Cheapest one-way flights from Austin to San Juan in January from $69

AirHint found the following cheapest one-way flights from Austin (AUS) to San Juan (SJU) in January 2026 (see full year).

One-Way flights

08 Jan Frontier Airlines
30 Jan Frontier Airlines
21 Jan Spirit Airlines
19 Jan Spirit Airlines
20 Jan Spirit Airlines
09 Jan Spirit Airlines
14 Jan Spirit Airlines
15 Jan jetBlue
06 Jan Spirit Airlines
05 Jan Spirit Airlines

Also check the deals for return flights from Austin to San Juan in January.

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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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