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

Return flights

04 Mar - 11 Mar	jetBlue
01 Mar - 10 Mar	jetBlue
18 Mar - 25 Mar	United	direct
02 Mar - 09 Mar	United
03 Mar - 10 Mar	United
01 Mar - 05 Mar	United	direct
10 Mar - 17 Mar	United	direct
11 Mar - 18 Mar	United
24 Mar - 31 Mar	jetBlue
05 Mar - 12 Mar	United
21 Mar - 14 Apr	Arajet
26 Mar - 02 Apr	Volaris El Salvador
28 Mar - 02 Apr	jetBlue
28 Mar - 04 Apr	Air Canada
11 Mar - 03 Apr	Aeromexico

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 $249

Return flights