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$271+ Cheap flights from St. Louis (STL) to Belgium

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/24. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BRU
Feb 5 — Feb 121
Thu 2/5
Thu 2/12
1 adult, Economy
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Cheap flight deals from St. Louis to Belgium

Keep the following information in mind while searching for St. Louis to Belgium flight deals. Data was last updated January 6, 2026.

Round-trip from

$484
(Delta)

One-way from

$308
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$659
From Lambert-St Louis to Belgium
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One-way flight from Lambert-St Louis to Belgium
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Highest demand for flights based on searches. 24% potential increase in price ($302 potential increase over avg. RT price).
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Cheapest flight prices on average. 13% potential price decrease ($115 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Find flight deals from St. Louis to Belgium

Cheapest flights from St. Louis to Belgium
Explore the most affordable flight options available from St. Louis to Belgium. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 6, 2026.

This Delta deal was found by Cheapflights users on 1/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/194:21 pmSTL - BRU
1 stop33h 39mDelta
Thu 3/2610:00 amBRU - STL
1 stop35h 13mDelta
Deal found 1/5$484
This FlightHub deal was found by Cheapflights users on 1/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1811:28 amSTL - BRU
1 stop14h 37mMultiple Airlines
Wed 3/2510:00 amBRU - STL
2 stops34h 42mMultiple Airlines
Deal found 1/4$487
This United Airlines deal was found by Cheapflights users on 1/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/184:05 pmSTL - BRU
2 stops15h 10mUnited Airlines
Wed 3/2510:00 amBRU - STL
2 stops34h 42mUnited Airlines
Deal found 1/5$489
This Cheapflightsfares deal was found by Cheapflights users on 1/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/511:22 amSTL - BRU
1 stop13h 43mLufthansa
Mon 2/99:00 amBRU - STL
2 stops21h 59mLufthansa
Deal found 1/5$496
This Mytrip deal was found by Cheapflights users on 1/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/189:55 amSTL - BRU
2 stops14h 55mMultiple Airlines
Wed 2/2510:10 amBRU - STL
1 stop18h 30mMultiple Airlines
Deal found 1/4$503
This United Airlines deal was found by Cheapflights users on 1/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/192:45 pmSTL - BRU
2 stops15h 30mUnited Airlines
Thu 2/2610:10 amBRU - STL
1 stop17h 55mUnited Airlines
Deal found 1/5$505
This Mytrip deal was found by Cheapflights users on 1/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/187:41 amSTL - BRU
2 stops17h 09mAir Canada
Wed 2/2510:00 amBRU - STL
2 stops18h 40mAir Canada
Deal found 1/4$507
This Air Canada deal was found by Cheapflights users on 1/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/197:41 amSTL - BRU
3 stops17h 09mAir Canada
Thu 2/2610:00 amBRU - STL
2 stops36h 29mAir Canada
Deal found 1/5$522
This United Airlines deal was found by Cheapflights users on 1/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/194:05 pmSTL - BRU
2 stops15h 10mUnited Airlines
Thu 3/269:40 amBRU - STL
2 stops17h 27mUnited Airlines
Deal found 1/5$528
This Mytrip deal was found by Cheapflights users on 1/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/134:05 pmSTL - CRL
2 stops23h 10mMultiple Airlines
Tue 3/173:30 pmCRL - STL
2 stops29h 25mMultiple Airlines
Deal found 1/4$2,222

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated January 6, 2026.
Use the filters below to find and compare flights from St. Louis to Belgium that are best for you.

Fly from

St. Louis

Fly to

Belgium

Route

Depart

Return

Price

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 3/20

6:04 am-8:00 am

1 stop19h 56m

Brussels Bruxelles-National

Thu 3/26

10:00 am-11:58 pm

1 stop19h 58m

$484

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 3/18

11:28 am-8:05 am

1 stop14h 37m

Brussels Bruxelles-National

Wed 3/25

10:00 am-2:42 pm

2 stops34h 42m

$487

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Wed 3/18

4:05 pm-1:15 pm

2 stops15h 10m

Brussels Bruxelles-National

Wed 3/25

10:00 am-2:42 pm

2 stops34h 42m

$489

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Thu 2/19

2:45 pm-1:15 pm

2 stops15h 30m

Brussels Bruxelles-National

Thu 2/26

10:10 am-9:05 pm

1 stop17h 55m

$505

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Mon 3/23

10:12 am-8:00 am

1 stop15h 48m

Brussels Bruxelles-National

Mon 3/30

9:45 am-11:58 pm

1 stop21h 13m

$509

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Fri 3/20

4:05 pm-1:15 pm

2 stops15h 10m

Brussels Bruxelles-National

Thu 3/26

9:40 am-9:07 pm

2 stops17h 27m

$528

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Thu 3/19

6:10 am-7:35 am

2 stops19h 25m

Brussels Bruxelles-National

Mon 3/30

9:45 am-11:58 pm

1 stop21h 13m

$544

St. LouisBrussels

STL - CRL

STLCRL

Lambert-St Louis

Fri 3/13

4:05 pm-9:15 pm

2 stops23h 10m

Charleroi Brussels

Tue 3/17

3:30 pm-2:55 pm

2 stops29h 25m

$2,222

St. LouisBrussels

STL - CRL

STLCRL

Lambert-St Louis

Sat 1/24

12:12 pm-8:05 pm

3 stops48h 53m

$271

St. LouisBrussels

STL - BRU

STLBRU

Lambert-St Louis

Sat 1/24

8:22 pm-1:10 pm

3 stops33h 48m

$308

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/6

Showing 1-10 of 23 results
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Best time to book a flight from St. Louis to Belgium

Have a flexible travel schedule? Discover the best time to fly to Belgium from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Belgium

What is the cheapest month to book a flight from St. Louis to Belgium?

Currently, April is the cheapest month in which you can book a flight from St. Louis to Belgium (average of $443). Flying from St. Louis to Belgium in June is currently the most expensive (average of $1,008). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Belgium

Get insights into the airlines that provide service to Belgium. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Belgium. Reviews last updated January 6, 2026.
Read reviews from past customers who have flown United Airlines and Lufthansa from St. Louis to Belgium. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,132 reviews

Food

6.6

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Overall

7.4

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
United Airlines
7.4
Good
9,132 reviews
United Airlines
7.4
Good
9,132 reviews

Food

6.6

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Overall

7.4

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
Lufthansa
6.8
Okay
7,683 reviews
United Airlines
7.4
Good
9,132 reviews

Food

6.6

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Overall

7.4

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Belgium. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Louis to Belgium?

    Located just 12.7 mi from the city center, Lambert-St Louis (STL) is the airport most travelers will use when flying to Belgium from St. Louis.

  • How long is the flight from St. Louis to Belgium?

    There are many flights that can get you from St. Louis to Belgium in 15h 10m. Fly via Delta or United Airlines to get the fastest option. St. Louis and Belgium are separated by a distance of 4393 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from St. Louis to Belgium that include hotel bookings?

    Yes. In addition to deals on St. Louis to Belgium flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Belgium?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Belgium.

  • Can I find deals for business class flights from St. Louis to Belgium?

    Yes. Cheapflights offers flight deals from St. Louis to Belgium by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Louis to Belgium?

    Currently, April is the cheapest month in which you can book a flight from St. Louis to Belgium (average of $443). Flying from St. Louis to Belgium in June is currently the most expensive (average of $1,008). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 2 airlines flying from St. Louis to Belgium

Discover the top 2 airlines that operate flights from St. Louis to Belgium. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$441Average$2,205FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$628Average$778FlexibilityNo cancel feeOn-time69%

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