Cheapest return flights from Austin to San Juan in October from $224

AirHint found the following cheapest return flights from Austin (AUS) to San Juan (SJU) in October 2025 (see full year).

Return flights

23 Oct - 26 Oct Southwest Airlines
07 Oct - 21 Oct United
09 Oct - 13 Oct American Airlines
31 Oct - 04 Nov Delta
13 Oct - 20 Oct Frontier Airlines
23 Oct - 30 Oct Spirit Airlines
27 Oct - 30 Oct Spirit Airlines
10 Oct - 14 Oct American Airlines
17 Oct - 30 Oct Spirit Airlines
17 Oct - 23 Oct Spirit Airlines
17 Oct - 26 Oct Spirit Airlines

Also check the deals for one-way flights from Austin to San Juan in October.

Skyscanner

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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