$59 Cheap Flights from Phoenix (PHX) to Ontario (ONT)

View $59 flight on Wed, May 6, 2026Opens in a new window

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

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Cheap Flights from Phoenix to Ontario (PHX-ONT)

Prices were available within the past 7 days and start at $59 for one-way flights and $117 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Tue, May 5 - Wed, May 6
PHX
Phoenix
ONT
Ontario
$117 Roundtrip, found 2 hours ago
$117
Roundtrip
found 2 hours ago
Select Southwest Airlines flight, departing Tue, May 5 from Phoenix to Ontario, returning Wed, May 6, priced at $117 found 2 hours ago
Southwest Airlines
Tue, May 5 - Wed, May 6
PHX
Phoenix
ONT
Ontario
$123 Roundtrip, found 2 hours ago
$123
Roundtrip
found 2 hours ago
Select Southwest Airlines flight, departing Tue, May 5 from Phoenix to Ontario, returning Wed, May 6, priced at $123 found 2 hours ago
Southwest Airlines
Tue, May 5 - Wed, May 6
PHX
Phoenix
ONT
Ontario
$127 Roundtrip, found 2 hours ago
$127
Roundtrip
found 2 hours ago
Select Southwest Airlines flight, departing Tue, May 5 from Phoenix to Ontario, returning Wed, May 6, priced at $127 found 2 hours ago
Southwest Airlines
Tue, Apr 21 - Thu, Apr 30
PHX
Phoenix
ONT
Ontario
$130 Roundtrip, found 9 hours ago
$130
Roundtrip
found 9 hours ago
Select Southwest Airlines flight, departing Tue, Apr 21 from Phoenix to Ontario, returning Thu, Apr 30, priced at $130 found 9 hours ago
American Airlines
Thu, May 14 - Sat, May 16
PHX
Phoenix
ONT
Ontario
$131 Roundtrip, found 3 hours ago
$131
Roundtrip
found 3 hours ago
Select American Airlines flight, departing Thu, May 14 from Phoenix to Ontario, returning Sat, May 16, priced at $131 found 3 hours ago
Southwest Airlines
Tue, May 5 - Wed, May 6
PHX
Phoenix
ONT
Ontario
$132 Roundtrip, found 2 hours ago
$132
Roundtrip
found 2 hours ago
Select Southwest Airlines flight, departing Tue, May 5 from Phoenix to Ontario, returning Wed, May 6, priced at $132 found 2 hours ago
Southwest Airlines
Mon, Apr 13 - Tue, Apr 14
PHX
Phoenix
ONT
Ontario
$134 Roundtrip, found 2 hours ago
$134
Roundtrip
found 2 hours ago
Select Southwest Airlines flight, departing Mon, Apr 13 from Phoenix to Ontario, returning Tue, Apr 14, priced at $134 found 2 hours ago
Frontier Airlines
Thu, Apr 23 - Wed, May 6
PHX
Phoenix
ONT
Ontario
$144 Roundtrip, found 11 hours ago
$144
Roundtrip
found 11 hours ago
Select Frontier Airlines flight, departing Thu, Apr 23 from Phoenix to Ontario, returning Wed, May 6, priced at $144 found 11 hours ago
United
Tue, May 5 - Wed, May 6
PHX
Phoenix
ONT
Ontario
$177 Roundtrip, found 2 hours ago
$177
Roundtrip
found 2 hours ago
Select United flight, departing Tue, May 5 from Phoenix to Ontario, returning Wed, May 6, priced at $177 found 2 hours ago
Alaska Airlines
Wed, Apr 1 - Tue, Apr 7
PHX
Phoenix
ONT
Ontario
$318 Roundtrip, found 16 hours ago
$318
Roundtrip
found 16 hours ago
Select Alaska Airlines flight, departing Wed, Apr 1 from Phoenix to Ontario, returning Tue, Apr 7, priced at $318 found 16 hours ago

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. Cheapest option available. Average driving time to city center is 42 minutes. Flights from $105
SNA
John Wayne
Cheapest
Average driving time to city center42 min
Flights from $105
Select flight to San Bernardino Intl. SBD. Average driving time to city center is 32 minutes. Flights from $477
SBD
San Bernardino Intl.
Average driving time to city center32 min
Flights from $477

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.
0
Flights from Phoenix (PHX) to Ontario (ONT)
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
$117
Distance
323 mi

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 May. 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 2026. You can also book with separate airlines for your outbound and return journeys, from $59 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.

 

Frequently asked questions

How much does a flight from Phoenix, AZ (PHX-Sky Harbor Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) cost?
You can find cheap one-way flights from $59 and cheap return flights from $117 Phoenix, AZ (PHX-Sky Harbor Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) with Expedia. One-way flights usually range from $59 to $1046, and return flights typically cost between $220 and $1291. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Phoenix, AZ (PHX-Sky Harbor Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Phoenix, AZ (PHX-Sky Harbor Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
The cheapest month to fly from PHX to ONT is May when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Phoenix, AZ (PHX-Sky Harbor Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
American Airlines operates around 38 direct flights from PHX to ONT every week.
What is the cheapest airline that flies from Phoenix, AZ (PHX-Sky Harbor Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
American Airlines is one of the cheapest airlines offering nonstop flights from Phoenix (PHX) to Ontario (ONT), with round-trip tickets starting from around $345. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Phoenix, AZ (PHX-Sky Harbor Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
To find a cheap flight from Phoenix, AZ (PHX-Sky Harbor Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Phoenix, AZ (PHX-Sky Harbor Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Phoenix, AZ (PHX-Sky Harbor Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
On average, there are around 10 nonstop flights per day from Sky Harbor Intl. (PHX) to Los Angeles - Ontario Intl. (ONT). For more options, look at flights that include layovers.
What is the earliest flight from Phoenix, AZ (PHX-Sky Harbor Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
The earliest flight from Sky Harbor International Airport (PHX) to Los Angeles - Ontario International Airport (ONT) typically departs at around 12:35 AM, operated by American Airlines. This service operates seasonally in June, July, and August, and an early departure allows you to maximize your time in Ontario. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Phoenix, AZ (PHX-Sky Harbor Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
The most popular departure times for flights from Phoenix, AZ (PHX) to Ontario, CA (ONT) are in the early morning, from 6am to 9am. About 26% of passengers prefer this time window. Many major carriers, including Southwest Airlines and American Airlines, offer flights during this window. This timing works well because it allows travelers to arrive in Ontario early and start their day.
How long does it take to fly from Phoenix, AZ (PHX-Sky Harbor Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
Direct flights from PHX to ONT usually take about 1 hour 20 minutes, traveling roughly 323 miles. If you opt for a connecting flight, expect to add around 5 hours 40 minutes to your journey. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Phoenix, AZ (PHX-Sky Harbor Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
You can fly first class between PHX and ONT. First class cabins are available on:

  • United Airlines
  • American Airlines
  • Delta Air Lines
  • Hawaiian Airlines

How much is a business class flight from Phoenix, AZ (PHX-Sky Harbor Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
A direct, return business class ticket from Phoenix, AZ (PHX) to Ontario, CA (ONT) typically costs between $1,035 - $1,379. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Phoenix, AZ (PHX-Sky Harbor Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) if you opt for a connecting flight.*Prices based on flights available on Expedia in the last year.
How do I earn miles on a Phoenix, AZ (PHX-Sky Harbor Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) flight with Expedia?
It's easy to earn miles on a Phoenix, AZ (PHX-Sky Harbor Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Ontario from Sky Harbor Intl. (PHX)?
If you're planning to travel to Ontario from Sky Harbor Intl. (PHX), you can fly into Los Angeles - Ontario Intl. (ONT) Some flights may connect through major hubs like Los Angeles Intl. (LAX), San Diego Intl. (SAN), John Wayne (SNA) before reaching Ontario. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Phoenix, AZ (PHX-Sky Harbor Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) at the last minute?
Typically, booking a last minute flight from Phoenix, AZ (PHX-Sky Harbor Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Phoenix, AZ (PHX-Sky Harbor Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) flight and hotel package?
Securing a Phoenix, AZ (PHX-Sky Harbor Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) Los Angeles Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Phoenix, AZ (PHX-Sky Harbor Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
If you booked your Phoenix, AZ (PHX-Sky Harbor Intl.) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

*Flight schedules are subject to change.

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*Available to One Key members.