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Cheap flights from St. Louis to Belgium from $329

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 3/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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.
Scandinavian Airlines Logo
1:03 pm - 9:40 am
STL
-
BRU
37h 37m
2 stops
Scandinavian Airlines Logo
3:15 pm - 9:24 pm
BRU
-
STL
37h 09m
2 stops
$669Scandinavian Airlines
Sat, May 2 - Sat, May 9
Air Canada Logo
7:45 am - 7:10 am
STL
-
BRU
40h 25m
2 stops
Air Canada Logo
9:25 am - 9:08 pm
BRU
-
STL
42h 43m
2 stops
$691Air Canada
Sat, Apr 11 - Tue, Apr 21
Multiple Airlines Logo
4:05 pm - 1:15 pm
STL
-
BRU
14h 10m
2 stops
Multiple Airlines Logo
7:00 am - 3:24 pm
BRU
-
STL
15h 24m
2 stops
$693Multiple Airlines
Wed, Apr 8 - Wed, Apr 15
United Airlines Logo
12:15 pm - 1:15 pm
STL
-
BRU
18h 00m
2 stops
United Airlines Logo
10:15 am - 7:31 pm
BRU
-
STL
16h 16m
1 stop
$704United Airlines
Wed, Apr 8 - Wed, Apr 15
Air Canada Logo
7:45 am - 7:10 am
STL
-
BRU
16h 25m
2 stops
Air Canada Logo
9:25 am - 10:45 am
BRU
-
STL
32h 20m
2 stops
$705Air Canada
Wed, Apr 8 - Wed, Apr 15
KLM Logo
12:04 pm - 7:40 am
STL
-
BRU
12h 36m
1 stop
KLM Logo
9:45 am - 9:19 pm
BRU
-
STL
18h 34m
1 stop
$707KLM
Sun, Apr 12 - Tue, Apr 21
United Airlines Logo
4:05 pm - 1:15 pm
STL
-
BRU
14h 10m
2 stops
United Airlines Logo
11:10 am - 4:43 pm
BRU
-
STL
12h 33m
1 stop
$708United Airlines
Sun, Apr 12 - Wed, Apr 22
United Airlines Logo
11:15 am - 7:10 am
STL
-
BRU
36h 55m
2 stops
United Airlines Logo
10:15 am - 9:08 pm
BRU
-
STL
17h 53m
1 stop
$711United Airlines
Sat, Apr 11 - Wed, Apr 22
Air Canada Logo
7:45 am - 7:10 am
STL
-
BRU
40h 25m
2 stops
Air Canada Logo
9:25 am - 3:24 pm
BRU
-
STL
36h 59m
2 stops
$712Air Canada
Sat, Apr 11 - Wed, Apr 22
Multiple Airlines Logo
12:10 pm - 9:25 pm
STL
-
CRL
26h 15m
2 stops
Multiple Airlines Logo
9:15 pm - 8:02 pm
CRL
-
STL
29h 47m
3 stops
$992Multiple Airlines
Sun, Aug 16 - Mon, Aug 24

United Airlines flights from St. Louis to Belgium

Our best United Airlines deals on St. Louis to Belgium flight tickets
United Airlines
Apr 8
STL12:15 pmLambert-St Louis
18h 00m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Apr 15
BRU10:15 amBrussels Bruxelles-National
16h 16m
1 stop
STL7:31 pmLambert-St Louis
$704
United Airlines
Apr 8
STL1:10 pmLambert-St Louis
12h 50m
1 stop
BRU9:00 amBrussels Bruxelles-National
Apr 15
BRU10:15 amBrussels Bruxelles-National
14h 21m
1 stop
STL5:36 pmLambert-St Louis
$707
United Airlines
Apr 11
STL11:15 amLambert-St Louis
36h 55m
2 stops
BRU7:10 amBrussels Bruxelles-National
Apr 22
BRU10:15 amBrussels Bruxelles-National
17h 53m
1 stop
STL9:08 pmLambert-St Louis
$711

Air Canada flights from St. Louis to Belgium

Our best Air Canada deals on St. Louis to Belgium flight tickets
Air Canada
Apr 8
STL7:45 amLambert-St Louis
16h 25m
2 stops
BRU7:10 amBrussels Bruxelles-National
Apr 15
BRU9:25 amBrussels Bruxelles-National
32h 20m
2 stops
STL10:45 amLambert-St Louis
$705
Air Canada
Apr 11
STL4:05 pmLambert-St Louis
32h 05m
2 stops
BRU7:10 amBrussels Bruxelles-National
Apr 22
BRU9:25 amBrussels Bruxelles-National
36h 59m
2 stops
STL3:24 pmLambert-St Louis
$716
Air Canada
Apr 9
STL9:10 amLambert-St Louis
15h 00m
2 stops
BRU7:10 amBrussels Bruxelles-National
Apr 16
BRU9:40 amBrussels Bruxelles-National
12h 44m
1 stop
STL3:24 pmLambert-St Louis
$733

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 February 26, 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

Sat 5/2

1:03 pm-9:40 am

2 stops37h 37m

Brussels Bruxelles-National

Sat 5/9

3:15 pm-9:24 pm

2 stops37h 09m

$669

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sat 4/11

7:45 am-7:10 am

2 stops40h 25m

Brussels Bruxelles-National

Tue 4/21

9:25 am-9:08 pm

2 stops42h 43m

$691

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 4/8

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

Wed 4/15

7:00 am-3:24 pm

2 stops15h 24m

$693

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 4/8

12:15 pm-1:15 pm

2 stops18h 00m

Brussels Bruxelles-National

Wed 4/15

10:15 am-7:31 pm

1 stop16h 16m

$704

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 4/8

7:45 am-7:10 am

2 stops16h 25m

Brussels Bruxelles-National

Wed 4/15

9:25 am-10:45 am

2 stops32h 20m

$705

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 4/12

12:04 pm-7:40 am

1 stop12h 36m

Brussels Bruxelles-National

Tue 4/21

9:45 am-9:19 pm

1 stop18h 34m

$707

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 4/12

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

Wed 4/22

11:10 am-4:43 pm

1 stop12h 33m

$708

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sat 4/11

11:15 am-7:10 am

2 stops36h 55m

Brussels Bruxelles-National

Wed 4/22

10:15 am-9:08 pm

1 stop17h 53m

$711

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sat 4/11

7:45 am-7:10 am

2 stops40h 25m

Brussels Bruxelles-National

Wed 4/22

9:25 am-3:24 pm

2 stops36h 59m

$712

St. LouisBrussels

STL - CRL

STLCRL

Lambert-St Louis

Sun 8/16

12:10 pm-9:25 pm

2 stops26h 15m

Charleroi Brussels

Mon 8/24

9:15 pm-8:02 pm

3 stops29h 47m

$992

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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 $494. 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 $657.

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

You could potentially save up to 29% 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

14h 07m

Direct flights

None
The fastest flight from St. Louis to Belgium takes 14h 07m
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
7,810 reviews
Search Lufthansa flights
United AirlinesPriceFrom $606Free CancellationRating
7.4
9,348 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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