$39 Cheap Flights from Ontario (ONT) to Oakland (OAK)

View $39 flight on Thu, May 15, 2025Opens in a new window

Popular airlines from Los Angeles - Ontario Intl. Airport (ONT) to Oakland Intl. Airport (OAK)

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Find available prices by choosing your travel dates.

Cheap Flights from Ontario to Oakland (ONT-OAK)

Prices were available within the past 7 days and start at $39 for one-way flights and $77 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Thu, May 15 - Thu, May 22
ONT
Ontario
OAK
Oakland
$77 Roundtrip, just found
$77
Roundtrip
just found
Select Southwest Airlines flight, departing Thu, May 15 from Ontario to Oakland, returning Thu, May 22, priced at $77 just found
Southwest Airlines
Wed, May 28 - Mon, Jun 2
ONT
Ontario
OAK
Oakland
$87 Roundtrip, just found
$87
Roundtrip
just found
Select Southwest Airlines flight, departing Wed, May 28 from Ontario to Oakland, returning Mon, Jun 2, priced at $87 just found
Southwest Airlines
Wed, Jul 2 - Mon, Jul 7
ONT
Ontario
OAK
Oakland
$92 Roundtrip, found 7 hours ago
$92
Roundtrip
found 7 hours ago
Select Southwest Airlines flight, departing Wed, Jul 2 from Ontario to Oakland, returning Mon, Jul 7, priced at $92 found 7 hours ago
Southwest Airlines
Thu, Jun 12 - Wed, Sep 24
ONT
Ontario
OAK
Oakland
$97 Roundtrip, just found
$97
Roundtrip
just found
Select Southwest Airlines flight, departing Thu, Jun 12 from Ontario to Oakland, returning Wed, Sep 24, priced at $97 just found
Southwest Airlines
Mon, Sep 15 - Wed, Sep 17
ONT
Ontario
OAK
Oakland
$102 Roundtrip, found 1 day ago
$102
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Mon, Sep 15 from Ontario to Oakland, returning Wed, Sep 17, priced at $102 found 1 day ago
Southwest Airlines
Mon, May 19 - Wed, May 21
ONT
Ontario
OAK
Oakland
$107 Roundtrip, found 2 days ago
$107
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Mon, May 19 from Ontario to Oakland, returning Wed, May 21, priced at $107 found 2 days ago
Southwest Airlines
Thu, May 15 - Thu, May 22
ONT
Ontario
OAK
Oakland
$114 Roundtrip, just found
$114
Roundtrip
just found
Select Southwest Airlines flight, departing Thu, May 15 from Ontario to Oakland, returning Thu, May 22, priced at $114 just found
Alaska Airlines
Tue, May 20 - Tue, May 27
ONT
Ontario
OAK
Oakland
$263 Roundtrip, found 1 day ago
$263
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Tue, May 20 from Ontario to Oakland, returning Tue, May 27, priced at $263 found 1 day ago
Hawaiian Airlines
Tue, May 20 - Wed, May 21
ONT
Ontario
OAK
Oakland
$263 Roundtrip, found 6 hours ago
$263
Roundtrip
found 6 hours ago
Select Hawaiian Airlines flight, departing Tue, May 20 from Ontario to Oakland, returning Wed, May 21, priced at $263 found 6 hours ago
Delta
Sat, Jun 14 - Sat, Sep 27
ONT
Ontario
OAK
Oakland
$405 Roundtrip, just found
$405
Roundtrip
just found
Select Delta flight, departing Sat, Jun 14 from Ontario to Oakland, returning Sat, Sep 27, priced at $405 just found

Frequently asked questions

How much does a flight from Los Angeles - Ontario Intl. Airport (ONT) to Oakland Intl. Airport (OAK) cost?
Cheap round-trip flights from Los Angeles - Ontario Intl. Airport (ONT) to Oakland Intl. Airport (OAK) start at $73. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Southwest Airlines and Spirit Airlines flight leaving ONT on May 7 2025 and touching down at OAK. The price was last updated on April 20 2025 and has not changed since.
What is the cheapest month to fly from ONT to OAK?
The cheapest flights from ONT to OAK are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Los Angeles - Ontario Intl. Airport (ONT) to Oakland Intl. Airport (OAK)?
You can fly directly from Los Angeles - Ontario Intl. Airport (ONT) to Oakland Intl. Airport (OAK) on a Southwest Airlines flight.
What is the cheapest airline that flies from ONT to OAK?
Currently, the cheapest carrier operating one-way flights from ONT to OAK is Southwest Airlines. You can take off on this route from $49. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from ONT on June 18 2025. Prices were last updated on April 20 2025 and have not changed since.
How many flights per day from Los Angeles - Ontario Intl. Airport (ONT) to Oakland Intl. Airport (OAK)?
With, on average, 3 nonstop flights departing from Los Angeles - Ontario Intl. Airport (ONT) to Oakland Intl. Airport (OAK) every day, you’ll be soaring through the skies in no time.
What are the most popular departure times for flights from Los Angeles - Ontario Intl. Airport (ONT) to Oakland Intl. Airport (OAK)?
More passengers fly between ONT and OAK at 6 AM than at any other time of day. Looking for a quieter experience? Pick a flight outside the busiest times and you’re likely to save on your ticket as well.
What day of the week has the most flights from ONT to OAK?
If you depart on a Friday, you’ll get the widest range of choices for flights from Los Angeles - Ontario Intl. Airport (ONT) to Oakland Intl. Airport (OAK).
What is the earliest flight from Los Angeles - Ontario Intl. Airport (ONT) to Oakland Intl. Airport (OAK)?
Los Angeles - Ontario Intl. Airport (ONT)’s earliest flight to Oakland Intl. Airport (OAK) is at approximately 6:00AM UTC-8. With a travel duration of 1h 25m, you’ll land at around 7:25AM UTC-8.
How long does it take to fly from Los Angeles - Ontario Intl. Airport (ONT) to Oakland Intl. Airport (OAK)?
Flights from ONT to OAK have an average travel time of 1 hour and 23 minutes. The distance between the two airports is 360 mi.
What is the best time to fly from Los Angeles - Ontario Intl. Airport (ONT) to Oakland Intl. Airport (OAK)?
To arrive at Oakland Intl. Airport (OAK) without delays, choose a flight that takes off from Los Angeles - Ontario Intl. Airport (ONT) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
What airports do you fly into for Oakland from Los Angeles - Ontario Intl. Airport (ONT)?
Los Angeles - Ontario Intl. Airport (ONT) offers direct flights to Oakland. These are some of the airports you can fly to without layovers:

  • San Francisco Intl. Airport (SFO)
  • Norman Y. Mineta San Jose Intl. Airport (SJC)
  • Oakland Intl. Airport (OAK)

Is it cheaper to buy a plane ticket from Los Angeles - Ontario Intl. Airport (ONT) to Oakland Intl. Airport (OAK) last-minute?
Booking your ticket from ONT to OAK right before your journey is usually more expensive. However, if you’re flexible with your itinerary, you could snag a cheap last-minute fare.
Is it cheaper to book an ONT to OAK flight and hotel package?
Opting for an ONT to OAK flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip in one place. Choose from our wide range of hotels and then add car rentals, activities and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Los Angeles - Ontario Intl. Airport (ONT) to Oakland Intl. Airport (OAK)?
If you booked your ONT to OAK flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you’d like more information.
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