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Cheap flights from St. Louis to Belfast from £429

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 29/9. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BHD
16 loka — 23 loka1
1 adult
1 adult, Economy

Cheap 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 16 syyskuu 2025.

Round-trip from

£429
29/9-7/10
  • 29/9-7/10
  • 4 total stops
  • 49h 03m total
  • St. Louis to Belfast
Search Deals

Find flight deals from St. Louis to Belfast

Cheapest flights from St. Louis to Belfast
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 16 syyskuu 2025.

ma 29/913:26STL - BFS
2 stops27h 44mMultiple Airlines
ti 7/1006:45BFS - STL
2 stops21h 19mMultiple Airlines
Deal found 15/9£429
ma 29/919:59STL - BHD
2 stops15h 31mAmerican Airlines
ti 7/1009:35BHD - STL
2 stops17h 54mAmerican Airlines
Deal found 15/9£520
ke 29/1016:50STL - BFS
2 stops18h 20mMultiple Airlines
ke 5/1120:50BFS - STL
3 stops47h 05mMultiple Airlines
Deal found 14/9£1,381
ma 29/913:30STL - BHD
3 stops20h 55mMultiple Airlines
ti 7/1017:55BHD - STL
3 stops31h 43mMultiple Airlines
Deal found 15/9£1,495

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 16 syyskuu 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 - BFS

STLBFS

Lambert-St Louis

ma 29/9

13:26-23:10

2 stops27h 44m

Belfast Intl

ti 7/10

06:45-22:04

2 stops21h 19m

£429

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

ma 29/9

19:59-17:30

2 stops15h 31m

Belfast City

ti 7/10

09:35-21:29

2 stops17h 54m

£520

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

su 1/3

11:51-16:50

2 stops22h 59m

Belfast City

to 5/3

06:30-16:50

2 stops16h 20m

£589

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

su 1/3

10:45-21:00

2 stops28h 15m

Belfast City

to 5/3

06:30-16:50

2 stops16h 20m

£589

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

ke 29/10

16:50-16:10

2 stops18h 20m

Belfast Intl

ke 5/11

20:50-13:55

3 stops47h 05m

£1,381

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

ma 29/9

13:30-16:25

3 stops20h 55m

Belfast City

ti 7/10

17:55-19:38

3 stops31h 43m

£1,495

Flights are sorted by cheapest return flights first.

Deals found on 15/9

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 return 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
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Belfast. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Louis to Belfast?

    Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Belfast. On average, Lambert-St Louis has 0 outbound flights to Belfast per day from 0 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

  • How long is the flight from St. Louis to Belfast?

    For as low as £520, American Airlines can have you in Belfast from St. Louis in 15h 31m. Airlines will cover a distance of 3893 mi. Both multi-stop and direct flights can be found to your destination and back.

  • Can I find deals for flights from St. Louis to Belfast that include hotel bookings?

    Yes. In addition to deals on St. Louis to Belfast flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Belfast?

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

  • Can I find deals for business class flights from St. Louis to Belfast?

    Yes. Cheapflights offers flight deals from St. Louis to Belfast 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 St. Louis to Belfast?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Belfast (average of £67). Flying from St. Louis to Belfast in July is currently the most expensive (average of £90). 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 St. Louis to Belfast

See prices for flight routes from nearby airports that may be better suited for you.
Kansas City to Belfast City flights

Fly with Cheapflights

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How does Cheapflights help users find flights from St. Louis to Belfast?

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Why should you use Cheapflights to find cheap flight tickets from St. Louis to Belfast?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from St. Louis to Belfast.

Can Cheapflights find flights from St. Louis to Belfast with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from St. Louis to Belfast, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from St. Louis to Belfast become cheaper?

Of course! You can now track prices for flights from St. Louis to Belfast and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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