$376+ 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 7/6. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BRU
Mar 5 — Mar 121
1 adult, Economy
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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
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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 3, 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 3, 2026.
This Mytrip deal was found by Cheapflights users on 2/2. 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 3/24:05 pm
STL
- BRU
2 stops14h 10m
Multiple Airlines
Wed 3/117:00 am
BRU
- STL
1 stop13h 55m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$470
This Flighttix deal was found by Cheapflights users on 2/2. 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/26:55 pm
STL
- BRU
2 stops29h 55m
Air Canada
Wed 3/1110:00 am
BRU
- STL
2 stops34h 42m
Air Canada
Deal found 2/2![Air Canada logo]()
$472
This United Airlines deal was found by Cheapflights users on 2/1. 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.
Tue 3/173:30 pm
STL
- BRU
2 stops15h 45m
United Airlines
Tue 3/2410:00 am
BRU
- STL
2 stops38h 00m
United Airlines
Deal found 2/1![United Airlines logo]()
$487
This United Airlines deal was found by Cheapflights users on 2/3. 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 3/186:25 am
STL
- BRU
1 stop19h 30m
United Airlines
Wed 3/2510:00 am
BRU
- STL
2 stops38h 00m
United Airlines
Deal found 2/3![United Airlines logo]()
$489
This Flighttix deal was found by Cheapflights users on 2/2. 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/212:15 pm
STL
- BRU
1 stop12h 00m
Lufthansa
Wed 3/1110:10 am
BRU
- STL
1 stop13h 50m
Lufthansa
Deal found 2/2![Lufthansa logo]()
$496
This United Airlines deal was found by Cheapflights users on 2/1. 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 3/18:17 am
STL
- BRU
2 stops21h 58m
United Airlines
Sun 3/810:10 am
BRU
- STL
1 stop16h 57m
United Airlines
Deal found 2/1![United Airlines logo]()
$507
This United Airlines deal was found by Cheapflights users on 2/1. 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.
Tue 3/33:15 pm
STL
- BRU
2 stops15h 00m
United Airlines
Sun 3/811:55 am
BRU
- STL
2 stops15h 12m
United Airlines
Deal found 2/1![United Airlines logo]()
$511
This oojo deal was found by Cheapflights users on 2/1. 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.
Sun 3/14:13 pm
STL
- BRU
2 stops20h 42m
British Airways
Sun 3/89:35 pm
BRU
- STL
2 stops29h 36m
British Airways
Deal found 2/1![British Airways logo]()
$512
This Mytrip deal was found by Cheapflights users on 2/2. 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.
Tue 5/197:30 am
STL
- CRL
3 stops30h 00m
Multiple Airlines
Fri 5/299:50 am
CRL
- STL
2 stops17h 14m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$1,063
This Mytrip deal was found by Cheapflights users on 2/2. 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
- CRL
3 stops24h 30m
Multiple Airlines
Tue 7/217:45 pm
CRL
- STL
2 stops24h 40m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$1,761
This Mytrip deal was found by Cheapflights users on 2/2. 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 7/158:55 am
STL
- CRL
3 stops30h 20m
Multiple Airlines
Thu 7/306:10 pm
CRL
- STL
2 stops26h 15m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$1,827
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 3, 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 3, 2026.
This United Airlines deal was found by Cheapflights users on 2/1. 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.
Tue 3/171:14 pm
STL
- BRU
2 stops18h 01m
United Airlines
Tue 3/2410:00 am
BRU
- STL
2 stops38h 00m
United Airlines
Deal found 2/1![United Airlines logo]()
$487
This United Airlines deal was found by Cheapflights users on 2/3. 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 3/186:25 am
STL
- BRU
1 stop19h 30m
United Airlines
Wed 3/2510:00 am
BRU
- STL
2 stops38h 00m
United Airlines
Deal found 2/3![United Airlines logo]()
$489
This Mytrip deal was found by Cheapflights users on 2/2. 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.
Tue 5/197:30 am
STL
- CRL
3 stops30h 00m
Multiple Airlines
Fri 5/299:50 am
CRL
- STL
2 stops17h 14m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$1,063
This United Airlines deal was found by Cheapflights users on 2/1. 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.
Tue 3/33:15 pm
STL
- BRU
2 stops15h 00m
United Airlines
Sun 3/810:10 am
BRU
- STL
1 stop15h 04m
United Airlines
Deal found 2/1![United Airlines logo]()
$507
This United Airlines deal was found by Cheapflights users on 2/1. 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 3/18:17 am
STL
- BRU
2 stops21h 58m
United Airlines
Sun 3/810:10 am
BRU
- STL
1 stop16h 57m
United Airlines
Deal found 2/1![United Airlines logo]()
$507
This Mytrip deal was found by Cheapflights users on 2/2. 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
- CRL
3 stops24h 30m
Multiple Airlines
Tue 7/217:45 pm
CRL
- STL
2 stops24h 40m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$1,761
This Mytrip deal was found by Cheapflights users on 2/2. 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 7/158:55 am
STL
- CRL
3 stops30h 20m
Multiple Airlines
Thu 7/306:10 pm
CRL
- STL
2 stops26h 15m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$1,827
Last-minute flights from St. Louis to BelgiumDiscover last-minute flight deals from St. Louis to Belgium. Data last updated February 3, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Belgium. Data last updated February 3, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 2/1. 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 3/18:17 am
STL
- BRU
2 stops21h 58m
United Airlines
Sun 3/810:10 am
BRU
- STL
1 stop16h 57m
United Airlines
Deal found 2/1![United Airlines logo]()
$507
This oojo deal was found by Cheapflights users on 2/1. 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.
Sun 3/14:13 pm
STL
- BRU
2 stops20h 42m
British Airways
Sun 3/89:35 pm
BRU
- STL
2 stops29h 36m
British Airways
Deal found 2/1![British Airways logo]()
$512
This Mytrip deal was found by Cheapflights users on 2/2. 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 3/24:05 pm
STL
- BRU
2 stops14h 10m
Multiple Airlines
Wed 3/117:00 am
BRU
- STL
1 stop13h 55m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$470
This Flighttix deal was found by Cheapflights users on 2/2. 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/26:55 pm
STL
- BRU
2 stops29h 55m
Air Canada
Wed 3/1110:00 am
BRU
- STL
2 stops34h 42m
Air Canada
Deal found 2/2![Air Canada logo]()
$472
This Flighttix deal was found by Cheapflights users on 2/2. 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/212:15 pm
STL
- BRU
1 stop12h 00m
Lufthansa
Wed 3/1110:10 am
BRU
- STL
1 stop13h 50m
Lufthansa
Deal found 2/2![Lufthansa logo]()
$496
This United Airlines deal was found by Cheapflights users on 2/1. 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.
Tue 3/33:15 pm
STL
- BRU
2 stops15h 00m
United Airlines
Sun 3/811:55 am
BRU
- STL
2 stops15h 12m
United Airlines
Deal found 2/1![United Airlines logo]()
$511
This United Airlines deal was found by Cheapflights users on 2/1. 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.
Tue 3/173:30 pm
STL
- BRU
2 stops15h 45m
United Airlines
Tue 3/2410:00 am
BRU
- STL
2 stops38h 00m
United Airlines
Deal found 2/1![United Airlines logo]()
$487
This United Airlines deal was found by Cheapflights users on 2/3. 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 3/186:25 am
STL
- BRU
1 stop19h 30m
United Airlines
Wed 3/2510:00 am
BRU
- STL
2 stops38h 00m
United Airlines
Deal found 2/3![United Airlines logo]()
$489
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 3, 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 3, 2026.
This Mytrip deal was found by Cheapflights users on 2/2. 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
- CRL
3 stops24h 30m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$376
This Mytrip deal was found by Cheapflights users on 2/2. 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 7/58:55 am
STL
- BRU
2 stops27h 30m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$417
This Mytrip deal was found by Cheapflights users on 2/2. 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 7/52:40 pm
STL
- CRL
2 stops23h 45m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$430
This Kiwi.com deal was found by Cheapflights users on 2/2. 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
- BRU
2 stops37h 50m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$440
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Tue 7/73:30 pm
STL
- CRL
2 stops22h 00m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$515
This Mytrip deal was found by Cheapflights users on 2/2. 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.
Tue 7/712:10 pm
STL
- BRU
3 stops17h 20m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$529
This FlightHub deal was found by Cheapflights users on 2/2. 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
2 stops17h 15m
Air Canada
Deal found 2/2![Air Canada logo]()
$595
This Cheapflightsfares deal was found by Cheapflights users on 2/2. 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.
Mon 7/63:30 pm
STL
- BRU
1 stop11h 40m
Lufthansa
Deal found 2/2![Lufthansa logo]()
$687
This Cheapflightsfares deal was found by Cheapflights users on 2/2. 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 7/73:30 pm
STL
- BRU
1 stop11h 40m
Lufthansa
Deal found 2/2![Lufthansa logo]()
$692
This United Airlines deal was found by Cheapflights users on 2/1. 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.
Tue 5/197:45 am
STL
- BRU
2 stops16h 55m
United Airlines
Deal found 2/1![United Airlines logo]()
$1,139
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 3, 2026.
Round-trip from | $470 (Mytrip) |
|---|---|
One-way from | $376 (Mytrip) |
Popular in | December |
Cheapest in | February |
Average price | $512 |
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 3, 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
Tue 3/17
1:14 pm-1:15 pm
2 stops18h 01m
Brussels Bruxelles-National
Tue 3/24
10:00 am-6:00 pm
2 stops38h 00m
$487
St. LouisBrussels
STL - BRU
STLBRU
Lambert-St Louis
Wed 3/18
6:25 am-7:55 am
1 stop19h 30m
Brussels Bruxelles-National
Wed 3/25
10:00 am-6:00 pm
2 stops38h 00m
$489
St. LouisBrussels
STL - BRU
STLBRU
Lambert-St Louis
Tue 3/3
3:15 pm-1:15 pm
2 stops15h 00m
Brussels Bruxelles-National
Sun 3/8
10:10 am-7:14 pm
1 stop15h 04m
$507
St. LouisBrussels
STL - BRU
STLBRU
Lambert-St Louis
Sun 3/1
8:17 am-1:15 pm
2 stops21h 58m
Brussels Bruxelles-National
Sun 3/8
10:10 am-9:07 pm
1 stop16h 57m
$507
St. LouisBrussels
STL - CRL
STLCRL
Lambert-St Louis
Tue 5/19
7:30 am-8:30 pm
3 stops30h 00m
Charleroi Brussels
Fri 5/29
9:50 am-8:04 pm
2 stops17h 14m
$1,063
St. LouisBrussels
STL - CRL
STLCRL
Lambert-St Louis
Mon 7/6
12:10 pm-7:40 pm
3 stops24h 30m
Charleroi Brussels
Tue 7/21
7:45 pm-1:25 pm
2 stops24h 40m
$1,761
St. LouisBrussels
STL - CRL
STLCRL
Lambert-St Louis
Wed 7/15
8:55 am-10:15 pm
3 stops30h 20m
Charleroi Brussels
Thu 7/30
6:10 pm-1:25 pm
2 stops26h 15m
$1,827
St. LouisBrussels
STL - CRL
STLCRL
Lambert-St Louis
Tue 7/7
12:10 pm-7:40 pm
3 stops24h 30m
$376
St. LouisBrussels
STL - CRL
STLCRL
Lambert-St Louis
Mon 7/6
12:10 pm-7:40 pm
3 stops24h 30m
$376
St. LouisBrussels
STL - BRU
STLBRU
Lambert-St Louis
Sun 7/5
8:55 am-7:25 pm
2 stops27h 30m
$417
Showing 1-10 of 17 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 3, 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.
Overall
7.4
Crew
8.1
Comfort
7.3
Boarding
7.7
Entertainment
7.1
Food
6.6
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Overall
7.4
Crew
8.1
Comfort
7.3
Boarding
7.7
Entertainment
7.1
Food
6.6
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Overall
7.4
Crew
8.1
Comfort
7.3
Boarding
7.7
Entertainment
7.1
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 for St. Louis to Belgium
See prices for flight routes from nearby airports that may be better suited for you.
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 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$441 | Average$2,205 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$606 | Average$780 | FlexibilityNo cancel fee | On-time69% |