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Cheap flights from St. Louis to Brussels from $381

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 8/23. 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 Brussels

Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
9:40 pm - 8:00 pm
STL
-
BRU
15h 20m
1 stop
British Airways Logo
11:50 am - 11:58 pm
BRU
-
STL
19h 08m
2 stops
$818British Airways
Sun, Aug 23 - Wed, Dec 9
American Airlines Logo
5:43 pm - 2:10 pm
STL
-
BRU
13h 27m
2 stops
American Airlines Logo
11:50 am - 11:59 pm
BRU
-
STL
19h 09m
2 stops
$820American Airlines
Sun, Aug 23 - Wed, Dec 9
Multiple Airlines Logo
12:10 pm - 7:10 am
STL
-
BRU
12h 00m
1 stop
Multiple Airlines Logo
7:00 am - 1:55 pm
BRU
-
STL
13h 55m
1 stop
$831Multiple Airlines
Sun, Aug 23 - Wed, Dec 9
United Airlines Logo
1:05 pm - 1:15 pm
STL
-
BRU
17h 10m
2 stops
United Airlines Logo
9:55 am - 11:41 am
BRU
-
STL
32h 46m
2 stops
$836United Airlines
Wed, May 13 - Wed, May 20
Multiple Airlines Logo
12:10 pm - 1:15 pm
STL
-
BRU
18h 05m
2 stops
Multiple Airlines Logo
7:00 am - 1:55 pm
BRU
-
STL
13h 55m
1 stop
$838Multiple Airlines
Mon, Aug 24 - Wed, Dec 9
United Airlines Logo
1:05 pm - 7:10 am
STL
-
BRU
11h 05m
1 stop
United Airlines Logo
9:55 am - 11:41 am
BRU
-
STL
32h 46m
2 stops
$840United Airlines
Wed, May 13 - Wed, May 20
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
$853United Airlines
Wed, May 13 - Wed, May 20
United Airlines Logo
1:18 pm - 9:00 am
STL
-
BRU
12h 42m
1 stop
United Airlines Logo
7:00 am - 1:55 pm
BRU
-
STL
13h 55m
1 stop
$859United Airlines
Mon, Aug 24 - Wed, Dec 9
British Airways Logo
9:35 pm - 9:55 am
STL
-
BRU
29h 20m
1 stop
British Airways Logo
8:50 pm - 7:30 pm
BRU
-
STL
29h 40m
1 stop
$880British Airways
Wed, Sep 30 - Mon, Oct 5
British Airways Logo
9:35 pm - 8:25 pm
STL
-
BRU
15h 50m
1 stop
British Airways Logo
8:50 pm - 7:30 pm
BRU
-
STL
29h 40m
1 stop
$881British Airways
Wed, Sep 30 - Mon, Oct 5

British Airways flights from St. Louis to Brussels

Our best British Airways deals on St. Louis to Brussels flight tickets
British Airways
Aug 23
STL9:40 pmLambert-St Louis
15h 20m
1 stop
BRU8:00 pmBrussels Bruxelles-National
Dec 9
BRU11:50 amBrussels Bruxelles-National
19h 08m
2 stops
STL11:58 pmLambert-St Louis
$818
British Airways
Sep 30
STL9:35 pmLambert-St Louis
29h 20m
1 stop
BRU9:55 amBrussels Bruxelles-National
Oct 5
BRU8:50 pmBrussels Bruxelles-National
29h 40m
1 stop
STL7:30 pmLambert-St Louis
$880
British Airways
Sep 30
STL9:35 pmLambert-St Louis
15h 50m
1 stop
BRU8:25 pmBrussels Bruxelles-National
Oct 5
BRU8:50 pmBrussels Bruxelles-National
29h 40m
1 stop
STL7:30 pmLambert-St Louis
$881

Air Canada flights from St. Louis to Brussels

Our best Air Canada deals on St. Louis to Brussels flight tickets
Air Canada
May 17
STL7:05 amLambert-St Louis
17h 45m
1 stop
BRU7:50 amBrussels Bruxelles-National
May 26
BRU9:55 amBrussels Bruxelles-National
17h 30m
1 stop
STL8:25 pmLambert-St Louis
$886
Air Canada
May 17
STL7:05 amLambert-St Louis
17h 45m
1 stop
BRU7:50 amBrussels Bruxelles-National
May 26
BRU9:55 amBrussels Bruxelles-National
17h 14m
2 stops
STL8:09 pmLambert-St Louis
$888
Air Canada
May 19
STL7:05 amLambert-St Louis
17h 05m
2 stops
BRU7:10 amBrussels Bruxelles-National
May 26
BRU9:55 amBrussels Bruxelles-National
35h 28m
2 stops
STL2:23 pmLambert-St Louis
$904

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 19, 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 8/23

9:40 pm-8:00 pm

1 stop15h 20m

Brussels Bruxelles-National

Wed 12/9

11:50 am-11:58 pm

2 stops19h 08m

$818

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 8/23

5:43 pm-2:10 pm

2 stops13h 27m

Brussels Bruxelles-National

Wed 12/9

11:50 am-11:59 pm

2 stops19h 09m

$820
Quickest round-trip

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 8/23

12:10 pm-7:10 am

1 stop12h 00m

Brussels Bruxelles-National

Wed 12/9

7:00 am-1:55 pm

1 stop13h 55m

$831

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-11:41 am

2 stops32h 46m

$836

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 8/24

12:10 pm-1:15 pm

2 stops18h 05m

Brussels Bruxelles-National

Wed 12/9

7:00 am-1:55 pm

1 stop13h 55m

$838

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-11:41 am

2 stops32h 46m

$840

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

$853

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 8/24

1:18 pm-9:00 am

1 stop12h 42m

Brussels Bruxelles-National

Wed 12/9

7:00 am-1:55 pm

1 stop13h 55m

$859

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

9:35 pm-9:55 am

1 stop29h 20m

Brussels Bruxelles-National

Mon 10/5

8:50 pm-7:30 pm

1 stop29h 40m

$880

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

9:35 pm-8:25 pm

1 stop15h 50m

Brussels Bruxelles-National

Mon 10/5

8:50 pm-7:30 pm

1 stop29h 40m

$881

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 January is also very affordable. Most momondo users find prices during this month for around $657.

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

11h 05m

Direct flights

None
The fastest flight from St. Louis to Brussels takes 11h 05m
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 11h 05m.

  • 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
7,930 reviews
Search Lufthansa flights
United AirlinesPriceFrom $606Free CancellationRating
7.4
9,603 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.

An easier way to manage your Brussels trip

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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