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Cheap flights from St. Louis to Brussels from $337

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 11/4. 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

Discover deals from 900+ travel sites with momondo.

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
3:15 pm - 1:15 pm
STL
-
BRU
15h 00m
2 stops
United Airlines Logo
11:15 am - 9:51 pm
BRU
-
STL
17h 36m
1 stop
$746United Airlines
Mon, Nov 16 - Thu, Nov 19
United Airlines Logo
2:00 pm - 8:05 am
STL
-
BRU
11h 05m
1 stop
United Airlines Logo
10:10 am - 6:06 pm
BRU
-
STL
14h 56m
1 stop
$750United Airlines
Mon, Nov 16 - Thu, Nov 19
United Airlines Logo
3:15 pm - 1:15 pm
STL
-
BRU
15h 00m
2 stops
United Airlines Logo
11:15 am - 9:13 pm
BRU
-
STL
16h 58m
2 stops
$751United Airlines
Mon, Nov 16 - Thu, Nov 19
Multiple Airlines Logo
12:10 pm - 7:10 am
STL
-
BRU
12h 00m
1 stop
Multiple Airlines Logo
9:30 am - 6:42 pm
BRU
-
STL
16h 12m
1 stop
$814Multiple Airlines
Sun, Aug 16 - Tue, Aug 25
Multiple Airlines Logo
12:10 pm - 7:10 am
STL
-
BRU
12h 00m
1 stop
Multiple Airlines Logo
9:55 am - 6:42 pm
BRU
-
STL
15h 47m
2 stops
$816Multiple Airlines
Sun, Aug 16 - Tue, Aug 25
Air Canada Logo
8:55 am - 7:10 am
STL
-
BRU
15h 15m
2 stops
Air Canada Logo
9:30 am - 8:24 pm
BRU
-
STL
17h 54m
2 stops
$839Air Canada
Sun, Aug 16 - Tue, Aug 25
Air Canada Logo
5:36 pm - 7:10 am
STL
-
BRU
54h 34m
2 stops
Air Canada Logo
9:10 am - 6:41 pm
BRU
-
STL
16h 31m
1 stop
$863Air Canada
Fri, Oct 2 - Fri, Oct 16
Multiple Airlines Logo
12:10 pm - 1:15 pm
STL
-
BRU
18h 05m
2 stops
Multiple Airlines Logo
7:30 pm - 1:25 pm
BRU
-
STL
24h 55m
1 stop
$867Multiple Airlines
Wed, Sep 30 - Mon, Oct 5
Multiple Airlines Logo
12:10 pm - 1:15 pm
STL
-
BRU
18h 05m
2 stops
Multiple Airlines Logo
5:30 pm - 1:25 pm
BRU
-
STL
26h 55m
1 stop
$868Multiple Airlines
Wed, Sep 30 - Mon, Oct 5
Multiple Airlines Logo
12:10 pm - 1:15 pm
STL
-
BRU
18h 05m
2 stops
Multiple Airlines Logo
5:30 pm - 1:25 pm
BRU
-
STL
26h 55m
1 stop
$869Multiple Airlines
Wed, Sep 30 - Mon, Oct 5

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United Airlines flights from St. Louis to Brussels

Our best United Airlines deals on St. Louis to Brussels flight tickets
United Airlines
Nov 16
STL3:15 pmLambert-St Louis
15h 00m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Nov 19
BRU11:15 amBrussels Bruxelles-National
17h 36m
1 stop
STL9:51 pmLambert-St Louis
$746
United Airlines
Nov 16
STL2:00 pmLambert-St Louis
11h 05m
1 stop
BRU8:05 amBrussels Bruxelles-National
Nov 19
BRU10:10 amBrussels Bruxelles-National
14h 56m
1 stop
STL6:06 pmLambert-St Louis
$750
United Airlines
Nov 16
STL3:15 pmLambert-St Louis
15h 00m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Nov 19
BRU11:15 amBrussels Bruxelles-National
16h 58m
2 stops
STL9:13 pmLambert-St Louis
$751

Air Canada flights from St. Louis to Brussels

Our best Air Canada deals on St. Louis to Brussels flight tickets
Air Canada
Aug 16
STL8:55 amLambert-St Louis
15h 15m
2 stops
BRU7:10 amBrussels Bruxelles-National
Aug 25
BRU9:30 amBrussels Bruxelles-National
17h 54m
2 stops
STL8:24 pmLambert-St Louis
$839
Air Canada
Oct 2
STL5:36 pmLambert-St Louis
54h 34m
2 stops
BRU7:10 amBrussels Bruxelles-National
Oct 16
BRU9:10 amBrussels Bruxelles-National
16h 31m
1 stop
STL6:41 pmLambert-St Louis
$863
Air Canada
Aug 24
STL12:10 pmLambert-St Louis
24h 50m
2 stops
BRU8:00 pmBrussels Bruxelles-National
Sep 5
BRU9:30 amBrussels Bruxelles-National
33h 32m
2 stops
STL12:02 pmLambert-St Louis
$894

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 27, 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 11/16

3:15 pm-1:15 pm

2 stops15h 00m

Brussels Bruxelles-National

Thu 11/19

11:15 am-9:51 pm

1 stop17h 36m

$746
Quickest round-trip

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 11/16

2:00 pm-8:05 am

1 stop11h 05m

Brussels Bruxelles-National

Thu 11/19

10:10 am-6:06 pm

1 stop14h 56m

$750

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 11/16

3:15 pm-1:15 pm

2 stops15h 00m

Brussels Bruxelles-National

Thu 11/19

11:15 am-9:13 pm

2 stops16h 58m

$751

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 8/16

12:10 pm-7:10 am

1 stop12h 00m

Brussels Bruxelles-National

Tue 8/25

9:30 am-6:42 pm

1 stop16h 12m

$814

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 8/16

12:10 pm-7:10 am

1 stop12h 00m

Brussels Bruxelles-National

Tue 8/25

9:55 am-6:42 pm

2 stops15h 47m

$816

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 8/16

8:55 am-7:10 am

2 stops15h 15m

Brussels Bruxelles-National

Tue 8/25

9:30 am-8:24 pm

2 stops17h 54m

$839

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 10/2

5:36 pm-7:10 am

2 stops54h 34m

Brussels Bruxelles-National

Fri 10/16

9:10 am-6:41 pm

1 stop16h 31m

$863

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

12:10 pm-1:15 pm

2 stops18h 05m

Brussels Bruxelles-National

Mon 10/5

7:30 pm-1:25 pm

1 stop24h 55m

$867

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

12:10 pm-1:15 pm

2 stops18h 05m

Brussels Bruxelles-National

Mon 10/5

5:30 pm-1:25 pm

1 stop26h 55m

$868

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/30

12:10 pm-1:15 pm

2 stops18h 05m

Brussels Bruxelles-National

Mon 10/5

5:30 pm-1:25 pm

1 stop26h 55m

$869

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, 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

12h 00m

Direct flights

None
The fastest flight from St. Louis to Brussels takes 12h 00m
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 12h 00m.

  • 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
8,103 reviews
Search Lufthansa flights
United AirlinesPriceFrom $574Free CancellationRating
7.4
9,896 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