AirHint found the following cheapest return flights from San Juan (SJU) to Boston (BOS) in June 2026 (see full year).

Return flights

27 Jun - 30 Jun	Delta	direct
24 Jun - 28 Jun	Spirit Airlines
29 Jun - 18 Jul	Spirit Airlines	direct
18 Jun - 23 Jun	Spirit Airlines
24 Jun - 28 Jun	Delta	direct
18 Jun - 23 Jun	Spirit Airlines	direct
28 Jun - 18 Jul	Spirit Airlines	direct
24 Jun - 26 Jun	Spirit Airlines
18 Jun - 26 Jun	Spirit Airlines
18 Jun - 20 Jun	Spirit Airlines
18 Jun - 26 Jun	Spirit Airlines	direct
24 Jun - 26 Jun	Spirit Airlines	direct

Also check the deals for one-way flights from San Juan to Boston 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 return flights from San Juan to Boston in June from $413

Return flights