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Cheap flights from St. Louis to Brussels from $417

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 7/5. 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.
Lufthansa Logo
11:28 am - 1:10 pm
STL
-
BRU
19h 42m
2 stops
Lufthansa Logo
12:45 pm - 10:59 pm
BRU
-
STL
16h 14m
2 stops
$505Lufthansa
Wed, Mar 18 - Wed, Mar 25
United Airlines Logo
1:14 pm - 1:15 pm
STL
-
BRU
18h 01m
2 stops
United Airlines Logo
10:15 am - 9:07 pm
BRU
-
STL
16h 52m
2 stops
$510United Airlines
Tue, Mar 17 - Tue, Mar 24
Air Canada Logo
4:05 pm - 8:55 am
STL
-
BRU
34h 50m
2 stops
Air Canada Logo
10:00 am - 3:29 pm
BRU
-
STL
35h 29m
2 stops
$511Air Canada
Sun, Mar 8 - Sun, Mar 15
United Airlines Logo
7:00 pm - 7:55 am
STL
-
BRU
30h 55m
1 stop
United Airlines Logo
10:15 am - 9:07 pm
BRU
-
STL
16h 52m
2 stops
$514United Airlines
Tue, Mar 17 - Tue, Mar 24
United Airlines Logo
7:41 am - 7:55 am
STL
-
BRU
18h 14m
1 stop
United Airlines Logo
9:00 am - 3:29 pm
BRU
-
STL
36h 29m
2 stops
$515United Airlines
Sun, Mar 8 - Sun, Mar 15
United Airlines Logo
11:25 am - 7:55 am
STL
-
BRU
14h 30m
1 stop
United Airlines Logo
10:30 am - 9:42 pm
BRU
-
STL
17h 12m
2 stops
$516United Airlines
Wed, Mar 18 - Wed, Mar 25
Delta Logo
12:04 pm - 8:00 am
STL
-
BRU
13h 56m
1 stop
Delta Logo
2:45 pm - 9:05 am
BRU
-
STL
24h 20m
2 stops
$519Delta
Wed, Mar 18 - Wed, Mar 25
United Airlines Logo
11:25 am - 7:55 am
STL
-
BRU
14h 30m
1 stop
United Airlines Logo
10:10 am - 9:42 pm
BRU
-
STL
17h 32m
1 stop
$609United Airlines
Wed, Mar 18 - Wed, Mar 25
KLM Logo
5:21 pm - 8:00 am
STL
-
BRU
32h 39m
1 stop
KLM Logo
10:00 am - 9:05 am
BRU
-
STL
29h 05m
1 stop
$621KLM
Tue, Mar 17 - Tue, Mar 24
Lufthansa Logo
4:49 pm - 10:40 pm
STL
-
BRU
22h 51m
2 stops
Lufthansa Logo
7:00 am - 1:55 pm
BRU
-
STL
13h 55m
1 stop
$677Lufthansa
Tue, Mar 3 - Sun, Mar 8

Aer Lingus flights from St. Louis to Brussels Bruxelles-National Airport

Our best Aer Lingus deals on St. Louis to Brussels Bruxelles-National Airport flight tickets
Aer Lingus
Mar 25
STL6:00 amLambert-St Louis
21h 35m
2 stops
BRU9:35 amBrussels Bruxelles-National
Mar 31
BRU10:20 amBrussels Bruxelles-National
20h 24m
2 stops
STL11:44 pmLambert-St Louis
$865
Aer Lingus
Mar 26
STL6:00 amLambert-St Louis
32h 10m
2 stops
BRU8:10 pmBrussels Bruxelles-National
Apr 2
BRU10:20 amBrussels Bruxelles-National
20h 24m
2 stops
STL11:44 pmLambert-St Louis
$982
Aer Lingus
Feb 10
STL11:05 amLambert-St Louis
24h 10m
2 stops
BRU6:15 pmBrussels Bruxelles-National
Feb 17
BRU10:15 amBrussels Bruxelles-National
20h 33m
2 stops
STL11:48 pmLambert-St Louis
$1,025

United Airlines flights from St. Louis to Brussels Bruxelles-National Airport

Our best United Airlines deals on St. Louis to Brussels Bruxelles-National Airport flight tickets
United Airlines
Mar 17
STL11:25 amLambert-St Louis
19h 50m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Mar 24
BRU10:00 amBrussels Bruxelles-National
38h 00m
2 stops
STL6:00 pmLambert-St Louis
$486
United Airlines
Mar 17
STL7:00 pmLambert-St Louis
30h 55m
1 stop
BRU7:55 amBrussels Bruxelles-National
Mar 24
BRU10:00 amBrussels Bruxelles-National
38h 00m
2 stops
STL6:00 pmLambert-St Louis
$489
United Airlines
Mar 18
STL8:17 amLambert-St Louis
17h 38m
1 stop
BRU7:55 amBrussels Bruxelles-National
Mar 25
BRU10:15 amBrussels Bruxelles-National
16h 52m
2 stops
STL9:07 pmLambert-St Louis
$514

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Brussels Bruxelles-National Airport 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 February 10, 2026.
Use the filters below to find and compare flights from St. Louis to Brussels Bruxelles-National Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 3/18

11:28 am-1:10 pm

2 stops19h 42m

Brussels Bruxelles-National

Wed 3/25

12:45 pm-10:59 pm

2 stops16h 14m

$505

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 3/17

1:14 pm-1:15 pm

2 stops18h 01m

Brussels Bruxelles-National

Tue 3/24

10:15 am-9:07 pm

2 stops16h 52m

$510

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 3/8

4:05 pm-8:55 am

2 stops34h 50m

Brussels Bruxelles-National

Sun 3/15

10:00 am-3:29 pm

2 stops35h 29m

$511

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 3/17

7:00 pm-7:55 am

1 stop30h 55m

Brussels Bruxelles-National

Tue 3/24

10:15 am-9:07 pm

2 stops16h 52m

$514

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 3/8

7:41 am-7:55 am

1 stop18h 14m

Brussels Bruxelles-National

Sun 3/15

9:00 am-3:29 pm

2 stops36h 29m

$515

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 3/18

11:25 am-7:55 am

1 stop14h 30m

Brussels Bruxelles-National

Wed 3/25

10:30 am-9:42 pm

2 stops17h 12m

$516

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 3/18

12:04 pm-8:00 am

1 stop13h 56m

Brussels Bruxelles-National

Wed 3/25

2:45 pm-9:05 am

2 stops24h 20m

$519

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 3/18

11:25 am-7:55 am

1 stop14h 30m

Brussels Bruxelles-National

Wed 3/25

10:10 am-9:42 pm

1 stop17h 32m

$609

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 3/17

5:21 pm-8:00 am

1 stop32h 39m

Brussels Bruxelles-National

Tue 3/24

10:00 am-9:05 am

1 stop29h 05m

$621

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 3/3

4:49 pm-10:40 pm

2 stops22h 51m

Brussels Bruxelles-National

Sun 3/8

7:00 am-1:55 pm

1 stop13h 55m

$677

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 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 Bruxelles-National Airport

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 cheapest month to fly to Brussels Bruxelles-National Airport?

The cheapest month to fly to Brussels Bruxelles-National Airport from St. Louis is in February. Flight prices, which tend to average around $494, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Brussels Bruxelles-National Airport from St. Louis during January instead. Flights to Brussels Bruxelles-National Airport in January, while not as cheap as those in February, still average around $657.

Can stopping save me money on St. Louis to Brussels Bruxelles-National Airport flights?

You could potentially save up to 51% on your flight if you consider stops on a St. Louis to Brussels Bruxelles-National Airport flight.

When to book flights from St. Louis to Brussels Bruxelles-National Airport

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Brussels Bruxelles-National Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Brussels Bruxelles-National Airport (STL to BRU) flight deals and tips

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

Fastest flight time

11h 40m

Direct flights

None
The fastest flight from St. Louis to Brussels Bruxelles-National Airport takes 11h 40m
There are no direct flights from St. Louis to Brussels Bruxelles-National Airport. There are no popular flight routes from St. Louis to Brussels Bruxelles-National Airport.
Search flight deals

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

    The straight-line distance from Lambert-St Louis to Brussels Bruxelles-National is 4393.0 mi. Flights usually cover this in 11h 40m, depending on flying conditions and air traffic around both airports.

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

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

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

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

    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 Bruxelles-National Airport.

  • What documentation or ID do you need to fly to Brussels Bruxelles-National Airport?

    The travel and health documents required for your trip to Brussels Bruxelles-National Airport 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 Bruxelles-National Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from St. Louis to Brussels Bruxelles-National Airport?

Best airlines flying from St. Louis to Brussels Bruxelles-National Airport

Compare and see reviews for airlines that fly from St. Louis to Brussels Bruxelles-National Airport with momondo
Airline
Rating
Free Cancellation
Price
LufthansaPriceFrom $441Free CancellationRating
6.8
7,779 reviews
Search Lufthansa flights
United AirlinesPriceFrom $606Free CancellationRating
7.4
9,267 reviews
Search United Airlines flights

Traveling to a place near Brussels?

Book flights to Brussels if you plan to visit one of these locations
Ghent
Bruges
Leuven
Charleroi
Zaventem
Hasselt
Spa
Namur
Dinant
Genk
Mons
Waterloo
Durbuy
Aalst
Knokke-Heist
Mechelen
Francorchamps
Tournai
Oostkamp
Halle

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Brussels from St. Louis.

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

momondo does allow users to show only those flights to Brussels from St. Louis which offer a flexible booking policy as well as other useful filters and features.

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

Once all potential St. Louis to Brussels flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes momondo offers price alerts on flights to Brussels from St. Louis. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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