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Cheap flights from St. Louis to Brussels from $446

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.
1 adult
1 adult, Economy, 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.
Scandinavian Airlines Logo
3:39 pm - 6:30 pm
STL
-
BRU
19h 51m
2 stops
Scandinavian Airlines Logo
10:20 am - 11:37 pm
BRU
-
STL
20h 17m
2 stops
$809Scandinavian Airlines
Mon, Sep 7 - Fri, Sep 11
Scandinavian Airlines Logo
3:39 pm - 9:40 am
STL
-
BRU
35h 01m
2 stops
Scandinavian Airlines Logo
8:30 pm - 8:38 pm
BRU
-
STL
31h 08m
2 stops
$819Scandinavian Airlines
Mon, Aug 24 - Sat, Sep 5
Multiple Airlines Logo
4:54 pm - 2:25 pm
STL
-
BRU
14h 31m
2 stops
Multiple Airlines Logo
11:20 am - 12:14 am
BRU
-
STL
19h 54m
2 stops
$860Multiple Airlines
Mon, Aug 10 - Thu, Aug 20
American Airlines Logo
2:47 pm - 3:15 pm
STL
-
BRU
17h 28m
2 stops
American Airlines Logo
7:05 am - 8:08 pm
BRU
-
STL
20h 03m
2 stops
$865American Airlines
Tue, Oct 6 - Tue, Oct 13
Multiple Airlines Logo
12:46 pm - 3:05 pm
STL
-
BRU
19h 19m
2 stops
Multiple Airlines Logo
7:05 pm - 10:00 pm
BRU
-
STL
33h 55m
2 stops
$871Multiple Airlines
Wed, Sep 30 - Mon, Oct 5
American Airlines Logo
4:51 pm - 3:15 pm
STL
-
BRU
15h 24m
2 stops
American Airlines Logo
10:55 am - 11:25 pm
BRU
-
STL
19h 30m
2 stops
$872American Airlines
Tue, Oct 13 - Tue, Oct 20
British Airways Logo
9:35 pm - 3:15 pm
STL
-
BRU
10h 40m
1 stop
British Airways Logo
7:55 pm - 7:30 pm
BRU
-
STL
30h 35m
1 stop
$882British Airways
Tue, Oct 6 - Tue, Oct 13
British Airways Logo
9:40 pm - 10:05 am
STL
-
BRU
29h 25m
1 stop
British Airways Logo
11:00 am - 7:30 pm
BRU
-
STL
15h 30m
1 stop
$883British Airways
Sun, Oct 11 - Wed, Oct 21
Multiple Airlines Logo
11:01 am - 6:20 pm
STL
-
BRU
24h 19m
2 stops
Multiple Airlines Logo
7:05 pm - 10:00 pm
BRU
-
STL
33h 55m
2 stops
$884Multiple Airlines
Wed, Sep 30 - Mon, Oct 5
Multiple Airlines Logo
12:10 pm - 7:10 am
STL
-
BRU
12h 00m
1 stop
Multiple Airlines Logo
9:25 am - 6:41 pm
BRU
-
STL
16h 16m
1 stop
$908Multiple Airlines
Mon, Oct 12 - Wed, Oct 21

Lufthansa flights from St. Louis to Brussels

Our best Lufthansa deals on St. Louis to Brussels flight tickets
Lufthansa
Sep 30
STL12:10 pmLambert-St Louis
12h 00m
1 stop
BRU7:10 amBrussels Bruxelles-National
Oct 5
BRU7:30 pmBrussels Bruxelles-National
24h 55m
1 stop
STL1:25 pmLambert-St Louis
$933
Lufthansa
Sep 30
STL3:11 pmLambert-St Louis
10h 49m
1 stop
BRU9:00 amBrussels Bruxelles-National
Oct 5
BRU2:25 pmBrussels Bruxelles-National
30h 46m
2 stops
STL2:11 pmLambert-St Louis
$944
Lufthansa
Jul 6
STL12:10 pmLambert-St Louis
12h 00m
1 stop
BRU7:10 amBrussels Bruxelles-National
Jul 21
BRU9:30 amBrussels Bruxelles-National
16h 12m
1 stop
STL6:42 pmLambert-St Louis
$948

Air Canada flights from St. Louis to Brussels

Our best Air Canada deals on St. Louis to Brussels flight tickets
Air Canada
Oct 14
STL2:40 pmLambert-St Louis
15h 35m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Oct 23
BRU9:10 amBrussels Bruxelles-National
16h 31m
1 stop
STL6:41 pmLambert-St Louis
$910
Air Canada
Oct 11
STL8:00 amLambert-St Louis
16h 10m
2 stops
BRU7:10 amBrussels Bruxelles-National
Oct 22
BRU9:10 amBrussels Bruxelles-National
16h 31m
1 stop
STL6:41 pmLambert-St Louis
$913
Air Canada
Aug 10
STL12:10 pmLambert-St Louis
12h 00m
1 stop
BRU7:10 amBrussels Bruxelles-National
Aug 20
BRU9:30 amBrussels Bruxelles-National
17h 52m
2 stops
STL8:22 pmLambert-St Louis
$914

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 June 4, 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

Mon 9/7

3:39 pm-6:30 pm

2 stops19h 51m

Brussels Bruxelles-National

Fri 9/11

10:20 am-11:37 pm

2 stops20h 17m

$809

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 8/24

3:39 pm-9:40 am

2 stops35h 01m

Brussels Bruxelles-National

Sat 9/5

8:30 pm-8:38 pm

2 stops31h 08m

$819

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 8/10

4:54 pm-2:25 pm

2 stops14h 31m

Brussels Bruxelles-National

Thu 8/20

11:20 am-12:14 am

2 stops19h 54m

$860

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 10/6

2:47 pm-3:15 pm

2 stops17h 28m

Brussels Bruxelles-National

Tue 10/13

7:05 am-8:08 pm

2 stops20h 03m

$865

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

12:46 pm-3:05 pm

2 stops19h 19m

Brussels Bruxelles-National

Mon 10/5

7:05 pm-10:00 pm

2 stops33h 55m

$871

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 10/13

4:51 pm-3:15 pm

2 stops15h 24m

Brussels Bruxelles-National

Tue 10/20

10:55 am-11:25 pm

2 stops19h 30m

$872

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 10/6

9:35 pm-3:15 pm

1 stop10h 40m

Brussels Bruxelles-National

Tue 10/13

7:55 pm-7:30 pm

1 stop30h 35m

$882

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 10/11

9:40 pm-10:05 am

1 stop29h 25m

Brussels Bruxelles-National

Wed 10/21

11:00 am-7:30 pm

1 stop15h 30m

$883

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

11:01 am-6:20 pm

2 stops24h 19m

Brussels Bruxelles-National

Mon 10/5

7:05 pm-10:00 pm

2 stops33h 55m

$884
Quickest round-trip

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 10/12

12:10 pm-7:10 am

1 stop12h 00m

Brussels Bruxelles-National

Wed 10/21

9:25 am-6:41 pm

1 stop16h 16m

$908

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 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, April 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 $414. If you are unable to visit Brussels during the month of April, then departing from St. Louis during the month March is also very affordable. Most momondo users find prices during this month for around $441.

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

10h 40m

Direct flights

None
The fastest flight from St. Louis to Brussels takes 10h 40m
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 10h 40m.

  • 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
8,036 reviews
Search Lufthansa flights
United AirlinesPriceFrom $574Free CancellationRating
7.4
9,774 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