Cheapest return flights from St. Louis to San Juan in March from $203

Best time to book flights for St. Louis (STL) to San Juan (SJU) flights at AirHint

AirHint found the following cheapest return flights from St. Louis (STL) to San Juan (SJU) in March 2025 (see full year).

Return flights

27 Mar - 31 Mar Frontier Airlines
27 Mar - 29 Mar Frontier Airlines
29 Mar - 02 Apr Frontier Airlines
28 Mar - 30 Mar Frontier Airlines
22 Mar - 30 Mar Frontier Airlines
18 Mar - 25 Mar Frontier Airlines
15 Mar - 22 Mar Frontier Airlines
21 Mar - 23 Mar Frontier Airlines

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

Skyscanner

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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