Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Brussels from $433

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 8/3. 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.
American Airlines Logo
1:00 pm - 1:35 pm
STL
-
BRU
18h 35m
2 stops
American Airlines Logo
7:00 am - 7:27 pm
BRU
-
STL
19h 27m
2 stops
$813American Airlines
Tue, Oct 27 - Tue, Nov 3
Scandinavian Airlines Logo
1:30 pm - 8:50 pm
STL
-
BRU
24h 20m
2 stops
Scandinavian Airlines Logo
10:20 am - 11:39 pm
BRU
-
STL
20h 19m
2 stops
$824Scandinavian Airlines
Sat, Oct 24 - Wed, Nov 4
Air Canada Logo
4:15 pm - 8:00 pm
STL
-
BRU
21h 45m
2 stops
Air Canada Logo
10:00 am - 3:38 pm
BRU
-
STL
36h 38m
2 stops
$842Air Canada
Mon, Oct 26 - Tue, Nov 3
Air Canada Logo
6:49 pm - 8:50 am
STL
-
BRU
31h 01m
2 stops
Air Canada Logo
10:00 am - 3:38 pm
BRU
-
STL
36h 38m
2 stops
$845Air Canada
Sat, Oct 24 - Fri, Nov 6
Air Canada Logo
4:15 pm - 7:50 am
STL
-
BRU
33h 35m
2 stops
Air Canada Logo
10:00 am - 3:38 pm
BRU
-
STL
36h 38m
2 stops
$848Air Canada
Sun, Oct 25 - Fri, Nov 6
United Airlines Logo
6:40 am - 8:55 am
STL
-
BRU
20h 15m
1 stop
United Airlines Logo
7:00 am - 1:55 pm
BRU
-
STL
13h 55m
1 stop
$852United Airlines
Fri, Oct 30 - Wed, Nov 4
United Airlines Logo
4:15 pm - 1:15 pm
STL
-
BRU
15h 00m
2 stops
United Airlines Logo
7:00 am - 1:55 pm
BRU
-
STL
13h 55m
1 stop
$853United Airlines
Fri, Oct 30 - Wed, Nov 4
Scandinavian Airlines Logo
3:42 pm - 9:40 am
STL
-
BRU
35h 58m
2 stops
Scandinavian Airlines Logo
8:30 pm - 11:39 pm
BRU
-
STL
34h 09m
2 stops
$854Scandinavian Airlines
Fri, Oct 30 - Tue, Nov 3
United Airlines Logo
5:20 pm - 1:15 pm
STL
-
BRU
13h 55m
2 stops
United Airlines Logo
7:00 am - 1:55 pm
BRU
-
STL
13h 55m
1 stop
$855United Airlines
Sun, Oct 25 - Fri, Nov 6
United Airlines Logo
4:15 pm - 1:15 pm
STL
-
BRU
15h 00m
2 stops
United Airlines Logo
10:10 am - 9:09 pm
BRU
-
STL
17h 59m
1 stop
$856United Airlines
Fri, Oct 30 - Thu, Nov 5

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

Our best Lufthansa deals on St. Louis to Brussels Bruxelles-National Airport flight tickets
Lufthansa
Sep 30
STL3:30 pmLambert-St Louis
13h 20m
1 stop
BRU11:50 amBrussels Bruxelles-National
Oct 5
BRU7:30 pmBrussels Bruxelles-National
24h 55m
2 stops
STL1:25 pmLambert-St Louis
$948
Lufthansa
Sep 30
STL1:29 pmLambert-St Louis
26h 06m
2 stops
BRU10:35 pmBrussels Bruxelles-National
Oct 5
BRU5:30 pmBrussels Bruxelles-National
26h 55m
1 stop
STL1:25 pmLambert-St Louis
$967
Lufthansa
May 19
STL8:45 amLambert-St Louis
15h 30m
1 stop
BRU7:15 amBrussels Bruxelles-National
May 25
BRU9:55 amBrussels Bruxelles-National
17h 30m
1 stop
STL8:25 pmLambert-St Louis
$2,258

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
Oct 26
STL4:15 pmLambert-St Louis
21h 45m
2 stops
BRU8:00 pmBrussels Bruxelles-National
Nov 3
BRU10:00 amBrussels Bruxelles-National
36h 38m
2 stops
STL3:38 pmLambert-St Louis
$842
Air Canada
Oct 24
STL6:49 pmLambert-St Louis
31h 01m
2 stops
BRU8:50 amBrussels Bruxelles-National
Nov 6
BRU10:00 amBrussels Bruxelles-National
36h 38m
2 stops
STL3:38 pmLambert-St Louis
$845
Air Canada
Oct 25
STL4:15 pmLambert-St Louis
33h 35m
2 stops
BRU7:50 amBrussels Bruxelles-National
Nov 6
BRU10:00 amBrussels Bruxelles-National
36h 38m
2 stops
STL3:38 pmLambert-St Louis
$848

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 May 16, 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

Tue 10/27

1:00 pm-1:35 pm

2 stops18h 35m

Brussels Bruxelles-National

Tue 11/3

7:00 am-7:27 pm

2 stops19h 27m

$813

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sat 10/24

1:30 pm-8:50 pm

2 stops24h 20m

Brussels Bruxelles-National

Wed 11/4

10:20 am-11:39 pm

2 stops20h 19m

$824

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 10/26

4:15 pm-8:00 pm

2 stops21h 45m

Brussels Bruxelles-National

Tue 11/3

10:00 am-3:38 pm

2 stops36h 38m

$842

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sat 10/24

6:49 pm-8:50 am

2 stops31h 01m

Brussels Bruxelles-National

Fri 11/6

10:00 am-3:38 pm

2 stops36h 38m

$845

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 10/25

4:15 pm-7:50 am

2 stops33h 35m

Brussels Bruxelles-National

Fri 11/6

10:00 am-3:38 pm

2 stops36h 38m

$848

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 10/30

6:40 am-8:55 am

1 stop20h 15m

Brussels Bruxelles-National

Wed 11/4

7:00 am-1:55 pm

1 stop13h 55m

$852

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 10/30

4:15 pm-1:15 pm

2 stops15h 00m

Brussels Bruxelles-National

Wed 11/4

7:00 am-1:55 pm

1 stop13h 55m

$853

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 10/30

3:42 pm-9:40 am

2 stops35h 58m

Brussels Bruxelles-National

Tue 11/3

8:30 pm-11:39 pm

2 stops34h 09m

$854
Quickest round-trip

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sun 10/25

5:20 pm-1:15 pm

2 stops13h 55m

Brussels Bruxelles-National

Fri 11/6

7:00 am-1:55 pm

1 stop13h 55m

$855

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 10/30

4:15 pm-1:15 pm

2 stops15h 00m

Brussels Bruxelles-National

Thu 11/5

10:10 am-9:09 pm

1 stop17h 59m

$856

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 January instead. Flights to Brussels Bruxelles-National Airport in January, while not as cheap as those in February, still average around $657.

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

You could potentially save up to 27% 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 58m

Direct flights

None
The fastest flight from St. Louis to Brussels Bruxelles-National Airport takes 13h 58m
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

Frequently asked questions about flying from St. Louis to Brussels Bruxelles-National Airport

  • 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 58m, 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
8,004 reviews
Search Lufthansa flights
United AirlinesPriceFrom $574Free CancellationRating
7.4
9,727 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
Zaventem
Mons
Hasselt
Durbuy
Genk
Dinant
Namur
Waterloo
Aalst
Mechelen
Knokke-Heist
Spa
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.

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
Mon 6/15
Mon 6/22
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 $528