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Belgium

$357+ Cheap flights from St. Louis (STL) to Belgium

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/14. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BRU
feb. 14 — feb. 211
sáb. 2/14
sáb. 2/21
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 enero 15, 2026.

Round-trip from

$438
(United Airlines)

One-way from

$357
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$659
From Lambert-St Louis to Belgium
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One-way flight from Lambert-St Louis to Belgium
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Highest demand for flights based on searches. 24% potential increase in price ($304 potential increase over avg. RT price).
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Cheapest flight prices on average. 14% potential price decrease ($115 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 enero 15, 2026.

This United Airlines deal was found by Cheapflights users on 1/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 3/188:30 am
STL
-
BRU
1 stop16h 45m
United Airlines
mié. 3/2510:00 am
BRU
-
STL
2 stops34h 42m
United Airlines
Deal found 1/13$438
This FlightHub deal was found by Cheapflights users on 1/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 3/186:25 am
STL
-
BRU
2 stops19h 25m
Air Canada
mié. 3/2510:00 am
BRU
-
STL
2 stops34h 42m
Air Canada
Deal found 1/13$442
This oojo deal was found by Cheapflights users on 1/13. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 2/2311:59 am
STL
-
BRU
2 stops16h 11m
British Airways
lun. 3/25:30 pm
BRU
-
STL
2 stops36h 52m
British Airways
Deal found 1/13$447
This United Airlines deal was found by Cheapflights users on 1/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 2/274:05 pm
STL
-
BRU
2 stops14h 10m
United Airlines
vie. 3/610:00 am
BRU
-
STL
2 stops35h 43m
United Airlines
Deal found 1/13$463
This oojo deal was found by Cheapflights users on 1/13. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 2/129:37 am
STL
-
BRU
2 stops18h 13m
British Airways
jue. 2/193:00 pm
BRU
-
STL
2 stops38h 52m
British Airways
Deal found 1/13$472
This Ovago deal was found by Cheapflights users on 1/13. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 2/129:55 am
STL
-
BRU
2 stops20h 20m
Multiple Airlines
jue. 2/1911:55 am
BRU
-
STL
1 stop15h 28m
Multiple Airlines
Deal found 1/13$479
This United Airlines deal was found by Cheapflights users on 1/14. 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.
jue. 2/129:55 am
STL
-
BRU
2 stops20h 20m
United Airlines
jue. 2/1911:55 am
BRU
-
STL
1 stop15h 28m
United Airlines
Deal found 1/14$480
This Mytrip deal was found by Cheapflights users on 1/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 2/137:41 am
STL
-
BRU
2 stops17h 09m
Air Canada
vie. 2/2010:00 am
BRU
-
STL
2 stops31h 36m
Air Canada
Deal found 1/14$481
This KAYAK deal was found by Cheapflights users on 1/13. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 2/2312:15 pm
STL
-
BRU
1 stop12h 00m
Lufthansa
lun. 3/211:15 am
BRU
-
STL
1 stop19h 50m
Lufthansa
Deal found 1/13$482
This KAYAK deal was found by Cheapflights users on 1/14. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 1/263:11 pm
STL
-
BRU
1 stop10h 44m
Austrian Airlines
lun. 2/97:55 pm
BRU
-
STL
2 stops35h 04m
Austrian Airlines
Deal found 1/14$483

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 enero 15, 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

mié. 3/18

8:30 am-7:15 am

1 stop16h 45m

Brussels Bruxelles-National

mié. 3/25

10:00 am-2:42 pm

2 stops34h 42m

$438

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

lun. 2/23

2:00 pm-4:40 pm

2 stops19h 40m

Brussels Bruxelles-National

lun. 3/2

8:45 pm-11:48 pm

2 stops34h 03m

$459

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

vie. 2/27

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

vie. 3/6

10:00 am-2:43 pm

2 stops35h 43m

$463

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

jue. 2/12

9:37 am-10:50 am

2 stops18h 13m

Brussels Bruxelles-National

jue. 2/19

3:00 pm-10:52 pm

2 stops38h 52m

$472

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

jue. 2/12

9:55 am-1:15 pm

2 stops20h 20m

Brussels Bruxelles-National

jue. 2/19

11:55 am-8:23 pm

1 stop15h 28m

$479

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

jue. 2/12

9:55 am-1:15 pm

2 stops20h 20m

Brussels Bruxelles-National

jue. 2/19

11:55 am-8:23 pm

1 stop15h 28m

$480

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

vie. 2/13

7:41 am-7:50 am

2 stops17h 09m

Brussels Bruxelles-National

vie. 2/20

10:00 am-10:36 am

2 stops31h 36m

$481

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

vie. 2/27

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

vie. 3/6

7:00 am-1:55 pm

1 stop13h 55m

$482

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

lun. 2/23

12:15 pm-7:15 am

1 stop12h 00m

Brussels Bruxelles-National

lun. 3/2

7:55 pm-11:59 pm

2 stops35h 04m

$483

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

mar. 3/17

8:06 pm-7:50 am

3 stops29h 44m

$358

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/15

Showing 1-10 of 20 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 enero 15, 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
9,163 reviews

Comfort

7.3

Overall

7.4

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

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
9,163 reviews
United Airlines
7.4
Good
9,163 reviews

Comfort

7.3

Overall

7.4

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

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
7,715 reviews
United Airlines
7.4
Good
9,163 reviews

Comfort

7.3

Overall

7.4

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

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 16h 45m. Fly via United Airlines or British Airways 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

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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 enero 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$441Average$2,205FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$628Average$780FlexibilityNo cancel feeOn-time69%

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