AirHint found the following cheapest return flights from New Orleans (MSY) to San Juan (SJU) in September 2025 (see full year).

Return flights

08 Sep - 13 Sep	Spirit Airlines
18 Sep - 22 Sep	Southwest Airlines
26 Sep - 29 Sep	Southwest Airlines
26 Sep - 30 Sep	Southwest Airlines
19 Sep - 22 Sep	Southwest Airlines
04 Sep - 08 Sep	Spirit Airlines
10 Sep - 15 Sep	Spirit Airlines
18 Sep - 23 Sep	United
04 Sep - 06 Sep	Southwest Airlines
11 Sep - 15 Sep	Southwest Airlines
18 Sep - 07 Oct	Spirit Airlines
18 Sep - 06 Oct	Spirit Airlines
19 Sep - 07 Oct	Spirit Airlines
19 Sep - 06 Oct	Spirit Airlines

Also check the deals for one-way flights from New Orleans to San Juan in September.

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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Cheapest return flights from New Orleans to San Juan in September from 134€

Return flights