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

Thursday, December 18th, 2025

10 round-trip options

Returning

Tue, Dec 23, 2025•5 Day Trip

$607 USD

Google Flights

Returning

Wed, Dec 24, 2025•6 Day Trip

$571 USD

Google Flights

Returning

Thu, Dec 25, 2025•7 Day Trip

$558 USD

Google Flights

Returning

Fri, Dec 26, 2025•8 Day Trip

$695 USD

Google Flights

Returning

Sat, Dec 27, 2025•9 Day Trip

$832 USD

Google Flights

Returning

Sun, Dec 28, 2025•10 Day Trip

$879 USD

Google Flights

Returning

Mon, Dec 29, 2025•11 Day Trip

$828 USD

Google Flights

Returning

Tue, Dec 30, 2025•12 Day Trip

$828 USD

Google Flights

Returning

Wed, Dec 31, 2025•13 Day Trip

$832 USD

Google Flights

Returning

Thu, Jan 1, 2026•14 Day Trip

$864 USD

Google Flights