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Cheap flights from St. Louis to Northern Ireland from £504

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 19/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — BFS
14 Mar — 21 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from St. Louis to Northern Ireland

Enter your travel dates to find the best prices.

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 12 February 2026.

Wed 19/813:30
STL
-
BHD
2 stops18h 05m
British Airways
Wed 26/810:05
BHD
-
STL
2 stops19h 37m
British Airways
Deal found 9/2£504
Tue 18/821:35
STL
-
BHD
1 stop15h 20m
British Airways
Mon 24/815:20
BHD
-
STL
1 stop34h 10m
British Airways
Deal found 9/2£505
Sun 16/821:40
STL
-
BHD
1 stop16h 55m
British Airways
Mon 24/818:30
BHD
-
STL
1 stop31h 00m
British Airways
Deal found 9/2£513
Tue 18/806:06
STL
-
BHD
2 stops22h 39m
British Airways
Tue 25/809:40
BHD
-
STL
1 stop15h 50m
British Airways
Deal found 9/2£519
Tue 18/821:35
STL
-
BHD
1 stop11h 45m
British Airways
Wed 26/811:35
BHD
-
STL
2 stops18h 16m
British Airways
Deal found 9/2£523
Mon 9/1114:18
STL
-
BHD
2 stops24h 42m
Delta
Wed 18/1106:30
BHD
-
STL
2 stops23h 09m
Delta
Deal found 9/2£526
Wed 19/821:35
STL
-
BHD
1 stop16h 15m
British Airways
Tue 25/809:40
BHD
-
STL
1 stop15h 50m
British Airways
Deal found 9/2£535
Fri 21/821:35
STL
-
BHD
1 stop14h 35m
British Airways
Mon 24/819:35
BHD
-
STL
1 stop29h 55m
British Airways
Deal found 9/2£542
Mon 17/817:45
STL
-
BHD
2 stops17h 10m
Delta
Fri 28/809:50
BHD
-
STL
2 stops19h 47m
Delta
Deal found 9/2£550
Sat 28/316:05
STL
-
BFS
3 stops21h 35m
Multiple Airlines
Sat 4/408:20
BFS
-
STL
2 stops35h 05m
Multiple Airlines
Deal found 11/2£1,396
Thu 26/316:05
STL
-
BFS
2 stops16h 35m
Multiple Airlines
Thu 2/408:20
BFS
-
STL
3 stops20h 42m
Multiple Airlines
Deal found 9/2£1,943
Mon 23/316:05
STL
-
BFS
2 stops24h 35m
Multiple Airlines
Sat 28/319:25
BFS
-
STL
2 stops23h 00m
Multiple Airlines
Deal found 11/2£2,557

Find 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 12 February 2026.

Round-trip from

£707
British Airways
  • British Airways
  • 23/3-28/3
  • 4 total stops
  • 48h 08m total
  • St. Louis to Northern Ireland
Search Deals

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 12 February 2026.
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 - BHD

STLBHD

Lambert-St Louis

Mon 23/3

13:34-10:40

2 stops16h 06m

Belfast City

Sat 28/3

15:05-18:07

2 stops32h 02m

£707

St. LouisBelfast

STL - BHD

STLBHD

Lambert-St Louis

Wed 25/2

11:59-14:15

2 stops20h 16m

Belfast City

Sun 1/3

12:10-23:48

2 stops17h 38m

£797

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Sat 28/3

16:05-18:40

3 stops21h 35m

Belfast Intl

Sat 4/4

08:20-13:25

2 stops35h 05m

£1,396

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Thu 26/3

16:05-13:40

2 stops16h 35m

Belfast Intl

Thu 2/4

08:20-23:02

3 stops20h 42m

£1,943

St. LouisBelfast

STL - BFS

STLBFS

Lambert-St Louis

Mon 23/3

16:05-21:40

2 stops24h 35m

Belfast Intl

Sat 28/3

19:25-13:25

2 stops23h 00m

£2,557

Flights are sorted by cheapest return flights first.

Deals found on 11/2

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 16h 06m. There are 3893 mi between St. Louis and Northern Ireland.

  • 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.

See more FAQs

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When you search for this flight from St. Louis to Northern Ireland, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Millions of users choose and trust Cheapflights to book the best flight deals from St. Louis to Northern Ireland for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

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.

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

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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