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Cheap flights from St. Louis to Brussels from $382

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 Brussels departing on 8/3. 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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Find the cheapest flights from St. Louis to Brussels

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
1:10 pm - 1:15 pm
STL
-
BRU
17h 05m
2 stops
United Airlines Logo
9:55 am - 8:25 pm
BRU
-
STL
17h 30m
1 stop
$844United Airlines
Sun, Apr 26 - Sun, May 3
United Airlines Logo
1:10 pm - 9:00 am
STL
-
BRU
12h 50m
1 stop
United Airlines Logo
9:55 am - 8:25 pm
BRU
-
STL
17h 30m
1 stop
$848United Airlines
Sun, Apr 26 - Sun, May 3
United Airlines Logo
1:05 pm - 1:15 pm
STL
-
BRU
17h 10m
2 stops
United Airlines Logo
9:55 am - 8:25 pm
BRU
-
STL
17h 30m
1 stop
$849United Airlines
Wed, May 13 - Wed, May 20
United Airlines Logo
1:10 pm - 1:15 pm
STL
-
BRU
17h 05m
2 stops
United Airlines Logo
7:00 am - 8:25 pm
BRU
-
STL
20h 25m
2 stops
$851United Airlines
Sun, Apr 26 - Sun, May 3
United Airlines Logo
1:05 pm - 7:10 am
STL
-
BRU
11h 05m
1 stop
United Airlines Logo
9:55 am - 8:25 pm
BRU
-
STL
17h 30m
1 stop
$852United Airlines
Wed, May 13 - Wed, May 20
United Airlines Logo
9:21 am - 7:15 am
STL
-
BRU
14h 54m
2 stops
United Airlines Logo
11:10 am - 6:53 pm
BRU
-
STL
14h 43m
2 stops
$865United Airlines
Wed, May 13 - Wed, May 20
United Airlines Logo
7:45 am - 9:00 am
STL
-
BRU
18h 15m
1 stop
United Airlines Logo
7:00 am - 1:25 pm
BRU
-
STL
13h 25m
1 stop
$907United Airlines
Fri, May 1 - Fri, Sep 18
United Airlines Logo
1:05 pm - 1:15 pm
STL
-
BRU
17h 10m
2 stops
United Airlines Logo
9:40 am - 12:06 pm
BRU
-
STL
33h 26m
1 stop
$910United Airlines
Mon, May 18 - Tue, May 26
Multiple Airlines Logo
7:05 am - 9:30 pm
STL
-
CRL
31h 25m
3 stops
Multiple Airlines Logo
9:55 pm - 8:25 pm
CRL
-
STL
29h 30m
3 stops
$1,126Multiple Airlines
Mon, May 18 - Tue, May 26
Multiple Airlines Logo
7:05 am - 10:25 pm
STL
-
CRL
32h 20m
3 stops
Multiple Airlines Logo
12:15 pm - 1:25 pm
CRL
-
STL
32h 10m
2 stops
$1,955Multiple Airlines
Sat, May 16 - Sat, May 23

Air Canada flights from St. Louis to Brussels

Our best Air Canada deals on St. Louis to Brussels flight tickets
Air Canada
May 12
STL1:05 pmLambert-St Louis
11h 05m
1 stop
BRU7:10 amBrussels Bruxelles-National
May 19
BRU9:40 amBrussels Bruxelles-National
33h 26m
1 stop
STL12:06 pmLambert-St Louis
$825
Air Canada
May 12
STL1:05 pmLambert-St Louis
17h 10m
2 stops
BRU1:15 pmBrussels Bruxelles-National
May 19
BRU9:40 amBrussels Bruxelles-National
17h 45m
2 stops
STL8:25 pmLambert-St Louis
$833
Air Canada
May 18
STL7:05 amLambert-St Louis
42h 50m
2 stops
BRU8:55 amBrussels Bruxelles-National
May 26
BRU9:55 amBrussels Bruxelles-National
33h 11m
2 stops
STL12:06 pmLambert-St Louis
$917

United Airlines flights from St. Louis to Brussels

Our best United Airlines deals on St. Louis to Brussels flight tickets
United Airlines
Apr 26
STL1:10 pmLambert-St Louis
17h 05m
2 stops
BRU1:15 pmBrussels Bruxelles-National
May 3
BRU9:55 amBrussels Bruxelles-National
17h 30m
1 stop
STL8:25 pmLambert-St Louis
$844
United Airlines
Apr 26
STL1:10 pmLambert-St Louis
12h 50m
1 stop
BRU9:00 amBrussels Bruxelles-National
May 3
BRU9:55 amBrussels Bruxelles-National
17h 30m
1 stop
STL8:25 pmLambert-St Louis
$848
United Airlines
May 13
STL1:05 pmLambert-St Louis
17h 10m
2 stops
BRU1:15 pmBrussels Bruxelles-National
May 20
BRU9:55 amBrussels Bruxelles-National
17h 30m
1 stop
STL8:25 pmLambert-St Louis
$849

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Brussels 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 April 2, 2026.
Use the filters below to find and compare flights from St. Louis to Brussels that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 4/26

1:10 pm-1:15 pm

2 stops17h 05m

Brussels Bruxelles-National

Sun 5/3

9:55 am-8:25 pm

1 stop17h 30m

$844

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 4/26

1:10 pm-9:00 am

1 stop12h 50m

Brussels Bruxelles-National

Sun 5/3

9:55 am-8:25 pm

1 stop17h 30m

$848

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 5/13

1:05 pm-1:15 pm

2 stops17h 10m

Brussels Bruxelles-National

Wed 5/20

9:55 am-8:25 pm

1 stop17h 30m

$849

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 4/26

1:10 pm-1:15 pm

2 stops17h 05m

Brussels Bruxelles-National

Sun 5/3

7:00 am-8:25 pm

2 stops20h 25m

$851
Quickest round-trip

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 5/13

1:05 pm-7:10 am

1 stop11h 05m

Brussels Bruxelles-National

Wed 5/20

9:55 am-8:25 pm

1 stop17h 30m

$852

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 5/13

9:21 am-7:15 am

2 stops14h 54m

Brussels Bruxelles-National

Wed 5/20

11:10 am-6:53 pm

2 stops14h 43m

$865

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 5/1

7:45 am-9:00 am

1 stop18h 15m

Brussels Bruxelles-National

Fri 9/18

7:00 am-1:25 pm

1 stop13h 25m

$907

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 5/18

1:05 pm-1:15 pm

2 stops17h 10m

Brussels Bruxelles-National

Tue 5/26

9:40 am-12:06 pm

1 stop33h 26m

$910

St. LouisBrussels

STL - CRL

STLCRL

Lambert-St Louis

Mon 5/18

7:05 am-9:30 pm

3 stops31h 25m

Charleroi Brussels

Tue 5/26

9:55 pm-8:25 pm

3 stops29h 30m

$1,126

St. LouisBrussels

STL - CRL

STLCRL

Lambert-St Louis

Sat 5/16

7:05 am-10:25 pm

3 stops32h 20m

Charleroi Brussels

Sat 5/23

12:15 pm-1:25 pm

2 stops32h 10m

$1,955

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 Brussels from

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

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 typical price of a round-trip flight between St. Louis and Brussels?

What is the cheapest month to fly to Brussels?

In general, February is the cheapest month to fly from St. Louis to Brussels. 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 Brussels during the month of February, then departing from St. Louis during the month April is also very affordable. Most momondo users find prices during this month for around $606.

Cheap St. Louis to Brussels flight deals and tips

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

Fastest flight time

15h 50m

Direct flights

None
The fastest flight from St. Louis to Brussels takes 15h 50m
There are no direct flights from St. Louis to Brussels. There are no popular flight routes from St. Louis to Brussels.
Search flight deals

Frequently asked questions about flying from St. Louis to Brussels

  • How far is Lambert-St Louis to Brussels by plane?

    There are 4389.6 mi between Lambert-St Louis and Brussels. By plane, this route typically takes 15h 50m.

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

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

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

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

    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 Brussels.

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

    The travel and health documents required for your trip to Brussels 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 Brussels. 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 Brussels

Compare and see reviews for airlines that fly from St. Louis to Brussels with momondo
Airline
Rating
Free Cancellation
Price
LufthansaPriceFrom $441Free CancellationRating
6.8
7,883 reviews
Search Lufthansa flights
United AirlinesPriceFrom $606Free CancellationRating
7.4
9,533 reviews
Search United Airlines flights

Why use momondo?

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

Finding the right flight to Brussels from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Brussels quick and easy, saving you time and money.

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

Yes. momondo enables you to select and highlight flights to Brussels from St. Louis with this policy.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to Brussels.

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

If you are simply researching potential flights to Brussels, momondo offers a useful price alert feature which will track prices for flights to Brussels from St. Louis and alert you when they change.

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Find better results for your trip to Belgium

Fly into one of these airports located in Brussels

Airports listed have a maximum distance of 27.4 mi from Brussels
Brussels Bruxelles-National Airport
Charleroi Brussels Airport