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Cheap flights from St. Louis to Brussels from $433

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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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.
American Airlines Logo
1:00 pm - 1:35 pm
STL
-
BRU
18h 35m
2 stops
American Airlines Logo
7:00 am - 7:27 pm
BRU
-
STL
19h 27m
2 stops
$813American Airlines
Tue, Oct 27 - Tue, Nov 3
Scandinavian Airlines Logo
1:30 pm - 8:50 pm
STL
-
BRU
24h 20m
2 stops
Scandinavian Airlines Logo
10:20 am - 11:39 pm
BRU
-
STL
20h 19m
2 stops
$824Scandinavian Airlines
Sat, Oct 24 - Wed, Nov 4
Air Canada Logo
4:15 pm - 8:00 pm
STL
-
BRU
21h 45m
2 stops
Air Canada Logo
10:00 am - 3:38 pm
BRU
-
STL
36h 38m
2 stops
$842Air Canada
Mon, Oct 26 - Tue, Nov 3
Air Canada Logo
6:49 pm - 8:50 am
STL
-
BRU
31h 01m
2 stops
Air Canada Logo
10:00 am - 3:38 pm
BRU
-
STL
36h 38m
2 stops
$845Air Canada
Sat, Oct 24 - Fri, Nov 6
Air Canada Logo
4:15 pm - 7:50 am
STL
-
BRU
33h 35m
2 stops
Air Canada Logo
10:00 am - 3:38 pm
BRU
-
STL
36h 38m
2 stops
$848Air Canada
Sun, Oct 25 - Fri, Nov 6
United Airlines Logo
6:40 am - 8:55 am
STL
-
BRU
20h 15m
1 stop
United Airlines Logo
7:00 am - 1:55 pm
BRU
-
STL
13h 55m
1 stop
$852United Airlines
Fri, Oct 30 - Wed, Nov 4
United Airlines Logo
4:15 pm - 1:15 pm
STL
-
BRU
15h 00m
2 stops
United Airlines Logo
7:00 am - 1:55 pm
BRU
-
STL
13h 55m
1 stop
$853United Airlines
Fri, Oct 30 - Wed, Nov 4
Scandinavian Airlines Logo
3:42 pm - 9:40 am
STL
-
BRU
35h 58m
2 stops
Scandinavian Airlines Logo
8:30 pm - 11:39 pm
BRU
-
STL
34h 09m
2 stops
$854Scandinavian Airlines
Fri, Oct 30 - Tue, Nov 3
Multiple Airlines Logo
8:55 am - 9:00 pm
STL
-
CRL
29h 05m
3 stops
Multiple Airlines Logo
7:55 am - 8:07 pm
CRL
-
STL
19h 12m
2 stops
$1,381Multiple Airlines
Mon, Aug 3 - Mon, Aug 10
Multiple Airlines Logo
12:10 pm - 9:00 pm
STL
-
CRL
25h 50m
2 stops
Multiple Airlines Logo
7:55 am - 8:07 pm
CRL
-
STL
19h 12m
2 stops
$1,385Multiple Airlines
Mon, Aug 3 - Mon, Aug 10

Lufthansa flights from St. Louis to Brussels

Our best Lufthansa deals on St. Louis to Brussels flight tickets
Lufthansa
Sep 30
STL3:30 pmLambert-St Louis
13h 20m
1 stop
BRU11:50 amBrussels Bruxelles-National
Oct 5
BRU7:30 pmBrussels Bruxelles-National
24h 55m
2 stops
STL1:25 pmLambert-St Louis
$948
Lufthansa
Sep 30
STL1:29 pmLambert-St Louis
26h 06m
2 stops
BRU10:35 pmBrussels Bruxelles-National
Oct 5
BRU5:30 pmBrussels Bruxelles-National
26h 55m
1 stop
STL1:25 pmLambert-St Louis
$967
Lufthansa
May 19
STL8:45 amLambert-St Louis
15h 30m
1 stop
BRU7:15 amBrussels Bruxelles-National
May 25
BRU9:55 amBrussels Bruxelles-National
17h 30m
1 stop
STL8:25 pmLambert-St Louis
$2,258

Air Canada flights from St. Louis to Brussels

Our best Air Canada deals on St. Louis to Brussels flight tickets
Air Canada
Oct 26
STL4:15 pmLambert-St Louis
39h 00m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Nov 4
BRU10:00 amBrussels Bruxelles-National
35h 18m
2 stops
STL2:18 pmLambert-St Louis
$842
Air Canada
Oct 24
STL6:49 pmLambert-St Louis
31h 01m
2 stops
BRU8:50 amBrussels Bruxelles-National
Nov 6
BRU10:00 amBrussels Bruxelles-National
36h 38m
2 stops
STL3:38 pmLambert-St Louis
$845
Air Canada
Oct 25
STL4:15 pmLambert-St Louis
33h 35m
2 stops
BRU7:50 amBrussels Bruxelles-National
Nov 6
BRU10:00 amBrussels Bruxelles-National
36h 38m
2 stops
STL3:38 pmLambert-St Louis
$848

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 May 16, 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

Tue 10/27

1:00 pm-1:35 pm

2 stops18h 35m

Brussels Bruxelles-National

Tue 11/3

7:00 am-7:27 pm

2 stops19h 27m

$813

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sat 10/24

1:30 pm-8:50 pm

2 stops24h 20m

Brussels Bruxelles-National

Wed 11/4

10:20 am-11:39 pm

2 stops20h 19m

$824

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 10/26

4:15 pm-8:00 pm

2 stops21h 45m

Brussels Bruxelles-National

Tue 11/3

10:00 am-3:38 pm

2 stops36h 38m

$842

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sat 10/24

6:49 pm-8:50 am

2 stops31h 01m

Brussels Bruxelles-National

Fri 11/6

10:00 am-3:38 pm

2 stops36h 38m

$845

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 10/25

4:15 pm-7:50 am

2 stops33h 35m

Brussels Bruxelles-National

Fri 11/6

10:00 am-3:38 pm

2 stops36h 38m

$848

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 10/30

6:40 am-8:55 am

1 stop20h 15m

Brussels Bruxelles-National

Wed 11/4

7:00 am-1:55 pm

1 stop13h 55m

$852
Quickest round-trip

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 10/30

4:15 pm-1:15 pm

2 stops15h 00m

Brussels Bruxelles-National

Wed 11/4

7:00 am-1:55 pm

1 stop13h 55m

$853

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 10/30

3:42 pm-9:40 am

2 stops35h 58m

Brussels Bruxelles-National

Tue 11/3

8:30 pm-11:39 pm

2 stops34h 09m

$854

St. LouisBrussels

STL - CRL

STLCRL

Lambert-St Louis

Mon 8/3

8:55 am-9:00 pm

3 stops29h 05m

Charleroi Brussels

Mon 8/10

7:55 am-8:07 pm

2 stops19h 12m

$1,381

St. LouisBrussels

STL - CRL

STLCRL

Lambert-St Louis

Mon 8/3

12:10 pm-9:00 pm

2 stops25h 50m

Charleroi Brussels

Mon 8/10

7:55 am-8:07 pm

2 stops19h 12m

$1,385

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

13h 58m

Direct flights

None
The fastest flight from St. Louis to Brussels takes 13h 58m
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 13h 58m.

  • 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
8,004 reviews
Search Lufthansa flights
United AirlinesPriceFrom $574Free CancellationRating
7.4
9,727 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