Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Belgium from $336

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 Belgium departing on 10/15. 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 Belgium

Cheap round-trip flights

Scandinavian Airlines Logo
4:00 pm - 2:30 pmSTL-BRU
15h 30m2 stops
Scandinavian Airlines Logo
10:20 am - 8:39 pmBRU-STL
17h 19m2 stops
$526Scandinavian Airlines
Find Deal
Mon, Jan 12 - Fri, Jan 23
United Airlines Logo
11:05 am - 8:55 amSTL-BRU
14h 50m1 stop
United Airlines Logo
10:00 am - 2:25 pmBRU-STL
35h 25m2 stops
$534United Airlines
Find Deal
Wed, Nov 12 - Thu, Nov 27
United Airlines Logo
3:11 pm - 8:55 amSTL-BRU
10h 44m1 stop
United Airlines Logo
10:10 am - 5:43 pmBRU-STL
14h 33m1 stop
$556United Airlines
Find Deal
Mon, Jan 12 - Fri, Jan 23
Multiple Airlines Logo
10:30 am - 7:50 amSTL-BRU
14h 20m2 stops
Multiple Airlines Logo
7:55 pm - 9:10 pmBRU-STL
31h 15m2 stops
$580Multiple Airlines
Find Deal
Tue, Mar 3 - Mon, Mar 9
Air Canada Logo
1:30 pm - 1:15 pmSTL-BRU
16h 45m2 stops
Air Canada Logo
10:00 am - 3:46 pmBRU-STL
35h 46m2 stops
$597Air Canada
Find Deal
Tue, Oct 14 - Wed, Oct 29
Air Canada Logo
1:30 pm - 9:45 amSTL-BRU
13h 15m2 stops
Air Canada Logo
10:00 am - 3:29 pmBRU-STL
35h 29m2 stops
$598Air Canada
Find Deal
Tue, Oct 14 - Wed, Oct 29
Multiple Airlines Logo
1:30 pm - 9:45 amSTL-BRU
13h 15m2 stops
Multiple Airlines Logo
10:00 am - 3:29 pmBRU-STL
35h 29m2 stops
$599Multiple Airlines
Find Deal
Tue, Oct 14 - Wed, Oct 29
Lufthansa Logo
6:43 pm - 8:40 pmSTL-BRU
19h 57m2 stops
Lufthansa Logo
9:00 am - 11:44 pmBRU-STL
21h 44m2 stops
$619Lufthansa
Find Deal
Fri, Oct 31 - Fri, Nov 7
Lufthansa Logo
1:10 pm - 7:15 amSTL-BRU
11h 05m1 stop
Lufthansa Logo
2:25 pm - 1:55 pmBRU-STL
30h 30m1 stop
$637Lufthansa
Find Deal
Wed, Nov 12 - Thu, Nov 27
American Airlines Logo
2:21 pm - 10:50 amSTL-BRU
13h 29m2 stops
American Airlines Logo
11:50 am - 11:32 pmBRU-STL
17h 42m3 stops
$642American Airlines
Find Deal
Tue, Mar 3 - Mon, Mar 9

United Airlines flights from St. Louis to Belgium

Our best United Airlines deals on St. Louis to Belgium flight tickets
United Airlines
Nov 12
STL11:05 amLambert-St Louis
14h 50m
1 stop
BRU8:55 amBrussels Bruxelles-National
Nov 27
BRU10:00 amBrussels Bruxelles-National
35h 25m
2 stops
STL2:25 pmLambert-St Louis
$534
Find similar
United Airlines
Jan 12
STL3:11 pmLambert-St Louis
10h 44m
1 stop
BRU8:55 amBrussels Bruxelles-National
Jan 23
BRU10:10 amBrussels Bruxelles-National
14h 33m
1 stop
STL5:43 pmLambert-St Louis
$556
Find similar
United Airlines
Jan 12
STL3:11 pmLambert-St Louis
15h 04m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Jan 23
BRU11:55 amBrussels Bruxelles-National
13h 38m
1 stop
STL6:33 pmLambert-St Louis
$560
Find similar

Lufthansa flights from St. Louis to Belgium

Our best Lufthansa deals on St. Louis to Belgium flight tickets
Lufthansa
Oct 31
STL6:43 pmLambert-St Louis
19h 57m
2 stops
BRU8:40 pmBrussels Bruxelles-National
Nov 7
BRU9:00 amBrussels Bruxelles-National
21h 44m
2 stops
STL11:44 pmLambert-St Louis
$619
Find similar
Lufthansa
Nov 12
STL1:10 pmLambert-St Louis
11h 05m
1 stop
BRU7:15 amBrussels Bruxelles-National
Nov 27
BRU2:25 pmBrussels Bruxelles-National
30h 30m
1 stop
STL1:55 pmLambert-St Louis
$637
Find similar
Lufthansa
Oct 31
STL6:43 pmLambert-St Louis
19h 57m
2 stops
BRU8:40 pmBrussels Bruxelles-National
Nov 7
BRU7:00 amBrussels Bruxelles-National
13h 55m
1 stop
STL1:55 pmLambert-St Louis
$652
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Belgium 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 September 17, 2025.
Use the filters below to find and compare flights from St. Louis to Belgium that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 1/12

4:00 pm-2:30 pm

2 stops15h 30m

Brussels Bruxelles-National

Fri 1/23

10:20 am-8:39 pm

2 stops17h 19m

$526

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 11/12

11:05 am-8:55 am

1 stop14h 50m

Brussels Bruxelles-National

Thu 11/27

10:00 am-2:25 pm

2 stops35h 25m

$534

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 1/12

3:11 pm-8:55 am

1 stop10h 44m

Brussels Bruxelles-National

Fri 1/23

10:10 am-5:43 pm

1 stop14h 33m

$556

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 3/3

10:30 am-7:50 am

2 stops14h 20m

Brussels Bruxelles-National

Mon 3/9

7:55 pm-9:10 pm

2 stops31h 15m

$580

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 10/14

1:30 pm-1:15 pm

2 stops16h 45m

Brussels Bruxelles-National

Wed 10/29

10:00 am-3:46 pm

2 stops35h 46m

$597

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 10/14

1:30 pm-9:45 am

2 stops13h 15m

Brussels Bruxelles-National

Wed 10/29

10:00 am-3:29 pm

2 stops35h 29m

$598

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 10/14

1:30 pm-9:45 am

2 stops13h 15m

Brussels Bruxelles-National

Wed 10/29

10:00 am-3:29 pm

2 stops35h 29m

$599

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 10/31

6:43 pm-8:40 pm

2 stops19h 57m

Brussels Bruxelles-National

Fri 11/7

9:00 am-11:44 pm

2 stops21h 44m

$619

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 11/12

1:10 pm-7:15 am

1 stop11h 05m

Brussels Bruxelles-National

Thu 11/27

2:25 pm-1:55 pm

1 stop30h 30m

$637

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Tue 3/3

2:21 pm-10:50 am

2 stops13h 29m

Brussels Bruxelles-National

Mon 3/9

11:50 am-11:32 pm

3 stops17h 42m

$642

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

See travel insights to Belgium from

How to get the cheapest flight ticket from St. Louis to Belgium

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 Belgium?

In general, February is the cheapest month to fly from St. Louis to Belgium. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $690. If you are unable to visit Belgium during the month of February, then departing from St. Louis during the month March is also very affordable. Most momondo users find prices during this month for around $736.

What is the cheapest day to depart on your flight to Belgium?

Our data shows that Friday is the least expensive day to fly to Belgium. Tickets to fly out on this day can be as low as $1,035. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $1,431. These prices are subject to change though, so be sure to set up a Price Alert for flights to Belgium.

What is the cheapest time of day to depart on your flight to Belgium?

Our most recent data shows that the best time of day to fly to Belgium is in the afternoon. Flights from St. Louis to Belgium during this time can be as low as $1,088. Flights to Belgium are more costly at noon, with an average ticket price of $1,420. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

Can stopping save me money on St. Louis to Belgium flights?

You could potentially save up to 14% on your flight if you consider stops on a St. Louis to Belgium flight.

Cheap St. Louis to Belgium flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Belgium

Direct flights

None
There are no direct flights from St. Louis to Belgium. There are no popular flight routes from St. Louis to Belgium.
Search flight deals

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Belgium?

    Prices for flights from Lambert-St Louis Airport to Belgium are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Belgium?

  • How old do you have to be to fly from Lambert-St Louis Airport to Belgium?

    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 Belgium.

  • What documentation or ID do you need to fly to Belgium?

    The travel and health documents required for your trip to Belgium 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 Belgium. 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 Belgium

Compare and see reviews for airlines that fly from St. Louis to Belgium with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $656Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Belgium?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to Belgium. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from St. Louis to Belgium with flexible booking policies on momondo?

Flights from St. Louis to Belgium with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from St. Louis to Belgium?

Once all potential St. Louis to Belgium 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 Belgium right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of St. Louis to Belgium flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Belgium 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
Fri 10/17
Fri 10/24
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Belgium

Popular cities in Belgium

Popular flights according to clicks in the last 7 days on momondo
Flights to Brusselsfrom $349
Flights to Ostend