ONT - OAK

$82 Find Cheap Flights from Ontario to Oakland

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Oakland departing on 2/11. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Oakland

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Oakland, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Oakland, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$163
Overall average: $278
Southwest
Tue 2/10Wed 2/11
ONT - OAK • Non-stop
Cheapest one-way
$82
Typical prices: $66-$322
Southwest
Wed 2/11
ONT - OAK • Non-stop
Our travelers' advice
AI-powered summary based on content written by travel experts. AI can make mistakes.
ONT offers streamlined security with short wait times.
For a quick trip to SF, BART trains from OAK are ideal.
Expert advice
Expert advice
Expert advice
Expert advice
Video guide: How to find cheap flights to Oakland
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Top airlines
Southwest
Cheapest • from $163 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 56% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
September
Cheapest • 27% price drop
March
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Oakland!
Flight Deals
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Flight Deals

Cheap Flights from Ontario to Oakland (ONT-OAK)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Oakland that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Oakland

Tue, Feb 10 - Wed, Feb 11
Southwest Logo
7:20 am - 8:45 am
ONT
-
OAK
1h 25mnonstop
Southwest Logo
2:45 pm - 4:05 pm
OAK
-
ONT
1h 20mnonstop
$163Southwest
Tue, Feb 10 - Wed, Feb 11
Southwest Logo
5:55 am - 12:35 pm
ONT
-
OAK
6h 40m1 stop
Southwest Logo
1:35 pm - 2:55 pm
OAK
-
ONT
1h 20mnonstop
$173Southwest
Tue, Feb 10 - Wed, Feb 11
Southwest Logo
5:50 pm - 7:15 pm
ONT
-
OAK
1h 25mnonstop
Southwest Logo
3:30 pm - 9:05 pm
OAK
-
ONT
5h 35m2 stops
$178Southwest
Wed, Feb 18 - Tue, Feb 24
Alaska Airlines Logo
6:14 am - 4:37 pm
ONT
-
OAK
10h 23m1 stop
Alaska Airlines Logo
6:15 am - 3:08 pm
OAK
-
ONT
8h 53m1 stop
$205Alaska Airlines
Wed, Feb 11 - Fri, Feb 13
Southwest Logo
7:20 am - 8:45 am
ONT
-
OAK
1h 25mnonstop
Southwest Logo
6:00 am - 7:20 am
OAK
-
ONT
1h 20mnonstop
$211Southwest
Mon, Feb 2 - Wed, Feb 4
Southwest Logo
3:20 pm - 4:45 pm
ONT
-
OAK
1h 25mnonstop
Southwest Logo
2:45 pm - 4:05 pm
OAK
-
ONT
1h 20mnonstop
$215Southwest
Mon, Feb 2 - Wed, Feb 4
Alaska Airlines Logo
6:00 am - 8:40 pm
ONT
-
OAK
14h 40m1 stop
Alaska Airlines Logo
8:10 am - 7:16 pm
OAK
-
ONT
11h 06m2 stops
$219Alaska Airlines
Fri, Jan 30 - Sun, Feb 1
Alaska Airlines Logo
1:46 pm - 4:28 pm
ONT
-
OAK
26h 42m2 stops
Alaska Airlines Logo
8:10 am - 10:59 am
OAK
-
ONT
26h 49m1 stop
$220Alaska Airlines
Wed, Feb 11 - Fri, Feb 13
Southwest Logo
1:00 pm - 6:45 pm
ONT
-
OAK
5h 45m1 stop
Southwest Logo
6:00 am - 7:20 am
OAK
-
ONT
1h 20mnonstop
$221Southwest
Sat, Mar 7 - Wed, Mar 11
Southwest Logo
6:25 am - 1:55 pm
ONT
-
OAK
7h 30m1 stop
Southwest Logo
6:35 am - 7:55 am
OAK
-
ONT
1h 20mnonstop
$225Southwest
Booking Insights

KAYAK's insights & trends for Ontario to Oakland flights

Get data-powered insights and trends into flights from Ontario to Oakland to help you find the cheapest flights, the best time to fly and much more.

Find cheap flights to Oakland
Find cheap flights to Oakland

Planning a trip from Ontario to Oakland? KAYAK’s data-powered insights will help you find cheap flights. Learn the best time to fly, how early to book your ticket, and other tips to secure great prices.

What’s the cheapest day of the week to fly from Ontario to Oakland?

The average price of all round-trip flights from Ontario to Oakland clicked on KAYAK for each day over the last 12 months.

For Ontario to Oakland, Saturday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Oakland back to Ontario, the best deals are generally found on Tuesday, with Monday being the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Oakland, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Ontario to Oakland is September, where tickets cost $179 (return) on average. On the other hand, the most expensive months are November and January, where the average cost of round-trip tickets is $299 and $279 respectively.

Can I save money by flying with a layover from Ontario to Oakland?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $359 on average.

How far in advance should I book a flight from Ontario to Oakland?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Ontario to Oakland, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Ontario to Oakland, you should book around 3 weeks before departure, which saves you about 56% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 13 weeks before departure.

Expert advice

Expert advice for your flight from Ontario to Oakland

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airports
ONT

ONT offers streamlined security with average wait times of 6-15 minutes, making it ideal for business travelers on tight schedules.

OAK

For a quick trip to San Francisco, BART trains offer a convenient and cost-effective option from OAK, avoiding traffic delays.

Our travel experts
Jennifer Simonson

Jennifer Simonson

Expert on ONT

Jennifer Simonson

Jennifer Simonson

Jennifer Simonson is driven by her lifelong commitment to exploring the globe. Her insatiable curiosity had led her to immerse herself into diverse locations like Oklahoma City and Pismo. Her hotel recommendations are the result of the myriad hotels she's stayed at across her travels. Along her journey, she cherishes engaging conversations with locals, indulging in the finest ice cream, trying her hand at surfing, and embarking on nature-filled hikes.

Read more
Gabriel Leigh

Gabriel Leigh

Expert on OAK

Gabriel Leigh

Gabriel Leigh

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Read more

Good to know

Low seasonJanuary
Cheapest flight$82
Best time to beat the crowds but there is an average 9% increase in price.
Most popular time to fly with an average 6% increase in price.
Flight from Ontario to Oakland

When to book flights from Ontario to Oakland

Are your dates flexible? Find out the best times to travel from Ontario to Oakland based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ontario to Oakland

  • Can I get parking at Ontario International Airport?

    Parking at ONT is easy, affordable and convenient. There are 5 parking lots at ONT labeled 1-5. From the terminals, parking lots 2, 3 and 4 are accessible via walking but parking lot 5 is accessed using the inter-terminal shuttle bus. Parking lots 2 and 4 provide overnight parking with both general and premium parking packages and parking for electric vehicles for around $9 per hour to around $27 per day. Parking lots 5 and 3 are generally cheaper and charge around $16 for a full day of parking.

  • What family services does Oakland International Airport offer?

    OAK has Mamava Lactation pods located throughout the airport for nursing mothers to breastfeed their children and pump. The pods at OAK have enough space for the mother, baby, a small family and even a smaller and they have electric power outlets, a collapsible table and two benches. They can be found between Gates 25 and 26 at Terminal 2.

  • Does Oakland International Airport have lounges?

    The Escape Lounge at OAK is located between Gates 8 and 8A at Airside at Terminal 1. Economy class travelers can relax at Escape Lounge while accessing their services including snacks, television, and non-alcoholic beverages and can also view the Flight Information Monitor.

  • What cities are near Oakland International Airport?

    OAK is not far from cities like Alameda, Hayward, Moraga, Fairview, Ashland, San Lorenzo, San Leandro and Berkley.

  • What is the cheapest flight from Ontario to Oakland?

    In the last 3 days, the lowest price for a flight from Ontario to Oakland was $82 for a one-way ticket and $163 for a round-trip.

  • Do I need a passport to fly between Ontario and Oakland?

    No, a passport isn't needed to fly from Ontario to Oakland. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from Ontario to Oakland?

    When flying out of Ontario you will be using Ontario. You will be landing at Oakland, also known as Oakland.

  • Which airlines offer Wi-Fi service onboard planes from Ontario to Oakland?

    Delta, Alaska Airlines, Hawaiian Airlines, and JetBlue offer inflight Wi-Fi service on the Ontario to Oakland flight route.

  • Which aircraft models fly most regularly from Ontario to Oakland?

    The Boeing 737 MAX 8 is the aircraft model that flies most regularly on the Ontario to Oakland flight route.

  • On which days can I fly direct from Ontario to Oakland?

    There are nonstop flights from Ontario to Oakland on a daily basis.

  • Which is the best airline for flights from Ontario to Oakland, Southwest or Spirit Airlines?

    The two airlines most popular with KAYAK users for flights from Ontario to Oakland are Southwest and Spirit Airlines. With an average price for the route of $262 and an overall rating of 8.0, Southwest is the most popular choice. Spirit Airlines is also a great choice for the route, with an average price of $74 and an overall rating of 6.3.

  • How does KAYAK find such low prices on flights from Ontario to Oakland?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Oakland.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Oakland?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Oakland from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Oakland?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Oakland with an airline and back to Ontario with another airline. Booking your flights between Ontario and OAK can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Oakland?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Oakland from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Ontario to Oakland

  • Looking for a cheap flight? 25% of our users found flights on this route for $179 or less one-way and $319 or less round-trip.
  • Ontario International Airport (ONT) is a medium-sized international airport in Ontario consisting of three terminals, Terminals 2, 4 and the International Arrivals Terminal. Terminal 2 has 12 boarding gates while Terminal 4 has 14 boarding gates and all flights depart from either of these two terminals. Terminal 4 is served by American Airlines and Southwest Airlines, which has a direct flight from Ontario to Oakland. The International Arrivals Terminal handles all international arrivals to ONT. All the terminals are connected by a 24-hour free shuttle, which runs at intervals of about 15min, to each other, parking lot 5, the USO lounge and the Car Rental Facility.
  • The Oakland Museum of California implements a public art program at Oakland International Airport (OAK) that showcases art exhibitions at North Field, Terminal 2. There are several other artworks located at the Baggage Claim of Terminal 2, near Gates 26 and 32 post-security and Terminal 3, Airside.
  • Travelers and visitors of ONT traveling with pets and service animals can access services within their airport set aside for their potty needs. You can find both indoor and outdoor pet relief areas at ONT. The indoor option at ONT can be found near Gates 210 at Terminal 2 and near Gates 410 at Terminal 2.
  • If you’re traveling with heavy loads of luggage, have no worries. At ONT, you can rent baggage carts from the Baggage Claim area of both terminals, in the parking lots, and the Rental Car facility.
  • The Traveller’s Aid program at ONT is a non-profit organization with volunteers that provide travelers with general information about the airport and provide referral services. They help with situations like lost or stolen money, wiring money, transportation assistance, and emergency housing at ONT. They can be found between the Baggage Claim area and the escalator of both Terminals 2 and 4 between 9 am and 9 pm.

Prefer to fly direct from Ontario to Oakland?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Ontario to Oakland.
Find which airlines fly direct from Ontario Airport to Oakland Airport, which days they fly and book direct flights.

Direct departures

Ontario to Oakland

Monday

Southwest

Southwest

Tuesday

Southwest

Southwest

Wednesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights

Direct returns

Oakland to Ontario

Monday

Southwest

Southwest

Tuesday

Southwest

Southwest

Wednesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights

Reviews of the top 3 airlines serving from Ontario to Oakland

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Oakland. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ontario to Oakland? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4249 reviews
7.0Food
8.0Comfort
8.6Crew
8.1Boarding
7.5Entertainment
Airline reviews

The flight crew was extremely rude and especially not helpful when our flight was delayed.

2.0 MediocreMatthew, Jan 2026
DAL - SAN
Read more Southwest reviews

The flight crew was extremely rude and especially not helpful when our flight was delayed.

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

The lead steward kept singing about "San Francisco" and hotel California---more annoying than humorous....needs work. Flight was smooth and on time.

Still a fan of open seating. Flight was on schedule and arrived on time. The 737 MAX is very comfortable.

San Diego airport is brand new, spacious, airy and very smooth checkin at SW baggage drop.

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

Delays delays delays. Late taking off, late landing, wait for a gate, etc.

Connecting flight is on time and boarding was a breeze!

Very smooth checking in our luggage with a super pleasant SW agent. I enjoyed a fun entertaining movie.

First time traveling on Southwest since bag fees were implemented. Usual good service. Just more expensive now.

Once again, the staff seem to think they are above the customers and treat everyone with disdain, belittling people.

Flight was canceled 8 hours before departure for lack of operational control and prepositioning of a plane. Then had the audacity to say it was because of weather, however there was no weather here in California or New Orleans or in between. It was the weather in Florida, Florida it had nothing to do with our flight path just the plane was supposed to fly us. 8 hours is more than enough time to move a plane anywhere in the US. That left me with a bill of 1200 dollars to re book a flight oh and kayaks insurance what a joke. Probably will never use kayak or spirit ever again terrible companies terrible customer service. I’ll also let everyone and anyone know this was an abomination and only for the customer. Also will be making a report to the DOT on bad business practices on behalf of kayak and spirit as well as the BBB. Do better, take care of your customers and don’t suck

The airplane had a strange noise that was constant throughout the flight. Thankfully I had noise-cancelling over-ear headphones that muted much of it.

it was terrible. flight was cancelled hours before the flight without a given reason and no other booking available .

The plane was freezing and everyone had on their winter coats. I pulled out my sweaters out of my carryon to cover myself and put on an extra pair of socks. They offered NO FREE drinks or snacks on a 6 hour flight. The seats don’t have plugs or charges or any form of entertainment- so I just played my one downloaded game on my phone because I couldn’t sleep because I was too cold. Miserable flight though we landed safely.

Always comes in handy when I want a quick weekend getaway.

My luggage didn’t arrive at LAX, so that wasn’t a good experience.

I was never aware that I had to pay $100 per luggage to them on the plane that are simply carry-ons. This is discriminatory and I’m going to be alerting my entire family and friends and my Instagram following up over 75,000 of this issue and misunderstanding, including mismanaging.

Cancelled my flight last minute and did not help me rebook. It was a horrible experience.

Late departure by 1:45min. No explanation why. During boarding inconsistent policing of their baggage rules. Before takeoff and lamdimg strange obsession with window shade and armrest positions. Don't know why they care. 15 min tarmac delay on arrival, they blamed airport congestion but we were the o lh flight waiting, it was clear it was due to poor staff planning (only one ground crew to receive airplanes and multiple arrivals) Got there but was rrally lame the whole trip.

It was ok. It was expensive to check 2 bags ($75.00 per bag), and then it took a long time to wait for shuttle to take us from one terminal to the terminal where the plane was taking off at LAX. And all of this for a flight where we had to pay for any food or drink that was not water.

When I wanted to check in 3 hours prior to boarding time, the employees mentioned “a little over an hour delay” so I waited for an hour then I went to go look for food in the terminal and most people from that flight were in the same area looking for food. Finally I decided after food to check to see if it’s anytime closer and now it’s 2 mins until boarding closes?! What are you kidding me? I didn’t receive anything via sms about boarding now nor via email or on the intercom. I luckily made it through, barely, and then there’s no room for my carry on mind you I’m in the very first row so I had to place my purse in one further row back and my carry on sections down. Not sure who pays for better seats to get your stuff placed all over the plane but that was the worst experience I’ve ever had flying with anyone.

Terrible. The canceled my entire flight when I requested a refund for a trip frontier canceled trip one way.

i was unable to check in the flight. refund requested

I think Frontier was very good at communication. Their app worked very well. Loading was great and the flight was nice and easy.

This airline sucks. They offer low rates then charge you for everything, the app does not work well, the seats are the most uncomfortable. Maintenance issues on the flight, and you still have to sit through their credit card commercials. People are nice enough but does not make up for overall poor experience.

Great for the price. No wifi or entertainment, but gate agents and crew were fantastic and we boarded quickly and left on time.

Decent clean onboard experience. Okay discount airline experience. Unfortunately, any customer service interactions are difficult and unhelpful. There is no service. Also, a premium seat only gets you premium boarding if you line up first. Once they start general boarding you must go to the back of the line. Not very premium

The crew was mostly okay. The flight attendant who answered our questions was curt and unhelpful unfortunately. He seemed upset and I understand having off days.

Very bad! No good service delayed my second connection flight

Everything you need to know for your flight from Ontario to Oakland

Other airlines flying from Ontario to Oakland

Flights from the other most popular airlines that fly from Ontario to Oakland according to KAYAK users. Prices are the lowest found on KAYAK over the last 7 days. Price and availability are not guaranteed.