights
Kansas City to Vicenza flights
Kansas City to Athens flights
Kansas City to Frankfurt flights
St. Louis to Orly flights
St. Louis to Lisbon flights
Kansas City to London City flights
Kansas City to Amsterdam flights
St. Louis to Zurich flights
St. Louis to Barcelona-El Prat flights
St. Louis to Athens flights
St. Louis to Istanbul flights
St. Louis to Sarajevo flights
St. Louis to Copenhagen flights
Kansas City to Lisbon flights
Kansas City to Keflavik Intl flights
St. Louis to Keflavik Intl flights
St. Louis to Oslo Gardermoen flights
St. Louis to Amsterdam flights
St. Louis to Munich flights
Kansas City to Barcelona-El Prat flights
Kansas City to Malpensa flights
Kansas City to Madrid flights
St. Louis to Edinburgh flights
Kansas City to Istanbul flights
Kansas City to Linate flights
St. Louis to Madrid flights
Springfield to Heathrow flights
St. Louis to Malpensa flights
Kansas City to Naples flights
St. Louis to Naples flights
St. Louis to Florence flights
Kansas City to Orly flights
St. Louis to Sabiha Gokcen flights
Kansas City to Edinburgh flights
Kansas City to Zurich flights
Kansas City to Florence flights
Springfield to Frankfurt flights
St. Louis to Linate flights

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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$578Average$1,067FlexibilityNo 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.