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Cheapest one-way flights from Seattle (SEA) to San Juan (SJU), August

Select a price to book. see full year.

Dates, airline, and price
Dates	Airline	Price
30 Aug	Southwest Airlines
07 Aug	Frontier Airlines
15 Aug	Frontier Airlines
11 Aug	Delta
10 Aug	Southwest Airlines
12 Aug	Southwest Airlines
03 Aug	Southwest Airlines

deals for return flights from Seattle to San Juan in August.

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Updated Jul 19, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

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Cheapest one-way flights from Seattle (SEA) to San Juan (SJU), August

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