PHX - ONT

$45 Find Cheap Flights from Phoenix to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Phoenix to Ontario departing on 2/14. 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
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Ontario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Phoenix to Ontario, 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 Phoenix to Ontario, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$110
Overall average: $245
Frontier
Wed 1/7Thu 1/15
PHX - ONT • 1 stop
Cheapest non-stop
$231
Typical prices: $218-$342
American Airlines
Wed 1/7Sat 1/10
PHX - ONT • Non-stop
Our travelers' advice
AI-generated summary based on content written by travel experts
Choose Southwest for two free checked bags on this route.
Use the ONT Connect Shuttle for easy airport access.
Expert advice
Expert advice
Expert advice
Expert advice
Video guide: How to find cheap flights to Ontario
Watch video
Watch video
Watch video
Watch video
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 53% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
September
Cheapest • 34% price drop
October
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Ontario!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Phoenix to Ontario (PHX-ONT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Phoenix to Ontario 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.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Phoenix to Ontario

Wed, Jan 7 - Thu, Jan 15
Frontier Logo
4:41 pm - 11:14 pmPHX-ONT
7h 33m1 stop
Frontier Logo
10:29 pm - 8:20 amONT-PHX
8h 51m1 stop
$110Frontier
Find Deal
Wed, Jan 7 - Sat, Jan 10
Frontier Logo
4:41 pm - 11:14 pmPHX-ONT
7h 33m1 stop
Frontier Logo
7:00 am - 8:06 amONT-PHX
24h 06m1 stop
$116Frontier
Find Deal
Thu, Dec 4 - Sat, Dec 6
Frontier Logo
10:26 pm - 2:25 pmPHX-ONT
16h 59m1 stop
Frontier Logo
6:15 am - 6:31 pmONT-PHX
11h 16m1 stop
$122Frontier
Find Deal
Wed, Dec 3 - Sat, Dec 6
Frontier Logo
7:43 pm - 2:04 pmPHX-ONT
19h 21m1 stop
Frontier Logo
3:20 pm - 12:44 amONT-PHX
8h 24m1 stop
$123Frontier
Find Deal
Fri, Jan 23 - Mon, Jan 26
Frontier Logo
1:20 pm - 12:20 amPHX-ONT
12h 00m1 stop
Frontier Logo
6:20 am - 6:24 pmONT-PHX
11h 04m1 stop
$124Frontier
Find Deal
Sat, Dec 6 - Sun, Dec 7
Frontier Logo
9:16 am - 2:25 pmPHX-ONT
6h 09m1 stop
Frontier Logo
2:59 pm - 12:31 amONT-PHX
8h 32m1 stop
$125Frontier
Find Deal
Sat, Dec 6 - Sun, Dec 7
Frontier Logo
7:00 am - 2:25 pmPHX-ONT
8h 25m1 stop
Frontier Logo
2:59 pm - 12:31 amONT-PHX
8h 32m1 stop
$126Frontier
Find Deal
Fri, Jan 9 - Mon, Jan 12
Frontier Logo
6:25 pm - 11:56 pmPHX-ONT
6h 31m1 stop
Frontier Logo
2:34 pm - 9:30 pmONT-PHX
5h 56m1 stop
$128Frontier
Find Deal
Sat, Dec 6 - Sun, Dec 7
Frontier Logo
7:00 am - 2:25 pmPHX-ONT
8h 25m1 stop
Frontier Logo
2:59 pm - 12:31 amONT-PHX
8h 32m1 stop
$129Frontier
Find Deal
Fri, Dec 12 - Sat, Dec 13
Frontier Logo
9:16 am - 2:25 pmPHX-ONT
6h 09m1 stop
Frontier Logo
6:15 am - 1:47 pmONT-PHX
6h 32m1 stop
$130Frontier
Find Deal
Booking Insights

KAYAK's insights & trends for Phoenix to Ontario flights

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

Find cheap flights to Ontario
Find cheap flights to Ontario

Planning a trip from Phoenix to Ontario? 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 Phoenix to Ontario?

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

For Phoenix to Ontario, Sunday is the cheapest day to fly on average and Tuesday is the most expensive. Flying from Ontario back to Phoenix, the best deals are generally found on Wednesday, with Sunday being the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Phoenix Sky Harbor Intl Airport to Ontario, 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 Phoenix Sky Harbor Intl Airport to Ontario is September, where tickets cost $158 (return) on average. On the other hand, the most expensive months are November and December, where the average cost of round-trip tickets is $307 and $284 respectively.

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

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.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $300 on average.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Phoenix Sky Harbor Intl Airport to Ontario, 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 Phoenix Sky Harbor Intl Airport to Ontario, you should book around 4 weeks before departure, which saves you about 53% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 17 weeks before departure.

Expert advice

Expert advice for your flight from Phoenix to Ontario

 
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
Southwest

Southwest offers free carry-on and personal item, but checked bags now incur fees.


Southwest's early boarding available with extra legroom seats, offering 34 inches of legroom.

American Airlines

Consider Main Cabin Extra for early boarding and complimentary drinks on short flights.


Download the American Airlines app for in-flight entertainment on your device.

Frontier

Opt for the Economy Bundle for a carry-on and seat selection at a budget-friendly price.


Pay for seat selection to avoid middle seats, especially with Basic Fare.

Airports
PHX

PHX offers touchless parking and valet services near Terminals 3 and 4, ideal for quick departures.

ONT

At ONT, the ONT Connect Shuttle links Rancho Cucamonga Station to the airport, included in the Metrolink fare.

Our travel experts
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
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
Stefanie Waldek

Stefanie Waldek

Expert on Frontier

Stefanie Waldek

Stefanie Waldek

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more
Laura Ratliff

Laura Ratliff

Expert on PHX

Laura Ratliff

Laura Ratliff

Laura Ratliff is a New York-based writer and editor. She lives in downtown Brooklyn with her husband and their beloved dogs. Originally from Texas, she now considers New York City her home. She typically spends more than 200,000 miles on a plane each year and stays in plenty of hotels.

Read more
Jennifer Simonson

Jennifer Simonson

Expert on ONT

Jennifer Simonson

Jennifer Simonson

Jennifer Simonson is driven by her lifelong commitment to exploring the globe. Her insatiable curiosity had led her to immerse herself into diverse locations like Oklahoma City and Pismo. Her hotel recommendations are the result of the myriad hotels she's stayed at across her travels. Along her journey, she cherishes engaging conversations with locals, indulging in the finest ice cream, trying her hand at surfing, and embarking on nature-filled hikes.

Read more

Good to know

Low seasonFebruary
Cheapest flight$45
Best time to beat the crowds but there is an average 13% increase in price.
Most popular time to fly and prices are also 19% lower on average.
Flight from Phoenix to Ontario

When to book flights from Phoenix to Ontario

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

  • Which is the best way to get to downtown Ontario from Ontario International Airport (ONT)?

    The city center of Ontario lies about 2.4 miles from Ontario International Airport (ONT), and taxis provide the quickest means to get there in about 10 minUTES. Still, if you’re commuting on a tight budget, you can hop onto a Metro bus, which takes approximately 12 minutes to cover the distance between the two points.

  • Are there car rentals at Ontario International Airport (ONT)?

    Nothing beats the convenience of leaping into an adventure in a car, immediately you land in Ontario from Phoenix. Multiple car rental agencies, such as Avis and Hertz, run their desks at this facility. To locate the car rental garages, go past the baggage claim area, then downstairs to the street level, before exiting the terminal. A free airport shuttle will then drop you at the pickup garage.

  • Are there accessible services at Ontario International Airport (ONT)?

    ONT caters to the needs of disabled passengers and persons with limited mobility from PHX. ONT, in collaboration with the California Relay Service, renders essential services to travelers who are speech-disabled or deaf to navigate the airport. Also, standard amenities such as restrooms are wheelchair accessible.

  • Does ONT have nursing rooms?

    Mothers and their little ones arriving at ONT from PHX will find nursing and lactation suites at their disposal. The rooms feature benches and sinks and provide the needed privacy when pumping and breastfeeding. They’re located in Terminal 2, second floor, near women’s restrooms.

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

    In the last 3 days, the lowest price for a flight from Phoenix Sky Harbor Intl Airport to Ontario was $45 for a one-way ticket and $110 for a round-trip.

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

    A passport is not required to fly from Phoenix to Ontario.

  • Which airports will I be using when flying from Phoenix to Ontario?

    Phoenix airport is called Phoenix Sky Harbor Intl and the only airport in Ontario is Ontario.

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

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

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

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

  • Which airline alliances offer flights from Phoenix to Ontario?

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

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

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

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

    The two airlines most popular with KAYAK users for flights from Phoenix to Ontario are Southwest and American Airlines. With an average price for the route of $273 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 $276 and an overall rating of 7.2.

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

    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 Phoenix to Ontario.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Phoenix 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 Phoenix to Ontario?

    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 Ontario with an airline and back to Phoenix with another airline. Booking your flights between Phoenix and ONT 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 Phoenix to Ontario?

    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 Ontario from Phoenix 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 Phoenix Sky Harbor Intl Airport to Ontario

  • Looking for a cheap flight? 25% of our users found flights on this route for $175 or less one-way and $287 or less round-trip.
  • Those flying aboard American Airlines from Phoenix to Ontario should remember that the carrier runs its hub at Phoenix Sky Harbor International Airport (PHX). You’ll depart through Terminal 4, on Concourses A and B of this facility. Still, you can access the Admirals Club on Concourse B between Gates A19 and A21. Members will enjoy priority clearance under the fast lane program.
  • Several licensed car and shuttle companies run their services from Phoenix Sky Harbor International Airport (PHX) to other destinations within and beyond this property. Most of their counters are at the passenger terminals, parking lots, and consolidated car rental centers. You can thus contact your preferred provider to pick up and drop you at the airport.
  • If you’re leaving Phoenix for Ontario via Phoenix Sky Harbor International Airport, remember that the establishment has two Terminals; 3 and 4. Terminal 3 serves those flying aboard Delta or JetBlue airlines, while Terminal 4 is dedicated to all international departures and arrivals. A free PHX Sky Train facilitates movement from one terminal to another, extending to the East Economy Parking and Valley Metro Rail.
  • If you wish to drop off your car before flying from Phoenix to Ontario, you’ll have several parking options, including on-site parking which is easy and convenient. By scanning the QR code from your mobile, you’ll enjoy the touchless entry/exit option, which makes your work easier. Also, the Terminal Garages are a few steps from your gate.
  • Travelers planning to depart to Ontario from Phoenix might find it helpful to sleep in hotels adjacent to Phoenix Sky Harbor Airport (PHX). Hilton Phoenix Airport and Hilton Garden Inn Phoenix Airport North are two such hotels offering courtesy shuttles to and from the airport. You’ll thus be able to reach the terminal in time for your departure.

Prefer to fly direct from Phoenix to Ontario?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Phoenix Sky Harbor Intl to Ontario.
Find which airlines fly direct from Phoenix Sky Harbor Intl Airport to Ontario Airport, which days they fly and book direct flights.

Direct departures

Phoenix Sky Harbor Intl to Ontario

Monday

American Airlines, Southwest

American Airlines, Southwest

Tuesday

American Airlines, Southwest

American Airlines, Southwest

Wednesday

American Airlines, Southwest

American Airlines, Southwest

Thursday

American Airlines, Southwest

American Airlines, Southwest

Friday

American Airlines, Southwest

American Airlines, Southwest

Saturday

American Airlines, Southwest

American Airlines, Southwest

Sunday

American Airlines, Southwest

American Airlines, Southwest

See more direct flights

Direct returns

Ontario to Phoenix Sky Harbor Intl

Monday

American Airlines, Southwest

American Airlines, Southwest

Tuesday

American Airlines, Southwest

American Airlines, Southwest

Wednesday

American Airlines, Southwest

American Airlines, Southwest

Thursday

American Airlines, Southwest

American Airlines, Southwest

Friday

American Airlines, Southwest

American Airlines, Southwest

Saturday

American Airlines, Southwest

American Airlines, Southwest

Sunday

American Airlines, Southwest

American Airlines, Southwest

See more direct flights

Reviews of the top 3 airlines serving from Phoenix to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Phoenix to Ontario. 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 Phoenix to Ontario? 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 4244 reviews
7.0Food
7.5Entertainment
8.1Boarding
8.0Comfort
8.6Crew
Airline reviews

San Diego airport is brand new, spacious, airy and very smooth checkin at SW baggage drop.

10.0 ExcellentGordon, Nov 2025SAN - OAK
Read more Southwest reviews

San Diego airport is brand new, spacious, airy and very smooth checkin at SW baggage drop.

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

Delays delays delays. Late taking off, late landing, wait for a gate, etc.

mandatory demand customer to check their carry on because not enough people check bags.

Connecting flight is on time and boarding was a breeze!

Very smooth checking in our luggage with a super pleasant SW agent. I enjoyed a fun entertaining movie.

First time traveling on Southwest since bag fees were implemented. Usual good service. Just more expensive now.

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

Boarding process, crew were good. But the seats were so uncomfortable that was all I could focus on. I literally had to sit forward so that all 3 of us could fit in row. I will try to avoid Southwest in the future for any flights over 60 minutes.

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

More choices on snacks. Built-in video screen to enjoy entertainment choices.

Loved the crew . Absolutely no complaints. Except for luggage lost

this plane was really old, had exit row seats and tray was in arm of seat so super uncomfortable to use. another seat they could t even use the tray it was broke. seat i. front of me had duct tape on it cause seat was ripped open... this plane should either be updated or retired.

We are too tired and frustrated to comment politely at this point

Ring in first class for an overnight flight, there was no blankets nor pillows for first class customers.

I didn't like that my paid for seat was changed 2 hours before my flight.

Overall, a good experience. The food, however, was subpar. The breakfast was a joke.

First world problems, but still… We were seated in first class and asked for a cocktail on a very short, 50 minute flight. After our drink order was taken, a half hour went by, and we noticed that every other person in the small plane had been served except for us. We got up to ask about it, the drinks finally came, then were taken away three minutes later since the flight was so short. Really strange situation, on the other hand, we were in Utah.

Boarding took forever, the plane was cramped and cold, and the seatbelt song came on constantly throughout the red eye flight with a loud pre-recorded message playing each time

Wonderful crew and early arrival to our destination. It was so nice to have free wifi access and movies too. Thank you!

Terrible. The canceled my entire flight when I requested a refund for a trip frontier canceled trip one way.

i was unable to check in the flight. refund requested

I think Frontier was very good at communication. Their app worked very well. Loading was great and the flight was nice and easy.

Great for the price. No wifi or entertainment, but gate agents and crew were fantastic and we boarded quickly and left on time.

Decent clean onboard experience. Okay discount airline experience. Unfortunately, any customer service interactions are difficult and unhelpful. There is no service. Also, a premium seat only gets you premium boarding if you line up first. Once they start general boarding you must go to the back of the line. Not very premium

The crew was mostly okay. The flight attendant who answered our questions was curt and unhelpful unfortunately. He seemed upset and I understand having off days.

Very bad! No good service delayed my second connection flight

They canceled flight. Hard to believe there was even a plane incoming for us to get on

Plane was down graded and I lost my uncharged exit row with more leg room. No mention or offer of refund from podium. Flight attendant was nice to explain this happens often and that I could request a refund via online form submission. I did this and have heard nothing back.

Horrendous. I do not recommend Frontier. The passengers lack manners and decency, and the flight attendants lack professionalism. If I wasn’t in a bind to fly with 48 hours notice for a job interview, I would not have selected a flight with Frontier and I never plan to fly with them in the future.

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

Information on your arrival and departure airports