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Cheap flights from St. Louis to Brussels from $380

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 11/15. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
1:10 pm - 1:15 pmSTL-BRU
17h 05m2 stops
United Airlines Logo
10:00 am - 3:46 pmBRU-STL
36h 46m2 stops
$530United Airlines
Find Deal
Wed, Nov 12 - Thu, Nov 27
Air Canada Logo
4:05 pm - 1:15 pmSTL-BRU
14h 10m2 stops
Air Canada Logo
10:00 am - 3:46 pmBRU-STL
36h 46m2 stops
$532Air Canada
Find Deal
Wed, Nov 12 - Thu, Nov 27
United Airlines Logo
1:10 pm - 7:15 amSTL-BRU
11h 05m1 stop
United Airlines Logo
10:00 am - 5:39 pmBRU-STL
38h 39m2 stops
$533United Airlines
Find Deal
Wed, Nov 12 - Thu, Nov 27
Lufthansa Logo
10:00 am - 8:55 amSTL-BRU
15h 55m1 stop
Lufthansa Logo
10:10 am - 5:03 pmBRU-STL
13h 53m1 stop
$555Lufthansa
Find Deal
Thu, Nov 27 - Thu, Dec 4
United Airlines Logo
3:19 pm - 1:15 pmSTL-BRU
14h 56m2 stops
United Airlines Logo
10:00 am - 5:54 pmBRU-STL
38h 54m2 stops
$625United Airlines
Find Deal
Mon, Dec 15 - Thu, Dec 25
Multiple Airlines Logo
4:05 pm - 1:15 pmSTL-BRU
14h 10m2 stops
Multiple Airlines Logo
9:10 pm - 3:29 pmBRU-STL
49h 19m2 stops
$665Multiple Airlines
Find Deal
Mon, Nov 24 - Mon, Dec 1
Lufthansa Logo
3:50 pm - 10:10 amSTL-BRU
11h 20m1 stop
Lufthansa Logo
7:30 pm - 1:55 pmBRU-STL
25h 25m1 stop
$693Lufthansa
Find Deal
Wed, Nov 12 - Thu, Nov 27
British Airways Logo
10:01 am - 10:30 amSTL-BRU
41h 29m2 stops
British Airways Logo
3:00 pm - 10:59 pmBRU-STL
38h 59m2 stops
$766British Airways
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Fri, Jan 2 - Mon, Jan 12
Scandinavian Airlines Logo
9:47 am - 2:30 pmSTL-BRU
21h 43m2 stops
Scandinavian Airlines Logo
10:20 am - 8:39 pmBRU-STL
17h 19m2 stops
$1,005Scandinavian Airlines
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Sat, Jan 3 - Fri, Jan 9
Scandinavian Airlines Logo
12:55 pm - 2:30 pmSTL-BRU
18h 35m2 stops
Scandinavian Airlines Logo
3:10 pm - 8:39 pmBRU-STL
36h 29m2 stops
$1,039Scandinavian Airlines
Find Deal
Sat, Jan 3 - Thu, Jan 8

United Airlines flights from St. Louis to Brussels

Our best United Airlines deals on St. Louis to Brussels flight tickets
United Airlines
Nov 12
STL1:10 pmLambert-St Louis
17h 05m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Nov 27
BRU10:00 amBrussels Bruxelles-National
36h 46m
2 stops
STL3:46 pmLambert-St Louis
$530
Find similar
United Airlines
Nov 12
STL1:10 pmLambert-St Louis
11h 05m
1 stop
BRU7:15 amBrussels Bruxelles-National
Nov 27
BRU10:00 amBrussels Bruxelles-National
38h 39m
2 stops
STL5:39 pmLambert-St Louis
$533
Find similar
United Airlines
Dec 15
STL3:19 pmLambert-St Louis
14h 56m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Dec 25
BRU10:00 amBrussels Bruxelles-National
38h 54m
2 stops
STL5:54 pmLambert-St Louis
$625
Find similar

Lufthansa flights from St. Louis to Brussels

Our best Lufthansa deals on St. Louis to Brussels flight tickets
Lufthansa
Nov 27
STL10:00 amLambert-St Louis
15h 55m
1 stop
BRU8:55 amBrussels Bruxelles-National
Dec 4
BRU10:10 amBrussels Bruxelles-National
13h 53m
1 stop
STL5:03 pmLambert-St Louis
$555
Find similar
Lufthansa
Nov 12
STL3:50 pmLambert-St Louis
11h 20m
1 stop
BRU10:10 amBrussels Bruxelles-National
Nov 27
BRU7:30 pmBrussels Bruxelles-National
25h 25m
1 stop
STL1:55 pmLambert-St Louis
$693
Find similar
Lufthansa
Jan 3
STL6:35 pmLambert-St Louis
31h 20m
1 stop
BRU8:55 amBrussels Bruxelles-National
Jan 10
BRU2:25 pmBrussels Bruxelles-National
40h 34m
2 stops
STL11:59 pmLambert-St Louis
$1,327
Find similar

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 October 14, 2025.
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

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 11/12

1:10 pm-1:15 pm

2 stops17h 05m

Brussels Bruxelles-National

Thu 11/27

10:00 am-3:46 pm

2 stops36h 46m

$530

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 11/12

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

Thu 11/27

10:00 am-3:46 pm

2 stops36h 46m

$532

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 11/12

1:10 pm-7:15 am

1 stop11h 05m

Brussels Bruxelles-National

Thu 11/27

10:00 am-5:39 pm

2 stops38h 39m

$533

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Thu 11/27

10:00 am-8:55 am

1 stop15h 55m

Brussels Bruxelles-National

Thu 12/4

10:10 am-5:03 pm

1 stop13h 53m

$555

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 12/15

3:19 pm-1:15 pm

2 stops14h 56m

Brussels Bruxelles-National

Thu 12/25

10:00 am-5:54 pm

2 stops38h 54m

$625

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 11/24

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

Mon 12/1

9:10 pm-3:29 pm

2 stops49h 19m

$665

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 11/12

3:50 pm-10:10 am

1 stop11h 20m

Brussels Bruxelles-National

Thu 11/27

7:30 pm-1:55 pm

1 stop25h 25m

$693

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 1/2

10:01 am-10:30 am

2 stops41h 29m

Brussels Bruxelles-National

Mon 1/12

3:00 pm-10:59 pm

2 stops38h 59m

$766

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sat 1/3

9:47 am-2:30 pm

2 stops21h 43m

Brussels Bruxelles-National

Fri 1/9

10:20 am-8:39 pm

2 stops17h 19m

$1,005

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sat 1/3

12:55 pm-2:30 pm

2 stops18h 35m

Brussels Bruxelles-National

Thu 1/8

3:10 pm-8:39 pm

2 stops36h 29m

$1,039

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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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 $690. If you are unable to visit Brussels during the month of February, then departing from St. Louis during the month November is also very affordable. Most momondo users find prices during this month for around $705.

What is the cheapest day to depart on your flight to Brussels?

On average, the least expensive day to fly to Brussels from St. Louis is on a Friday. momondo users have found tickets for Friday departures for as low as $1,035. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Monday is the most expensive day to depart from St. Louis because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,431.

What is the cheapest time of day to depart on your flight to Brussels?

According to our data, the cheapest time of day to fly to Brussels is in the afternoon. momondo users have found flights departing from St. Louis to Brussels in the afternoon for as low as $1,088. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights at noon are often more expensive with an average ticket price of $1,420.

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

Direct flights

None
There are no direct flights from St. Louis to Brussels. There are no popular flight routes from St. Louis to Brussels.
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  • 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 41m.

  • 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
United AirlinesPriceFrom $654Free CancellationRating
7.4
8,976 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