AirHint found the following cheapest return flights from Austin (AUS) to San Juan (SJU)
in July 2025 (see full year ).
Return flights
11 Jul
- 18 Jul
Frontier Airlines
$ 218
24 Jul
- 01 Aug
Frontier Airlines
$ 220
24 Jul
- 31 Jul
Frontier Airlines
$ 221
17 Jul
- 25 Jul
Frontier Airlines
$ 224
20 Jul
- 25 Jul
Frontier Airlines
$ 233
10 Jul
- 17 Jul
Frontier Airlines
$ 240
10 Jul
- 14 Jul
Frontier Airlines
$ 241
11 Jul
- 14 Jul
Frontier Airlines
$ 247
21 Jul
- 28 Jul
Frontier Airlines
$ 261
17 Jul
- 20 Jul
Frontier Airlines
$ 261
15 Jul
- 18 Jul
United
$ 267
24 Jul
- 03 Aug
Frontier Airlines
$ 292
09 Jul
- 06 Aug
American Airlines
$ 320
31 Jul
- 06 Aug
Frontier Airlines
$ 352
05 Jul
- 02 Aug
United
$ 375
12 Jul
- 02 Aug
United
$ 392
30 Jul
- 06 Aug
jetBlue
$ 455
09 Jul
- 05 Aug
American Airlines
$ 460
Also check the deals for one-way flights from Austin to San Juan in July .
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.