AirHint found the following cheapest return flights from Seattle (SEA) to San Juan (SJU) in February 2026 (see full year).

Return flights

03 Feb - 10 Feb	American Airlines
02 Feb - 10 Feb	American Airlines
06 Feb - 14 Feb	American Airlines
02 Feb - 17 Feb	American Airlines
09 Feb - 17 Feb	American Airlines
10 Feb - 17 Feb	American Airlines
09 Feb - 16 Feb	American Airlines
09 Feb - 21 Feb	American Airlines
11 Feb - 21 Feb	American Airlines
14 Feb - 21 Feb	Alaska Airlines

Also check the deals for one-way flights from Seattle to San Juan in February.

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 Seattle to San Juan in February from $377

Return flights