$55 Cheap Flights from Phoenix (PHX) to Ontario (ONT)

View $55 flight on Sat, Dec 6, 2025Opens in a new window

Popular airlines from Phoenix Sky Harbor Intl. Airport (PHX) to Los Angeles - Ontario Intl. Airport (ONT)

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Today's featured flight deals from Phoenix Sky Harbor Intl. Airport (PHX) to Los Angeles - Ontario Intl. Airport (ONT)

Nonstop
Carry-on included
Lower price than typical

Cheap Flights from Phoenix to Ontario (PHX-ONT)

Prices were available within the past 7 days and start at $55 for one-way flights and $110 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Tue, Jan 27 - Sat, Jan 31
PHX
Phoenix
ONT
Ontario
$110 Roundtrip, found 1 hour ago
$110
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Tue, Jan 27 from Phoenix to Ontario, returning Sat, Jan 31, priced at $110 found 1 hour ago
Frontier Airlines
Thu, Jan 29 - Mon, Feb 2
PHX
Phoenix
ONT
Ontario
$116 Roundtrip, found 1 hour ago
$116
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Thu, Jan 29 from Phoenix to Ontario, returning Mon, Feb 2, priced at $116 found 1 hour ago
Frontier Airlines
Thu, Jan 29 - Mon, Feb 2
PHX
Phoenix
ONT
Ontario
$122 Roundtrip, found 1 hour ago
$122
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Thu, Jan 29 from Phoenix to Ontario, returning Mon, Feb 2, priced at $122 found 1 hour ago
Frontier Airlines
Fri, Jan 30 - Tue, Feb 3
PHX
Phoenix
ONT
Ontario
$124 Roundtrip, found 1 hour ago
$124
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Fri, Jan 30 from Phoenix to Ontario, returning Tue, Feb 3, priced at $124 found 1 hour ago
Frontier Airlines
Sat, Nov 15 - Thu, Nov 20
PHX
Phoenix
ONT
Ontario
$127 Roundtrip, found 22 hours ago
$127
Roundtrip
found 22 hours ago
Select Frontier Airlines flight, departing Sat, Nov 15 from Phoenix to Ontario, returning Thu, Nov 20, priced at $127 found 22 hours ago
Frontier Airlines
Sat, Dec 6 - Sun, Dec 7
PHX
Phoenix
ONT
Ontario
$128 Roundtrip, just found
$128
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, Dec 6 from Phoenix to Ontario, returning Sun, Dec 7, priced at $128 just found
American Airlines
Sat, Dec 13 - Wed, Dec 17
PHX
Phoenix
ONT
Ontario
$231 Roundtrip, just found
$231
Roundtrip
just found
Select American Airlines flight, departing Sat, Dec 13 from Phoenix to Ontario, returning Wed, Dec 17, priced at $231 just found
Southwest Airlines
Sat, Dec 13 - Wed, Dec 17
PHX
Phoenix
ONT
Ontario
$231 Roundtrip, just found
$231
Roundtrip
just found
Select Southwest Airlines flight, departing Sat, Dec 13 from Phoenix to Ontario, returning Wed, Dec 17, priced at $231 just found
Alaska Airlines
Sat, Jan 31 - Mon, Feb 2
PHX
Phoenix
ONT
Ontario
$313 Roundtrip, found 1 hour ago
$313
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Sat, Jan 31 from Phoenix to Ontario, returning Mon, Feb 2, priced at $313 found 1 hour ago
United
Tue, Dec 16 - Wed, Dec 24
PHX
Phoenix
ONT
Ontario
$405 Roundtrip, found 16 hours ago
$405
Roundtrip
found 16 hours ago
Select United flight, departing Tue, Dec 16 from Phoenix to Ontario, returning Wed, Dec 24, priced at $405 found 16 hours ago

Find the cheapest month to fly from Phoenix (PHX) to Ontario (ONT)

September is typically the cheapest month to fly

From $77 - $151 per traveler.

Alternative airports near Ontario

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to John Wayne SNA. Average driving time to city center is 42 minutes. Flights from $116
SNA
John Wayne
Average driving time to city center42 min
Flights from $116

Frequently asked questions

How much does a flight from Sky Harbor Intl. Airport (PHX) to Los Angeles - Ontario Intl. Airport (ONT) cost?
Get a cheap one-way flight from $55 or cheap return flight from $110 from Sky Harbor Intl. Airport (PHX) to Los Angeles - Ontario Intl. Airport (ONT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Sky Harbor Intl. Airport (PHX) to Los Angeles - Ontario Intl. Airport (ONT)?
Planning your getaway for January can help you save, as it's the cheapest month for flights between PHX and ONT. You'll usually find the lowest fares during the off-season.
Which airlines fly direct from Sky Harbor Intl. Airport (PHX) to Los Angeles - Ontario Intl. Airport (ONT)?
Board a direct flight with American Airlines and journey straight from Sky Harbor Intl. Airport (PHX) to Los Angeles - Ontario Intl. Airport (ONT).
What is the cheapest airline that flies from Sky Harbor Intl. Airport (PHX) to Los Angeles - Ontario Intl. Airport (ONT)?
The cheapest airline to offer flights between Sky Harbor Intl. Airport (PHX) and Los Angeles - Ontario Intl. Airport (ONT) will change depending on when you plan to fly. Southwest Airlines and American Airlines are just some of the choices offering reasonable prices. Use Expedia's filters to compare airlines in one place and find the right PHX to ONT flight that fits your budget.
How many flights per day from Sky Harbor Intl. Airport (PHX) to Los Angeles - Ontario Intl. Airport (ONT)?
When flying out of Sky Harbor Intl. Airport (PHX), you'll have a choice from an average of 8 daily direct flights to Los Angeles - Ontario Intl. Airport (ONT).
What are the most popular departure times for flights from Sky Harbor Intl. Airport (PHX) to Los Angeles - Ontario Intl. Airport (ONT)?
More people fly between PHX and ONT at 8 AM than at any other point in the day. Looking to skip the crowds? Pick a flight outside the busiest times and you're likely to save on your ticket as well.
What day of the week has the most flights from PHX to ONT?
Sunday offers the most flights from Sky Harbor Intl. Airport (PHX) to Los Angeles - Ontario Intl. Airport (ONT). Consider jetting off on this day and you'll have the best chance of finding a schedule that works for you.
What is the earliest flight from Sky Harbor Intl. Airport (PHX) to Los Angeles - Ontario Intl. Airport (ONT)?
Hop on the earliest flight at around 8:40AM UTC-7, leaving from Sky Harbor Intl. Airport (PHX). You'll be traveling for roughly 1h 29m, coming in to land at Los Angeles - Ontario Intl. Airport (ONT) at approximately 9:09AM UTC-8.
How long does it take to fly from Sky Harbor Intl. Airport (PHX) to Los Angeles - Ontario Intl. Airport (ONT)?
It takes roughly 1 hour and 24 minutes to cover the 320 mi from PHX to ONT.
What airline has the least delays from PHX to ONT?
With 80% of journeys generally landing on time, American Airlines has the best on-time performance for nonstop flights from Sky Harbor Intl. Airport (PHX) to Los Angeles - Ontario Intl. Airport (ONT). To check your flight status and get notifications about any changes, simply head to the Expedia App.
What is the best time to fly from Sky Harbor Intl. Airport (PHX) to Los Angeles - Ontario Intl. Airport (ONT)?
To land at Los Angeles - Ontario Intl. Airport (ONT) on time, opt for a flight that leaves from Sky Harbor Intl. Airport (PHX) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Ontario from Sky Harbor Intl. Airport (PHX)?
A direct flight from Sky Harbor Intl. Airport (PHX) will take you straight to one of these hubs in Ontario:

  • Los Angeles Intl. Airport (LAX)
  • John Wayne Airport (SNA)
  • Bob Hope Airport (BUR)
  • Los Angeles - Ontario Intl. Airport (ONT)
  • Long Beach Municipal Airport (LGB)

Is it cheaper to buy a plane ticket from Sky Harbor Intl. Airport (PHX) to Los Angeles - Ontario Intl. Airport (ONT) last-minute?
Holding off until just before your departure to book a flight from PHX to ONT generally means paying more. While you may come across some last-minute deals, there's no guarantee. Allow some flexibility in your schedule for a better chance of scoring a bargain.
Is it cheaper to book a PHX to ONT flight and hotel package?
You'll typically save money by booking a PHX to ONT flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one convenient place. Once you've selected your ideal accommodations and flights, consider other add-ons like tours, car rentals and activities.
Can I cancel or change the date of my flight from Sky Harbor Intl. Airport (PHX) to Los Angeles - Ontario Intl. Airport (ONT)?
It's usually possible to reschedule or cancel your PHX to ONT flight. However, for bookings made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find further details on our Customer Service portal.

Travel information

0
Origin airport
Sky Harbor Intl.
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Roundtrip price
$110
Distance
323 mi

Book with confidence

Phoenix to Ontario Flights

The cheapest times to fly from Phoenix to Ontario

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Phoenix to Ontario are during the month of January. You can find some of the cheapest flights from Phoenix to Ontario with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Phoenix to Ontario

Sunday is one of the best days to book for cheap flights from Phoenix to Ontario: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Phoenix to Ontario

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Phoenix to Ontario in 2025. You can also book with separate airlines for your outbound and return journeys, from $55 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Phoenix to Ontario flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Phoenix to Ontario airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Phoenix to Ontario Flights

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*Available to One Key members.