Cheapest return flights from Austin to San Juan in May from $175

AirHint found the following cheapest return flights from Austin (AUS) to San Juan (SJU) in May 2026 (see full year).

Return flights

16 May - 19 May Spirit Airlines
09 May - 16 May Spirit Airlines
12 May - 16 May Spirit Airlines
11 May - 14 May Frontier Airlines
14 May - 18 May Frontier Airlines
07 May - 10 May Frontier Airlines
07 May - 11 May Spirit Airlines
11 May - 15 May Spirit Airlines
11 May - 18 May Spirit Airlines
07 May - 15 May Spirit Airlines
30 May - 04 Jun Spirit Airlines
26 May - 02 Jun Spirit Airlines
24 May - 04 Jun American Airlines
30 May - 18 Jun Spirit Airlines

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

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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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