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Cheap flights from St. Louis to Belgium from $336

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Belgium departing on 5/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from St. Louis to Belgium

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
8:30 am - 7:15 am
STL
-
BRU
16h 45m1 stop
United Airlines Logo
10:00 am - 2:42 pm
BRU
-
STL
34h 42m2 stops
$438United Airlines
Wed, Mar 18 - Wed, Mar 25
Air Canada Logo
5:00 am - 7:50 am
STL
-
BRU
20h 50m2 stops
Air Canada Logo
10:00 am - 2:42 pm
BRU
-
STL
34h 42m2 stops
$442Air Canada
Wed, Mar 18 - Wed, Mar 25
Air Canada Logo
4:05 pm - 7:50 am
STL
-
BRU
32h 45m2 stops
Air Canada Logo
10:00 am - 2:42 pm
BRU
-
STL
34h 42m2 stops
$445Air Canada
Sun, Mar 1 - Tue, Mar 10
British Airways Logo
11:59 am - 7:45 pm
STL
-
BRU
25h 46m2 stops
British Airways Logo
9:15 pm - 7:30 pm
BRU
-
STL
29h 15m1 stop
$455British Airways
Tue, Mar 24 - Thu, Apr 30
Air Canada Logo
9:55 am - 7:50 am
STL
-
BRU
38h 55m2 stops
Air Canada Logo
10:00 am - 9:05 pm
BRU
-
STL
18h 05m2 stops
$456Air Canada
Tue, Feb 24 - Tue, Mar 3
United Airlines Logo
12:15 pm - 7:15 am
STL
-
BRU
12h 00m1 stop
United Airlines Logo
11:15 am - 5:00 pm
BRU
-
STL
12h 45m1 stop
$458United Airlines
Tue, Feb 24 - Tue, Mar 3
United Airlines Logo
11:25 am - 8:55 am
STL
-
BRU
14h 30m1 stop
United Airlines Logo
10:15 am - 5:00 pm
BRU
-
STL
12h 45m1 stop
$459United Airlines
Wed, Mar 4 - Wed, Mar 11
Air Canada Logo
4:05 pm - 7:50 am
STL
-
BRU
32h 45m1 stop
Air Canada Logo
9:25 am - 9:57 pm
BRU
-
STL
19h 32m2 stops
$460Air Canada
Sat, Apr 11 - Wed, Apr 22
United Airlines Logo
9:55 am - 8:55 am
STL
-
BRU
16h 00m1 stop
United Airlines Logo
10:00 am - 9:05 pm
BRU
-
STL
18h 05m2 stops
$462United Airlines
Tue, Feb 24 - Tue, Mar 3
United Airlines Logo
9:55 am - 7:15 am
STL
-
BRU
14h 20m2 stops
United Airlines Logo
11:55 am - 9:05 pm
BRU
-
STL
16h 10m2 stops
$463United Airlines
Tue, Feb 24 - Tue, Mar 3

British Airways flights from St. Louis to Belgium

Our best British Airways deals on St. Louis to Belgium flight tickets
British Airways
Mar 24
STL11:59 amLambert-St Louis
25h 46m
2 stops
BRU7:45 pmBrussels Bruxelles-National
Apr 30
BRU9:15 pmBrussels Bruxelles-National
29h 15m
1 stop
STL7:30 pmLambert-St Louis
$455
British Airways
Apr 1
STL12:03 pmLambert-St Louis
20h 02m
2 stops
BRU3:05 pmBrussels Bruxelles-National
Apr 8
BRU9:15 pmBrussels Bruxelles-National
31h 59m
2 stops
STL10:14 pmLambert-St Louis
$697

Lufthansa flights from St. Louis to Belgium

Our best Lufthansa deals on St. Louis to Belgium flight tickets
Lufthansa
Feb 24
STL12:15 pmLambert-St Louis
12h 00m
1 stop
BRU7:15 amBrussels Bruxelles-National
Mar 3
BRU11:15 amBrussels Bruxelles-National
19h 50m
1 stop
STL12:05 amLambert-St Louis
$476
Lufthansa
Mar 18
STL4:50 pmLambert-St Louis
11h 20m
1 stop
BRU10:10 amBrussels Bruxelles-National
Mar 25
BRU7:00 amBrussels Bruxelles-National
13h 55m
1 stop
STL2:55 pmLambert-St Louis
$592
Lufthansa
Mar 31
STL6:35 pmLambert-St Louis
14h 40m
2 stops
BRU4:15 pmBrussels Bruxelles-National
Apr 10
BRU8:30 amBrussels Bruxelles-National
11h 55m
1 stop
STL1:25 pmLambert-St Louis
$661

momondo 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, momondo users made 832,500 searches. Data last updated January 12, 2026.
Use the filters below to find and compare flights from St. Louis to Belgium that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 3/18

8:30 am-7:15 am

1 stop16h 45m

Brussels Bruxelles-National

Wed 3/25

10:00 am-2:42 pm

2 stops34h 42m

$438

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 3/18

5:00 am-7:50 am

2 stops20h 50m

Brussels Bruxelles-National

Wed 3/25

10:00 am-2:42 pm

2 stops34h 42m

$442

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 3/1

4:05 pm-7:50 am

2 stops32h 45m

Brussels Bruxelles-National

Tue 3/10

10:00 am-2:42 pm

2 stops34h 42m

$445

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 3/24

11:59 am-7:45 pm

2 stops25h 46m

Brussels Bruxelles-National

Thu 4/30

9:15 pm-7:30 pm

1 stop29h 15m

$455

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 2/24

9:55 am-7:50 am

2 stops38h 55m

Brussels Bruxelles-National

Tue 3/3

10:00 am-9:05 pm

2 stops18h 05m

$456

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 2/24

12:15 pm-7:15 am

1 stop12h 00m

Brussels Bruxelles-National

Tue 3/3

11:15 am-5:00 pm

1 stop12h 45m

$458

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 3/4

11:25 am-8:55 am

1 stop14h 30m

Brussels Bruxelles-National

Wed 3/11

10:15 am-5:00 pm

1 stop12h 45m

$459

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sat 4/11

4:05 pm-7:50 am

1 stop32h 45m

Brussels Bruxelles-National

Wed 4/22

9:25 am-9:57 pm

2 stops19h 32m

$460

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 2/24

9:55 am-8:55 am

1 stop16h 00m

Brussels Bruxelles-National

Tue 3/3

10:00 am-9:05 pm

2 stops18h 05m

$462

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 2/24

9:55 am-7:15 am

2 stops14h 20m

Brussels Bruxelles-National

Tue 3/3

11:55 am-9:05 pm

2 stops16h 10m

$463

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 resultsSorted by cheapest first
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See travel insights to Belgium from

How to get the cheapest flight ticket from St. Louis to Belgium

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Belgium?

In general, February is the cheapest month to fly from St. Louis to Belgium. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $512. If you are unable to visit Belgium during the month of February, then departing from St. Louis during the month January is also very affordable. Most momondo users find prices during this month for around $659.

Can stopping save me money on St. Louis to Belgium flights?

You could potentially save up to 24% on your flight if you consider stops on a St. Louis to Belgium flight.

Cheap St. Louis to Belgium flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Belgium

Fastest flight time

11h 40m

Direct flights

None
The fastest flight from St. Louis to Belgium takes 11h 40m
There are no direct flights from St. Louis to Belgium. There are no popular flight routes from St. Louis to Belgium.
Search flight deals

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Belgium?

    Prices for flights from Lambert-St Louis Airport to Belgium are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Belgium?

  • How old do you have to be to fly from Lambert-St Louis Airport to Belgium?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to Belgium.

  • What documentation or ID do you need to fly to Belgium?

    The travel and health documents required for your trip to Belgium can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Belgium. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from St. Louis to Belgium

Compare and see reviews for airlines that fly from St. Louis to Belgium with momondo
Airline
Rating
Free Cancellation
Price
LufthansaPriceFrom $441Free CancellationRating
6.8
7,709 reviews
Search Lufthansa flights
United AirlinesPriceFrom $628Free CancellationRating
7.4
9,144 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Belgium?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to Belgium. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from St. Louis to Belgium with flexible booking policies on momondo?

Flights from St. Louis to Belgium with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from St. Louis to Belgium?

Once all potential St. Louis to Belgium flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from St. Louis to Belgium right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of St. Louis to Belgium flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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