How to find the cheapest flight from
St Louis (STL) to Shannon (SNN)
What is the cheapest day to fly round-trip from St Louis to Shannon?
Users have found that leaving on a Tuesday can be a cost-effective option. It’s possible to save up to 24% on your flight compared to booking on days when demand is much higher.
Related info for your journey
Useful info, stats and facts about St Louis to Shannon flights.
Alternative routes for St Louis to Shannon
Destination information for Shannon
Things to know before you go. Useful info for your trip from St Louis to Shannon