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ONT - OAK

$69 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
$108
Typical prices: $259-$413
Frontier
Mon 11/26Mon 11/26
ONT - OAK • Non-stop
Cheapest one-way
$54
Typical prices: $130-$327
Frontier
Wed 11/21
ONT - OAK • Non-stop
Nonstop flights
Every day
You can fly direct with Southwest and Frontier. Average duration is 1h 21m
Direct flights
+1
Direct flights
+1
When to book
9 weeks
in advance
Our data shows that travelers who book at least 9 weeks in advance save around 57% compared to booking last minute.
Insights
Insights
When to travel
September
Cheapest • 8% price drop
April
Most popular
Good to know
+1
Good to know
+1
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We hope you love your trip to Oakland!
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, Nov 26 - Thu, Nov 26
Frontier Logo
1:43 pm - 3:03 pmONT  Ontario-OAK Oakland
1h 20mnonstop
Frontier Logo
8:35 pm - 9:52 pmOAK  Oakland-ONT Ontario
1h 17mnonstop
$108Frontier
Tue, Nov 24 - Sat, Nov 28
Frontier Logo
12:24 pm - 1:44 pmONT  Ontario-OAK Oakland
1h 20mnonstop
Frontier Logo
8:42 pm - 9:59 pmOAK  Oakland-ONT Ontario
1h 17mnonstop
$141Frontier
Tue, Nov 24 - Tue, Dec 1
Frontier Logo
12:24 pm - 1:44 pmONT  Ontario-OAK Oakland
1h 20mnonstop
Frontier Logo
12:28 pm - 6:31 pmOAK  Oakland-ONT Ontario
6h 03m1 stop Las Vegas Harry Reid Intl
$142Frontier
Sat, Nov 21 - Tue, Nov 24
Frontier Logo
1:37 pm - 2:57 pmONT  Ontario-OAK Oakland
1h 20mnonstop
Frontier Logo
8:35 pm - 9:52 pmOAK  Oakland-ONT Ontario
1h 17mnonstop
$142Frontier
Thu, Nov 12 - Mon, Nov 16
Southwest Logo
5:30 pm - 6:50 pmONT  Ontario-OAK Oakland
1h 20mnonstop
Southwest Logo
11:30 am - 12:50 pmOAK  Oakland-ONT Ontario
1h 20mnonstop
$177Southwest
Thu, Nov 26 - Thu, Nov 26
Southwest Logo
5:50 am - 9:20 amONT  Ontario-OAK Oakland
3h 30m1 stop Las Vegas Harry Reid Intl
Southwest Logo
2:45 pm - 4:05 pmOAK  Oakland-ONT Ontario
1h 20mnonstop
$187Southwest
Thu, Nov 12 - Mon, Nov 16
Southwest Logo
1:20 pm - 7:15 pmONT  Ontario-OAK Oakland
5h 55m1 stop Denver Intl
Southwest Logo
6:55 am - 8:15 amOAK  Oakland-ONT Ontario
1h 20mnonstop
$187Southwest
Tue, Nov 3 - Tue, Nov 10
Multiple Airlines Logo
4:09 pm - 10:40 pmONT  Ontario-OAK Oakland
6h 31m1 stop Seattle/Tacoma Intl
Multiple Airlines Logo
12:48 pm - 9:40 amOAK  Oakland-ONT Ontario
20h 52m1 stop Las Vegas Harry Reid Intl
$218Multiple Airlines
Sat, Nov 14 - Sat, Nov 21
Multiple Airlines Logo
6:00 am - 12:01 pmONT  Ontario-OAK Oakland
6h 01m1 stop Seattle/Tacoma Intl
Multiple Airlines Logo
8:42 pm - 9:59 pmOAK  Oakland-ONT Ontario
1h 17mnonstop
$247Multiple Airlines
Wed, Oct 28 - Sat, Oct 31
Alaska Airlines Logo
6:02 am - 6:54 pmONT  Ontario-OAK Oakland
12h 52m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
7:02 am - 12:06 pmOAK  Oakland-ONT Ontario
29h 04m1 stop Seattle/Tacoma Intl
$255Alaska 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 with more confidence.

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

Round-trip flights from Ontario to Oakland typically range from $259 to $413. The lowest price found in the past 5 days was $108, on Frontier.

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

Based on deals KAYAK users found in the last 12 months, Saturday is the cheapest day of the week to fly from Ontario to Oakland. It’s 8% cheaper than the average day, while Sunday is the most expensive, with prices 63% higher.

What’s the cheapest month to fly from Ontario to Oakland?

•September is the cheapest month to fly from Ontario to Oakland at $278 round-trip.
•November ($372) and January ($359) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 33% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from Ontario to Oakland the cheapest?

Flights from Ontario to Oakland are cheapest 9 weeks before departure. Booking in this window typically costs about 57% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

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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.

Read more
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.

Read more

Key details for Ontario to Oakland flights

Low season

January

Cheapest flight

$54
Beat the crowds with an average 44% drop in travelers.
The most popular month to fly with an average 49% increase in travelers.
One-way 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 answers about this route, including flight times, airports, airlines and booking tips.

  • 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 7:06 am
    • Latest: departs at 10:25 pm and lands at 11:46 pm.

    The flight takes about 1h 21m.

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

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

  • How long is a flight from Ontario to Oakland?

    A nonstop flight from Ontario to Oakland takes 1h 21m, 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.

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

    Round-trip flights from Ontario to Oakland range from $259 to $413, with an average of $301 over the past 12 months. Anything below $259 counts as a good deal.

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

    Last-minute fares on this route (booked within two weeks of departure) run 95% above the $301 route average. Book 9 weeks before departure for the lowest fares.

  • How much can I save by taking a layover when flying from Ontario to Oakland?

    On this route, nonstop and layover fares are close on average, with nonstop at $301 round-trip and layover options via Las Vegas Harry Reid Intl (LAS) at $291.

  • 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.

  • 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%.

  • 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 $95, which is 52% 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 $22 for economy cars. Top options include:

    • Dollar
    • Thrifty
    • Hertz
    • Budget
    • Alamo

  • 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 airports do connecting flights from Ontario to Oakland pass through?

    Most connecting flights from Ontario to Oakland pass through Las Vegas Harry Reid Intl (LAS), which handles 100% of one-stop traffic on this route.

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

    Yes. Flexible dates can save you up to 44% on flights from Ontario to Oakland. Saturday is the cheapest departure day at $278 round-trip on average, while Sunday is the most expensive at $491, a difference of $213.

    Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

  • What airlines fly from Ontario to Oakland?

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

    • Southwest
    • Frontier

  • 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.

  • 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.

  • 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 always check the fare details before booking.

  • What cities are near Oakland International Airport?

    Berkeley is 26 minutes from OAK.

  • Is parking available at ONT?

    Yes, ONT has at least 6 parking lots labeled 1-6. Parking lots 2, 3 and 4 are within walking distance of the terminals, while Lot 5 is reached by the inter-terminal shuttle bus. Parking lots 2 and 4 offer overnight parking, general and premium parking packages and electric-vehicle parking. General parking costs $10 for up to one hour and $30 for up to 24 hours. Premium parking costs $12 for up to one hour and $35 for up to 24 hours. Lot 5 costs $20 for up to 24 hours and Lot 3 costs $25 for up to 24 hours.

  • What family services does Oakland International Airport offer?

    Oakland International Airport (OAK) offers spaces for nursing mothers to breastfeed and pump. These include a permanent lactation suite by the family restrooms at Gate 7 in Terminal 1 and a Mamava lactation pod in Terminal 2 between Gates 25 and 26.

  • Does Oakland International Airport have lounges?

    Yes, OAK has the Escape Lounge, located airside in Terminal 1 between Gates 8 and 8A. Economy class travelers can access it.

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 are flexible, aim for a Saturday departure and avoid flying on Sunday. On this route, Saturday flights average $278, about $213 less than Sunday fares (43% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 9 weeks before you fly. On this route, that window historically saves about 57% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Ontario to Oakland trip for September. Fares historically average $278 round-trip in that month - typically $94 less than the most expensive month, which is November (based on the last 12 months).
  • If you have the time, taking a 1-stop flight through Las Vegas Harry Reid Intl Airport (LAS) can be cheaper than flying direct. The cheapest layover option averages $291 round-trip on this route - about $10 less than direct flights (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
    • SpringHill Suites by Marriott Oakland Airport
  • Ontario International Airport (ONT) has three terminals: Terminal 2, Terminal 4 and the International Arrivals Terminal. Before heading out, check whether your flight departs from Terminal 2 or Terminal 4, since all flights leave from one of those two terminals. Use the free 24-hour shuttle to get between Terminals 2 and 4. It runs every 5 to 20 minutes, though departures are less frequent from 12:30 to 3 a.m. The shuttle also serves the Car Rental Facility and a USO stop can be requested. If you're using Parking Lot 5, take the complimentary shuttle to the terminals.
  • If you need help at Ontario International Airport, stop by Travelers Aid at the Welcome/Information Centers in Terminals 2 and 4 between 9 am and 9 pm.
  • At Ontario International Airport (ONT), you can use indoor and outdoor pet relief areas when traveling with a pet or service animal. The indoor areas are near Gates 210 in Terminal 2 and 410 in Terminal 4.

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

Frontier,Southwest

Frontier,Southwest

Wednesday

Southwest

Southwest

Thursday

Frontier,Southwest

Frontier,Southwest

Friday

Southwest

Southwest

Saturday

Frontier,Southwest

Frontier,Southwest

Sunday

Frontier,Southwest

Frontier,Southwest

See more direct flights

Direct returns

Oakland to Ontario

Monday

Southwest

Southwest

Tuesday

Frontier,Southwest

Frontier,Southwest

Wednesday

Southwest

Southwest

Thursday

Frontier,Southwest

Frontier,Southwest

Friday

Southwest

Southwest

Saturday

Frontier,Southwest

Frontier,Southwest

Sunday

Frontier,Southwest

Frontier,Southwest

See more direct flights

More options for your flight from Ontario to Oakland

Complete your trip to Oakland with a hotel stay or car rental

Car rentals in Oakland
Hotels in Oakland
Vacations in Oakland