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Get United's best fares today on flights from Oakland to Ontario

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Low fare calendar for flights from Oakland (OAK) to Ontario (ONT)

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Lowest PriceToday
*Prices have been available for round trips within the last 48 hours and may not be currently available. Fares listed may be Basic Economy, which is our most restrictive fare option and subject to additional restrictions. Additional baggage charges and fees for other optional service may apply. Other terms and conditions may apply.

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Weather in Ontario

Thursday broken clouds
61°F 12/05/19
Friday overcast clouds
62°F 12/06/19
Saturday moderate rain
59°F 12/07/19
Sunday moderate rain
61°F 12/08/19
Monday sky is clear
59°F 12/09/19
Tuesday scattered clouds
61°F 12/10/19
Wednesday overcast clouds
62°F 12/11/19
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