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Belfast Intl

$434+ 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 2/16. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BFS
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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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 15, 2025.

Round-trip from

$583
(Trip.com)

One-way from

$434
(Kiwi.com)
From Missouri to Belfast Intl
Search Deals
One-way flight from Missouri to Belfast Intl
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Find flight deals from Missouri to Belfast Intl

Cheapest flights from Missouri to Belfast Intl
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 15, 2025.

This Trip.com deal was found by Cheapflights users on 9/15. 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.
Mon 9/291:26 pmSTL - BFS
2 stops27h 44mMultiple Airlines
Tue 10/76:45 amBFS - STL
2 stops21h 19mMultiple Airlines
Deal found 9/15$583
This Mytrip deal was found by Cheapflights users on 9/12. 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.
Tue 10/284:05 pmSTL - BFS
3 stops27h 35mMultiple Airlines
Tue 11/49:35 amBFS - STL
3 stops34h 20mMultiple Airlines
Deal found 9/12$1,739
This Mytrip deal was found by Cheapflights users on 9/14. 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 10/294:50 pmSTL - BFS
2 stops18h 20mMultiple Airlines
Wed 11/58:50 pmBFS - STL
3 stops47h 05mMultiple Airlines
Deal found 9/14$1,877

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 15, 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

Mon 9/29

1:26 pm-11:10 pm

2 stops27h 44m

Belfast Intl

Tue 10/7

6:45 am-10:04 pm

2 stops21h 19m

$583

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Tue 10/28

4:05 pm-12:40 am

3 stops27h 35m

Belfast Intl

Tue 11/4

9:35 am-1:55 pm

3 stops34h 20m

$1,739

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Wed 10/29

4:50 pm-4:10 pm

2 stops18h 20m

Belfast Intl

Wed 11/5

8:50 pm-1:55 pm

3 stops47h 05m

$1,877

Kansas CityBelfast

MCI - BFS

MCIBFS

Kansas City

Mon 2/16

1:44 pm-7:55 am

2 stops36h 11m

$434

Kansas CityBelfast

MCI - BFS

MCIBFS

Kansas City

Thu 2/12

1:45 pm-10:00 pm

3 stops50h 15m

$475

Kansas CityBelfast

MCI - BFS

MCIBFS

Kansas City

Fri 2/13

1:44 pm-8:55 am

2 stops37h 11m

$520

Kansas CityBelfast

MCI - BFS

MCIBFS

Kansas City

Tue 2/17

1:44 pm-6:50 pm

3 stops23h 06m

$631

Kansas CityBelfast

MCI - BFS

MCIBFS

Kansas City

Sun 2/15

4:25 pm-9:25 am

3 stops35h 00m

$632

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

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 15, 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.

  • Can I find deals for flights from Missouri to Belfast Intl that include hotel bookings?

    Yes. In addition to deals on Missouri to Belfast Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Missouri to Belfast Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Missouri to Belfast Intl.

  • Can I find deals for business class flights from Missouri to Belfast Intl?

    Yes. Cheapflights offers flight deals from Missouri to Belfast Intl 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 Missouri to Belfast Intl Airport?

    Currently, February is the cheapest month in which you can book a flight from Missouri to Belfast Intl Airport (average of $657). Flying from Missouri to Belfast Intl Airport in June is currently the most expensive (average of $1,189). 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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Alternative routes for Missouri to Belfast Intl

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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 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$674Average$832FlexibilityNo cancel feeOn-time71%

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