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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 1/29. 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
9:57 am - 1:15 pmSTL-BRU
20h 18m2 stops
United Airlines Logo
10:00 am - 10:52 amBRU-STL
31h 52m2 stops
$480United Airlines
Find Deal
jeu., janv. 29 - mar., févr. 3
Air Canada Logo
4:05 pm - 1:15 pmSTL-BRU
14h 10m2 stops
Air Canada Logo
10:00 am - 12:29 pmBRU-STL
33h 29m2 stops
$482Air Canada
Find Deal
jeu., janv. 29 - mar., févr. 3
Air Canada Logo
4:05 pm - 1:15 pmSTL-BRU
14h 10m2 stops
Air Canada Logo
10:00 am - 3:29 pmBRU-STL
36h 29m2 stops
$502Air Canada
Find Deal
jeu., janv. 29 - mar., févr. 3
United Airlines Logo
4:05 pm - 1:15 pmSTL-BRU
14h 10m2 stops
United Airlines Logo
10:10 am - 4:03 pmBRU-STL
12h 53m1 stop
$505United Airlines
Find Deal
jeu., janv. 29 - mar., févr. 3
United Airlines Logo
8:30 am - 7:15 amSTL-BRU
15h 45m1 stop
United Airlines Logo
11:55 am - 7:27 pmBRU-STL
14h 32m1 stop
$507United Airlines
Find Deal
jeu., janv. 29 - mar., févr. 3
United Airlines Logo
4:05 pm - 1:15 pmSTL-BRU
14h 10m2 stops
United Airlines Logo
10:00 am - 7:22 pmBRU-STL
40h 22m2 stops
$602United Airlines
Find Deal
lun., déc. 15 - jeu., déc. 25
United Airlines Logo
4:05 pm - 1:15 pmSTL-BRU
14h 10m2 stops
United Airlines Logo
10:10 am - 9:43 pmBRU-STL
18h 33m1 stop
$625United Airlines
Find Deal
lun., déc. 15 - jeu., déc. 25
United Airlines Logo
3:19 pm - 1:15 pmSTL-BRU
14h 56m2 stops
United Airlines Logo
10:10 am - 9:43 pmBRU-STL
18h 33m1 stop
$723United Airlines
Find Deal
lun., déc. 15 - jeu., déc. 25
United Airlines Logo
3:19 pm - 1:15 pmSTL-BRU
14h 56m2 stops
United Airlines Logo
11:55 am - 2:26 pmBRU-STL
33h 31m2 stops
$728United Airlines
Find Deal
lun., déc. 15 - jeu., déc. 25
United Airlines Logo
3:19 pm - 1:15 pmSTL-BRU
14h 56m2 stops
United Airlines Logo
10:30 am - 7:18 pmBRU-STL
15h 48m2 stops
$729United Airlines
Find Deal
lun., déc. 15 - jeu., déc. 25

United Airlines flights from St. Louis to Brussels

Our best United Airlines deals on St. Louis to Brussels flight tickets
United Airlines
Jan 29
STL9:57 amLambert-St Louis
20h 18m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Feb 3
BRU10:00 amBrussels Bruxelles-National
31h 52m
2 stops
STL10:52 amLambert-St Louis
$480
Find similar
United Airlines
Jan 29
STL4:05 pmLambert-St Louis
14h 10m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Feb 3
BRU10:10 amBrussels Bruxelles-National
12h 53m
1 stop
STL4:03 pmLambert-St Louis
$505
Find similar
United Airlines
Jan 29
STL8:30 amLambert-St Louis
15h 45m
1 stop
BRU7:15 amBrussels Bruxelles-National
Feb 3
BRU11:55 amBrussels Bruxelles-National
14h 32m
1 stop
STL7:27 pmLambert-St Louis
$507
Find similar

Air Canada flights from St. Louis to Brussels

Our best Air Canada deals on St. Louis to Brussels flight tickets
Air Canada
Jan 29
STL4:05 pmLambert-St Louis
14h 10m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Feb 3
BRU10:00 amBrussels Bruxelles-National
33h 29m
2 stops
STL12:29 pmLambert-St Louis
$482
Find similar
Air Canada
Jan 29
STL4:05 pmLambert-St Louis
14h 10m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Feb 3
BRU10:00 amBrussels Bruxelles-National
36h 29m
2 stops
STL3:29 pmLambert-St Louis
$502
Find similar
Air Canada
Mar 10
STL4:05 pmLambert-St Louis
34h 50m
2 stops
BRU8:55 amBrussels Bruxelles-National
Mar 17
BRU10:00 amBrussels Bruxelles-National
42h 49m
2 stops
STL10:49 pmLambert-St Louis
$741
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 novembre 13, 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

jeu. 1/29

9:57 am-1:15 pm

2 stops20h 18m

Brussels Bruxelles-National

mar. 2/3

10:00 am-10:52 am

2 stops31h 52m

$480

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

jeu. 1/29

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

mar. 2/3

10:00 am-12:29 pm

2 stops33h 29m

$482

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

jeu. 1/29

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

mar. 2/3

10:00 am-3:29 pm

2 stops36h 29m

$502

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

jeu. 1/29

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

mar. 2/3

10:10 am-4:03 pm

1 stop12h 53m

$505

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

jeu. 1/29

8:30 am-7:15 am

1 stop15h 45m

Brussels Bruxelles-National

mar. 2/3

11:55 am-7:27 pm

1 stop14h 32m

$507

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

lun. 12/15

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

jeu. 12/25

10:00 am-7:22 pm

2 stops40h 22m

$602

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

lun. 12/15

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

jeu. 12/25

10:10 am-9:43 pm

1 stop18h 33m

$625

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

lun. 12/15

3:19 pm-1:15 pm

2 stops14h 56m

Brussels Bruxelles-National

jeu. 12/25

10:10 am-9:43 pm

1 stop18h 33m

$723

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

lun. 12/15

3:19 pm-1:15 pm

2 stops14h 56m

Brussels Bruxelles-National

jeu. 12/25

11:55 am-2:26 pm

2 stops33h 31m

$728

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

lun. 12/15

3:19 pm-1:15 pm

2 stops14h 56m

Brussels Bruxelles-National

jeu. 12/25

10:30 am-7:18 pm

2 stops15h 48m

$729

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 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 cheapest month to fly to Brussels?

In general, November 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 $680. If you are unable to visit Brussels during the month of November, then departing from St. Louis during the month February is also very affordable. Most momondo users find prices during this month for around $690.

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 42m.

  • 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
9,017 reviews
Search United Airlines flights
LufthansaPriceFrom $829Free CancellationRating
6.8
7,572 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