Cheapest return flights from Seattle to San Juan in July from $415
AirHint found the following cheapest return flights from Seattle (SEA) to San Juan (SJU) in July 2025 (see full year).
Return flights
| 20 Jul - 29 Jul | United | ||
| 14 Jul - 28 Jul | United | ||
| 02 Jul - 08 Jul | Southwest Airlines | ||
| 29 Jul - 04 Aug | Southwest Airlines | ||
| 28 Jul - 04 Aug | Spirit Airlines | ||
| 24 Jul - 28 Jul | jetBlue |
Also check the deals for one-way flights from Seattle to San Juan in July.
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.
