$300+ 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 4/24. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BRU
Mar 15 — Mar 221
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from St. Louis to Belgium with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from St. Louis to Belgium
Cheapest
Best
Last-minute
One-way
Cheapest flights from St. Louis to BelgiumExplore 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 February 13, 2026.
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 February 13, 2026.
This Mytrip deal was found by Cheapflights users on 2/10. 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.
Sat 4/119:10 am
STL
- BRU
2 stops39h 00m
Air Canada
Wed 4/229:25 am
BRU
- STL
2 stops42h 43m
Air Canada
Deal found 2/10![Air Canada logo]()
$492
This Gotogate deal was found by Cheapflights users on 2/11. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/186:25 am
STL
- BRU
2 stops19h 25m
Air Canada
Wed 3/2510:00 am
BRU
- STL
2 stops41h 15m
Air Canada
Deal found 2/11![Air Canada logo]()
$493
This Cheapflightsfares deal was found by Cheapflights users on 2/10. 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.
Wed 3/1811:28 am
STL
- BRU
2 stops19h 42m
Lufthansa
Wed 3/259:05 am
BRU
- STL
2 stops19h 54m
Lufthansa
Deal found 2/10![Lufthansa logo]()
$505
This Air Canada deal was found by Cheapflights users on 2/11. 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.
Wed 3/184:05 pm
STL
- BRU
2 stops15h 10m
Multiple Airlines
Wed 3/2510:00 am
BRU
- STL
2 stops35h 29m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$511
This United Airlines deal was found by Cheapflights users on 2/11. 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.
Sat 4/112:40 pm
STL
- BRU
2 stops33h 30m
United Airlines
Wed 4/2210:15 am
BRU
- STL
1 stop29h 20m
United Airlines
Deal found 2/11![United Airlines logo]()
$512
This United Airlines deal was found by Cheapflights users on 2/10. 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 3/1811:25 am
STL
- BRU
1 stop14h 30m
United Airlines
Wed 3/2510:15 am
BRU
- STL
2 stops16h 52m
United Airlines
Deal found 2/10![United Airlines logo]()
$514
This FlightHub deal was found by Cheapflights users on 2/12. 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.
Tue 3/3112:04 pm
STL
- BRU
2 stops38h 36m
Scandinavian Airlines
Fri 4/103:15 pm
BRU
- STL
2 stops36h 51m
Scandinavian Airlines
Deal found 2/12![Scandinavian Airlines logo]()
$635
This Booking.com deal was found by Cheapflights users on 2/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/167:40 am
STL
- BRU
2 stops18h 10m
Air Canada
Mon 3/2310:00 am
BRU
- STL
2 stops41h 07m
Air Canada
Deal found 2/12![Air Canada logo]()
$643
This Air Canada deal was found by Cheapflights users on 2/12. 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.
Tue 3/174:05 pm
STL
- BRU
2 stops15h 10m
Multiple Airlines
Tue 3/2410:00 am
BRU
- STL
2 stops35h 29m
Multiple Airlines
Deal found 2/12![Multiple Airlines logo]()
$662
This Mytrip deal was found by Cheapflights users on 2/10. 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.
Sun 8/1612:10 pm
STL
- CRL
2 stops26h 15m
Multiple Airlines
Mon 8/241:15 pm
CRL
- STL
3 stops31h 10m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$1,257
This Mytrip deal was found by Cheapflights users on 2/10. 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 7/228:55 am
STL
- CRL
3 stops30h 20m
Multiple Airlines
Tue 8/49:05 pm
CRL
- STL
3 stops29h 57m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$1,428
This Mytrip deal was found by Cheapflights users on 2/11. 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.
Thu 5/211:00 pm
STL
- CRL
2 stops19h 25m
Multiple Airlines
Sat 5/3011:10 am
CRL
- STL
3 stops31h 56m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$1,678
Best flights from St. Louis to BelgiumDiscover carefully curated flight deals from St. Louis to Belgium that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 13, 2026.
Discover carefully curated flight deals from St. Louis to Belgium that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 13, 2026.
This United Airlines deal was found by Cheapflights users on 2/11. 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.
Sat 4/112:40 pm
STL
- BRU
2 stops33h 30m
United Airlines
Wed 4/2210:15 am
BRU
- STL
1 stop29h 20m
United Airlines
Deal found 2/11![United Airlines logo]()
$512
This Booking.com deal was found by Cheapflights users on 2/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/167:40 am
STL
- BRU
2 stops18h 10m
Air Canada
Mon 3/2310:00 am
BRU
- STL
2 stops41h 07m
Air Canada
Deal found 2/12![Air Canada logo]()
$643
This KLM deal was found by Cheapflights users on 2/12. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/175:21 pm
STL
- BRU
1 stop32h 39m
KLM
Tue 3/242:45 pm
BRU
- STL
2 stops15h 13m
KLM
Deal found 2/12![KLM logo]()
$676
This Cheapflightsfares deal was found by Cheapflights users on 2/10. 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.
Tue 3/34:49 pm
STL
- BRU
2 stops16h 26m
Lufthansa
Sun 3/87:00 am
BRU
- STL
1 stop13h 55m
Lufthansa
Deal found 2/10![Lufthansa logo]()
$678
This United Airlines deal was found by Cheapflights users on 2/10. 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 3/1811:25 am
STL
- BRU
1 stop14h 30m
United Airlines
Wed 3/2510:15 am
BRU
- STL
2 stops16h 52m
United Airlines
Deal found 2/10![United Airlines logo]()
$514
This Mytrip deal was found by Cheapflights users on 2/10. 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 7/228:55 am
STL
- CRL
3 stops30h 20m
Multiple Airlines
Tue 8/49:05 pm
CRL
- STL
3 stops29h 57m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$1,428
This United Airlines deal was found by Cheapflights users on 2/10. 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.
Sun 3/11:11 pm
STL
- BRU
2 stops17h 04m
United Airlines
Wed 3/1110:00 am
BRU
- STL
2 stops34h 42m
United Airlines
Deal found 2/10![United Airlines logo]()
$686
This United Airlines deal was found by Cheapflights users on 2/10. 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 2/259:55 am
STL
- BRU
2 stops20h 20m
United Airlines
Sun 3/17:00 am
BRU
- STL
1 stop13h 55m
United Airlines
Deal found 2/10![United Airlines logo]()
$703
This Mytrip deal was found by Cheapflights users on 2/11. 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.
Thu 5/211:00 pm
STL
- CRL
2 stops19h 25m
Multiple Airlines
Sat 5/3011:10 am
CRL
- STL
3 stops31h 56m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$1,678
This Mytrip deal was found by Cheapflights users on 2/12. 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.
Thu 5/217:30 am
STL
- CRL
3 stops31h 00m
Multiple Airlines
Sat 7/254:55 pm
CRL
- STL
2 stops27h 30m
Multiple Airlines
Deal found 2/12![Multiple Airlines logo]()
$1,889
This Mytrip deal was found by Cheapflights users on 2/12. 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.
Sat 6/207:25 am
STL
- CRL
3 stops31h 15m
Multiple Airlines
Sat 7/49:05 pm
CRL
- STL
2 stops23h 20m
Multiple Airlines
Deal found 2/12![Multiple Airlines logo]()
$1,936
Last-minute flights from St. Louis to BelgiumDiscover last-minute flight deals from St. Louis to Belgium. Data last updated February 13, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Belgium. Data last updated February 13, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 2/10. 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.
Tue 3/34:49 pm
STL
- BRU
2 stops16h 26m
Lufthansa
Sun 3/87:00 am
BRU
- STL
1 stop13h 55m
Lufthansa
Deal found 2/10![Lufthansa logo]()
$678
This Booking.com deal was found by Cheapflights users on 2/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/167:40 am
STL
- BRU
2 stops18h 10m
Air Canada
Mon 3/2310:00 am
BRU
- STL
2 stops41h 07m
Air Canada
Deal found 2/12![Air Canada logo]()
$643
This Air Canada deal was found by Cheapflights users on 2/12. 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.
Tue 3/174:05 pm
STL
- BRU
2 stops15h 10m
Multiple Airlines
Tue 3/2410:00 am
BRU
- STL
2 stops35h 29m
Multiple Airlines
Deal found 2/12![Multiple Airlines logo]()
$662
This KLM deal was found by Cheapflights users on 2/12. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/175:21 pm
STL
- BRU
1 stop32h 39m
KLM
Tue 3/242:45 pm
BRU
- STL
2 stops15h 13m
KLM
Deal found 2/12![KLM logo]()
$676
This Gotogate deal was found by Cheapflights users on 2/11. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/186:25 am
STL
- BRU
2 stops19h 25m
Air Canada
Wed 3/2510:00 am
BRU
- STL
2 stops41h 15m
Air Canada
Deal found 2/11![Air Canada logo]()
$493
This Cheapflightsfares deal was found by Cheapflights users on 2/10. 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.
Wed 3/1811:28 am
STL
- BRU
2 stops19h 42m
Lufthansa
Wed 3/259:05 am
BRU
- STL
2 stops19h 54m
Lufthansa
Deal found 2/10![Lufthansa logo]()
$505
This Air Canada deal was found by Cheapflights users on 2/11. 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.
Wed 3/184:05 pm
STL
- BRU
2 stops15h 10m
Multiple Airlines
Wed 3/2510:00 am
BRU
- STL
2 stops35h 29m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$511
This United Airlines deal was found by Cheapflights users on 2/10. 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 3/1811:25 am
STL
- BRU
1 stop14h 30m
United Airlines
Wed 3/2510:15 am
BRU
- STL
2 stops16h 52m
United Airlines
Deal found 2/10![United Airlines logo]()
$514
This FlightHub deal was found by Cheapflights users on 2/12. 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.
Tue 3/3112:04 pm
STL
- BRU
2 stops38h 36m
Scandinavian Airlines
Fri 4/103:15 pm
BRU
- STL
2 stops36h 51m
Scandinavian Airlines
Deal found 2/12![Scandinavian Airlines logo]()
$635
One-way flights from St. Louis to BelgiumSearch for one-way flight options from St. Louis to Belgium. Find affordable one-way fares based on user searches. Data last updated February 13, 2026.
Search for one-way flight options from St. Louis to Belgium. Find affordable one-way fares based on user searches. Data last updated February 13, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/248:12 pm
STL
- BRU
2 stops33h 43m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$300
This United Airlines deal was found by Cheapflights users on 2/10. 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.
Sun 3/157:41 am
STL
- BRU
2 stops23h 34m
United Airlines
Deal found 2/10![United Airlines logo]()
$397
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/248:12 pm
STL
- CRL
3 stops43h 43m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$406
This Kiwi.com deal was found by Cheapflights users on 2/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/63:30 pm
STL
- CRL
2 stops33h 00m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$422
This Kiwi.com deal was found by Cheapflights users on 2/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/69:17 am
STL
- BRU
2 stops17h 23m
Aer Lingus
Deal found 2/11![Aer Lingus logo]()
$449
This Mytrip deal was found by Cheapflights users on 2/11. 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.
Mon 7/612:10 pm
STL
- BRU
3 stops24h 00m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$462
This Cheapflightsfares deal was found by Cheapflights users on 2/10. 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.
Fri 4/243:30 pm
STL
- BRU
1 stop11h 40m
Lufthansa
Deal found 2/10![Lufthansa logo]()
$464
This United Airlines deal was found by Cheapflights users on 2/10. 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.
Fri 4/243:15 pm
STL
- BRU
2 stops15h 00m
United Airlines
Deal found 2/10![United Airlines logo]()
$467
This oojo deal was found by Cheapflights users on 2/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/186:27 am
STL
- BRU
2 stops44h 13m
Aer Lingus
Deal found 2/10![Aer Lingus logo]()
$478
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/158:06 pm
STL
- BRU
3 stops39h 54m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$523
This FlightHub deal was found by Cheapflights users on 2/10. 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.
Mon 5/181:00 pm
STL
- BRU
1 stop11h 10m
Air Canada
Deal found 2/10![Air Canada logo]()
$598
Find 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 February 13, 2026.
Round-trip from | $492 (Mytrip) |
|---|---|
One-way from | $300 (Kiwi.com) |
Popular in | December |
Cheapest in | February |
Average price | $494 |
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 February 13, 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
Sat 4/11
2:40 pm-7:10 am
2 stops33h 30m
Brussels Bruxelles-National
Wed 4/22
10:15 am-8:35 am
1 stop29h 20m
$512
St. LouisBrussels
STL - BRU
STLBRU
Lambert-St Louis
Wed 3/18
11:25 am-7:55 am
1 stop14h 30m
Brussels Bruxelles-National
Wed 3/25
10:15 am-9:07 pm
2 stops16h 52m
$514
St. LouisBrussels
STL - BRU
STLBRU
Lambert-St Louis
Mon 3/16
7:40 am-7:50 am
2 stops18h 10m
Brussels Bruxelles-National
Mon 3/23
10:00 am-9:07 pm
2 stops41h 07m
$643
St. LouisBrussels
STL - BRU
STLBRU
Lambert-St Louis
Tue 3/17
5:21 pm-8:00 am
1 stop32h 39m
Brussels Bruxelles-National
Tue 3/24
2:45 pm-11:58 pm
2 stops15h 13m
$676
St. LouisBrussels
STL - BRU
STLBRU
Lambert-St Louis
Tue 3/3
4:49 pm-4:15 pm
2 stops16h 26m
Brussels Bruxelles-National
Sun 3/8
7:00 am-1:55 pm
1 stop13h 55m
$678
St. LouisBrussels
STL - BRU
STLBRU
Lambert-St Louis
Sun 3/1
1:11 pm-1:15 pm
2 stops17h 04m
Brussels Bruxelles-National
Wed 3/11
10:00 am-2:42 pm
2 stops34h 42m
$686
St. LouisBrussels
STL - BRU
STLBRU
Lambert-St Louis
Wed 2/25
9:55 am-1:15 pm
2 stops20h 20m
Brussels Bruxelles-National
Sun 3/1
7:00 am-1:55 pm
1 stop13h 55m
$703
St. LouisBrussels
STL - CRL
STLCRL
Lambert-St Louis
Wed 7/22
8:55 am-10:15 pm
3 stops30h 20m
Charleroi Brussels
Tue 8/4
9:05 pm-8:02 pm
3 stops29h 57m
$1,428
St. LouisBrussels
STL - CRL
STLCRL
Lambert-St Louis
Thu 5/21
1:00 pm-3:25 pm
2 stops19h 25m
Charleroi Brussels
Sat 5/30
11:10 am-12:06 pm
3 stops31h 56m
$1,678
St. LouisBrussels
STL - CRL
STLCRL
Lambert-St Louis
Thu 5/21
7:30 am-9:30 pm
3 stops31h 00m
Charleroi Brussels
Sat 7/25
4:55 pm-1:25 pm
2 stops27h 30m
$1,889
Showing 1-10 of 22 results
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.
STL-BRU
STL-CRL
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
STL-BE0
STL-BRU
STL-CRL
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 February 13, 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.
Crew
8.1
Boarding
7.7
Entertainment
7.1
Overall
7.4
Comfort
7.3
Food
6.6
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Crew
8.1
Boarding
7.7
Entertainment
7.1
Overall
7.4
Comfort
7.3
Food
6.6
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Crew
8.1
Boarding
7.7
Entertainment
7.1
Overall
7.4
Comfort
7.3
Food
6.6
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Top destinations
Alternative routes for St. Louis to Belgium
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Belgium by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from St. Louis to Belgium by cabin class
Find flights from St. Louis to Belgium, based on your preferred cabin class, be it economy, premium economy, business, or first class.
St. Louis and Belgium flights
Browse other St. Louis and Belgium flight options. Last updated on February 13, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
St. Louis to Belgium flights
Consider these flights traveling from St. Louis to Belgium.
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 February 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$441 | Average$2,205 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$606 | Average$785 | FlexibilityNo cancel fee | On-time69% |