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Cheap flights from St. Louis to Brussels from $357

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 9/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
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.
Finnair Logo
5:21 pm - 6:20 pm
STL
-
BRU
17h 59m
2 stops
Finnair Logo
11:20 am - 10:19 pm
BRU
-
STL
17h 59m
2 stops
$766Finnair
ر, مايو 6 - ر, مايو 13
Finnair Logo
5:21 pm - 10:35 pm
STL
-
BRU
22h 14m
2 stops
Finnair Logo
11:20 am - 10:19 pm
BRU
-
STL
17h 59m
2 stops
$770Finnair
ر, مايو 6 - ر, مايو 13
Multiple Airlines Logo
7:05 am - 6:20 pm
STL
-
BRU
28h 15m
2 stops
Multiple Airlines Logo
11:20 am - 11:56 pm
BRU
-
STL
19h 36m
2 stops
$771Multiple Airlines
ر, مايو 6 - ر, مايو 13
Multiple Airlines Logo
12:27 pm - 6:20 pm
STL
-
BRU
22h 53m
2 stops
Multiple Airlines Logo
6:30 am - 10:19 pm
BRU
-
STL
22h 49m
2 stops
$826Multiple Airlines
خ, مايو 7 - خ, مايو 14
Multiple Airlines Logo
12:43 pm - 6:20 pm
STL
-
BRU
22h 37m
2 stops
Multiple Airlines Logo
11:35 am - 11:59 pm
BRU
-
STL
19h 24m
2 stops
$840Multiple Airlines
ر, أغسطس 26 - س, ديسمبر 5
Air Canada Logo
1:05 pm - 1:15 pm
STL
-
BRU
17h 10m
2 stops
Air Canada Logo
9:55 am - 8:25 pm
BRU
-
STL
17h 30m
1 stop
$849Air Canada
ر, مايو 13 - خ, مايو 21
Air Canada Logo
1:05 pm - 7:10 am
STL
-
BRU
11h 05m
1 stop
Air Canada Logo
9:55 am - 8:25 pm
BRU
-
STL
17h 30m
1 stop
$853Air Canada
ر, مايو 13 - خ, مايو 21
Air Canada Logo
1:05 pm - 8:55 am
STL
-
BRU
36h 50m
2 stops
Air Canada Logo
9:55 am - 12:11 pm
BRU
-
STL
33h 16m
2 stops
$855Air Canada
ر, مايو 13 - خ, مايو 21
Multiple Airlines Logo
9:35 pm - 8:25 pm
STL
-
BRU
15h 50m
1 stop
Multiple Airlines Logo
11:20 am - 10:19 pm
BRU
-
STL
17h 59m
2 stops
$871Multiple Airlines
ر, مايو 6 - ر, مايو 13
Multiple Airlines Logo
9:35 pm - 8:25 pm
STL
-
BRU
15h 50m
1 stop
Multiple Airlines Logo
6:30 am - 10:19 pm
BRU
-
STL
22h 49m
2 stops
$872Multiple Airlines
ر, مايو 6 - ر, مايو 13

Finnair flights from St. Louis to Brussels Bruxelles-National Airport

Our best Finnair deals on St. Louis to Brussels Bruxelles-National Airport flight tickets
Finnair
May 6
STL5:21 pmLambert-St Louis
17h 59m
2 stops
BRU6:20 pmBrussels Bruxelles-National
May 13
BRU11:20 amBrussels Bruxelles-National
17h 59m
2 stops
STL10:19 pmLambert-St Louis
$766
Finnair
May 6
STL5:21 pmLambert-St Louis
22h 14m
2 stops
BRU10:35 pmBrussels Bruxelles-National
May 13
BRU11:20 amBrussels Bruxelles-National
17h 59m
2 stops
STL10:19 pmLambert-St Louis
$770
Finnair
May 2
STL5:21 pmLambert-St Louis
17h 59m
2 stops
BRU6:20 pmBrussels Bruxelles-National
May 9
BRU7:45 pmBrussels Bruxelles-National
33h 34m
2 stops
STL10:19 pmLambert-St Louis
$885

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
Apr 6
STL9:37 amLambert-St Louis
17h 03m
2 stops
BRU9:40 amBrussels Bruxelles-National
Apr 13
BRU9:25 pmBrussels Bruxelles-National
31h 52m
2 stops
STL10:17 pmLambert-St Louis
$947
Aer Lingus
Mar 31
STL12:05 pmLambert-St Louis
14h 35m
2 stops
BRU9:40 amBrussels Bruxelles-National
Apr 10
BRU10:20 amBrussels Bruxelles-National
18h 57m
2 stops
STL10:17 pmLambert-St Louis
$1,037
Aer Lingus
Apr 1
STL12:05 pmLambert-St Louis
14h 35m
2 stops
BRU9:40 amBrussels Bruxelles-National
Apr 8
BRU10:20 amBrussels Bruxelles-National
18h 57m
2 stops
STL10:17 pmLambert-St Louis
$1,038

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 مارس 26, 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

Cheapest round-trip

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

ر 5/6

5:21 pm-6:20 pm

2 stops17h 59m

Brussels Bruxelles-National

ر 5/13

11:20 am-10:19 pm

2 stops17h 59m

$766

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

ر 5/6

5:21 pm-10:35 pm

2 stops22h 14m

Brussels Bruxelles-National

ر 5/13

11:20 am-10:19 pm

2 stops17h 59m

$770

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

ر 5/6

7:05 am-6:20 pm

2 stops28h 15m

Brussels Bruxelles-National

ر 5/13

11:20 am-11:56 pm

2 stops19h 36m

$771

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

خ 5/7

12:27 pm-6:20 pm

2 stops22h 53m

Brussels Bruxelles-National

خ 5/14

6:30 am-10:19 pm

2 stops22h 49m

$826

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

ر 8/26

12:43 pm-6:20 pm

2 stops22h 37m

Brussels Bruxelles-National

س 12/5

11:35 am-11:59 pm

2 stops19h 24m

$840

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

ر 5/13

1:05 pm-1:15 pm

2 stops17h 10m

Brussels Bruxelles-National

خ 5/21

9:55 am-8:25 pm

1 stop17h 30m

$849
Quickest round-trip

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

ر 5/13

1:05 pm-7:10 am

1 stop11h 05m

Brussels Bruxelles-National

خ 5/21

9:55 am-8:25 pm

1 stop17h 30m

$853

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

ر 5/13

1:05 pm-8:55 am

2 stops36h 50m

Brussels Bruxelles-National

خ 5/21

9:55 am-12:11 pm

2 stops33h 16m

$855

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

ر 5/6

9:35 pm-8:25 pm

1 stop15h 50m

Brussels Bruxelles-National

ر 5/13

11:20 am-10:19 pm

2 stops17h 59m

$871

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

ر 5/6

9:35 pm-8:25 pm

1 stop15h 50m

Brussels Bruxelles-National

ر 5/13

6:30 am-10:19 pm

2 stops22h 49m

$872

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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 typical price of a round-trip flight between St. Louis and Brussels Bruxelles-National Airport?

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 April instead. Flights to Brussels Bruxelles-National Airport in April, while not as cheap as those in February, still average around $606.

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

You could potentially save up to 5% 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

13h 49m

Direct flights

None
The fastest flight from St. Louis to Brussels Bruxelles-National Airport takes 13h 49m
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 13h 49m, 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
7,870 reviews
Search Lufthansa flights
United AirlinesPriceFrom $606Free CancellationRating
7.4
9,484 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
Genk
Namur
Dinant
Waterloo
Durbuy
Mons
Aalst
Spa
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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