What is the cheapest airline that flies from Lambert-St Louis to Belgium?

Air Canada and KLM are the most popular carriers operating from Lambert-St Louis to Belgium

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?

As of September 2026, there are 2 operators available to choose from 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.

$449 Cheap Flights from St. Louis to Belgium in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Belgium

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

4:05 pm - 8:10 pmSTL Lambert-St Louis-BRU Brussels Bruxelles-National

21h 05m2 stops Toronto Pearson Intl London Heathrow

8:25 am - 1:45 pmBRU Brussels Bruxelles-National-STL Lambert-St Louis

12h 20m1 stop Frankfurt am Main

$725Multiple Airlines

Mon, Nov 2 - Wed, Nov 11

3:30 pm - 1:15 pmSTL Lambert-St Louis-BRU Brussels Bruxelles-National

14h 45m2 stops Chicago O'Hare Intl London Heathrow

10:00 am - 4:19 pmBRU Brussels Bruxelles-National-STL Lambert-St Louis

37h 19m2 stops Montreal Pierre Elliott Trudeau Intl Newark

$727United Airlines

Mon, Dec 7 - Fri, Dec 11

10:50 am - 1:15 pmSTL Lambert-St Louis-BRU Brussels Bruxelles-National

19h 25m2 stops Chicago O'Hare Intl London Heathrow

10:00 am - 4:19 pmBRU Brussels Bruxelles-National-STL Lambert-St Louis

37h 19m2 stops Montreal Pierre Elliott Trudeau Intl Newark

$727United Airlines

Mon, Dec 7 - Fri, Dec 11

10:53 am - 7:50 amSTL Lambert-St Louis-BRU Brussels Bruxelles-National

13h 57m2 stops Chicago O'Hare Intl Montreal Pierre Elliott Trudeau Intl

10:00 am - 9:40 pmBRU Brussels Bruxelles-National-STL Lambert-St Louis

18h 40m2 stops Montreal Pierre Elliott Trudeau Intl Chicago O'Hare Intl

$728Air Canada

Mon, Nov 2 - Wed, Nov 11

9:37 am - 8:55 amSTL Lambert-St Louis-BRU Brussels Bruxelles-National

16h 18m1 stop Chicago O'Hare Intl

10:00 am - 4:19 pmBRU Brussels Bruxelles-National-STL Lambert-St Louis

37h 19m2 stops Montreal Pierre Elliott Trudeau Intl Newark

$730United Airlines

Mon, Dec 7 - Fri, Dec 11

6:50 pm - 4:15 pmSTL Lambert-St Louis-BRU Brussels Bruxelles-National

14h 25m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

8:25 am - 1:45 pmBRU Brussels Bruxelles-National-STL Lambert-St Louis

12h 20m1 stop Frankfurt am Main

$747Lufthansa

Mon, Nov 2 - Wed, Nov 11

1:20 pm - 11:10 amSTL Lambert-St Louis-BRU Brussels Bruxelles-National

14h 50m2 stops Chicago O'Hare Intl London Heathrow

12:00 pm - 10:15 pmBRU Brussels Bruxelles-National-STL Lambert-St Louis

17h 15m2 stops London Heathrow Chicago O'Hare Intl

$756British Airways

Mon, Nov 2 - Wed, Nov 11

5:05 pm - 8:05 amSTL Lambert-St Louis-BRU Brussels Bruxelles-National

32h 00m1 stop Newark

10:00 am - 3:26 pmBRU Brussels Bruxelles-National-STL Lambert-St Louis

36h 26m2 stops Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl

$790Multiple Airlines

Mon, Dec 7 - Sat, Dec 12

12:20 pm - 1:40 pmSTL Lambert-St Louis-BRU Brussels Bruxelles-National

18h 20m2 stops Newark Frankfurt am Main

7:30 pm - 1:25 pmBRU Brussels Bruxelles-National-STL Lambert-St Louis

24h 55m2 stops Munich Franz Josef Strauss Frankfurt am Main

$1,081Lufthansa

Wed, Sep 30 - Mon, Oct 5

6:55 pm - 11:10 pmSTL Lambert-St Louis-BRU Brussels Bruxelles-National

21h 15m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

11:55 am - 7:35 pmBRU Brussels Bruxelles-National-STL Lambert-St Louis

14h 40m1 stop Washington, D.C. Dulles Intl

$2,239Lufthansa

Sun, Dec 13 - Sun, Dec 27

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Delta flights from St. Louis to Belgium

Our best Delta deals on St. Louis to Belgium flight tickets

Delta

Sep 30

STL7:05 amLambert-St Louis

17h 35m

1 stop

BRU7:40 amBrussels Bruxelles-National

Oct 5

BRU9:45 amBrussels Bruxelles-National

15h 00m

1 stop

STL5:45 pmLambert-St Louis

$766

Delta

Sep 30

STL12:00 pmLambert-St Louis

12h 40m

1 stop

BRU7:40 amBrussels Bruxelles-National

Oct 5

BRU10:20 amBrussels Bruxelles-National

20h 02m

2 stops

STL11:22 pmLambert-St Louis

$786

Air Canada flights from St. Louis to Belgium

Our best Air Canada deals on St. Louis to Belgium flight tickets

Air Canada

Nov 2

STL10:53 amLambert-St Louis

13h 57m

2 stops

BRU7:50 amBrussels Bruxelles-National

Nov 11

BRU10:00 amBrussels Bruxelles-National

18h 40m

2 stops

STL9:40 pmLambert-St Louis

$728

Air Canada

Oct 6

STL12:10 pmLambert-St Louis

24h 50m

2 stops

BRU8:00 pmBrussels Bruxelles-National

Oct 13

BRU9:10 amBrussels Bruxelles-National

37h 33m

2 stops

STL3:43 pmLambert-St Louis

$883

Air Canada

Oct 6

STL12:10 pmLambert-St Louis

12h 00m

1 stop

BRU7:10 amBrussels Bruxelles-National

Oct 13

BRU9:10 amBrussels Bruxelles-National

34h 03m

2 stops

STL12:13 pmLambert-St Louis

$886

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 11/2

4:05 pm-8:10 pm

2 stops21h 05m

Brussels Bruxelles-National

Wed 11/11

8:25 am-1:45 pm

1 stop12h 20m

$725

St. LouisBrussels

STL Lambert-St Louis - BRU Brussels Bruxelles-National

STLBRU

Lambert-St Louis

Mon 12/7

3:30 pm-1:15 pm

2 stops14h 45m

Brussels Bruxelles-National

Fri 12/11

10:00 am-4:19 pm

2 stops37h 19m

$727

St. LouisBrussels

STL Lambert-St Louis - BRU Brussels Bruxelles-National

STLBRU

Lambert-St Louis

Mon 12/7

10:50 am-1:15 pm

2 stops19h 25m

Brussels Bruxelles-National

Fri 12/11

10:00 am-4:19 pm

2 stops37h 19m

$727

St. LouisBrussels

STL Lambert-St Louis - BRU Brussels Bruxelles-National

STLBRU

Lambert-St Louis

Mon 11/2

10:53 am-7:50 am

2 stops13h 57m

Brussels Bruxelles-National

Wed 11/11

10:00 am-9:40 pm

2 stops18h 40m

$728

St. LouisBrussels

STL Lambert-St Louis - BRU Brussels Bruxelles-National

STLBRU

Lambert-St Louis

Mon 12/7

9:37 am-8:55 am

1 stop16h 18m

Brussels Bruxelles-National

Fri 12/11

10:00 am-4:19 pm

2 stops37h 19m

$730

Quickest round-trip

St. LouisBrussels

STL Lambert-St Louis - BRU Brussels Bruxelles-National

STLBRU

Lambert-St Louis

Mon 11/2

6:50 pm-4:15 pm

2 stops14h 25m

Brussels Bruxelles-National

Wed 11/11

8:25 am-1:45 pm

1 stop12h 20m

$747

St. LouisBrussels

STL Lambert-St Louis - BRU Brussels Bruxelles-National

STLBRU

Lambert-St Louis

Mon 11/2

1:20 pm-11:10 am

2 stops14h 50m

Brussels Bruxelles-National

Wed 11/11

12:00 pm-10:15 pm

2 stops17h 15m

$756

St. LouisBrussels

STL Lambert-St Louis - BRU Brussels Bruxelles-National

STLBRU

Lambert-St Louis

Mon 12/7

5:05 pm-8:05 am

1 stop32h 00m

Brussels Bruxelles-National

Sat 12/12

10:00 am-3:26 pm

2 stops36h 26m

$790

St. LouisBrussels

STL Lambert-St Louis - BRU Brussels Bruxelles-National

STLBRU

Lambert-St Louis

Wed 9/30

12:20 pm-1:40 pm

2 stops18h 20m

Brussels Bruxelles-National

Mon 10/5

7:30 pm-1:25 pm

2 stops24h 55m

$1,081

St. LouisBrussels

STL Lambert-St Louis - BRU Brussels Bruxelles-National

STLBRU

Lambert-St Louis

Sun 12/13

6:55 pm-11:10 pm

2 stops21h 15m

Brussels Bruxelles-National

Sun 12/27

11:55 am-7:35 pm

1 stop14h 40m

$2,239

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

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 $494. If you are unable to visit Belgium 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.

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

Best Price Found	$449
Fastest flight time	12h 00m
Direct flights	None

The best one-way flight to Belgium from St. Louis in the past 72 hours is $449. The best round-trip flight deal from St. Louis to Belgium found on momondo in the last 72 hours is $725.

The fastest flight from St. Louis to Belgium takes 12h 00m

There are no direct flights from St. Louis to Belgium. There are no popular flight routes from St. Louis to Belgium.

Search flight deals

Frequently asked questions about flying from St. Louis to Belgium

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?
As of September 2026, there are 2 operators available to choose from 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
Lufthansa	PriceFrom $441	Free Cancellation	Rating 6.8 8,216 reviews		Search Lufthansa flights
United Airlines	PriceFrom $507	Free Cancellation	Rating 7.4 10,191 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.

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Cheap flights from St. Louis to Belgium from $449

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 10/31. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Delta flights from St. Louis to Belgium

Our best Delta deals on St. Louis to Belgium flight tickets

Air Canada flights from St. Louis to Belgium

Our best Air Canada deals on St. Louis to Belgium flight tickets

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See travel insights to Belgium from

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

What is the cheapest month to fly to Belgium?

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

What is the cheapest airline that flies from Lambert-St Louis to Belgium?

Cheap St. Louis to Belgium flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from St. Louis to Belgium

Best airlines flying from St. Louis to Belgium

Compare and see reviews for airlines that fly from St. Louis to Belgium with momondo

Why use momondo?

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.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Belgium

Popular cities in Belgium

Popular flights according to clicks in the last 7 days on momondo

St. Louis flight routes

According to popular flight searches on momondo this year

Belgium flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to Belgium

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Cabin classes currently available on flights to Belgium

List of cabin classes available on flights landing in Belgium. Availability may vary depending on flight origin and airline.

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According to popular flight searches on momondo this year