Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Brussels from $455

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 2/4. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from St. Louis to Brussels

Cheap round-trip flights

Enter your travel dates to find the best prices.
Lufthansa Logo
12:44 pm - 7:15 am
STL
-
BRU
11h 31m1 stop
Lufthansa Logo
10:10 am - 5:43 pm
BRU
-
STL
14h 33m1 stop
$455Lufthansa
Wed, Feb 4 - Wed, Feb 11
Lufthansa Logo
11:22 am - 8:05 am
STL
-
BRU
13h 43m1 stop
Lufthansa Logo
10:10 am - 5:43 pm
BRU
-
STL
14h 33m1 stop
$465Lufthansa
Sun, Jan 18 - Sun, Jan 25
Lufthansa Logo
11:22 am - 10:10 am
STL
-
BRU
15h 48m2 stops
Lufthansa Logo
10:10 am - 5:43 pm
BRU
-
STL
14h 33m1 stop
$470Lufthansa
Sun, Jan 18 - Sun, Jan 25
United Airlines Logo
11:20 am - 1:15 pm
STL
-
BRU
18h 55m2 stops
United Airlines Logo
10:00 am - 2:30 pm
BRU
-
STL
35h 30m2 stops
$485United Airlines
Thu, Jan 29 - Tue, Feb 3
Air Canada Logo
4:05 pm - 1:15 pm
STL
-
BRU
14h 10m2 stops
Air Canada Logo
10:00 am - 2:30 pm
BRU
-
STL
35h 30m2 stops
$487Air Canada
Fri, Jan 30 - Tue, Feb 3
United Airlines Logo
8:30 am - 7:15 am
STL
-
BRU
15h 45m1 stop
United Airlines Logo
10:00 am - 2:30 pm
BRU
-
STL
35h 30m2 stops
$488United Airlines
Thu, Jan 29 - Tue, Feb 3
Lufthansa Logo
11:22 am - 8:05 am
STL
-
BRU
13h 43m1 stop
Lufthansa Logo
10:30 am - 10:58 pm
BRU
-
STL
19h 28m2 stops
$493Lufthansa
Sun, Feb 1 - Mon, Feb 9
Multiple Airlines Logo
4:05 pm - 8:55 am
STL
-
BRU
33h 50m2 stops
Multiple Airlines Logo
11:15 am - 11:59 pm
BRU
-
STL
19h 44m1 stop
$502Multiple Airlines
Wed, Feb 4 - Wed, Feb 11
United Airlines Logo
9:57 am - 1:15 pm
STL
-
BRU
20h 18m2 stops
United Airlines Logo
11:15 am - 5:18 pm
BRU
-
STL
13h 03m1 stop
$504United Airlines
Thu, Jan 29 - Tue, Feb 3
Air Canada Logo
4:05 pm - 1:15 pm
STL
-
BRU
14h 10m2 stops
Air Canada Logo
10:00 am - 10:58 pm
BRU
-
STL
19h 58m2 stops
$505Air Canada
Sun, Jan 18 - Sun, Jan 25

Air Canada flights from St. Louis to Brussels Bruxelles-National Airport

Our best Air Canada deals on St. Louis to Brussels Bruxelles-National Airport flight tickets
Air Canada
Jan 30
STL4:05 pmLambert-St Louis
14h 10m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Feb 3
BRU10:00 amBrussels Bruxelles-National
35h 30m
2 stops
STL2:30 pmLambert-St Louis
$487
Find similar
Air Canada
Jan 18
STL4:05 pmLambert-St Louis
14h 10m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Jan 25
BRU10:00 amBrussels Bruxelles-National
19h 58m
2 stops
STL10:58 pmLambert-St Louis
$505
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 15m
2 stops
STL3:15 pmLambert-St Louis
$506
Find similar

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

Our best KLM deals on St. Louis to Brussels Bruxelles-National Airport flight tickets
KLM
Mar 28
STL5:00 pmLambert-St Louis
31h 40m
1 stop
BRU6:40 amBrussels Bruxelles-National
Apr 7
BRU9:45 amBrussels Bruxelles-National
21h 13m
1 stop
STL11:58 pmLambert-St Louis
$1,610
Find similar
KLM
Mar 28
STL5:00 pmLambert-St Louis
31h 40m
1 stop
BRU6:40 amBrussels Bruxelles-National
Apr 7
BRU3:10 pmBrussels Bruxelles-National
15h 48m
2 stops
STL11:58 pmLambert-St Louis
$1,641
Find similar

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 December 23, 2025.
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

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 2/4

12:44 pm-7:15 am

1 stop11h 31m

Brussels Bruxelles-National

Wed 2/11

10:10 am-5:43 pm

1 stop14h 33m

$455

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 1/18

11:22 am-8:05 am

1 stop13h 43m

Brussels Bruxelles-National

Sun 1/25

10:10 am-5:43 pm

1 stop14h 33m

$465

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 1/18

11:22 am-10:10 am

2 stops15h 48m

Brussels Bruxelles-National

Sun 1/25

10:10 am-5:43 pm

1 stop14h 33m

$470

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Thu 1/29

11:20 am-1:15 pm

2 stops18h 55m

Brussels Bruxelles-National

Tue 2/3

10:00 am-2:30 pm

2 stops35h 30m

$485

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 1/30

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

Tue 2/3

10:00 am-2:30 pm

2 stops35h 30m

$487

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Thu 1/29

8:30 am-7:15 am

1 stop15h 45m

Brussels Bruxelles-National

Tue 2/3

10:00 am-2:30 pm

2 stops35h 30m

$488

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 2/1

11:22 am-8:05 am

1 stop13h 43m

Brussels Bruxelles-National

Mon 2/9

10:30 am-10:58 pm

2 stops19h 28m

$493

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 2/4

4:05 pm-8:55 am

2 stops33h 50m

Brussels Bruxelles-National

Wed 2/11

11:15 am-11:59 pm

1 stop19h 44m

$502

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Thu 1/29

9:57 am-1:15 pm

2 stops20h 18m

Brussels Bruxelles-National

Tue 2/3

11:15 am-5:18 pm

1 stop13h 03m

$504

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 1/18

4:05 pm-1:15 pm

2 stops14h 10m

Brussels Bruxelles-National

Sun 1/25

10:00 am-10:58 pm

2 stops19h 58m

$505

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 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 $561, 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 March instead. Flights to Brussels Bruxelles-National Airport in March, while not as cheap as those in February, still average around $725.

What is the cheapest day to depart on your flight to Brussels Bruxelles-National Airport?

The cheapest day to depart from St. Louis to Brussels Bruxelles-National Airport is on a Friday. Travelers who choose to depart for Brussels Bruxelles-National Airport on a Friday will often find tickets for as low as $1,035. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from St. Louis to Brussels Bruxelles-National Airport for around $1,431.

What is the cheapest time of day to depart on your flight to Brussels Bruxelles-National Airport?

Our most recent data shows that the best time of day to fly to Brussels Bruxelles-National Airport is in the afternoon. Flights from St. Louis to Brussels Bruxelles-National Airport during this time can be as low as $1,088. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $1,420 on average. Flights to Brussels Bruxelles-National Airport from St. Louis at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

You could potentially save up to 24% 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

11h 31m

Direct flights

None
The fastest flight from St. Louis to Brussels Bruxelles-National Airport takes 11h 31m
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 11h 31m, 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
7,649 reviews
Search Lufthansa flights
United AirlinesPriceFrom $654Free CancellationRating
7.4
9,106 reviews
Search United Airlines flights

Traveling to a place near Brussels?

Book flights to Brussels if you plan to visit one of these locations
Bruges
Ghent
Leuven
Charleroi
Hasselt
Spa
Zaventem
Namur
Dinant
Genk
Mons
Durbuy
Waterloo
Aalst
Mechelen
Francorchamps
Knokke-Heist
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.

An easier way to manage your Brussels Bruxelles-National Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 1/22
Thu 1/29
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Brussels

Popular cities in Belgium

Popular flights according to clicks in the last 7 days on momondo
Flights to Charleroi Brussels Airportfrom $411