Cheap flights from St. Louis to Northern Ireland from £430

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 — BFS
15 Oct — 22 Oct1
1 adult
1 adult, Economy

Cheap flight deals from St. Louis to Northern Ireland

Keep the following information in mind while searching for St. Louis to Northern Ireland flight deals. Data was last updated 15 September 2025.

Round-trip from

£430
29/9-7/10
  • 29/9-7/10
  • 4 total stops
  • 49h 03m total
  • St. Louis to Northern Ireland

Find flight deals from St. Louis to Northern Ireland

Cheapest flights from St. Louis to Northern Ireland
Explore the most affordable flight options available from St. Louis to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 September 2025.

Mon 29/913:26STL - BFS
2 stops27h 44mMultiple Airlines
Tue 7/1006:45BFS - STL
2 stops21h 19mMultiple Airlines
Deal found 15/9£430
Mon 29/919:59STL - BHD
2 stops15h 31mAmerican Airlines
Tue 7/1009:35BHD - STL
2 stops17h 54mAmerican Airlines
Deal found 15/9£520
Tue 28/1016:05STL - BFS
3 stops27h 35mMultiple Airlines
Tue 4/1109:35BFS - STL
3 stops34h 20mMultiple Airlines
Deal found 12/9£1,282
Wed 29/1016:50STL - BFS
2 stops18h 20mMultiple Airlines
Wed 5/1120:50BFS - STL
3 stops47h 05mMultiple Airlines
Deal found 14/9£1,384
Mon 29/913:30STL - BHD
3 stops20h 55mMultiple Airlines
Tue 7/1017:55BHD - STL
3 stops31h 43mMultiple Airlines
Deal found 15/9£1,498
Fri 26/913:03STL - BHD
2 stops23h 12mMultiple Airlines
Fri 3/1006:35BHD - STL
2 stops20h 31mMultiple Airlines
Deal found 12/9£2,125
Fri 26/1213:59STL - BHD
2 stops14h 31mBritish Airways
Fri 9/106:45BHD - STL
2 stops19h 38mBritish Airways
Deal found 13/9£2,643
Sat 27/1218:35STL - BHD
2 stops16h 10mBritish Airways
Fri 9/111:30BHD - STL
2 stops18h 02mBritish Airways
Deal found 13/9£2,695
Thu 25/1214:00STL - BHD
2 stops14h 20mMultiple Airlines
Fri 9/106:45BHD - STL
2 stops19h 38mMultiple Airlines
Deal found 13/9£2,703
Sun 28/1210:01STL - BHD
2 stops18h 19mAmerican Airlines
Fri 9/106:45BHD - STL
2 stops18h 22mAmerican Airlines
Deal found 13/9£2,731
Wed 24/1217:11STL - BHD
2 stops35h 09mAmerican Airlines
Fri 9/111:30BHD - STL
2 stops18h 02mAmerican Airlines
Deal found 13/9£2,736

Cheapflights Fare Finder

 
Customise your flight search to find flights from St. Louis to Northern Ireland 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 15 September 2025.
Use the filters below to find and compare flights from St. Louis to Northern Ireland that are best for you.

Fly from

St. Louis

Fly to

Northern Ireland

Route

Depart

Return

Price

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Mon 29/9

13:26-23:10

2 stops27h 44m

Belfast Intl

Tue 7/10

06:45-22:04

2 stops21h 19m

£430

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 29/9

19:59-17:30

2 stops15h 31m

Belfast City

Tue 7/10

09:35-21:29

2 stops17h 54m

£520

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sun 1/3

11:51-16:50

2 stops22h 59m

Belfast City

Thu 5/3

06:30-16:50

2 stops16h 20m

£591

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sun 1/3

10:45-21:00

2 stops28h 15m

Belfast City

Thu 5/3

06:30-16:50

2 stops16h 20m

£591

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Tue 28/10

16:05-00:40

3 stops27h 35m

Belfast Intl

Tue 4/11

09:35-13:55

3 stops34h 20m

£1,282

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Wed 29/10

16:50-16:10

2 stops18h 20m

Belfast Intl

Wed 5/11

20:50-13:55

3 stops47h 05m

£1,384

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Mon 29/9

13:30-16:25

3 stops20h 55m

Belfast City

Tue 7/10

17:55-19:38

3 stops31h 43m

£1,498

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Fri 26/9

13:03-18:15

2 stops23h 12m

Belfast City

Fri 3/10

06:35-21:06

2 stops20h 31m

£2,125

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Fri 26/12

13:59-10:30

2 stops14h 31m

Belfast City

Fri 9/1

06:45-20:23

2 stops19h 38m

£2,643

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Sat 27/12

18:35-16:45

2 stops16h 10m

Belfast City

Fri 9/1

11:30-23:32

2 stops18h 02m

£2,695

Flights are sorted by cheapest return flights first.

Deals found on 15/9

Showing 1-10 of 13 results
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Best time to book a flight from St. Louis to Northern Ireland

Have a flexible travel schedule? Discover the best time to fly to Northern Ireland 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 Northern Ireland
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 Northern Ireland. 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 Northern Ireland?

    Located just 12.7 mi from the city center, Lambert-St Louis (STL) is the airport most travelers will use when flying to Northern Ireland from St. Louis.

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

    Departing from St. Louis to Northern Ireland will take you 15h 31m. There are 3893 mi between St. Louis and Northern Ireland. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Northern Ireland 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 Northern Ireland?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Northern Ireland (average of £67). Flying from St. Louis to Northern Ireland 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.

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Certainly. Search results for flights to Northern Ireland from St. Louis shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Northern Ireland from St. Louis today and book when prices fit your budget.

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