AirHint found the following cheapest return flights from Newark (EWR) to San Jose (SJO) in March 2026 (see full year).

Return flights

01 Mar - 05 Mar	United	direct
14 Mar - 22 Mar	Volaris El Salvador
03 Mar - 19 Mar	United	direct
01 Mar - 03 Mar	Spirit Airlines
11 Mar - 16 Mar	United	direct
12 Mar - 15 Mar	Volaris El Salvador
07 Mar - 14 Mar	American Airlines
13 Mar - 21 Mar	Volaris
17 Mar - 31 Mar	Delta
31 Mar - 10 Apr	Delta
26 Mar - 07 Apr	Delta
26 Mar - 08 Apr	Delta
29 Mar - 08 Apr	Delta
13 Mar - 21 Mar	United	direct
26 Mar - 08 Apr	United	direct
29 Mar - 08 Apr	United	direct

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

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 March from $283

Return flights