AirHint found the following cheapest return flights from Boston (BOS) to Shannon (SNN) in August 2026 (see full year).
Return flights
| 26 Aug - 03 Sep | Air France | ||
| 22 Aug - 27 Aug | United | ||
| 14 Aug - 19 Aug | Air France | ||
| 26 Aug - 03 Sep | Aer Lingus | direct | |
| 22 Aug - 27 Aug | Aer Lingus | direct | |
| 14 Aug - 19 Aug | Aer Lingus | direct |
Also check the deals for one-way flights from Boston to Shannon in August.
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