OAK - ONT

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

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$175
Typical prices: $236-$411
Frontier
Sat 9/22Sun 9/30
OAK - ONT • 1 stop
Cheapest non-stop
$178
Typical prices: $236-$412
Frontier
Wed 11/21Mon 11/26
OAK - ONT • Non-stop
Nonstop flights
You can fly direct with Southwest and Frontier. Average duration is 1h 21m
Direct flights
+1
Direct flights
+1
When to book
in advance
Our data shows that travelers who book at least 9 weeks in advance save around 63% compared to booking last minute.
Insights
Insights
When to travel
Cheapest • 24% price drop
Most popular
Good to know
+1
Good to know
+1
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Expert advice
Flight Deals

Cheap Flights from Oakland to Ontario (OAK-ONT)

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

Recent round-trip flight deals from Oakland to Ontario

Tue, Sep 22 - Wed, Sep 30
Frontier Logo
12:47 pm - 9:09 amOAK  Oakland-ONT Ontario
20h 22m1 stop Las Vegas Harry Reid Intl
Frontier Logo
2:30 pm - 9:22 amONT  Ontario-OAK Oakland
18h 52m1 stop Las Vegas Harry Reid Intl
$175Frontier
Wed, Oct 7 - Wed, Oct 14
Frontier Logo
12:47 pm - 11:16 amOAK  Oakland-ONT Ontario
22h 29m1 stop Las Vegas Harry Reid Intl
Frontier Logo
5:25 pm - 4:25 pmONT  Ontario-OAK Oakland
23h 00m1 stop Las Vegas Harry Reid Intl
$177Frontier
Tue, Sep 15 - Thu, Sep 17
Frontier Logo
12:47 pm - 9:09 amOAK  Oakland-ONT Ontario
20h 22m1 stop Las Vegas Harry Reid Intl
Frontier Logo
2:30 pm - 9:22 amONT  Ontario-OAK Oakland
18h 52m1 stop Las Vegas Harry Reid Intl
$177Frontier
Mon, Sep 14 - Tue, Sep 15
Frontier Logo
10:17 am - 9:09 amOAK  Oakland-ONT Ontario
22h 52m1 stop Las Vegas Harry Reid Intl
Frontier Logo
5:44 pm - 11:51 amONT  Ontario-OAK Oakland
18h 07m1 stop Las Vegas Harry Reid Intl
$178Frontier
Sat, Sep 26 - Mon, Sep 28
Southwest Logo
6:40 am - 8:05 amOAK  Oakland-ONT Ontario
1h 25mnonstop
Southwest Logo
8:00 pm - 9:20 pmONT  Ontario-OAK Oakland
1h 20mnonstop
$237Southwest
Wed, Oct 7 - Wed, Oct 14
Southwest Logo
7:55 pm - 9:15 pmOAK  Oakland-ONT Ontario
1h 20mnonstop
Southwest Logo
10:15 am - 11:30 amONT  Ontario-OAK Oakland
1h 15mnonstop
$237Southwest
Sat, Sep 12 - Sat, Sep 12
Southwest Logo
6:40 am - 8:05 amOAK  Oakland-ONT Ontario
1h 25mnonstop
Southwest Logo
4:00 pm - 5:20 pmONT  Ontario-OAK Oakland
1h 20mnonstop
$237Southwest
Mon, Sep 21 - Mon, Sep 28
Multiple Airlines Logo
6:01 am - 3:47 pmOAK  Oakland-ONT Ontario
9h 46m2 stops Seattle/Tacoma Intl Santa Rosa Sonoma County
Multiple Airlines Logo
2:30 pm - 5:56 pmONT  Ontario-OAK Oakland
3h 26m1 stop Las Vegas Harry Reid Intl
$301Multiple Airlines
Thu, Sep 17 - Mon, Sep 21
Multiple Airlines Logo
10:17 am - 4:59 pmOAK  Oakland-ONT Ontario
6h 42m1 stop Las Vegas Harry Reid Intl
Multiple Airlines Logo
4:27 pm - 11:06 amONT  Ontario-OAK Oakland
18h 39m2 stops Santa Rosa Sonoma County San Diego
$305Multiple Airlines
Thu, Oct 29 - Wed, Nov 4
Multiple Airlines Logo
10:18 am - 4:21 pmOAK  Oakland-ONT Ontario
6h 03m1 stop Las Vegas Harry Reid Intl
Multiple Airlines Logo
10:40 am - 4:33 pmONT  Ontario-OAK Oakland
5h 53m1 stop Portland
$316Multiple Airlines
Booking Insights

Price, demand and travel trends for Oakland to Ontario flights

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

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

Round-trip flights from Oakland to Ontario start at $175. Prices are below average for this route right now, with typical round-trip fares ranging from $236 to $411. The lowest price found in the past 5 days was $175 on Frontier.

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

Monday is the cheapest day of the week to fly from Oakland to Ontario, it is 14% cheaper than the average day. Sunday is the most expensive day with flight prices 44% higher than average. Based on deals found by KAYAK users in the last 12 months.

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

  • October is the cheapest month to fly from Oakland to Ontario at $228 round-trip.
  • February ($411) and December ($319) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 80% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are prices from Oakland to Ontario the cheapest?

Flights from Oakland to Ontario are cheapest 9 weeks before departure. Booking in this window typically costs about 63% 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 Oakland to Ontario

 
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 Oakland to Ontario flights

Low season

January

Cheapest flight

$79
Best time to beat the crowds with an average 3% drop in price.
Most popular time to fly and prices are also 24% lower on average.
Flight from Oakland to Ontario

When to book flights from Oakland to Ontario

Are your dates flexible? Find out the best times to travel from Oakland to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Oakland to Ontario flight questions, answered

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

  • What are the transport options from Ontario International Airport (ONT)?

    A very cost-effective and convenient way to make the trip from the airport to the downtown area is to travel on the line number 61 bus operated by Omnitrans that can take you from the airport to the downtown area in about 17 minutes.

  • Which hotels are near Ontario International Airport?

    One of the best hotel choices for travelers that wish to stay close to this airport is the Comfort Suites Ontario Convention Center, that not only sits close to the airport property but also offers a free airport shuttle.

  • Where are the car rental providers at Ontario International Airport?

    All of the major rental car companies that operate at this airport do so at the offsite rental car center. There is a complimentary shuttle service between the terminal building and the rental car center that is quite easy to access at the curbside just outside of the baggage claim exit doors.

  • Where can I meet my driver at at Ontario International Airport?

    Both of the terminal buildings offer dedicated rideshare pick-up areas. To find these areas, simply exit the terminal building from the baggage claim area, and you will quickly find signage showing the location of the designated pick-up points on the curbside outside the terminal.

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

    Among airlines operating Oakland to Ontario flights:

    • Southwest: offers free seat selection

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

  • What airlines are available from Oakland to Ontario?

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

    • Southwest
    • Frontier

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

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

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

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

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

    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 Oakland to Ontario?

    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 Oakland to Ontario?

    Yes. Being flexible with your travel dates can save you up to 40% on the Oakland to Ontario route. Monday is the cheapest departure day at $259 round-trip on average, while Sunday is the most expensive at $431, a difference of $172. 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 Oakland to Ontario spread across the day?

    Morning is the busiest departure period on Oakland to Ontario 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 Ontario?

    Some of the most popular sights in Ontario are Ontario Convention Center, Ontario Mills and Cucamonga-Guasti Regional Park. These are among the most viewed places in Ontario on KAYAK.

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

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

    • Earliest: departs at 5:50 am and lands at 7:11 am
    • Latest: departs at 9:45 pm and lands at 11:06 pm.

    The flight takes about 1h 21m.

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

    Last-minute fares on this route - booked within 2 weeks of departure - run 72% above the route average of $299. Book 9 weeks before departure for the lowest fares.

  • How long is a flight from Oakland to Ontario?

    A nonstop flight from Oakland to Ontario takes 1h 21m, covering 361 miles.

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

    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 are flight prices from Oakland to Ontario looking right now?

    One-way fares from Oakland to Ontario are currently lower than usual. Average one-way flight prices are about $125, which is 40% below the typical average for this route.

  • What car rental options are available at Ontario Airport (ONT)?

    Ontario Airport (ONT) hosts 5 major car rental companies, with daily rates starting from around $18 for economy cars. Top options include:
    · Fox
    · Thrifty
    · Europcar
    · Dollar
    · Alamo

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

    Round-trip flights from Oakland to Ontario range from $236 to $411, with an average of $299 over the past 12 months. Anything below $236 counts as a good deal.

Your guide to booking Oakland to Ontario 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 Monday departure instead of Sunday. On this route, Monday flights average $259 - about $172 less than Sunday (40% 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 63% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Oakland to Ontario trip for October. Fares historically average $228 round-trip in that month - typically $183 less than the most expensive month, which is February (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Ontario Airport.
    - Azure Hotel & Suites, Trademark Collection by Wyndham
    - La Quinta Inn & Suites by Wyndham Ontario Airport
    - Holiday Inn Ontario Airport By IHG
  • For those travelers that would like to make their way from the downtown area of Oakland to the Oakland International Airport (OAK) without having to drive in their own car, a good option is to take the Bay Area Rapid Transit Orange line to the Colosseum station and then transfer to the beige line to continue to the airport. This entire trip takes around 22 minutes to finish.
  • Passengers that are going to drive their own car to the Oakland International Airport should be aware of the fact that this airport offers quite a variety of different parking choices ranging from their premier lot that offers the closest parking to the terminal building down to their economy lot that offers the cheapest daily rates and free shuttle service back to the terminal building.
  • Nursing moms traveling through the Oakland International Airport should know that this airport offers two Mamava Nursing Pod locations at this airport with one of these pods being in each of the terminal buildings at the airport.
  • If you are trying to find a comfortable place to wait for your flight at Oakland International Airport, one location to consider is the Escape Lounge, that has a location near gate eight. You can go online to book your spot ahead of time, and when you get to the lounge, you will see that it offers plenty of comfortable seating options as well as a good selection of food and beverage choices.
  • For those travelers that will be making the trip to Ontario with a pet or a service animal, it is good to know that the Oakland International Airport features pet relief areas both inside and outside of the terminal buildings. The indoor space sits adjacent to gate 25 and features a sink, cleaning tools, artificial turf, and a miniature red fire hydrant.

Prefer to fly direct from Oakland to Ontario?

 
Find which airlines fly direct from Oakland Airport to Ontario Airport, which days they fly and book direct flights.

Direct departures

Oakland to Ontario

Monday

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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

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

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

Other airlines flying from Oakland to Ontario