$553+ Cheap flights from Missouri to Belfast Intl (BFS)
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 12/23. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BFS
Sep 10 — Sep 171
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 Missouri to Belfast Intl
Keep the following information in mind while searching for Missouri to Belfast Intl flight deals. Data was last updated September 5, 2025.
Round-trip from | $1,966 (Mytrip) |
|---|---|
One-way from | $553 (Kiwi.com) |
Find flight deals from Missouri to Belfast Intl
Cheapest flights from Missouri to Belfast IntlExplore the most affordable flight options available from Missouri to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 5, 2025.
Explore the most affordable flight options available from Missouri to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 5, 2025.
This Mytrip deal was found by Cheapflights users on 9/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/184:05 pmSTL - BFS
2 stops19h 05mMultiple Airlines
Sat 10/256:00 amBFS - STL
3 stops32h 09mMultiple Airlines
Deal found 9/3![Multiple Airlines logo]()
$1,966
Cheapflights Fare Finder
Customize your flight search to find flights from Missouri to Belfast Intl 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 September 5, 2025.
Use the filters below to find and compare flights from Missouri to Belfast Intl Airport that are best for you.
Fly from
Missouri
Fly to
Belfast Intl
Route
Depart
Return
Price
St. LouisBelfast
STL - BFS
STLBFS
Lambert-St Louis
Sat 10/18
4:05 pm-5:10 pm
2 stops19h 05m
Belfast Intl
Sat 10/25
6:00 am-8:09 am
3 stops32h 09m
$1,966
St. LouisBelfast
STL - BFS
STLBFS
Lambert-St Louis
Tue 12/23
4:55 pm-10:30 am
3 stops59h 35m
$553
Best time to book a flight from Missouri to Belfast Intl
Have a flexible travel schedule? Discover the best time to fly to Belfast Intl from Missouri 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 Missouri to Belfast Intl Airport
What is the cheapest time of day to fly from MO to BFS?
Find hourly flight availability from Missouri to Belfast Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 5, 2025.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Missouri to Belfast Intl Airport as you normally would.
Related info for your journey
Find useful and relevant information for your journey from Missouri to Belfast Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Missouri to Belfast Intl
See prices for flight routes from nearby airports that may be better suited for you.
Top airline flying from Missouri to Belfast Intl
Discover the top airline that operate flights from Missouri to Belfast Intl. 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 September 5, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$674 | Average$832 | FlexibilityNo cancel fee | On-time71% |