AirHint found the following cheapest return flights from Shannon (SNN) to Boston (BOS) in July 2025 (see full year).

Return flights

29 Jul - 05 Aug	Ryanair
31 Jul - 04 Aug	Ryanair
31 Jul - 05 Aug	Ryanair
16 Jul - 21 Jul	Ryanair
28 Jul - 05 Aug	Ryanair
16 Jul - 30 Jul	Ryanair
10 Jul - 28 Jul	Ryanair
24 Jul - 29 Jul	Delta
15 Jul - 24 Jul	Delta
21 Jul - 27 Jul	Air France
24 Jul - 28 Jul	Ryanair
26 Jul - 03 Aug	Delta
15 Jul - 11 Aug	Delta
24 Jul - 31 Jul	Ryanair
14 Jul - 20 Jul	Aer Lingus
08 Jul - 30 Jul	Ryanair
26 Jul - 05 Aug	United
30 Jul - 05 Aug	United
06 Jul - 07 Aug	United
23 Jul - 05 Aug	KLM

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

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 Boston

Cheap car rent in Boston

Cheapest return flights from Shannon to Boston in July from $684

Return flights