Cheapest return DTW–SJU flights, July

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

Return flights

11 Jul - 25 Aug Frontier Airlines
10 Jul - 15 Jul Frontier Airlines
15 Jul - 22 Jul Frontier Airlines
10 Jul - 14 Jul Frontier Airlines
29 Jul - 05 Aug Frontier Airlines
25 Jul - 29 Jul Frontier Airlines
24 Jul - 28 Jul Frontier Airlines
16 Jul - 22 Jul Frontier Airlines
16 Jul - 23 Jul Frontier Airlines
09 Jul - 12 Jul Frontier Airlines
14 Jul - 22 Aug Frontier Airlines
08 Jul - 22 Aug Frontier Airlines
09 Jul - 14 Jul Frontier Airlines
15 Jul - 21 Jul Frontier Airlines
29 Jul - 05 Aug Delta direct
08 Jul - 22 Aug Delta direct
14 Jul - 22 Aug Delta direct

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

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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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