AirHint found the following cheapest one-way flights from Boston (BOS) to Barcelona (BCN) in August 2025 (see full year).

One-Way flights

05 Aug	Icelandair
17 Aug	Icelandair
03 Aug	Icelandair
18 Aug	Iberia For Level	direct
02 Aug	Iberia For Level	direct
02 Aug	Icelandair
05 Aug	Iberia For Level	direct
11 Aug	Iberia For Level	direct
10 Aug	Iberia For Level	direct
07 Aug	Iberia For Level	direct

Also check the deals for return flights from Boston to Barcelona in August.

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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Cheapest one-way flights from Boston to Barcelona in August from $173

One-Way flights