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Cheap flights from Ontario International to Phoenix Sky Harbor

Compare Ontario International to Phoenix Sky Harbor flight deals

Find the cheapest month or even day of the year to fly to Phoenix Sky Harbor

Book the best Phoenix Sky Harbor fare with no extra fees

Flight deals from Ontario International to Phoenix Sky Harbor

Looking for a cheap last-minute deal or the best round-trip flight from Ontario International to Phoenix Sky Harbor? Find the lowest prices on one-way and round-trip tickets right here.
Phoenix.C$133 per passenger.Departing Wed, Dec 10, returning Sat, Jan 10.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Ontario International on Wed, Dec 10, arriving in Phoenix Sky Harbor.Inbound direct flight with Southwest Airlines departing from Phoenix Sky Harbor on Sat, Jan 10, arriving in Ontario International.Price includes taxes and charges.From C$133, select.
Phoenix.C$133 per passenger.Departing Thu, Jan 15, returning Tue, Jan 20.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Ontario International on Thu, Jan 15, arriving in Phoenix Sky Harbor.Inbound direct flight with Southwest Airlines departing from Phoenix Sky Harbor on Tue, Jan 20, arriving in Ontario International.Price includes taxes and charges.From C$133, select.
Phoenix.C$133 per passenger.Departing Sat, Nov 8, returning Sat, Nov 8.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Ontario International on Sat, Nov 8, arriving in Phoenix Sky Harbor.Inbound direct flight with Southwest Airlines departing from Phoenix Sky Harbor on Sat, Nov 8, arriving in Ontario International.Price includes taxes and charges.From C$133, select.
Phoenix.C$133 per passenger.Departing Wed, Oct 1, returning Mon, Oct 6.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Ontario International on Wed, Oct 1, arriving in Phoenix Sky Harbor.Inbound direct flight with Southwest Airlines departing from Phoenix Sky Harbor on Mon, Oct 6, arriving in Ontario International.Price includes taxes and charges.From C$133, select.
Phoenix.C$133 per passenger.Departing Sat, Sep 27, returning Sat, Oct 4.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Ontario International on Sat, Sep 27, arriving in Phoenix Sky Harbor.Inbound direct flight with Southwest Airlines departing from Phoenix Sky Harbor on Sat, Oct 4, arriving in Ontario International.Price includes taxes and charges.From C$133, select.
Phoenix.C$134 per passenger.Departing Wed, Sep 24, returning Sat, Sep 27.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Ontario International on Wed, Sep 24, arriving in Phoenix Sky Harbor.Inbound direct flight with Southwest Airlines departing from Phoenix Sky Harbor on Sat, Sep 27, arriving in Ontario International.Price includes taxes and charges.From C$134, select.
Phoenix.C$134 per passenger.Departing Sat, Oct 25, returning Sat, Nov 8.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Ontario International on Sat, Oct 25, arriving in Phoenix Sky Harbor.Inbound direct flight with Southwest Airlines departing from Phoenix Sky Harbor on Sat, Nov 8, arriving in Ontario International.Price includes taxes and charges.From C$134, select.
Phoenix.C$134 per passenger.Departing Thu, Nov 27, returning Thu, Dec 4.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Ontario International on Thu, Nov 27, arriving in Phoenix Sky Harbor.Inbound direct flight with Southwest Airlines departing from Phoenix Sky Harbor on Thu, Dec 4, arriving in Ontario International.Price includes taxes and charges.From C$134, select.

Find the cheapest month to fly from Ontario International to Phoenix Sky Harbor

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Ontario International to Phoenix Sky Harbor flights are currently cheapest in October.
Sep
from C$134
Oct
from C$133
Nov
from C$133
Dec
from C$134
Jan
from C$133
Feb
from C$161
Mar
from C$385
Apr
from C$440
May
from C$439
Jun
Find prices
Jul
Find prices
Aug
Find prices

Direct flights from Ontario International to Phoenix Sky Harbor

Ontario International to Phoenix Sky Harbor: Alternative routes

Compare routes from Ontario International to Phoenix below. You may find an airport to fly into that's cheaper, faster, or easier than Phoenix Sky Harbor.

Ontario to Phoenix: Flight information

The things to know before you go.
Cheapest flight foundC$133
Cheapest month to flyNovember
Average flight time1 hr, 19 mins
Most popular airlineSouthwest Airlines
Average flights per week80

Finding cheap flights from Ontario International to Phoenix Sky Harbor: Frequently asked questions

The best price we found for a round-trip flight from Ontario International to Phoenix Sky Harbor is C$133. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
1 hour and 19 minutes is the average flight time from Ontario International to Phoenix Sky Harbor.
Southwest Airlines, American Airlines and SkyWest Airlines fly direct from Ontario International to Phoenix Sky Harbor.
There are 80 flights per week flying from Ontario International to Phoenix Sky Harbor, as of September 2025.
The cheapest month to fly from Ontario International to Phoenix Sky Harbor is usually November.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Ontario International Airport to Phoenix Sky Harbor Airport on Saturday, November 8, 2025.
Yes – the average flight time is 1 hour and 19 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Phoenix Sky Harbor but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Phoenix is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Southwest Airlines offers the cheapest flight tickets to Phoenix Sky Harbor.

Flying from Ontario International Airport (ONT) to Phoenix Sky Harbour International Airport (PHX): what you need to know

  • Around 1 hour 20 minutes is how long you'll be travelling on a direct flight from Ontario International Airport to Phoenix Sky Harbour International Airport.

  • Ontario and Phoenix are in the same timezone, UTC-7.

  • Every week, there are 69 Ontario International Airport to Phoenix Sky Harbour International Airport flights. If you want to take off as soon as possible, pick the 05:05 Southwest Airlines flight. If you're eager to make the most of your time before flying, the last flight is at 22:59 with Frontier Airlines.

  • Your ONT to PHX flight won't wait if you're running late, so don't forget to check in on time. Arrive up to one hour in advance for domestic flights and two hours ahead when you're travelling internationally.

  • Travelling during a peak time like August? Public holidays and other popular periods can lead to longer lines at security. Play it safe and arrive up to four hours before an international flight and two hours before domestic departures.

  • With direct flights from Ontario International Airport to Phoenix Sky Harbour International Airport available from numerous airlines, flying to Phoenix (and then other destinations in United States) is a breeze. Here's who you can travel nonstop with:

  • The majority of passengers choose to travel with American Airlines on this route.

  • American Airlines is a leader in on-time performance for ONT to PHX flights, with 90.33% of services reaching their destination on schedule.

  • If you want to break up your flight, just deselect 'Direct flights only' when searching for your ticket from Ontario International Airport to Phoenix Sky Harbour International Airport. Here are the most popular stopovers between ONT and PHX:

    • Harry Reid Airport (formerly McCarran Airport)

    • Sacramento International Airport

    • Metropolitan Oakland International Airport

How to find the cheapest flights from Ontario International Airport (ONT) to Phoenix Sky Harbour International Airport (PHX)

  • C$67 is the best price for a one-way Ontario International Airport to Phoenix Sky Harbour International Airport flight. A return flight starts at C$133. These prices may change based on availability and demand.

  • Book six months before travelling. After crunching the numbers on our calendar, this is how far you'll want to book ahead to secure cheap tickets from ONT to PHX.

  • May is the cheapest month for flights from Ontario International Airport to Phoenix Sky Harbour International Airport. If you're looking to fly during a different time of year, the 'Whole month' tool will give you the lowest prices for every month.

  • Picking up cheap flights from ONT to PHX couldn't be easier with Price Alerts. All you need to do is set up one of these automatic alerts and we'll notify you when fares go down.

  • Lock in the perfect flight for you with the help of the filters. To see the 'Best,' 'Fastest' or 'Cheapest' flights from Ontario International Airport to Phoenix Sky Harbour International Airport, use the 'Sort by' function. You can also filter by airline, arrival and departure times, and number of stops.

Handy information about Ontario International Airport (ONT)

  • You'll find ONT at 2900 E. Airport Drive.

  • Ontario International Airport scores high marks for on-time performance. 83.6% of flights that take off from ONT reach their destination on time.

  • To reach Ontario International Airport from central Ontario, it'll take about 10 minutes if you're going by car. Of course, this depends on traffic. It's approximately 6 kilometres from the airport to the city centre.

  • You can expect a journey time of about 1 hour 30 minutes when using public transport.

  • Searching for a convenient hotel near ONT? If you're catching an early flight from Ontario International Airport to Phoenix Sky Harbour International Airport, these stays will have you moments from your departure lounge:

Arriving at Phoenix Sky Harbour International Airport (PHX)

Getting from Phoenix Sky Harbour International Airport (PHX) to central Phoenix

  • PHX is located at 3400 Sky Harbour Boulevard.

  • From Phoenix Sky Harbour International Airport, Phoenix is approximately 8 kilometres away. It takes around 10 minutes to get to the centre driving.

  • It'll take around 35 minutes when travelling by public transport.

When to fly to Phoenix Sky Harbour International Airport (PHX)

  • It's time to plan your travel dates for your flight from Ontario International Airport to Phoenix Sky Harbour International Airport. July is the most popular month to visit Phoenix. If you prefer a more low-key vibe, go in May.

  • Before locking in your flight from Ontario International Airport to Phoenix Sky Harbour International Airport, consider the kind of weather you enjoy. July is the warmest month in Phoenix, with the temperature ranging from 26ºC (79ºF) to 44ºC (111ºF).

  • Search for cheap tickets from ONT to PHX in January if you want to travel in cooler conditions. Temperatures are at their lowest around then, ranging between 4ºC (39ºF) and 20ºC (68ºF) on average.

Explore more of United States

  • Phoenix is always a good idea, but there are so many other corners of United States just waiting to be discovered. Around 483 kilometres west of Phoenix, a trip to San Diego will keep you on the move. Start with leading sights like San Diego Zoo, USS Midway Museum and SeaWorld San Diego.

  • Las Vegas is another standout destination in United States and is around 418 kilometres north-west of Phoenix. No journey is complete without visiting Las Vegas Strip, Fountains of Bellagio and Fremont Street Experience.

Plan the rest of your trip from Ontario to Phoenix

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.