Austin (AUS) to San Juan (SJU) flight deal from $245 USD in economy class

UAUnited Airlines

Round Trip•Economy

AUS

Austin-Bergstrom International Ai

Austin, United States

SJU

Luis Muñoz Marín International Airport

San Juan, Puerto Rico

$444 USD

-45%$245 USD

Verified Nov 30, 2025 at 4:31 AM

December 2025

Today

Mon

Tue

Wed

Thu

Fri

Sat

Sun

1$395 2$395 3$395 4$413 5$409 6$320 7$330 8$320 9$320 10$320 11$330 12$423 13$366 14$468 15$354 16$407 17$515 18$558 19$643 20$584 21$783 22$850 23$785 24$864 25$712 26$601 27$680 28$504 29$508 30$394 31$245 1$354 2$399 3$305 4$280

Limited Availability

17% of dates checked are available within 10% of the lowest price

Wednesday, December 31st, 2025

10 round-trip options

Returning

Mon, Jan 5, 2026•5 Day Trip

$610 USD

Google Flights

Returning

Tue, Jan 6, 2026•6 Day Trip

$554 USD

Google Flights

Returning

Wed, Jan 7, 2026•7 Day Trip

$541 USD

Google Flights

Returning

Thu, Jan 8, 2026•8 Day Trip

$399 USD

Google Flights

Returning

Fri, Jan 9, 2026•9 Day Trip

$376 USD

Google Flights

Returning

Sat, Jan 10, 2026•10 Day Trip

$399 USD

Google Flights

Returning

Sun, Jan 11, 2026•11 Day Trip

$373 USD

Google Flights

Returning

Mon, Jan 12, 2026•12 Day Trip

$354 USD

Google Flights

Returning

Tue, Jan 13, 2026•13 Day Trip

$285 USD

Google Flights

Returning

Wed, Jan 14, 2026•14 Day Trip

$245 USD

Google Flights