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

One-Way flights

30 Jun	Icelandair
29 Jun	Air Canada
28 Jun	Air Canada
27 Jun	Icelandair
26 Jun	United
28 Jun	Iberia For Level	direct
29 Jun	Iberia For Level	direct
26 Jun	Air France	direct
27 Jun	Vueling Airlines	direct

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

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 June from $345

One-Way flights