Cheapest return flights from Boston to San Juan in January from $171

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

Return flights

06 Jan - 05 Feb Frontier Airlines direct
23 Jan - 26 Jan Spirit Airlines direct
04 Jan - 09 Jan Spirit Airlines direct
24 Jan - 31 Jan Spirit Airlines direct
22 Jan - 26 Jan Spirit Airlines direct
23 Jan - 31 Jan Spirit Airlines direct
22 Jan - 01 Feb Spirit Airlines direct
24 Jan - 02 Feb Spirit Airlines direct
07 Jan - 09 Jan Spirit Airlines direct
07 Jan - 25 Jan Spirit Airlines direct
07 Jan - 22 Jan Spirit Airlines direct
07 Jan - 24 Jan Spirit Airlines direct
07 Jan - 26 Jan Spirit Airlines direct
11 Jan - 01 Feb Spirit Airlines direct
23 Jan - 02 Feb Spirit Airlines direct
23 Jan - 01 Feb Spirit Airlines direct
23 Jan - 05 Feb Spirit Airlines direct
24 Jan - 01 Feb Spirit Airlines direct
24 Jan - 05 Feb Spirit Airlines direct
22 Jan - 02 Feb Spirit Airlines direct

Also check the deals for one-way flights from Boston to San Juan in January.

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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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