Earn point on your loyalty program!arrow arc left

Cheap flights from St Louis (STL) to Shannon (SNN)

Know your dates, get live prices in seconds
airplane logo

pin logo

calendar
Departure
calendar backward
Return
airplane logo
1 Adults (11+)
0 Children (2~11)
0 Infants (0~2)
Save up to 31%
Book Flight + Hotel at the same time

How to find the cheapest flight from St Louis (STL) to Shannon (SNN)

How to find the cheapest flight from St Louis (STL) to Shannon (SNN)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from St Louis (STL) to Shannon (SNN)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from St Louis (STL) to Shannon (SNN)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.

Cheap flights from St Louis to Shannon in December 2025 , January 2026

31 Dec - 27 Jan $ 1,101.00
STL
St Louis
Frontier Airlines
2 STOPS
SNN
Shannon
SNN
Shannon
Frontier Airlines
3 STOPS
STL
St Louis
Pick dates
31 Dec - 28 Jan $ 1,106.00
STL
St Louis
Frontier Airlines
2 STOPS
SNN
Shannon
SNN
Shannon
Frontier Airlines
3 STOPS
STL
St Louis
Pick dates
31 Dec - 28 Jan $ 1,121.00
STL
St Louis
Lufthansa
2 STOPS
SNN
Shannon
SNN
Shannon
Lufthansa
2 STOPS
STL
St Louis
Pick dates

Last minute flights from St Louis to Shannon

30 Dec - 02 Jan $ 1,963.00
STL
St Louis
Frontier Airlines
2 STOPS
SNN
Shannon
SNN
Shannon
Frontier Airlines
3 STOPS
STL
St Louis
Pick dates
30 Dec - 02 Jan $ 1,978.00
STL
St Louis
Frontier Airlines
2 STOPS
SNN
Shannon
SNN
Shannon
Frontier Airlines
3 STOPS
STL
St Louis
Pick dates
30 Dec - 01 Jan $ 2,230.00
STL
St Louis
Air France
2 STOPS
SNN
Shannon
SNN
Shannon
Air France
2 STOPS
STL
St Louis
Pick dates

One-way flights to Shannon from St Louis

3:50 PM - 3:15 PM
Aer Lingus
2 Stops
18h 55m
STL - SNN
$ 540
Kiwi
Pick dates
2:50 PM - 10:00 AM
Aer Lingus
2 Stops
14h 40m
STL - SNN
$ 1,020
Kiwi
Pick dates
3:10 PM - 10:00 AM
Aer Lingus
2 Stops
14h 20m
STL - SNN
$ 4,957
Kiwi
Pick dates

How to find the cheapest flight from St Louis (STL) to Shannon (SNN)

Related info for your journey
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from St Louis (STL) to Shannon (SNN)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from St Louis (STL) to Shannon (SNN)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.