Cheapest return flights from St. Louis to San Jose in March from $382

AirHint found the following cheapest return flights from St. Louis (STL) to San Jose (SJO) in March 2026 (see full year).

Return flights

05 Mar - 12 Mar Frontier Airlines
19 Mar - 31 Mar Frontier Airlines
26 Mar - 02 Apr American Airlines
16 Mar - 23 Mar Frontier Airlines
28 Mar - 01 Apr Frontier Airlines
14 Mar - 21 Mar Frontier Airlines
20 Mar - 28 Mar Southwest Airlines

Also check the deals for one-way flights from St. Louis to San Jose in March.

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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.

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