AirHint found the following cheapest return flights from St. Louis (STL) to Shannon (SNN) in September 2026 (see full year).
Return flights
| 08 Sep - 01 Oct | British Airways | ||
| 18 Sep - 01 Oct | British Airways | ||
| 14 Sep - 01 Oct | United | ||
| 26 Sep - 01 Oct | United | ||
| 24 Sep - 01 Oct | United |
Also check the deals for one-way flights from St. Louis to Shannon in September.
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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.
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