Cheap flights from St. Louis to Northern Ireland from £427
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.
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 17 September 2025.
Round-trip from | £427 |
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Find flight deals from St. Louis to Northern Ireland
Cheapest flights from St. Louis to Northern IrelandExplore 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 17 September 2025.
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 17 September 2025.
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Use the filters below to find and compare flights from St. Louis to Northern Ireland that are best for you.
Fly from
Fly to
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
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
St. LouisBelfast
STL - BHD
STLBHD
Lambert-St Louis
Sun 1/3
16:00-21:00
2 stops23h 00m
Belfast City
Thu 5/3
06:30-20:39
2 stops20h 09m
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
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
Best time to book a flight from St. Louis to Northern Ireland
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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?
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