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

View $59 flight on Sat, Nov 7, 2026Opens in a new window

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

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Cheap Flights from Ontario Intl. Airport to Phoenix (ONT-PHX)

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.

American Airlines
Sat, Nov 7 - Wed, Nov 11
ONT
Ontario
PHX
Phoenix
$117 Roundtrip, just found
$117
Roundtrip
just found
Select American Airlines flight, departing Sat, Nov 7 from Ontario to Phoenix, returning Wed, Nov 11, priced at $117 just found
Frontier Airlines
Sat, Nov 7 - Wed, Nov 11
ONT
Ontario
PHX
Phoenix
$123 Roundtrip, just found
$123
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, Nov 7 from Ontario to Phoenix, returning Wed, Nov 11, priced at $123 just found
Frontier Airlines
Thu, Aug 27 - Mon, Aug 31
ONT
Ontario
PHX
Phoenix
$123 Roundtrip, found 1 hour ago
$123
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Thu, Aug 27 from Ontario to Phoenix, returning Mon, Aug 31, priced at $123 found 1 hour ago
Frontier Airlines
Thu, Sep 3 - Sat, Sep 5
ONT
Ontario
PHX
Phoenix
$124 Roundtrip, just found
$124
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Sep 3 from Ontario to Phoenix, returning Sat, Sep 5, priced at $124 just found
Southwest Airlines
Sat, Nov 7 - Wed, Nov 11
ONT
Ontario
PHX
Phoenix
$127 Roundtrip, just found
$127
Roundtrip
just found
Select Southwest Airlines flight, departing Sat, Nov 7 from Ontario to Phoenix, returning Wed, Nov 11, priced at $127 just found
Frontier Airlines
Wed, Sep 16 - Thu, Sep 17
ONT
Ontario
PHX
Phoenix
$128 Roundtrip, just found
$128
Roundtrip
just found
Select Frontier Airlines flight, departing Wed, Sep 16 from Ontario to Phoenix, returning Thu, Sep 17, priced at $128 just found
Frontier Airlines
Thu, Sep 3 - Sat, Sep 5
ONT
Ontario
PHX
Phoenix
$130 Roundtrip, just found
$130
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Sep 3 from Ontario to Phoenix, returning Sat, Sep 5, priced at $130 just found
Southwest Airlines
Fri, Oct 30 - Mon, Nov 2
ONT
Ontario
PHX
Phoenix
$132 Roundtrip, found 8 hours ago
$132
Roundtrip
found 8 hours ago
Select Southwest Airlines flight, departing Fri, Oct 30 from Ontario to Phoenix, returning Mon, Nov 2, priced at $132 found 8 hours ago
United
Sat, Sep 19 - Mon, Sep 21
ONT
Ontario
PHX
Phoenix
$171 Roundtrip, just found
$171
Roundtrip
just found
Select United flight, departing Sat, Sep 19 from Ontario to Phoenix, returning Mon, Sep 21, priced at $171 just found
Alaska Airlines
Tue, Oct 27 - Wed, Nov 4
ONT
Ontario
PHX
Phoenix
$318 Roundtrip, found 9 hours ago
$318
Roundtrip
found 9 hours ago
Select Alaska Airlines flight, departing Tue, Oct 27 from Ontario to Phoenix, returning Wed, Nov 4, priced at $318 found 9 hours ago

Alternative airports near Phoenix

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

Select flight to Sky Harbor Intl. PHX. Cheapest and Closest option available. Average driving time to city center is 10 minutes. Flights from $300
PHX
Sky Harbor Intl.
CheapestClosest
Average driving time to city center10 min
Flights from $300

What you need to know for your flight from Ontario Intl. Airport to Sky Harbor Intl.

Ontario (ONT) to Phoenix (PHX) at a glance

Travel from Ontario (ONT) to Phoenix (PHX) with a range of airlines offering various options on this domestic short-haul route. Whether you prefer a full-service airline or a budget-friendly carrier, you can compare choices that align with your budget and travel schedule. Prepare to explore the renowned attractions and neighborhoods of Phoenix as you seek out the best flights from Ontario to Phoenix, departing from Los Angeles - Ontario International Airport (ONT) to Sky Harbor International Airport (PHX).

  • Fastest flight duration: around 1h 15m non-stop
  • Route distance: roughly 300 miles (485 km)
  • Flights per week: around 35+ flights with multiple daily departures on average
  • Typical fares (one-way): economy tickets often range from $50–$340, depending on seasonality and how far ahead you book

Flights from Los Angeles - Ontario International Airport (ONT) to Sky Harbor International Airport (PHX)

Explore the top airlines flying from Ontario to Phoenix, favored for both non-stop and one-stop options. Common layover spots include Harry Reid International Airport (LAS) with a layover of about 1 hour and 30 minutes, Denver International Airport (DEN) at roughly 2 hours, and San Francisco International Airport (SFO) with a 1 hour and 15-minute layover. These choices allow you to customize your travel experience by balancing price, total journey time, and cabin class to discover the ideal itinerary for your trip.

  • American Airlines: As a full-service airline providing non-stop flights, it holds roughly 51% of the departures on this route. One-way fares generally fall between $50 and $340, with a total travel duration of 1 hour and 15 minutes.
  • Southwest Airlines: This low-cost airline offers both non-stop and one-stop flights, making up about 42% of departures on this route. One-way tickets typically range from $50 to $340, with a direct travel time of around 1 hour and 15 minutes.
  • Frontier Airlines: A budget carrier providing one-stop service, Frontier accounts for approximately 6% of departures. One-way fares usually range from $65 to $175, with an in-flight duration of 2 hours and 30 minutes, leading to a total journey time of about 4 hours, including layover.

Travelers can enhance their journey from Ontario to Phoenix by upgrading to first class. American Airlines provides premium service on this route for a more comfortable experience.

Best time to fly from Ontario (ONT) to Phoenix (PHX)

The most popular months for travelers flying from Ontario to Phoenix are February, March, and April, when peak temperatures in Phoenix reach up to 74.5°F in April. If you prefer quieter travel, consider June, the least busy and relatively cheaper time to visit with fewer crowds and temperatures around 92.3°F. For better deals, September usually offers the lowest average one-way fare around $146. Flight availability peaks in May, with approximately 47 flights per week, making it easier to find convenient departure times. January has the fewest flights, with approximately 25 flights per week.

  • Cheapest time to fly: September usually offers good deals with average one-way fare around $146, roughly 18% cheaper than the yearly average.
  • More budget-friendly months to fly: August, October, and May typically offer average one-way fares of around $153.
  • Most flight options: May has the highest number of flights from Ontario to Phoenix, with approximately 47 flights per week, giving you more flexibility in scheduling your trip.
calendar iconMonthtemperature iconTemperaturecrowd level iconDemandflights iconWeekly Flightsprice iconAverage one-way Fare
January55.4°F (13.0°C)Average25$206
February58.6°F (14.8°C)Moderately High31$191
March66.0°F (18.9°C)Moderately High38$185
April74.5°F (23.6°C)Moderately High40$175
May82.0°F (27.8°C)Average47$157
June92.3°F (33.5°C)Moderately Low35$199
July95.7°F (35.4°C)Moderately Low33$201
August94.8°F (34.9°C)Average40$149
September89.8°F (32.1°C)Average44$146
October77.7°F (25.4°C)Average44$153
November65.5°F (18.6°C)Average40$175
December55.4°F (13.0°C)Moderately Low34$207

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

Alternative route from Ontario (ONT) to Phoenix (PHX)

  • Orange County to Phoenix (SNA-PHX): John Wayne Airport (SNA) is located approximately 31 miles from Los Angeles - Ontario International Airport (ONT). One-way economy ticket prices on this route generally vary from $40 to $305, influenced by the season and your advance booking. Travelers can choose between non-stop and one-stop flights. Major airlines operating on this route include Frontier Airlines, known for its budget-friendly fares, and American Airlines. Additionally, there are options for business and first-class service available on this route.

How to find the best prices for flights from Ontario (ONT) to Phoenix (PHX)

Getting some of the best deals on flights from Ontario to Phoenix is all about timing and flexibility. Here are some key tips to help you save:

  1. Best times to book and fly: cheaper fares are usually available when booking at least two months in advance, although most travelers tend to book between two to eight weeks ahead. Morning departures from 5 am to 12 pm often feature lower prices and are the most popular flight times. Additionally, flying on Thursday typically offers cheaper options, while Friday remains the busiest travel day.
  2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
  3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.*
  4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
  5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
  6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Sky Harbor International Airport from Los Angeles - Ontario International Airport

Phoenix welcomes travelers from Ontario with a range of transport options based on price, convenience, and proximity. Here's how to reach Phoenix efficiently:

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in Phoenix, with private rides that can be arranged in advance.
  • Car rental: Renting a car from Sky Harbor International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Sky Harbor International Airport on Expedia.
  • Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
  • Public transportation: From Sky Harbor International Airport, Terminal 3 Station, a metro station, is conveniently located just 0.1 miles away on foot, while the Phoenix Airport Bus Stop, a bus station, is slightly farther at 0.2 miles away on foot, providing easy access to public transportation options.

Frequently asked questions

How much does a flight from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Phoenix, AZ (PHX-Sky Harbor Intl.) cost?
You can find cheap one-way flights from $59 and cheap return flights from $117 Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Phoenix, AZ (PHX-Sky Harbor Intl.) with Expedia. One-way flights typically cost between $116 and $902, and return flights often range between $227 and $2452. 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 Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Phoenix, AZ (PHX-Sky Harbor 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 Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Phoenix, AZ (PHX-Sky Harbor Intl.)?
The cheapest month to fly from ONT to PHX is November 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 Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Phoenix, AZ (PHX-Sky Harbor Intl.)?
American Airlines offers around 38 weekly direct flights from ONT to PHX.
What is the cheapest airline that flies from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Phoenix, AZ (PHX-Sky Harbor Intl.)?
Southwest Airlines is one of the cheapest airlines offering nonstop flights from Los Angeles - Ontario Intl. (ONT) to Sky Harbor Intl. (PHX), with round-trip tickets starting from around $77. 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 Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Phoenix, AZ (PHX-Sky Harbor Intl.)?
To find a cheap flight from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Phoenix, AZ (PHX-Sky Harbor 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 airline to fly with from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Phoenix, AZ (PHX-Sky Harbor Intl.)?
The best airline to fly with from Ontario, CA (ONT) to Phoenix, AZ (PHX) will differ from traveler to traveler. If you like to fly early, WN offers early morning flights. If price is the most important factor, WN typically offers the lowest fares. WN offers the most daily flights from ONT to PHX, which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Phoenix, AZ (PHX-Sky Harbor 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 Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Phoenix, AZ (PHX-Sky Harbor Intl.)?
On average, there are around 10 nonstop flights per day from Los Angeles - Ontario Intl. (ONT) to Sky Harbor Intl. (PHX). For more options, look at flights that include layovers.
What is the earliest flight from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Phoenix, AZ (PHX-Sky Harbor Intl.)?
The earliest flight from Los Angeles - Ontario International Airport (ONT) to Sky Harbor International Airport (PHX) typically departs at 12:05 AM. This seasonal service is available in May, allowing you to arrive in Phoenix early and start your day. 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 Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Phoenix, AZ (PHX-Sky Harbor Intl.)?
The most popular departure times for flights from Ontario (ONT) to Phoenix (PHX) are in the early morning, from 6am to 9am. About 23% of passengers prefer this time window. Many major carriers, including Southwest Airlines and Frontier Airlines, offer flights during this window. This timing works well because it allows you to arrive in Phoenix early and enjoy the day ahead.
How long does it take to fly from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Phoenix, AZ (PHX-Sky Harbor Intl.)?
A nonstop flight from ONT to PHX typically takes around 1 hour 20 minutes, covering approximately 323 miles. Connecting flights on this route usually add 5 hours 40 minutes to your travel time. 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 Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Phoenix, AZ (PHX-Sky Harbor Intl.)?
First class is available on flights from ONT to PHX. First class cabins are available on:

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

How much is a business class flight from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Phoenix, AZ (PHX-Sky Harbor Intl.)?
A direct, return business class ticket from Ontario, CA (ONT) to Phoenix, AZ (PHX) typically costs between $946 - $1,427. A non-stop, one-way business class flight is usually around $214 - $512. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Phoenix, AZ (PHX-Sky Harbor 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 Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Phoenix, AZ (PHX-Sky Harbor Intl.) flight with Expedia?
It's easy to earn miles on a Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Phoenix, AZ (PHX-Sky Harbor 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 Phoenix from Los Angeles - Ontario Intl. (ONT)?
From Los Angeles - Ontario Intl. (ONT), you can fly into Sky Harbor Intl. (PHX) to reach Phoenix. Some flights may connect through major hubs like San Francisco Intl. (SFO), Sacramento Intl. (SMF), Norman Y. Mineta San Jose Intl. (SJC) before reaching Phoenix. 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 Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Phoenix, AZ (PHX-Sky Harbor Intl.) at the last minute?
Typically, booking a last minute flight from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Phoenix, AZ (PHX-Sky Harbor 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 Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Phoenix, AZ (PHX-Sky Harbor Intl.) flight and hotel package?
Securing a Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Phoenix, AZ (PHX-Sky Harbor Intl.) Phoenix 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 Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Phoenix, AZ (PHX-Sky Harbor Intl.)?
If you booked your Ontario, CA (ONT-Los Angeles - Ontario Intl.) to Phoenix, AZ (PHX-Sky Harbor 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.

Travel information

Origin airport
Ontario Intl. Airport
Destination airport
Sky Harbor Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Roundtrip price
$117
Distance
323 mi
Average flight time
1 hour 15 mins

Book with confidence

Ontario Intl. Airport to Phoenix Flights

The cheapest times to fly from Ontario Intl. Airport to Phoenix

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 Ontario Intl. Airport to Phoenix are during the month of November. You can find some of the cheapest flights from Ontario Intl. Airport to Phoenix with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Ontario Intl. Airport to Phoenix

Sunday is one of the best days to book for cheap flights from Ontario Intl. Airport to Phoenix: 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 Ontario Intl. Airport to Phoenix

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 Ontario Intl. Airport to Phoenix 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 Ontario Intl. Airport to Phoenix 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 Ontario Intl. Airport to Phoenix 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.

 

Ontario Intl. Airport to Phoenix Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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