Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Brussels from $329

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 9/30. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Brussels

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
12:10 pm - 1:15 pmSTL  Lambert-St Louis-BRU Brussels Bruxelles-National
18h 05m2 stops Montreal Pierre Elliott Trudeau Intl London Heathrow
Air Canada Logo
9:10 am - 6:41 pmBRU  Brussels Bruxelles-National-STL Lambert-St Louis
16h 31m1 stop Montreal Pierre Elliott Trudeau Intl
$765Air Canada
Mon, Sep 21 - Tue, Sep 29
Air Canada Logo
12:10 pm - 7:10 amSTL  Lambert-St Louis-BRU Brussels Bruxelles-National
12h 00m1 stop Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
9:10 am - 6:41 pmBRU  Brussels Bruxelles-National-STL Lambert-St Louis
16h 31m1 stop Montreal Pierre Elliott Trudeau Intl
$771Air Canada
Mon, Sep 21 - Tue, Sep 29
Air Canada Logo
12:10 pm - 1:15 pmSTL  Lambert-St Louis-BRU Brussels Bruxelles-National
18h 05m2 stops Montreal Pierre Elliott Trudeau Intl London Heathrow
Air Canada Logo
9:10 am - 6:41 pmBRU  Brussels Bruxelles-National-STL Lambert-St Louis
16h 31m1 stop Montreal Pierre Elliott Trudeau Intl
$774Air Canada
Mon, Sep 21 - Tue, Sep 29
Air Canada Logo
12:10 pm - 7:10 amSTL  Lambert-St Louis-BRU Brussels Bruxelles-National
12h 00m1 stop Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
9:10 am - 6:41 pmBRU  Brussels Bruxelles-National-STL Lambert-St Louis
16h 31m1 stop Montreal Pierre Elliott Trudeau Intl
$775Air Canada
Mon, Sep 21 - Tue, Sep 29
Lufthansa Logo
1:29 pm - 11:50 amSTL  Lambert-St Louis-BRU Brussels Bruxelles-National
15h 21m2 stops Chicago O'Hare Intl Frankfurt am Main
Lufthansa Logo
7:30 pm - 1:25 pmBRU  Brussels Bruxelles-National-STL Lambert-St Louis
24h 55m1 stop Frankfurt am Main
$843Lufthansa
Wed, Sep 30 - Mon, Oct 5
Lufthansa Logo
1:29 pm - 11:50 amSTL  Lambert-St Louis-BRU Brussels Bruxelles-National
15h 21m2 stops Chicago O'Hare Intl Frankfurt am Main
Lufthansa Logo
7:30 pm - 1:25 pmBRU  Brussels Bruxelles-National-STL Lambert-St Louis
24h 55m1 stop Frankfurt am Main
$850Lufthansa
Wed, Sep 30 - Mon, Oct 5
United Airlines Logo
8:40 am - 7:15 amSTL  Lambert-St Louis-BRU Brussels Bruxelles-National
15h 35m1 stop Washington, D.C. Dulles Intl
United Airlines Logo
9:10 am - 11:16 amBRU  Brussels Bruxelles-National-STL Lambert-St Louis
33h 06m2 stops Montreal Pierre Elliott Trudeau Intl Newark
$896United Airlines
Tue, Sep 1 - Tue, Sep 8
United Airlines Logo
7:25 am - 9:00 amSTL  Lambert-St Louis-BRU Brussels Bruxelles-National
18h 35m1 stop Chicago O'Hare Intl
United Airlines Logo
9:10 am - 10:12 amBRU  Brussels Bruxelles-National-STL Lambert-St Louis
32h 02m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl
$896United Airlines
Wed, Sep 2 - Wed, Sep 9
United Airlines Logo
10:53 am - 7:45 amSTL  Lambert-St Louis-BRU Brussels Bruxelles-National
13h 52m2 stops Chicago O'Hare Intl Newark
United Airlines Logo
9:10 am - 10:12 amBRU  Brussels Bruxelles-National-STL Lambert-St Louis
32h 02m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl
$901United Airlines
Wed, Sep 2 - Wed, Sep 9
Lufthansa Logo
12:10 pm - 7:10 amSTL  Lambert-St Louis-BRU Brussels Bruxelles-National
12h 00m1 stop Montreal Pierre Elliott Trudeau Intl
Lufthansa Logo
6:20 am - 1:25 pmBRU  Brussels Bruxelles-National-STL Lambert-St Louis
14h 05m1 stop Frankfurt am Main
$1,531Lufthansa
Sat, Oct 10 - Fri, Oct 16

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

Air Canada flights from St. Louis to Brussels

Our best Air Canada deals on St. Louis to Brussels flight tickets
Air Canada
Sep 21
STL12:10 pmLambert-St Louis
18h 05m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Sep 29
BRU9:10 amBrussels Bruxelles-National
16h 31m
1 stop
STL6:41 pmLambert-St Louis
$765
Air Canada
Sep 21
STL12:10 pmLambert-St Louis
12h 00m
1 stop
BRU7:10 amBrussels Bruxelles-National
Sep 29
BRU9:10 amBrussels Bruxelles-National
16h 31m
1 stop
STL6:41 pmLambert-St Louis
$771
Air Canada
Sep 21
STL12:10 pmLambert-St Louis
18h 05m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Sep 29
BRU9:10 amBrussels Bruxelles-National
16h 31m
1 stop
STL6:41 pmLambert-St Louis
$774

Lufthansa flights from St. Louis to Brussels

Our best Lufthansa deals on St. Louis to Brussels flight tickets
Lufthansa
Sep 30
STL1:29 pmLambert-St Louis
15h 21m
2 stops
BRU11:50 amBrussels Bruxelles-National
Oct 5
BRU7:30 pmBrussels Bruxelles-National
24h 55m
1 stop
STL1:25 pmLambert-St Louis
$843
Lufthansa
Sep 30
STL1:29 pmLambert-St Louis
15h 21m
2 stops
BRU11:50 amBrussels Bruxelles-National
Oct 5
BRU7:30 pmBrussels Bruxelles-National
24h 55m
1 stop
STL1:25 pmLambert-St Louis
$850

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 August 8, 2026.
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

Cheapest round-trip

St. LouisBrussels

STL Lambert-St Louis - BRU Brussels Bruxelles-National

STLBRU

Lambert-St Louis

Mon 9/21

12:10 pm-1:15 pm

2 stops18h 05m

Brussels Bruxelles-National

Tue 9/29

9:10 am-6:41 pm

1 stop16h 31m

$765

St. LouisBrussels

STL Lambert-St Louis - BRU Brussels Bruxelles-National

STLBRU

Lambert-St Louis

Mon 9/21

12:10 pm-7:10 am

1 stop12h 00m

Brussels Bruxelles-National

Tue 9/29

9:10 am-6:41 pm

1 stop16h 31m

$771

St. LouisBrussels

STL Lambert-St Louis - BRU Brussels Bruxelles-National

STLBRU

Lambert-St Louis

Mon 9/21

12:10 pm-1:15 pm

2 stops18h 05m

Brussels Bruxelles-National

Tue 9/29

9:10 am-6:41 pm

1 stop16h 31m

$774

St. LouisBrussels

STL Lambert-St Louis - BRU Brussels Bruxelles-National

STLBRU

Lambert-St Louis

Mon 9/21

12:10 pm-7:10 am

1 stop12h 00m

Brussels Bruxelles-National

Tue 9/29

9:10 am-6:41 pm

1 stop16h 31m

$775

St. LouisBrussels

STL Lambert-St Louis - BRU Brussels Bruxelles-National

STLBRU

Lambert-St Louis

Wed 9/30

1:29 pm-11:50 am

2 stops15h 21m

Brussels Bruxelles-National

Mon 10/5

7:30 pm-1:25 pm

1 stop24h 55m

$843

St. LouisBrussels

STL Lambert-St Louis - BRU Brussels Bruxelles-National

STLBRU

Lambert-St Louis

Wed 9/30

1:29 pm-11:50 am

2 stops15h 21m

Brussels Bruxelles-National

Mon 10/5

7:30 pm-1:25 pm

1 stop24h 55m

$850

St. LouisBrussels

STL Lambert-St Louis - BRU Brussels Bruxelles-National

STLBRU

Lambert-St Louis

Tue 9/1

8:40 am-7:15 am

1 stop15h 35m

Brussels Bruxelles-National

Tue 9/8

9:10 am-11:16 am

2 stops33h 06m

$896

St. LouisBrussels

STL Lambert-St Louis - BRU Brussels Bruxelles-National

STLBRU

Lambert-St Louis

Wed 9/2

7:25 am-9:00 am

1 stop18h 35m

Brussels Bruxelles-National

Wed 9/9

9:10 am-10:12 am

2 stops32h 02m

$896

St. LouisBrussels

STL Lambert-St Louis - BRU Brussels Bruxelles-National

STLBRU

Lambert-St Louis

Wed 9/2

10:53 am-7:45 am

2 stops13h 52m

Brussels Bruxelles-National

Wed 9/9

9:10 am-10:12 am

2 stops32h 02m

$901
Quickest round-trip

St. LouisBrussels

STL Lambert-St Louis - BRU Brussels Bruxelles-National

STLBRU

Lambert-St Louis

Sat 10/10

12:10 pm-7:10 am

1 stop12h 00m

Brussels Bruxelles-National

Fri 10/16

6:20 am-1:25 pm

1 stop14h 05m

$1,531

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 resultsSorted by cheapest first
1
2

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, 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 $494. If you are unable to visit Brussels during the month of February, then departing from St. Louis during the month January is also very affordable. Most momondo users find prices during this month for around $657.

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

Fastest flight time

12h 00m

Direct flights

None
The fastest flight from St. Louis to Brussels takes 12h 00m
There are no direct flights from St. Louis to Brussels. There are no popular flight routes from St. Louis to Brussels.
Search flight deals

Frequently asked questions about flying from St. Louis to Brussels

  • 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 12h 00m.

  • 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
LufthansaPriceFrom $441Free CancellationRating
6.8
8,177 reviews
Search Lufthansa flights
United AirlinesPriceFrom $507Free CancellationRating
7.4
10,086 reviews
Search United Airlines 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.

An easier way to manage your Brussels 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 9/7
Mon 9/14
By creating a price alert you accept our terms of use and privacy policy.

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