AirHint found the following cheapest return flights from Seattle (SEA) to San Jose (SJO) in May 2026 (see full year).
Return flights
| 05 May - 10 May | Frontier Airlines | ||
| 02 May - 06 May | Frontier Airlines | ||
| 28 May - 04 Jun | Frontier Airlines | ||
| 01 May - 05 May | Volaris | ||
| 29 May - 09 Jun | Alaska Airlines |
Also check the deals for one-way flights from Seattle to San Jose in May.
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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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