A range of rugged mountains with snow-capped peaks under a clear sky.

$49 Cheap Flights from Phoenix (PHX) to Ontario Intl. Airport (ONT)

View $49 flight on Mon, Sep 28, 2026Opens in a new window

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

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 30% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

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

Prices were available within the past 7 days and start at $49 for one-way flights and $97 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Sat, Oct 31 - Mon, Nov 2
PHX
Phoenix
ONT
Ontario
$97 Roundtrip, found 1 hour ago
$97
Roundtrip
found 1 hour ago
Select Southwest Airlines flight, departing Sat, Oct 31 from Phoenix to Ontario, returning Mon, Nov 2, priced at $97 found 1 hour ago
American Airlines
Thu, Sep 17 - Mon, Sep 21
PHX
Phoenix
ONT
Ontario
$98 Roundtrip, found 1 hour ago
$98
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Thu, Sep 17 from Phoenix to Ontario, returning Mon, Sep 21, priced at $98 found 1 hour ago
American Airlines
Tue, Sep 29 - Wed, Sep 30
PHX
Phoenix
ONT
Ontario
$99 Roundtrip, found 12 hours ago
$99
Roundtrip
found 12 hours ago
Select American Airlines flight, departing Tue, Sep 29 from Phoenix to Ontario, returning Wed, Sep 30, priced at $99 found 12 hours ago
Southwest Airlines
Tue, Jan 19 - Sat, Jan 23
PHX
Phoenix
ONT
Ontario
$103 Roundtrip, found 3 hours ago
$103
Roundtrip
found 3 hours ago
Select Southwest Airlines flight, departing Tue, Jan 19 from Phoenix to Ontario, returning Sat, Jan 23, priced at $103 found 3 hours ago
Southwest Airlines
Tue, Oct 20 - Thu, Oct 22
PHX
Phoenix
ONT
Ontario
$107 Roundtrip, found 1 hour ago
$107
Roundtrip
found 1 hour ago
Select Southwest Airlines flight, departing Tue, Oct 20 from Phoenix to Ontario, returning Thu, Oct 22, priced at $107 found 1 hour ago
Southwest Airlines
Tue, Sep 29 - Wed, Oct 7
PHX
Phoenix
ONT
Ontario
$108 Roundtrip, found 4 hours ago
$108
Roundtrip
found 4 hours ago
Select Southwest Airlines flight, departing Tue, Sep 29 from Phoenix to Ontario, returning Wed, Oct 7, priced at $108 found 4 hours ago
Southwest Airlines
Fri, Sep 11 - Mon, Sep 14
PHX
Phoenix
ONT
Ontario
$112 Roundtrip, just found
$112
Roundtrip
just found
Select Southwest Airlines flight, departing Fri, Sep 11 from Phoenix to Ontario, returning Mon, Sep 14, priced at $112 just found
United
Tue, Oct 20 - Thu, Oct 22
PHX
Phoenix
ONT
Ontario
$142 Roundtrip, found 1 hour ago
$142
Roundtrip
found 1 hour ago
Select United flight, departing Tue, Oct 20 from Phoenix to Ontario, returning Thu, Oct 22, priced at $142 found 1 hour ago
Frontier Airlines
Tue, Oct 20 - Wed, Oct 21
PHX
Phoenix
ONT
Ontario
$220 Roundtrip, found 3 hours ago
$220
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Tue, Oct 20 from Phoenix to Ontario, returning Wed, Oct 21, priced at $220 found 3 hours ago
Alaska Airlines
Mon, Sep 28 - Mon, Oct 5
PHX
Phoenix
ONT
Ontario
$320 Roundtrip, found 4 hours ago
$320
Roundtrip
found 4 hours ago
Select Alaska Airlines flight, departing Mon, Sep 28 from Phoenix to Ontario, returning Mon, Oct 5, priced at $320 found 4 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. Average driving time to city center is 42 minutes. Flights from $212
SNA
John Wayne
Average driving time to city center42 min
Flights from $212

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

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

Travel between Phoenix (PHX) and Ontario (ONT) with a selection of airlines operating this domestic short-haul route. Evaluate different options from full-service and low-cost carriers to find the flights from Phoenix that align with your budget and schedule as you prepare to explore Ontario's notable attractions and neighborhoods. Get the essential details for flights departing from Sky Harbor International Airport (PHX) to Los Angeles - Ontario International Airport (ONT) for your next adventure.

  • Fastest flight duration: around 1h 15m non-stop
  • Route distance: roughly 300 miles (485 km)
  • Flights per week: around 30+ 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 Sky Harbor International Airport (PHX) to Los Angeles - Ontario International Airport (ONT)

Recent traveler bookings reveal the most popular airlines flying from Phoenix to Ontario, especially for non-stop and one-stop flights. Common layover choices include Harry Reid International Airport (LAS) with a layover of approximately 2 hours and 15 minutes, as well as Denver International Airport (DEN) and Dallas-Fort Worth International Airport (DFW), both featuring about 1 hour and 30 minutes of layover time. This variety allows you to balance price, total travel time, and cabin class to create the ideal itinerary for your journey.

  • American Airlines: A comprehensive carrier providing non-stop flights, with one-way ticket prices generally falling between $50 and $340. This airline represents about 53% of departures on this route, with a total travel time of 1 hour and 15 minutes.
  • Southwest Airlines: A budget-friendly airline that also features non-stop services, offering one-way fares usually between $50 and $340. Southwest accounts for approximately 42% of flights on this route, with a journey duration of 1 hour and 15 minutes.
  • Frontier Airlines: A low-cost option providing one-stop flights, with one-way fares typically ranging from $70 to $175. Frontier makes up around 5% of departures on this route, with 2 hours and 30 minutes of in-flight time and a total travel duration of about 5 hours and 30 minutes, including layovers.

Travelers flying from Phoenix to Ontario can opt for an upgrade, as American Airlines provides first-class service on this route.

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

The most popular months for travelers flying from Phoenix to Ontario are March, April, and September, when peak temperatures in Ontario reach up to 75°F in September. If you prefer quieter travel, consider July, the least busy and relatively cheaper time to visit with fewer crowds and temperatures around 74.3°F. For better deals, September usually offers the lowest average one-way fare around $145. Flight availability peaks in May, with approximately 42 flights per week, making it easier to find convenient departure times. January has the fewest flights, with approximately 21 flights per week.

  • Cheapest time to fly: September usually offers good deals with average one-way fare around $145, roughly 21% cheaper than the yearly average.
  • More budget-friendly months to fly: August and October typically offer average one-way fares of around $155.
  • Most flight options: May has the highest number of flights from Phoenix to Ontario, with approximately 42 flights per week, giving you more flexibility in scheduling your trip.
calendar iconMonthtemperature iconTemperaturecrowd level iconDemandflights iconWeekly Flightsprice iconAverage one-way Fare
January56.3°F (13.5°C)Average21$218
February56.7°F (13.7°C)Average25$203
March59.0°F (15.0°C)Moderately High31$181
April62.6°F (17.0°C)Moderately High32$183
May65.3°F (18.5°C)Average42$169
June69.8°F (21.0°C)Moderately Low31$208
July74.3°F (23.5°C)Moderately Low30$205
August75.7°F (24.3°C)Average34$153
September75.0°F (23.9°C)Moderately High39$145
October69.6°F (20.9°C)Average41$157
November62.6°F (17.0°C)Average33$176
December55.9°F (13.3°C)Moderately Low28$208

*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 Phoenix (PHX) to Ontario (ONT)

  • Phoenix to Orange County (PHX-SNA): John Wayne Airport (SNA) is located approximately 31 miles from Los Angeles - Ontario International Airport (ONT). One-way fares in economy class on this route generally fall between $40 and $300, influenced by the season and timing of your booking. Travelers can choose between non-stop and one-stop flight options. Leading airlines on this route are Frontier Airlines, known for its low fares, and American Airlines. Additionally, there are business and first class services available for those seeking a more premium experience.

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

Getting some of the best deals on flights from Phoenix to Ontario 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 typically 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 a.m. to 12 p.m., generally offer lower prices and are the most popular flight times, while flying on Thursday usually provides cheaper options, despite Sunday being 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 Los Angeles - Ontario International Airport from Sky Harbor International Airport

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

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in Ontario, with options including free hotel shuttles and private rides, which can be arranged in advance with your hotel.
  • Car rental: Renting a car from Los Angeles - Ontario International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Los Angeles - Ontario 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 Los Angeles - Ontario International Airport, Panama City Seaport, a seaport, is located about 1.6 miles away by car, while Rancho Cucamonga Station, a train station, is situated approximately 3.7 miles away by car, providing convenient transport options for travelers.

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 $49 and cheap return flights from $97 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 October 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.

Travel information

Origin airport
Sky Harbor Intl.
Destination airport
Ontario Intl. Airport
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Roundtrip price
$97
Distance
323 mi
Average flight time
1 hour 11 mins

Book with confidence

Phoenix to Ontario Intl. Airport Flights

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

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

 

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

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

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 Intl. Airport in 2026. You can also book with separate airlines for your outbound and return journeys, from $49 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 Intl. Airport 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 Intl. Airport 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 Intl. Airport Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

Explore a world of travel with Expedia