St. Louis (STL) to Liberia (LIR) cheap flight deal from $279 USD in economy class

UAUnited Airlines

Round Trip•Economy

STL

Lambert-Saint Louis International Airport

St. Louis, United States

LIR

Daniel Oduber Quirós International Airport

Liberia, Costa Rica

$523 USD

-47%$279 USD

Verified Sep 20, 2025 at 3:49 PM

October 2025

Today

Mon

Tue

Wed

Thu

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Sun

29$347 30$347 1$347 2$375 3$367 4$319 5$337 6$299 7$321 8$942 9$620 10$446 11$324 12$400 13$324 14$279 15$431 16$354 17$299 18$299 19$346 20$315 21$279 22$390 23$306 24$299 25$299 26$279 27$297 28$297 29$297 30$324 31$317 1 2

Extremely Rare Availability

3% of dates checked are available within 10% of the lowest price

Saturday, October 4th, 2025

10 round-trip options

Returning

Thu, Oct 9, 2025•5 Day Trip

$337 USD

Google Flights

Returning

Fri, Oct 10, 2025•6 Day Trip

$341 USD

Google Flights

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Sat, Oct 11, 2025•7 Day Trip

$319 USD

Google Flights

Returning

Sun, Oct 12, 2025•8 Day Trip

$511 USD

Google Flights

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Mon, Oct 13, 2025•9 Day Trip

$1,498 USD

Google Flights

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Tue, Oct 14, 2025•10 Day Trip

$718 USD

Google Flights

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Wed, Oct 15, 2025•11 Day Trip

$521 USD

Google Flights

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Thu, Oct 16, 2025•12 Day Trip

$668 USD

Google Flights

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Fri, Oct 17, 2025•13 Day Trip

$586 USD

Google Flights

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Sat, Oct 18, 2025•14 Day Trip

$341 USD

Google Flights