Cheapest return flights from Belfast to Boston in August from $618

AirHint found the following cheapest return flights from Belfast (BFS) to Boston (BOS) in August 2025 (see full year).

Return flights

31 Aug - 09 Sep Delta
06 Aug - 11 Aug Delta
04 Aug - 20 Aug KLM
22 Aug - 29 Aug Ryanair
03 Aug - 17 Aug Ryanair
01 Aug - 09 Aug Delta

Also check the deals for one-way flights from Belfast to Boston in August.

Skyscanner

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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