Cheapest return flights from Newark to San Jose in September from $166

AirHint found the following cheapest return flights from Newark (EWR) to San Jose (SJO) in September 2025 (see full year).

Return flights

24 Sep - 08 Oct Spirit Airlines
24 Sep - 01 Oct Spirit Airlines
24 Sep - 04 Oct Spirit Airlines
24 Sep - 07 Oct Spirit Airlines
30 Sep - 01 Oct Spirit Airlines
30 Sep - 04 Oct Spirit Airlines
30 Sep - 07 Oct Spirit Airlines
18 Sep - 24 Sep Spirit Airlines
23 Sep - 24 Sep Spirit Airlines
11 Sep - 01 Oct Spirit Airlines
30 Sep - 11 Oct Spirit Airlines
23 Sep - 04 Oct Spirit Airlines
13 Sep - 23 Sep Spirit Airlines
10 Sep - 19 Sep Spirit Airlines
16 Sep - 23 Sep Spirit Airlines
14 Sep - 24 Sep Spirit Airlines
14 Sep - 23 Sep Spirit Airlines
14 Sep - 19 Sep Spirit Airlines
14 Sep - 18 Sep Spirit Airlines
14 Sep - 22 Sep Spirit Airlines

Also check the deals for one-way flights from Newark to San Jose in September.

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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