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Cheap flights from St. Louis to Brussels from $480

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 12/5. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
12:55 pm - 1:15 pmSTL-BRU
17h 20m2 stops
United Airlines Logo
10:00 am - 3:40 pmBRU-STL
36h 40m2 stops
$480United Airlines
Find Deal
Fri, Dec 5 - Fri, Dec 12
United Airlines Logo
3:19 pm - 1:15 pmSTL-BRU
14h 56m2 stops
United Airlines Logo
10:10 am - 3:40 pmBRU-STL
12h 30m1 stop
$503United Airlines
Find Deal
Fri, Dec 5 - Fri, Dec 12
Delta Logo
7:30 am - 8:40 amSTL-BRU
18h 10m1 stop
Delta Logo
8:00 am - 11:40 pmBRU-STL
22h 40m2 stops
$576Delta
Find Deal
Wed, Apr 1 - Wed, Apr 8
Air Canada Logo
4:05 pm - 1:15 pmSTL-BRU
14h 10m2 stops
Air Canada Logo
10:00 am - 2:18 pmBRU-STL
35h 18m2 stops
$581Air Canada
Find Deal
Wed, Apr 1 - Wed, Apr 8
Lufthansa Logo
3:30 pm - 10:10 amSTL-BRU
11h 40m1 stop
Lufthansa Logo
8:30 am - 1:30 pmBRU-STL
12h 00m1 stop
$600Lufthansa
Find Deal
Wed, Apr 1 - Wed, Apr 8
KLM Logo
1:00 pm - 8:40 amSTL-BRU
12h 40m1 stop
KLM Logo
3:05 pm - 11:40 pmBRU-STL
15h 35m2 stops
$615KLM
Find Deal
Wed, Apr 1 - Wed, Apr 8
Air Canada Logo
4:05 pm - 1:15 pmSTL-BRU
15h 10m2 stops
Air Canada Logo
9:40 am - 3:24 pmBRU-STL
12h 44m1 stop
$651Air Canada
Find Deal
Fri, Mar 27 - Tue, Mar 31
Delta Logo
11:51 am - 8:00 amSTL-BRU
14h 09m1 stop
Delta Logo
10:45 am - 11:40 pmBRU-STL
19h 55m1 stop
$656Delta
Find Deal
Fri, Mar 27 - Tue, Mar 31
KLM Logo
4:32 pm - 2:15 pmSTL-BRU
14h 43m2 stops
KLM Logo
10:45 am - 8:41 pmBRU-STL
16h 56m2 stops
$709KLM
Find Deal
Mon, Dec 15 - Thu, Dec 25
Lufthansa Logo
3:30 pm - 10:10 amSTL-BRU
11h 40m1 stop
Lufthansa Logo
8:30 am - 1:30 pmBRU-STL
12h 00m1 stop
$750Lufthansa
Find Deal
Wed, Apr 1 - Wed, Apr 8

Delta flights from St. Louis to Brussels

Our best Delta deals on St. Louis to Brussels flight tickets
Delta
Apr 1
STL7:30 amLambert-St Louis
18h 10m
1 stop
BRU8:40 amBrussels Bruxelles-National
Apr 8
BRU8:00 amBrussels Bruxelles-National
22h 40m
2 stops
STL11:40 pmLambert-St Louis
$576
Find similar
Delta
Mar 27
STL11:51 amLambert-St Louis
14h 09m
1 stop
BRU8:00 amBrussels Bruxelles-National
Mar 31
BRU10:45 amBrussels Bruxelles-National
19h 55m
1 stop
STL11:40 pmLambert-St Louis
$656
Find similar
Delta
Mar 27
STL11:51 amLambert-St Louis
14h 09m
1 stop
BRU8:00 amBrussels Bruxelles-National
Mar 31
BRU3:05 pmBrussels Bruxelles-National
15h 35m
2 stops
STL11:40 pmLambert-St Louis
$665
Find similar

Air Canada flights from St. Louis to Brussels

Our best Air Canada deals on St. Louis to Brussels flight tickets
Air Canada
Apr 1
STL4:05 pmLambert-St Louis
14h 10m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Apr 8
BRU10:00 amBrussels Bruxelles-National
35h 18m
2 stops
STL2:18 pmLambert-St Louis
$581
Find similar
Air Canada
Mar 27
STL4:05 pmLambert-St Louis
15h 10m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Mar 31
BRU9:40 amBrussels Bruxelles-National
12h 44m
1 stop
STL3:24 pmLambert-St Louis
$651
Find similar
Air Canada
Mar 27
STL4:05 pmLambert-St Louis
15h 10m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Mar 31
BRU10:00 amBrussels Bruxelles-National
33h 20m
2 stops
STL12:20 pmLambert-St Louis
$660
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 November 6, 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

Fri 12/5

12:55 pm-1:15 pm

2 stops17h 20m

Brussels Bruxelles-National

Fri 12/12

10:00 am-3:40 pm

2 stops36h 40m

$480

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 12/5

3:19 pm-1:15 pm

2 stops14h 56m

Brussels Bruxelles-National

Fri 12/12

10:10 am-3:40 pm

1 stop12h 30m

$503

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 4/1

7:30 am-8:40 am

1 stop18h 10m

Brussels Bruxelles-National

Wed 4/8

8:00 am-11:40 pm

2 stops22h 40m

$576

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 4/1

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

Wed 4/8

10:00 am-2:18 pm

2 stops35h 18m

$581

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 4/1

3:30 pm-10:10 am

1 stop11h 40m

Brussels Bruxelles-National

Wed 4/8

8:30 am-1:30 pm

1 stop12h 00m

$600

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 4/1

1:00 pm-8:40 am

1 stop12h 40m

Brussels Bruxelles-National

Wed 4/8

3:05 pm-11:40 pm

2 stops15h 35m

$615

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 3/27

4:05 pm-1:15 pm

2 stops15h 10m

Brussels Bruxelles-National

Tue 3/31

9:40 am-3:24 pm

1 stop12h 44m

$651

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 3/27

11:51 am-8:00 am

1 stop14h 09m

Brussels Bruxelles-National

Tue 3/31

10:45 am-11:40 pm

1 stop19h 55m

$656

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 12/15

4:32 pm-2:15 pm

2 stops14h 43m

Brussels Bruxelles-National

Thu 12/25

10:45 am-8:41 pm

2 stops16h 56m

$709

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 4/1

3:30 pm-10:10 am

1 stop11h 40m

Brussels Bruxelles-National

Wed 4/8

8:30 am-1:30 pm

1 stop12h 00m

$750

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 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.
Search flight deals

  • 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 36m.

  • 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
9,007 reviews
Search United Airlines flights
LufthansaPriceFrom $829Free CancellationRating
6.8
7,558 reviews
Search Lufthansa 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