PHX - ONT

$58 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 4/21. 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
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41.299.237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$137
Overall average: $246
Frontier
Sat 3/28Tue 3/31
PHX - ONT • 1 stop
Cheapest non-stop
$157
Typical prices: $134-$319
American Airlines
Wed 3/25Tue 3/31
PHX - ONT • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
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
Top airlines
Frontier
Cheapest • from $137 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Every day
You can fly direct with American Airlines and Southwest. Average duration is 1h 19m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top layover airports
Las Vegas (LAS)
Cheapest • Avg $173 (round-trip)
Las Vegas (LAS)
Shortest trip • 6h 04m (one-way)
Insights
Insights
Insights
Insights
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 43% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
September
Cheapest • 33% price drop
October
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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We hope you love your trip to Ontario!
Flight Deals
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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

Sat, Mar 28 - Tue, Mar 31
Frontier Logo
11:33 am - 6:36 pm
PHX
-
ONT
7h 03m
1 stop
Frontier Logo
2:23 pm - 8:18 pm
ONT
-
PHX
5h 55m
1 stop
$137Frontier
Sat, Apr 25 - Sun, Apr 26
Frontier Logo
6:50 am - 11:55 pm
PHX
-
ONT
17h 05m
1 stop
Frontier Logo
12:59 am - 7:36 am
ONT
-
PHX
6h 37m
1 stop
$142Frontier
Tue, Mar 17 - Tue, Apr 7
Frontier Logo
4:27 pm - 1:28 pm
PHX
-
ONT
21h 01m
1 stop
Frontier Logo
6:20 am - 5:47 pm
ONT
-
PHX
11h 27m
1 stop
$145Frontier
Thu, May 14 - Fri, May 15
Frontier Logo
12:54 pm - 11:55 pm
PHX
-
ONT
11h 01m
1 stop
Frontier Logo
12:59 am - 8:38 am
ONT
-
PHX
7h 39m
1 stop
$146Frontier
Wed, Mar 25 - Wed, Apr 1
Frontier Logo
11:33 am - 9:03 pm
PHX
-
ONT
9h 30m
1 stop
Frontier Logo
10:03 pm - 7:35 am
ONT
-
PHX
9h 32m
1 stop
$152Frontier
Wed, Mar 25 - Tue, Mar 31
American Airlines Logo
5:47 pm - 7:09 pm
PHX
-
ONT
1h 22mnonstop
American Airlines Logo
5:02 pm - 6:25 pm
ONT
-
PHX
1h 23mnonstop
$157American Airlines
Wed, Mar 18 - Tue, Apr 7
Frontier Logo
11:33 am - 9:03 pm
PHX
-
ONT
9h 30m
1 stop
Frontier Logo
6:20 am - 5:47 pm
ONT
-
PHX
11h 27m
1 stop
$158Frontier
Thu, Apr 23 - Sun, Apr 26
Frontier Logo
9:00 am - 4:38 pm
PHX
-
ONT
7h 38m
1 stop
Frontier Logo
12:59 am - 11:45 am
ONT
-
PHX
10h 46m
1 stop
$160Frontier
Thu, Apr 9 - Mon, Apr 13
Frontier Logo
3:01 pm - 11:56 pm
PHX
-
ONT
8h 55m
1 stop
Frontier Logo
11:10 am - 12:11 am
ONT
-
PHX
13h 01m
1 stop
$161Frontier
Thu, Apr 9 - Mon, Apr 13
Frontier Logo
5:06 pm - 11:56 pm
PHX
-
ONT
6h 50m
1 stop
Frontier Logo
11:10 am - 12:11 am
ONT
-
PHX
13h 01m
1 stop
$162Frontier
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.

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, Wednesday is the cheapest day to fly on average and Sunday 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 June, where the average cost of round-trip tickets is $285 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.

No, with an average price for the route of $275, prices are generally cheapest when you fly direct.

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 43% 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

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on American Airlines

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.

Blane Bachelor

Blane Bachelor

Expert on Southwest

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.

Stefanie Waldek

Stefanie Waldek

Expert on Frontier

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.

Laura Ratliff

Laura Ratliff

Expert on PHX

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.

Jennifer Simonson

Jennifer Simonson

Expert on ONT

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.

Good to know

Low seasonDecember
Cheapest flight$58
Best time to beat the crowds but there is an average 11% increase in price.
Most popular time to fly and prices are also 18% 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 $58 for a one-way ticket and $137 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, Delta, Alaska Airlines, 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 $264 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 $85 or less one-way and $171 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 4301 reviews
8.6Crew
8.0Comfort
8.1Boarding
7.5Entertainment
7.0Food
Airline reviews

The charges were ridiculous for an hour flight and the turbulence was very scary.

2.0 MediocreDarcey, Feb 2026
SAN - SJC
Read more Southwest reviews

The charges were ridiculous for an hour flight and the turbulence was very scary.

WIFI was great. My selection for seating is an aisle, but during my trip, I never had an aisle seat. If we can get that corrected, I will be thrilled.

All good except once again bags took an hour at Midway Airport Happens all the time. Ridiculous

3 hour delay. Had to change plans and was still delayed.

The flight crew was extremely rude and especially not helpful when our flight was delayed.

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

The lead steward kept singing about "San Francisco" and hotel California---more annoying than humorous....needs work. Flight was smooth and on time.

Still a fan of open seating. Flight was on schedule and arrived on time. The 737 MAX is very comfortable.

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.

Smooth flight. From the early boarding and all were on board before departure time and arrived early in ONT. Great crew. Thank you!!!!

Lack of gluten free options in food service. I have Celiac disease and it appears you no longer offer special meals for people with dietary restrictions. I am a frequent flyer traveling into and out of Omaha airport. I have noticed over the course of several months that although our flight typically arrives ahead of schedule (awesome job AA!) - we typically sit on the runway for several minutes waiting for the ground crew to get in place. Not sure if it is a ground crew issue or a gate availability issue (due to construction at this airport). Seems to be more of a ground crew being on time issue.

Arriving plane went to wrong gate. Flight Attendant was late. Was in no Hurry when he arrived. Flight was fine. Plane had to wait 20 minutes to get assigned a gate due to designated gate tied up. barely connected.. Boarded extremely late on final leg of trip.

one crew said "he" didn't serve double alcohol drinks for travelers in exit rows. crew on prior flight did. Is this a AA rule, and the prior crew was being nice? Also, I think we deserve more than a 25% refund for losing first class seats when rescheduling a flight due to weather

Amazing I love American. I’ll never fly anyone else if I can help it.

Experience was good. We were delayed in leaving by 15 mins because the flight was waiting on a family that was late in getting to the gate. Food and drink options were as expected. I highly recommend checking in ahead of time using the airline’s app so that it’s quicker to get your luggage tags as soon as you arrive at the terminal. No more waiting in long lines!

The captain brought my 6 year old son into the cockpit and allowed him to ask questions, sit in the captain’s chair and talk about all the gears and levers. Made the trip very special for him.

Better service. No food options, but we did get drinks and a cookie.

it was fine, decent flight... dont get food besides cookies or pretzels so not sure why you ask about food. same for entertainment..

Liked that it was on time. Staff professional and friendly.

Our flight was canceled. I will never use Kayak nor Frontier for travel again. The entire experience was a headache.

Good for a budget airline! It was easy to get on, staff was really nice. Can’t say anything about the food or entertainment because it wasn’t available, which is fine.

It was costly and difficult to check in. $85 to take a small suitcase with me, carry on or checked and $75 on the return trip, Plus $25 if I didn't check my self in check in $25, because I couldn't do it on the kiosk. Small very uncomfortable seats, waited on the runway for near an hour each way. It was my worst flight to date.

Horrible. I would never fly Frontier again. The booking process is tricky at best, but fraudulent in my opinion. Frontier customer service did nothing to rectify my purchase -- I ended up paying more than double what I could have gotten from other airlines and nearly triple what I thought I was buying from Frontier. Their booking practices are unfair to the consumer.

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.

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

Information on your arrival and departure airports