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

Return flights

25 Jun - 02 Jul	United
25 Jun - 03 Jul	United
30 Jun - 13 Jul	United	direct
26 Jun - 01 Jul	Lufthansa
30 Jun - 19 Jul	Spirit Airlines
30 Jun - 16 Jul	Spirit Airlines
30 Jun - 15 Jul	Spirit Airlines
30 Jun - 10 Jul	Spirit Airlines
24 Jun - 24 Jul	American Airlines
30 Jun - 11 Jul	Spirit Airlines
26 Jun - 30 Jun	Lufthansa
28 Jun - 30 Jun	United
27 Jun - 30 Jun	United	direct
26 Jun - 30 Jun	United	direct
24 Jun - 25 Jun	United	direct

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

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 Newark to San Jose in June from $308

Return flights