ONT - PHX

$79 Find Cheap Flights from Ontario to Phoenix Sky Harbor Airport

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 Phoenix departing on 5/21. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Phoenix Sky Harbor Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Phoenix, 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 Phoenix, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Ontario to Sky Harbor Intl

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Sky Harbor Intl 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.

Recent round-trip flight deals from Ontario to Phoenix

KAYAK's recommended round-trip deals from the most popular airlines that fly from Ontario to Phoenix.
Discover the best prices for you by selecting your travel dates on KAYAK.
Frontier Logo
12:59 am - 12:07 pmONT-PHX
11h 08m1 stop
Frontier Logo
1:17 pm - 11:08 pmPHX-ONT
9h 51m1 stop
$170Frontier
Find Deal
Tue, May 13 - Wed, May 21
Frontier Logo
12:59 am - 12:07 pmONT-PHX
11h 08m1 stop
Frontier Logo
1:17 pm - 11:08 pmPHX-ONT
9h 51m1 stop
$171Frontier
Find Deal
Mon, May 12 - Wed, May 21
American Airlines Logo
6:23 am - 7:39 amONT-PHX
1h 16mnonstop
American Airlines Logo
8:25 pm - 9:38 pmPHX-ONT
1h 13mnonstop
$224American Airlines
Find Deal
Wed, Jun 18 - Sat, Jun 21
Southwest Logo
11:50 am - 1:05 pmONT-PHX
1h 15mnonstop
Southwest Logo
10:05 am - 5:25 pmPHX-ONT
7h 20m1 stop
$225Southwest
Find Deal
Fri, May 30 - Sat, May 31
Southwest Logo
4:55 pm - 6:10 pmONT-PHX
1h 15mnonstop
Southwest Logo
1:25 pm - 5:50 pmPHX-ONT
4h 25m1 stop
$232Southwest
Find Deal
Fri, May 30 - Mon, Jun 2
American Airlines Logo
7:25 pm - 8:40 pmONT-PHX
1h 15mnonstop
American Airlines Logo
2:35 pm - 3:49 pmPHX-ONT
1h 14mnonstop
$242American Airlines
Find Deal
Fri, May 23 - Sun, May 25
 Logo
7:20 pm - 9:36 amONT-PHX
14h 16m2 stops
 Logo
6:00 am - 12:20 pmPHX-ONT
6h 20m1 stop
Fri, May 30 - Mon, Jun 2
 Logo
7:00 am - 3:49 pmONT-PHX
8h 49m2 stops
 Logo
7:50 am - 1:16 pmPHX-ONT
5h 26m1 stop
Wed, May 14 - Fri, May 16
Alaska Airlines Logo
6:00 am - 2:47 pmONT-PHX
8h 47m1 stop
Alaska Airlines Logo
7:00 am - 10:46 pmPHX-ONT
15h 46m2 stops
$308Alaska Airlines
Find Deal
Wed, May 28 - Wed, Jun 4
Alaska Airlines Logo
6:00 am - 2:47 pmONT-PHX
8h 47m1 stop
Alaska Airlines Logo
3:20 pm - 11:57 pmPHX-ONT
8h 37m1 stop
$313Alaska Airlines
Find Deal
Wed, May 28 - Fri, May 30
Expert advice

Expert advice for your flight from Ontario to Phoenix

 
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.
Airlines
American Airlines

Consider Basic Economy for budget-friendly travel with carry-on only and no free checked bags.


Main Cabin Extra offers early boarding and complimentary drinks, ideal for short flights.

Southwest

Enjoy two free checked bags up to 50 pounds each, perfect for travelers with lots of luggage.


Set an alarm to check in 24 hours before for a better boarding position.

Read more about Southwestby Blane Bachelor
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on American Airlines

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Blane Bachelor

Blane Bachelor

Expert on Southwest

Blane Bachelor

Blane Bachelor

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Read more
Useful Info

KAYAK's insights & trends for Ontario to Phoenix flights

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

Find cheap flights to Phoenix Sky Harbor Airport
Find cheap flights to Phoenix Sky Harbor Airport

Planning a trip from Ontario to Phoenix? 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 Phoenix Sky Harbor Airport?

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

If your flying dates are flexible, you should consider flying to Phoenix Sky Harbor Airport on a Friday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from Ontario to Phoenix Sky Harbor Airport. For your return ticket, we recommend flying on a Wednesday and avoiding Sundays for the best deals.

What is the cheapest month to fly from Ontario to Phoenix Sky Harbor Intl Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Phoenix Sky Harbor Intl Airport, 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 Phoenix Sky Harbor Intl Airport is July, where tickets cost $118 (return) on average. On the other hand, the most expensive months are December and March, where the average cost of round-trip tickets is $299 and $271 respectively.

Can I save money by flying with a layover from Ontario to Phoenix Sky Harbor Intl Airport?

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.

No, with an average price for the route of $410, prices are generally cheapest when you fly direct.

How far in advance should I book a flight from Ontario to Phoenix Sky Harbor Intl Airport?

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 Phoenix Sky Harbor Intl Airport, 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 Phoenix Sky Harbor Intl Airport, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 12 weeks before departure.

Good to know

Low seasonJanuary
High seasonMay
Cheapest flight$79
Best time to beat the crowds but there is an average 26% increase in price.
Most popular time to fly and prices are also 19% lower on average.
Flight from Ontario to Phoenix Sky Harbor Airport

When to book flights from Ontario to Phoenix

Are your dates flexible? Find out the best times to travel from Ontario to Phoenix 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 Ontario to Phoenix Sky Harbor Airport flights

  • Where can I park my vehicle at Ontario International Airport?

    Depending on how long your visit to Phoenix is, you can leave your car at the long-term Parking Lot 3, located between Lots 2 and 3 near Terminal 2 and 4. It’s the cheapest on-site parking lot suitable for extended stays and overnight parking.

  • Can I leave Ontario International Airport during a flight delay?

    If you’ve gone through TSA security screening, it’s advisable to stay within the terminal unless advised otherwise by the airport staff. Often delays are resolved quickly, plus there are numerous on-site restaurants and cafeterias where you can wait out the delay.

  • Which car rental companies are at Phoenix Sky Harbor Airport?

    Avis, Budget, Dollar, Thrifty, Enterprise, Hertz, National, and Alamo car rental companies. Their desks are at the Rental Car Center within the Phoenix airport building at 1805 E Sky Harbor Circle, between 16th and 24th St, south of Buckeye Road.

  • Is there a pick-up and drop-off zone at Phoenix Sky Harbor Airport?

    Yes. When ready for pick-up, you can wait on the curb outside the arrivals at Terminal 4 or utilize the free Cell Phone Waiting Lots located on the East and West ends of the airport.

  • What is the cheapest flight from Ontario to Phoenix Sky Harbor Intl Airport?

    In the last 3 days, the lowest price for a flight from Ontario to Phoenix Sky Harbor Intl Airport was $79 for a one-way ticket and $170 for a round-trip.

  • Do I need a passport to fly between Ontario and Phoenix Sky Harbor Airport?

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

  • Which airlines offer Wi-Fi service onboard planes from Ontario to Phoenix Sky Harbor Airport?

    American Airlines, Delta, JetBlue, Hawaiian Airlines, and Alaska Airlines offer inflight Wi-Fi service on the Ontario to Phoenix Sky Harbor Airport flight route.

  • Which aircraft models fly most regularly from Ontario to Phoenix Sky Harbor Airport?

    The Boeing 737 MAX 8 is the aircraft model that flies most regularly on the Ontario to Phoenix Sky Harbor Airport flight route.

  • Which airline alliances offer flights from Ontario to Phoenix Sky Harbor Airport?

    oneworld is the only airline alliance operating flights between Ontario and Phoenix Sky Harbor Airport.

  • On which days can I fly direct from Ontario to Phoenix Sky Harbor Airport?

    There are nonstop flights from Ontario to Phoenix Sky Harbor Airport on a daily basis.

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

    The two airlines most popular with KAYAK users for flights from Ontario to Phoenix are Southwest and American Airlines. With an average price for the route of $258 and an overall rating of 8.0, Southwest is the most popular choice. American Airlines is also a great choice for the route, with an average price of $278 and an overall rating of 7.2.

  • How does KAYAK find such low prices on flights from Ontario to Phoenix Sky Harbor Airport?

    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 Phoenix Sky Harbor Airport.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Phoenix Sky Harbor Airport 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 Phoenix Sky Harbor Airport?

    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 Phoenix Sky Harbor Airport with an airline and back to Ontario with another airline. Booking your flights between Ontario and PHX 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 Phoenix Sky Harbor Airport?

    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 Phoenix Sky Harbor Airport 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 Phoenix Sky Harbor Intl Airport

  • Looking for a cheap flight? 25% of our users found flights on this route for $172 or less one-way and $325 or less round-trip.
  • As Southern California’s full-service airport, Ontario International Airport (ONT) is a favorite with business travelers wishing to escape the congestion at LAX airport. It’s also the airport with the newest amenities, such as spacious twin terminals that allow for fast curbside-to-gate transfers. Still, arriving 2h before your scheduled flight is advisable for a seamless check-in process.
  • You’ll be happy to know that Ontario International Airport welcomes traveling pets. They must be confined within their carriers for safety unless they’re at the Pet Relief zones in Terminals 2 near Gate 210 and Terminal 4 near Gate 410. Phoenix Sky Harbor International (PHX) has nine pet relief areas, most notably, the Paw Pad outside T3, Level 1, and the Bone Yard, west of T4, Level 1, just outside of Baggage Claim.
  • If you need a place to wait for your flight to Phoenix, you can do so in the Ontario USO Lounge inside the old terminal 1 administration building in front of Parking Lot F. Available too are ONT’s two new Aspire Premium Lounges in Terminal 2 and 4 that offer passengers a quiet space to relax and recharge before their flight. While admission fees are applicable, the two lounges are open to everyone irrespective of their travel class or airline.
  • Located in Terminal 2, across Gate 207 and Terminal 4 across Gate 407 at ONT are clean and secure nursing rooms for moms who need some privacy to pump or breastfeed. Phoenix Sky Harbor Airport has two Mamava nursing pods and breastfeeding stations located both pre-and post-security in each terminal. You can access the nursing pod with a code from the downloadable Mamava app.
  • While elevators, washrooms, hydration stations, and parking spaces at Ontario airport are accessible, passengers with disabilities are encouraged to communicate their special needs when making airline reservations through KAYAK. With prior reservation, ONT Skycap Company can provide Meet and Assist services to persons needing mobility assistance. There’re self-service wheelchairs available without pre-arrangement at PHX.

Prefer to fly direct from Ontario to Phoenix Sky Harbor Airport?

Find which airlines fly direct from Ontario Airport to Phoenix Sky Harbor Intl Airport, which days they fly and book direct flights.

Direct departures

Ontario to Phoenix Sky Harbor Intl

Monday

American Airlines, British Airways, Southwest

American Airlines, British Airways, +1 more

Tuesday

American Airlines, British Airways, Southwest

American Airlines, British Airways, +1 more

Wednesday

American Airlines, British Airways, Southwest

American Airlines, British Airways, +1 more

Thursday

American Airlines, British Airways, Southwest

American Airlines, British Airways, +1 more

Friday

American Airlines, British Airways, Southwest

American Airlines, British Airways, +1 more

Saturday

American Airlines, British Airways, Southwest

American Airlines, British Airways, +1 more

Sunday

American Airlines, British Airways, Southwest

American Airlines, British Airways, +1 more

See more direct flights

Direct returns

Phoenix Sky Harbor Intl to Ontario

Monday

American Airlines, British Airways, Southwest

American Airlines, British Airways, +1 more

Tuesday

American Airlines, British Airways, Southwest

American Airlines, British Airways, +1 more

Wednesday

American Airlines, British Airways, Southwest

American Airlines, British Airways, +1 more

Thursday

American Airlines, British Airways, Southwest

American Airlines, British Airways, +1 more

Friday

American Airlines, British Airways, Southwest

American Airlines, British Airways, +1 more

Saturday

American Airlines, British Airways, Southwest

American Airlines, British Airways, +1 more

Sunday

American Airlines, British Airways, Southwest

American Airlines, British Airways, +1 more

See more direct flights
See more direct flights

Top 3 airlines serving from Ontario to Phoenix

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Phoenix. 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 Phoenix? 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 4293 reviews
8.6Crew
7.1Food
8.2Boarding
7.6Entertainment
8.0Comfort
Airline reviews

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

10.0 ExcellentAnonymous, Apr 2025LGB - SMF
Read more Southwest reviews

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

Only one drink pass through the cabin for a 4 hour flight. Quite rough and bumpy landing.

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

I liked the crew member who gave flight instructions on "in case of a problem:. The seats are so small that only a young teenager could sit in middle seat.

Great flight staff. Ease of boarding. Overall, very uneventful and easy trip.

Employees were kind and funny, as always! Flight was late but no announcements were made for people with tight connections to help them transition quickly. No service due to turbulence.

I recently flew Southwest from San Jose to Honolulu. I was very impressed with the flight crew, especially the flight attendant in charge of the front of the plane. She came through the aisle at least five times for drinks and water, and two times for snacks. I have not seen such service since I flew first class. Also, for the first time, they gave us the correct baggage claim number, and the luggage came out quickly. I can't wait for Southwest to have assigned seating! I absolutely hate the Cattle Call boarding procedure and the mad dash to get seats and overhead bins. However, the boarding was efficient.

We had a nice flight. Boarding was easy, our seats were comfortable and the on board service was pleasant.

Service was great, boarding and exiting went smoothly, and the flight was very pleasant.

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.

Very friendly and efficient and smooth boarding. We were even way early arriving at my destination. Thank you.

The trip was very smooth and they provided great customer service

We kept being told that the flight was full and that all overhead compartments were full and therefore had to check in our hand luggage. We were some of the last people to board and noticed that there was still sufficient space in the overhead compartments. We were obliged to check in hand luggage when there was space and so had to wait at luggage retrieval which took a while to then noticed damage to our luggage - not a great experience!

The seats were crammed and the guy in front of me wouldn't stop reclining. If AA is cramming extra rows in, they need to take away the reclining in coach. My knees were smashed for 4 1/2 hours and I was very close to confronting the passenger in front of me.

What, first class and not even a cup of coffee before landing at 5 am in First Class? Really?

I paid for what I got which was cheap, I brought my own entertainment. I knew what to expect, so I could be prepared. If you’re flying economy, check in early like me. I have no problems with my flight, was on time, staff were friendly, and overall good experience.

Customer service in first class does not exist on American Airlines

Flight was delayed due to a steering issue with plane. The delay caused me to miss the connecting flight. The delay caused me to spend an extra 21 hours in airports and flights to get to my destination. The plane issue obviously should have been found and fixed before we even boarded. Ridiculous.

Had to go get beer myself from attendants in the back of the aircraft

My flight back my reservations were list because they said I didn't pay my pet fee when I had a receipt

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….

i was denied boarding, even though i had an assigned seat, checked in on line and was at airport early. Then they refused to fully refund the the fair and replacement fair because they claimed it was "no show/denied boarding". I will never fly this airline again

Frontier had yet another flight cancellation. Have never made a complete round trip with this airline without at least one leg getting cancelled. Miserable flights - dirty, uncomfortable planes that apparently always have issues since I've had multiple delays and cancellations with them.

Flight was delayed 3 times, would have been nice to have received text message instead of email notifications. Frontier app wasn’t even updated accordingly, no gate number disclosed. No agent at front desk of gate to inform of delay. Very confused and left if the dark

They changed the timing , first delayed by 4 hours then went back to 40 mins late, we had to run back to airport to not miss our flight. This is ridiculous

No frills for sure. No gate announcements about flight delay, not even water to drink on the flight.

I loked walking out on the tarmac to board and no first class. I didn't like that they have no snacks or onboard wifi to bide your time.

It was a redeye flight, so every passenger just wanted to sleep, but through the entire flight, the flight crew made announcements over the loudspeaker at maximum volume every few minutes making sleep impossible. For example: it’s 2am, and the crew decides to give an extremely detailed announcement about snacks and beverages for sale. And 3am is the perfect time to wake up everyone with a lengthy announcement about how to get a coffee refill and how to take advantage of new offer from frontier for a credit card.

The takeoff was the smoothest I've ever experienced on any airline and this is the first time I've flown on frontier so this was an extremely pleasant surprise!

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

Information on your arrival and departure airports

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