Cheapest return flights from Detroit to San Juan in January from $116

AirHint found the following cheapest return flights from Detroit (DTW) to San Juan (SJU) in January 2026 (see full year).

Return flights

24 Jan - 29 Jan Frontier Airlines
12 Jan - 15 Jan Frontier Airlines
19 Jan - 28 Jan Frontier Airlines
08 Jan - 12 Jan Frontier Airlines
27 Jan - 10 Feb Frontier Airlines
12 Jan - 16 Jan Frontier Airlines
01 Jan - 29 Jan Frontier Airlines
19 Jan - 26 Jan Frontier Airlines
19 Jan - 27 Jan Frontier Airlines
07 Jan - 15 Jan Spirit Airlines
31 Jan - 03 Feb Frontier Airlines
26 Jan - 30 Jan Frontier Airlines
27 Jan - 02 Feb Frontier Airlines
31 Jan - 08 Feb Frontier Airlines
28 Jan - 11 Feb Spirit Airlines
21 Jan - 11 Feb Spirit Airlines
20 Jan - 07 Feb Spirit Airlines
28 Jan - 07 Feb Spirit Airlines
28 Jan - 13 Feb Spirit Airlines
31 Jan - 10 Feb Spirit Airlines

Also check the deals for one-way flights from Detroit to San Juan in January.

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