ONT - OAK

$49 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 10/9. 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

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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Flights 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

Mon, Aug 18 - Thu, Aug 21
Southwest Logo
3:15 pm - 4:35 pmONT-OAK
1h 20mnonstop
Southwest Logo
6:05 am - 7:30 amOAK-ONT
1h 25mnonstop
$97Southwest
Find Deal
Tue, Aug 12 - Thu, Aug 14
Southwest Logo
3:35 pm - 7:45 pmONT-OAK
4h 10m1 stop
Southwest Logo
7:55 pm - 9:20 pmOAK-ONT
1h 25mnonstop
$107Southwest
Find Deal
Tue, Aug 12 - Thu, Aug 14
Southwest Logo
8:15 am - 9:35 amONT-OAK
1h 20mnonstop
Southwest Logo
8:30 am - 9:50 amOAK-ONT
1h 20mnonstop
$124Southwest
Find Deal
Mon, Aug 4 - Thu, Aug 7
Southwest Logo
2:15 pm - 3:30 pmONT-OAK
1h 15mnonstop
Southwest Logo
8:30 am - 9:50 amOAK-ONT
1h 20mnonstop
$126Southwest
Find Deal
Mon, Aug 4 - Thu, Aug 7
Southwest Logo
5:25 pm - 12:20 amONT-OAK
6h 55m1 stop
Southwest Logo
1:10 pm - 2:30 pmOAK-ONT
1h 20mnonstop
$131Southwest
Find Deal
Sun, Aug 31 - Tue, Sep 2
Southwest Logo
4:50 pm - 6:15 pmONT-OAK
1h 25mnonstop
Southwest Logo
9:55 am - 11:15 amOAK-ONT
1h 20mnonstop
$132Southwest
Find Deal
Wed, Aug 6 - Fri, Aug 15
Southwest Logo
8:15 am - 9:35 amONT-OAK
1h 20mnonstop
Southwest Logo
8:30 am - 9:50 amOAK-ONT
1h 20mnonstop
$144Southwest
Find Deal
Mon, Aug 18 - Thu, Aug 21
Southwest Logo
5:50 am - 7:10 amONT-OAK
1h 20mnonstop
Southwest Logo
6:05 am - 7:30 amOAK-ONT
1h 25mnonstop
$145Southwest
Find Deal
Sun, Aug 31 - Mon, Sep 1
Southwest Logo
11:35 am - 8:40 pmONT-OAK
9h 05m2 stops
Southwest Logo
8:30 am - 9:50 amOAK-ONT
1h 20mnonstop
$146Southwest
Find Deal
Sat, Aug 23 - Mon, Aug 25
Hawaiian Airlines Logo
6:00 am - 1:36 pmONT-OAK
7h 36m1 stop
Hawaiian Airlines Logo
2:30 pm - 11:59 pmOAK-ONT
9h 29m1 stop
$234Hawaiian Airlines
Find Deal
Expert advice

Expert advice for your flight from Ontario to Oakland

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
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.

Read more about ONTby Jennifer Simonson
OAK

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

Read more about OAKby Gabriel Leigh
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
Useful Info

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 Tuesday is the most expensive. Flying from Oakland back to Ontario, the best deals are generally found on Sunday, 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 July, where tickets cost $208 (return) on average. On the other hand, the most expensive months are December and February, where the average cost of round-trip tickets is $280 and $277 respectively.

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. For the absolute cheapest price, our data suggests you should book 14 weeks before departure.

Good to know

Low seasonJanuary
High seasonMarch
Cheapest flight$49
Best time to beat the crowds with an average 0% drop in price.
Most popular time to fly with an average 5% 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 $49 for a one-way ticket and $97 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?

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

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

    The Boeing 737-800 Passenger/BBJ2 (winglets) 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.

  • 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 $108 or less one-way and $208 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 4245 reviews
8.6Crew
8.1Boarding
7.0Food
7.6Entertainment
8.0Comfort
Airline reviews

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

8.0 ExcellentMichael, Jun 2025PHX - SAN
Read more Southwest reviews

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

It was a perfect flight in all aspects! Both legs!

Boarding process, crew were good. But the seats were so uncomfortable that was all I could focus on. I literally had to sit forward so that all 3 of us could fit in row. I will try to avoid Southwest in the future for any flights over 60 minutes.

Great flight, 47 passengers on a 180 seat plane. Stewardess was pleasant and cheerful.

Great experience flying Southwest. The crew was really kind and helpful, and very friendly with our toddler.

Plane late from DC to Austin 30 minutes. Crew made up much of the time enroute to San Diego.

Fine, but how to board on SW versus othrr airlines, is just lame. Goood staff though and all was solid otherwise.

Was as expected. Crowed planes. Too many carryons delaying takeoff. But the ride only took an hour and saved me a lot of time SFO is a not a great airport.

I will be flying again Southwest Airlines. Friendly crew, comfortable and affordable.

The plane arrived 25 minutes late, and the Wi-Fi was slower than it usually is.

Boarding was a breeze, however, two of the flights that I boarded with Spirit did not have Wi-Fi available.

Very good. Nothing more or less than expected. No complaints.

My experience with the spirit as a first time it was OK, but the seats need a little cushion, the problem I had the most impacted me was when checking in the scales were so off and wrong. It will tell that you would have more weight, which was not true. The scale was say that it had Thirty Eight Pounds, when get in the labels when we send the luggage into the band. It says that it was overweight. I really really dislike that because the scales are not accurate. If I use Spirit and I have that issue again. That will be my last time flying with the spirit, even though I like so much to service the planes, and everything else

hahaha we are delayed for one hour plus.. but thx we arrived San Diego safe

Worst airline ever! The guy weighing my bag had his foot on the metal plate and when I called him out on it, I got this stupid little smirk. La is a scam and so is Spirit Airlines. All the flight attendants looked like they hated our flight just as much as we did.

Unclear pricing; ended up being charged an extra $52 just to get onboard

Spirit is awful. Too expensive for what you get. Stop nickel and diming.

would be great to get basic water, soda at least and stop charging for carry ons

Your crew is a representation of your Standards and Values. The crew from Seattle to LAX, was very disappointing. The crew was more interested in hanging out at the lobby area. Talking, laughing loudly and eating all the snacks. They did not do regular rounds to see if customers needed anything. This was a huge disappointment. I will no longer be flying with your airlines moving forward.

- flight attendants not very friendly. - Paid for WiFi and plane didn’t have it working , never got a refund.

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

They canceled flight. Hard to believe there was even a plane incoming for us to get on

Cancelled flight after I arrived at airport after 75 min drive and parking. Next flight was 4 days in the future. Had to scramble and buy a much more expensive flight on another carrier.

I liked the turn-style feature at gate 209B at LAX. Very efficient process. The gate staff also made several, clearly directed announcements so I felt very informed.

Plane was down graded and I lost my uncharged exit row with more leg room. No mention or offer of refund from podium. Flight attendant was nice to explain this happens often and that I could request a refund via online form submission. I did this and have heard nothing back.

Horrendous. I do not recommend Frontier. The passengers lack manners and decency, and the flight attendants lack professionalism. If I wasn’t in a bind to fly with 48 hours notice for a job interview, I would not have selected a flight with Frontier and I never plan to fly with them in the future.

The seats were hard molded plastic covered in plastic vinyl. And the scam to charge people extra to sit together. Don’t they know we can just ask someone to trade seats. And watching the staff separate young children from parents… super classy. We had to guilt them into offering up our seats. This companies policies suck. Don’t give them your money.

The seats were awful, hard plastic covered in sheet vinyl. The airline tries to scam you into paying extra to get seat together when the flight wasn’t full. They were going to separate a family with young children but my wife who had a row to herself gave up her seat so the young mom could be with her young boys. I’m never giving this airline my money again.

It was a short flight so no food or entertainment….

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

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