$625+ Cheap flights from St. Louis (STL) to Belfast
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/12. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BHD
Jan 17 — Jan 241
1 adult, Economy
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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
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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 Belfast
Cheapest flights from St. Louis to BelfastExplore the most affordable flight options available from St. Louis to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.
Explore the most affordable flight options available from St. Louis to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.
This American Airlines deal was found by Cheapflights users on 12/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:06 pmSTL - BHD
2 stops18h 09mAmerican Airlines
Wed 1/76:35 amBHD - STL
2 stops17h 59mAmerican Airlines
Deal found 12/16![American Airlines logo]()
$1,094
This Trip.com deal was found by Cheapflights users on 12/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/181:05 pmSTL - BHD
2 stops25h 25mMultiple Airlines
Thu 1/87:25 amBHD - STL
2 stops22h 34mMultiple Airlines
Deal found 12/15![Multiple Airlines logo]()
$1,866
This American Airlines deal was found by Cheapflights users on 12/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/181:54 pmSTL - BHD
2 stops18h 06mAmerican Airlines
Thu 1/86:35 amBHD - STL
2 stops20h 40mAmerican Airlines
Deal found 12/15![American Airlines logo]()
$1,959
Find flight deals from St. Louis to Belfast
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Belfast (BF1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 18, 2025.
Round-trip from | $625 (oojo) |
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Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Belfast 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 December 18, 2025.
Use the filters below to find and compare flights from St. Louis to Belfast that are best for you.
Fly from
St. Louis
Fly to
Belfast
Route
Depart
Return
Price
St. LouisBelfast
STL - BHD
STLBHD
Lambert-St Louis
Mon 1/12
6:44 pm-6:35 pm
2 stops17h 51m
Belfast City
Tue 1/20
6:35 am-6:16 pm
2 stops17h 41m
$625
St. LouisBelfast
STL - BHD
STLBHD
Lambert-St Louis
Wed 2/11
11:05 am-4:35 pm
2 stops23h 30m
Belfast City
Sun 2/15
9:10 am-10:54 pm
2 stops19h 44m
$844
St. LouisBelfast
STL - BHD
STLBHD
Lambert-St Louis
Fri 2/6
5:04 pm-5:15 pm
2 stops18h 11m
Belfast City
Tue 2/10
7:25 pm-9:15 pm
2 stops31h 50m
$844
St. LouisBelfast
STL - BHD
STLBHD
Lambert-St Louis
Wed 12/31
2:06 pm-2:15 pm
2 stops18h 09m
Belfast City
Wed 1/7
6:35 am-6:34 pm
2 stops17h 59m
$1,094
Best time to book a flight from St. Louis to Belfast
Have a flexible travel schedule? Discover the best time to fly to Belfast 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 Belfast
What is the cheapest time of day to fly from STL to BFS?
Find hourly flight availability from St. Louis to Belfast. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 18, 2025.
When flying from St. Louis to Belfast, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 41% versus a flight at noon.