Cheapest return BOS–SNN flights, September

AirHint found the following cheapest return flights from Boston (BOS) to Shannon (SNN) in September 2026 (see full year).

Return flights

10 Sep - 13 Sep KLM
06 Sep - 16 Sep KLM
05 Sep - 19 Sep Delta
06 Sep - 16 Sep Aer Lingus direct
21 Sep - 26 Sep Aer Lingus
20 Sep - 26 Sep Aer Lingus
21 Sep - 26 Sep Aer Lingus direct
10 Sep - 13 Sep Aer Lingus direct

Also check the deals for one-way flights from Boston to Shannon in September.

Powered by

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.

Book a cheap hotel in Shannon

Cheap car rent in Shannon

Feel free to contact us with any feedback or request another flight research.