Cheap flights from Ontario to Oakland

One-way fares from $72 · ONT → OAK · prices found by travellers in the last 48 hours

Compare all dates Oakland → Ontario
Cheapest fare
$72

Southwest Airlines · Mon, Dec 7

Cheapest month
December

from $72

Direct flights
Yes

Southwest Airlines

Flight time
1h 15m

590 km

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Cheapest month to fly from Ontario to Oakland

Lowest one-way fare per person in each month. Choose a month to see every date.

  1. November 2026 $85
  2. December 2026 Cheapest $72
  3. January 2027 $131
  4. February 2027 $84
  5. June 2027 $186
  6. July 2027 $211
  7. August 2027 $415

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Where to stay, what to do and getting around, from our travel partners.

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Things to do

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Getting around

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About flights from Ontario to Oakland

Ontario (ONT) and Oakland (OAK) are about 590 km apart. Direct flights take around 1h 15m, and recent direct fares were with Southwest Airlines. Over the next few months, one-way fares start from $72, and December 2026 is currently the cheapest month to fly.

These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.

Frequently asked questions

How much is a flight from Ontario to Oakland?

The cheapest one-way fare we've seen recently is $72 with Southwest Airlines, departing Monday, December 7, 2026. Over the coming months, the lowest fare in each month ranges from $72 to $415.

What is the cheapest month to fly from Ontario to Oakland?

December 2026 currently has the lowest fares, from $72 one way.

Are there direct flights from Ontario to Oakland?

Yes. Recent direct fares were with Southwest Airlines.

How long is the flight from Ontario to Oakland?

A direct flight takes about 1h 15m. Ontario and Oakland are around 590 km apart.

Which airlines fly from Ontario to Oakland?

Recent fares on this route were with Southwest Airlines and Alaska Airlines.

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