Cheap flights to California from Ontario

Round trips from Ontario from $66. Cheapest dates, deal ratings and where to book.

• San Francisco: $66, 2026-12-09 to 2026-12-12
• Sacramento: $151, 2026-11-19 to 2026-11-23
• San Diego: $165, 2026-11-05 to 2026-11-22
• Santa Rosa: $225, 2027-02-01 to 2027-02-04
• Monterey: $354, 2026-10-08 to 2026-10-10

Nearby

• Nevada
• Utah
• Oregon
• Arizona
• Idaho
• Washington
• New Mexico
• Wyoming