San Juan (SJU) to St. Louis (STL) flight deal from $218 USD in economy class

AAAmerican Airlines

Round Trip•Economy

SJU

Luis Muñoz Marín International Airport

San Juan, Puerto Rico

STL

Lambert-Saint Louis International Airport

St. Louis, United States

$389 USD

-44%$218 USD

Verified Nov 27, 2025 at 7:18 PM

January 2026

Today

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29$390 30$325 31$232 1$595 2$887 3$1,164 4$820 5$440 6$441 7$440 8$297 9$348 10$540 11$515 12$225 13$250 14$225 15$225 16$225 17$225 18$400 19$348 20$225 21$225 22$225 23$225 24$225 25$400 26$225 27$225 28$225 29$225 30$225 31$225 1

Fair Availability

33% of dates checked are available within 10% of the lowest price

Tuesday, January 13th, 2026

10 round-trip options

Returning

Sun, Jan 18, 2026•5 Day Trip

$250 USD

Google Flights

Returning

Mon, Jan 19, 2026•6 Day Trip

$290 USD

Google Flights

Returning

Tue, Jan 20, 2026•7 Day Trip

$290 USD

Google Flights

Returning

Wed, Jan 21, 2026•8 Day Trip

$290 USD

Google Flights

Returning

Thu, Jan 22, 2026•9 Day Trip

$355 USD

Google Flights

Returning

Fri, Jan 23, 2026•10 Day Trip

$290 USD

Google Flights

Returning

Sat, Jan 24, 2026•11 Day Trip

$290 USD

Google Flights

Returning

Sun, Jan 25, 2026•12 Day Trip

$290 USD

Google Flights

Returning

Mon, Jan 26, 2026•13 Day Trip

$290 USD

Google Flights

Returning

Tue, Jan 27, 2026•14 Day Trip

$290 USD

Google Flights