Cheapest return flights from Newark to San Jose in September from $298

Best time to book flights for Newark (EWR) to San Jose (SJO) flights at AirHint

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

Return flights

10 Sep - 17 Sep United direct
05 Sep - 17 Sep United direct
03 Sep - 17 Sep United direct
04 Sep - 18 Sep United direct
03 Sep - 10 Sep United
16 Sep - 30 Sep American Airlines
12 Sep - 14 Sep American Airlines
05 Sep - 07 Sep American Airlines
12 Sep - 15 Sep American Airlines
14 Sep - 21 Sep American Airlines
15 Sep - 06 Oct United
30 Sep - 02 Oct Spirit Airlines
30 Sep - 02 Oct United direct
20 Sep - 03 Oct Spirit Airlines
20 Sep - 02 Oct 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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