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$443+ 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 1/12. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BRU
ene. 11 — ene. 181
dom. 1/11
dom. 1/18
1 adult, Economy
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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 diciembre 12, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 12/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/1512:55 pmSTL - BRU
1 stop11h 20mLufthansa
jue. 12/2510:30 amBRU - STL
2 stops15h 52mLufthansa
Deal found 12/11$1,749
This Cathay Pacific deal was found by Cheapflights users on 12/10. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/155:15 amSTL - BRU
3 stops46h 35mMultiple Airlines
jue. 12/2511:30 amBRU - STL
2 stops42h 26mMultiple Airlines
Deal found 12/10$12,099

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 diciembre 12, 2025.

Round-trip from

$443
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$2,205
From Lambert-St Louis to Belgium
Search Deals
Highest demand for flights based on searches. 26% potential increase in price ($353 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 12% potential price decrease ($110 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 diciembre 12, 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

lun. 1/12

1:15 pm-8:55 am

1 stop12h 40m

Brussels Bruxelles-National

mié. 1/21

6:45 am-5:43 pm

2 stops17h 58m

$443

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

lun. 1/12

4:05 pm-1:15 pm

2 stops38h 10m

Brussels Bruxelles-National

mié. 1/21

7:00 am-3:29 pm

2 stops39h 29m

$484

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

mié. 2/4

10:10 am-1:15 pm

2 stops20h 05m

Brussels Bruxelles-National

dom. 2/8

10:00 am-7:27 pm

2 stops40h 27m

$484

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

jue. 1/29

4:05 pm-8:55 am

2 stops33h 50m

Brussels Bruxelles-National

mar. 2/3

10:00 am-2:30 pm

2 stops35h 30m

$486

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

jue. 1/29

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

mar. 2/3

10:00 am-2:30 pm

2 stops35h 30m

$486

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

jue. 1/29

11:22 am-8:05 am

1 stop13h 43m

Brussels Bruxelles-National

mar. 2/3

10:30 am-11:59 pm

2 stops20h 29m

$493

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

mié. 2/18

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

mié. 2/25

10:10 am-10:00 pm

1 stop18h 50m

$501

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

mié. 2/4

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

dom. 2/8

10:00 am-3:29 pm

2 stops36h 29m

$505

St. LouisBrussels

STL - CRL

STLCRL

Lambert-St Louis

mié. 2/18

4:05 pm-4:05 pm

2 stops17h 00m

Charleroi Brussels

mié. 2/25

7:30 pm-3:29 pm

2 stops26h 59m

$1,115

St. LouisBrussels

STL - CRL

STLCRL

Lambert-St Louis

lun. 4/6

4:05 pm-11:00 pm

3 stops23h 55m

Charleroi Brussels

sáb. 4/11

11:00 am-3:24 pm

3 stops35h 24m

$1,701

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

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 $453). 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.

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 diciembre 12, 2025.

When flying from St. Louis to Belgium, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 48% versus a flight in the evening.

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 diciembre 12, 2025.
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
9,095 reviews

Entertainment

7.1

Crew

8.1

Boarding

7.7

Overall

7.4

Food

6.6

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
United Airlines
7.4
Good
9,095 reviews
United Airlines
7.4
Good
9,095 reviews

Entertainment

7.1

Crew

8.1

Boarding

7.7

Overall

7.4

Food

6.6

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
Lufthansa
6.8
Okay
7,626 reviews
United Airlines
7.4
Good
9,095 reviews

Entertainment

7.1

Crew

8.1

Boarding

7.7

Overall

7.4

Food

6.6

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.

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 12h 40m. Fly via Lufthansa, 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 $453). 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

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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 diciembre 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$654Average$805FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$829Average$2,205FlexibilityNo cancel feeOn-time76%

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