Cheapest return flights from Chicago to San Juan in March from $218

AirHint found the following cheapest return flights from Chicago (MDW) to San Juan (SJU) in March 2026 (see full year).

Return flights

07 Mar - 11 Mar Frontier Airlines
05 Mar - 09 Mar Frontier Airlines
05 Mar - 10 Mar Frontier Airlines
10 Mar - 17 Mar Frontier Airlines
10 Mar - 18 Mar Frontier Airlines
11 Mar - 18 Mar Frontier Airlines
01 Mar - 06 Mar Frontier Airlines
06 Mar - 10 Mar Frontier Airlines
18 Mar - 24 Mar Frontier Airlines
17 Mar - 24 Mar Frontier Airlines
27 Mar - 01 Apr Frontier Airlines
30 Mar - 04 Apr Frontier Airlines
27 Mar - 06 Apr Frontier Airlines
25 Mar - 02 Apr Frontier Airlines
31 Mar - 05 Apr Frontier Airlines
27 Mar - 04 Apr Frontier Airlines
30 Mar - 05 Apr Frontier Airlines
29 Mar - 03 Apr Delta
28 Mar - 04 Apr Frontier Airlines
27 Mar - 05 Apr Frontier Airlines

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

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