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Cheap flights from St. Louis to Brussels from $583

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Brussels departing on 11/12. 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

United Airlines Logo
8:25 am - 7:15 amSTL-BRU
15h 50m1 stop
United Airlines Logo
10:00 am - 5:39 pmBRU-STL
38h 39m2 stops
$583United Airlines
Find Deal
Wed, Nov 12 - Thu, Nov 27
United Airlines Logo
3:14 pm - 8:55 amSTL-BRU
10h 41m1 stop
United Airlines Logo
10:10 am - 5:39 pmBRU-STL
14h 29m1 stop
$606United Airlines
Find Deal
Wed, Nov 5 - Tue, Nov 11
Scandinavian Airlines Logo
1:30 pm - 3:20 pmSTL-BRU
18h 50m2 stops
Scandinavian Airlines Logo
10:20 am - 10:04 pmBRU-STL
17h 44m2 stops
$630Scandinavian Airlines
Find Deal
Wed, Oct 22 - Tue, Oct 28
Logo
4:05 pm - 7:50 amSTL-BRU
56h 45m2 stops
Logo
7:55 pm - 11:44 pmBRU-STL
34h 49m2 stops
$631
Find Deal
Fri, Nov 14 - Mon, Nov 24
Logo
6:43 pm - 7:50 amSTL-BRU
31h 07m2 stops
Logo
5:30 pm - 1:55 pmBRU-STL
27h 25m1 stop
$678
Find Deal
Sat, Nov 1 - Sat, Nov 8
Air Canada Logo
9:15 am - 8:05 amSTL-BRU
15h 50m2 stops
Air Canada Logo
10:00 am - 2:19 pmBRU-STL
35h 19m2 stops
$680Air Canada
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Mon, Sep 1 - Tue, Sep 16
Scandinavian Airlines Logo
3:36 pm - 7:50 pmSTL-BRU
21h 14m2 stops
Scandinavian Airlines Logo
4:00 pm - 9:28 pmBRU-STL
36h 28m2 stops
$685Scandinavian Airlines
Find Deal
Wed, Sep 24 - Wed, Oct 8
Air Canada Logo
1:30 pm - 8:05 amSTL-BRU
11h 35m1 stop
Air Canada Logo
10:00 am - 7:38 pmBRU-STL
16h 38m2 stops
$693Air Canada
Find Deal
Mon, Sep 1 - Wed, Sep 17
Delta Logo
7:00 am - 8:40 amSTL-BRU
18h 40m1 stop
Delta Logo
10:45 am - 9:15 pmBRU-STL
17h 30m1 stop
$701Delta
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Tue, Sep 2 - Fri, Sep 12
Delta Logo
10:20 am - 8:40 amSTL-BRU
15h 20m1 stop
Delta Logo
10:45 am - 9:15 pmBRU-STL
17h 30m1 stop
$761Delta
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Tue, Sep 2 - Sun, Sep 14

Lufthansa flights from St. Louis to Brussels

Our best Lufthansa deals on St. Louis to Brussels flight tickets
Lufthansa
Nov 12
STL11:49 amLambert-St Louis
13h 16m
1 stop
BRU8:05 amBrussels Bruxelles-National
Nov 27
BRU7:30 pmBrussels Bruxelles-National
25h 25m
1 stop
STL1:55 pmLambert-St Louis
$719
Find similar
Lufthansa
Nov 12
STL11:05 amLambert-St Louis
14h 50m
1 stop
BRU8:55 amBrussels Bruxelles-National
Nov 27
BRU7:30 pmBrussels Bruxelles-National
25h 25m
1 stop
STL1:55 pmLambert-St Louis
$724
Find similar
Lufthansa
Nov 1
STL6:43 pmLambert-St Louis
32h 12m
1 stop
BRU8:55 amBrussels Bruxelles-National
Nov 8
BRU5:30 pmBrussels Bruxelles-National
27h 25m
1 stop
STL1:55 pmLambert-St Louis
$778
Find similar

United Airlines flights from St. Louis to Brussels

Our best United Airlines deals on St. Louis to Brussels flight tickets
United Airlines
Nov 12
STL8:25 amLambert-St Louis
15h 50m
1 stop
BRU7:15 amBrussels Bruxelles-National
Nov 27
BRU10:00 amBrussels Bruxelles-National
38h 39m
2 stops
STL5:39 pmLambert-St Louis
$583
Find similar
United Airlines
Nov 5
STL3:14 pmLambert-St Louis
10h 41m
1 stop
BRU8:55 amBrussels Bruxelles-National
Nov 11
BRU10:10 amBrussels Bruxelles-National
14h 29m
1 stop
STL5:39 pmLambert-St Louis
$606
Find similar
United Airlines
Nov 6
STL12:31 pmLambert-St Louis
13h 24m
1 stop
BRU8:55 amBrussels Bruxelles-National
Nov 12
BRU10:00 amBrussels Bruxelles-National
35h 25m
2 stops
STL2:25 pmLambert-St Louis
$633
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 August 20, 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

8:25 am-7:15 am

1 stop15h 50m

Brussels Bruxelles-National

Thu 11/27

10:00 am-5:39 pm

2 stops38h 39m

$583

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 11/5

3:14 pm-8:55 am

1 stop10h 41m

Brussels Bruxelles-National

Tue 11/11

10:10 am-5:39 pm

1 stop14h 29m

$606

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 10/22

1:30 pm-3:20 pm

2 stops18h 50m

Brussels Bruxelles-National

Tue 10/28

10:20 am-10:04 pm

2 stops17h 44m

$630

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 11/14

4:05 pm-7:50 am

2 stops56h 45m

Brussels Bruxelles-National

Mon 11/24

7:55 pm-11:44 pm

2 stops34h 49m

$631

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sat 11/1

6:43 pm-7:50 am

2 stops31h 07m

Brussels Bruxelles-National

Sat 11/8

5:30 pm-1:55 pm

1 stop27h 25m

$678

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 9/1

9:15 am-8:05 am

2 stops15h 50m

Brussels Bruxelles-National

Tue 9/16

10:00 am-2:19 pm

2 stops35h 19m

$680

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 9/24

3:36 pm-7:50 pm

2 stops21h 14m

Brussels Bruxelles-National

Wed 10/8

4:00 pm-9:28 pm

2 stops36h 28m

$685

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 9/1

1:30 pm-8:05 am

1 stop11h 35m

Brussels Bruxelles-National

Wed 9/17

10:00 am-7:38 pm

2 stops16h 38m

$693

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 9/2

7:00 am-8:40 am

1 stop18h 40m

Brussels Bruxelles-National

Fri 9/12

10:45 am-9:15 pm

1 stop17h 30m

$701

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 9/2

10:20 am-8:40 am

1 stop15h 20m

Brussels Bruxelles-National

Sun 9/14

10:45 am-9:15 pm

1 stop17h 30m

$761

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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, 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 March is also very affordable. Most momondo users find prices during this month for around $731.

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 $653Free CancellationRating
7.4
8,928 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