AirHint found the following cheapest return flights from Austin (AUS) to San Juan (SJU) in October 2025 (see full year).
Return flights
| 25 Oct - 28 Oct | United | ||
| 31 Oct - 03 Nov | Southwest Airlines | ||
| 16 Oct - 06 Nov | Frontier Airlines | ||
| 04 Oct - 11 Oct | Southwest Airlines | ||
| 14 Oct - 25 Oct | Southwest Airlines | ||
| 08 Oct - 13 Oct | Spirit Airlines |
Also check the deals for one-way flights from Austin to San Juan in October.
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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