AirHint found the following cheapest return flights from Seattle (SEA) to San Juan (SJU) in January 2026 (see full year).
Return flights
| 24 Jan - 31 Jan | American Airlines | ||
| 20 Jan - 29 Jan | United | ||
| 27 Jan - 03 Feb | United | ||
| 06 Jan - 22 Jan | United | ||
| 30 Jan - 03 Feb | United | ||
| 07 Jan - 21 Jan | United |
Also check the deals for one-way flights from Seattle 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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