Cheapest return flights from St. Louis to San Juan in April from 144€

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 April 2025 (see full year).

Return flights

26 Apr - 30 Apr Frontier Airlines
02 Apr - 07 Apr Frontier Airlines
21 Apr - 26 Apr Frontier Airlines
07 Apr - 10 Apr Frontier Airlines
12 Apr - 15 Apr Frontier Airlines
03 Apr - 07 Apr Frontier Airlines
10 Apr - 15 Apr Frontier Airlines
05 Apr - 12 Apr Southwest Airlines
09 Apr - 13 Apr Frontier Airlines
11 Apr - 14 Apr Southwest Airlines

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

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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