ONT - OAK

$79 Find Cheap Flights from Ontario to Oakland - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$174
Typical prices: $255-$399
Frontier
Mon 9/17Thu 9/20
ONT - OAK • 1 stop
Cheapest non-stop
$203
Typical prices: $253-$393
Frontier
Mon 11/26Thu 11/29
ONT - OAK • Non-stop
Nonstop flights
You can fly direct with Southwest and Frontier. Average duration is 1h 19m
Direct flights
+1
Direct flights
+1
When to book
in advance
Our data shows that travelers who book at least 23 weeks in advance save around 66% compared to booking last minute.
Insights
Insights
When to travel
Cheapest • 27% price drop
Most popular
Good to know
+1
Good to know
+1
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Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Ontario to Oakland (ONT-OAK)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Oakland

Thu, Sep 17 - Sun, Sep 20
Frontier Logo
8:00 am - 5:56 pmONT  Ontario-OAK Oakland
9h 56m1 stop Las Vegas Harry Reid Intl
Frontier Logo
6:51 pm - 7:04 amOAK  Oakland-ONT Ontario
12h 13m1 stop Las Vegas Harry Reid Intl
$174Frontier
Thu, Sep 10 - Tue, Sep 15
Frontier Logo
8:00 am - 5:56 pmONT  Ontario-OAK Oakland
9h 56m1 stop Las Vegas Harry Reid Intl
Frontier Logo
12:47 pm - 9:09 amOAK  Oakland-ONT Ontario
20h 22m1 stop Las Vegas Harry Reid Intl
$174Frontier
Thu, Oct 8 - Mon, Oct 12
Frontier Logo
8:35 pm - 9:05 amONT  Ontario-OAK Oakland
12h 30m1 stop Las Vegas Harry Reid Intl
Frontier Logo
5:20 pm - 9:09 amOAK  Oakland-ONT Ontario
15h 49m1 stop Las Vegas Harry Reid Intl
$175Frontier
Tue, Oct 13 - Tue, Oct 20
Frontier Logo
5:25 pm - 11:52 amONT  Ontario-OAK Oakland
18h 27m1 stop Las Vegas Harry Reid Intl
Frontier Logo
12:47 pm - 9:09 amOAK  Oakland-ONT Ontario
20h 22m1 stop Las Vegas Harry Reid Intl
$175Frontier
Thu, Sep 17 - Sat, Sep 19
Southwest Logo
8:00 pm - 9:20 pmONT  Ontario-OAK Oakland
1h 20mnonstop
Southwest Logo
6:25 pm - 7:50 pmOAK  Oakland-ONT Ontario
1h 25mnonstop
$237Southwest
Tue, Dec 22 - Tue, Dec 29
Southwest Logo
6:10 am - 7:35 amONT  Ontario-OAK Oakland
1h 25mnonstop
Southwest Logo
11:05 am - 12:25 pmOAK  Oakland-ONT Ontario
1h 20mnonstop
$237Southwest
Thu, Oct 8 - Mon, Oct 12
Southwest Logo
8:20 pm - 9:35 pmONT  Ontario-OAK Oakland
1h 15mnonstop
Southwest Logo
7:50 pm - 9:10 pmOAK  Oakland-ONT Ontario
1h 20mnonstop
$237Southwest
Fri, Sep 18 - Thu, Sep 24
Multiple Airlines Logo
4:27 pm - 11:06 amONT  Ontario-OAK Oakland
18h 39m2 stops Santa Rosa Sonoma County San Diego
Multiple Airlines Logo
10:17 am - 4:59 pmOAK  Oakland-ONT Ontario
6h 42m1 stop Las Vegas Harry Reid Intl
$275Multiple Airlines
Mon, Sep 21 - Mon, Sep 28
Multiple Airlines Logo
2:30 pm - 5:56 pmONT  Ontario-OAK Oakland
3h 26m1 stop Las Vegas Harry Reid Intl
Multiple Airlines Logo
6:01 am - 4:10 pmOAK  Oakland-ONT Ontario
10h 09m2 stops Seattle/Tacoma Intl Boise Air Term. Gowen Fld
$296Multiple Airlines
Fri, Sep 25 - Sun, Sep 27
Multiple Airlines Logo
4:27 pm - 11:06 amONT  Ontario-OAK Oakland
18h 39m2 stops Santa Rosa Sonoma County San Diego
Multiple Airlines Logo
6:51 pm - 7:04 amOAK  Oakland-ONT Ontario
12h 13m1 stop Las Vegas Harry Reid Intl
$311Multiple Airlines
Booking Insights

Price, demand and travel trends for Ontario to Oakland flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Ontario to Oakland with more confidence.

How much is a round-trip flight from Ontario to Oakland?

Round-trip flights from Ontario to Oakland start at $174. Prices are below average for this route right now, with typical round-trip fares ranging from $255 to $399. The lowest price found in the past 5 days was $174 on Frontier.

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

Thursday is the cheapest day of the week to fly from Ontario to Oakland, it is 8% cheaper than the average day. Sunday is the most expensive day with flight prices 56% higher than average. Based on deals found by KAYAK users in the last 12 months.

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

  • October is the cheapest month to fly from Ontario to Oakland at $219 round-trip.
  • January ($359) and July ($329) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 63% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are prices from Ontario to Oakland the cheapest?

Flights from Ontario to Oakland are cheapest 23 weeks before departure. Booking in this window typically costs about 66% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Expert advice

Expert advice for your flight from Ontario to Oakland

 
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Jennifer Simonson

Jennifer Simonson

Expert on ONT

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.

Gabriel Leigh

Gabriel Leigh

Expert on OAK

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.

Key details for Ontario to Oakland flights

Low season

January

Cheapest flight

$79
Best time to beat the crowds but there is an average 20% increase in price.
Most popular time to fly and prices are also 3% lower on average.
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

Your Ontario to Oakland flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • 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.

  • Which airlines offer extra legroom and free seat selection on Ontario to Oakland flights?

    Among airlines operating Ontario to Oakland flights:

    • Southwest: offers free seat selection

    Extra legroom and free seat selection availability depends on fare class and route.

  • What airlines are available from Ontario to Oakland?

    2 airlines operate flights between Ontario and Oakland. The airlines offering nonstop flights on this route include:

    • Southwest
    • Frontier

  • Which airports can I use when flying from Ontario to Oakland?

    Flights from Ontario to Oakland usually depart from Ontario (ONT) and arrive at Oakland (OAK).

  • Which airlines include bags at no extra cost on Ontario to Oakland flights?

    Here are some options for this route, based on selected ticket types and cabin classes:

    • Southwest: a cabin bag and a checked bag in Economy Class

    Bag allowance can vary by ticket type, cabin class, route and airline, so travelers should check the fare details before booking.

  • What cabin classes can I book on flights from Ontario to Oakland?

    Only Economy Class is available on flights from Ontario to Oakland.

  • What is the standard checked-bag allowance on flights from Ontario to Oakland?

    There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $45–$90 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

  • Which aircraft model is used most often on flights from Ontario to Oakland?

    The Boeing 737 MAX 8 family is used most often on this route, operated mainly by Southwest. Other aircraft seen on the route include Boeing 737-800 Passenger/BBJ2 (winglets) variants.

  • Can I save money by using flexible dates for flights from Ontario to Oakland?

    Yes. Being flexible with your travel dates can save you up to 41% on the Ontario to Oakland route. Thursday is the cheapest departure day at $278 round-trip on average, while Sunday is the most expensive at $467, a difference of $189. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How are flight departures from Ontario to Oakland spread across the day?

    Morning is the busiest departure period on Ontario to Oakland flights, with 50% of flights leaving in that window. Afternoon departures account for 25%, evening flights for 25%, and night flights for 0%.

  • What popular places can I visit in Oakland?

    Some of the most popular sights in Oakland are Oakland Arena, Fox Theater and Jack London Square. These are among the most viewed places in Oakland on KAYAK.

  • What are the earliest and latest flights from Ontario to Oakland?

    These are the earliest and latest flight times available from Ontario to Oakland:

    • Earliest: departs at 5:45 am and lands at 7:04 am
    • Latest: departs at 9:10 pm and lands at 10:29 pm.

    The flight takes about 1h 19m.

  • How expensive are last-minute Ontario to Oakland flights?

    Last-minute fares on this route - booked within 2 weeks of departure - run 86% above the route average of $299. Book 23 weeks before departure for the lowest fares.

  • How long is a flight from Ontario to Oakland?

    A nonstop flight from Ontario to Oakland takes 1h 19m, covering 361 miles.

  • Do I need a passport to fly from Ontario to Oakland?

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

  • Have flight prices from Ontario to Oakland changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $174 to $1,409. That means the highest observed fare was about 8x higher than the lowest one.

  • How are flight prices from Ontario to Oakland looking right now?

    One-way fares from Ontario to Oakland are currently lower than usual. Average one-way flight prices are about $123, which is 36% below the typical average for this route.

  • What car rental options are available at Oakland Airport (OAK)?

    Oakland Airport (OAK) hosts 5 major car rental companies, with daily rates starting from around $21 for economy cars. Top options include:
    · Dollar
    · Thrifty
    · Budget
    · Hertz
    · Alamo

  • How much should I expect to pay for a Ontario to Oakland flight?

    Round-trip flights from Ontario to Oakland range from $255 to $399, with an average of $299 over the past 12 months. Anything below $255 counts as a good deal.

Your guide to booking Ontario to Oakland flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates can be flexible, aim for a Thursday departure instead of Sunday. On this route, Thursday flights average $278 - about $189 less than Sunday (40% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 23 weeks before you fly. On this route, that window historically saves about 66% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Ontario to Oakland trip for October. Fares historically average $219 round-trip in that month - typically $140 less than the most expensive month, which is January (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Oakland Airport.
    - Oakland Airport Executive Hotel
    - Holiday Inn Express & Suites Oakland-Airport By IHG
    - Holiday Inn & Suites Oakland - Airport By IHG
  • 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?

 
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

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

Other airlines flying from Ontario to Oakland