Cheap flights from Ontario International to Phoenix

Compare Ontario International to Phoenix flight deals

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Flight deals from Ontario International to Phoenix

Looking for a cheap last-minute deal or the best round-trip flight from Ontario International Airport to Phoenix? If you want to travel next month, round-trip fares start from $96. Find the lowest prices on one-way and round-trip tickets right here.

Phoenix.$96 per passenger.Departing Tue, Dec 8, returning Wed, Jan 6.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Ontario International on Tue, Dec 8, arriving in Phoenix Sky Harbor.Inbound direct flight with Southwest Airlines departing from Phoenix Sky Harbor on Wed, Jan 6, arriving in Ontario International.Price includes taxes and charges.From $96, select.

Phoenix.$96 per passenger.Departing Tue, Dec 1, returning Tue, Dec 8.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Ontario International on Tue, Dec 1, arriving in Phoenix Sky Harbor.Inbound direct flight with Southwest Airlines departing from Phoenix Sky Harbor on Tue, Dec 8, arriving in Ontario International.Price includes taxes and charges.From $96, select.

Phoenix.$96 per passenger.Departing Wed, Sep 2, returning Thu, Sep 3.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Ontario International on Wed, Sep 2, arriving in Phoenix Sky Harbor.Inbound direct flight with Southwest Airlines departing from Phoenix Sky Harbor on Thu, Sep 3, arriving in Ontario International.Price includes taxes and charges.From $96, select.

Phoenix.$96 per passenger.Departing Mon, Nov 2, returning Thu, Nov 5.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Ontario International on Mon, Nov 2, arriving in Phoenix Sky Harbor.Inbound direct flight with Southwest Airlines departing from Phoenix Sky Harbor on Thu, Nov 5, arriving in Ontario International.Price includes taxes and charges.From $96, select.

Phoenix.$96 per passenger.Departing Sat, Oct 10, returning Mon, Oct 12.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Ontario International on Sat, Oct 10, arriving in Phoenix Sky Harbor.Inbound direct flight with Southwest Airlines departing from Phoenix Sky Harbor on Mon, Oct 12, arriving in Ontario International.Price includes taxes and charges.From $96, select.

Phoenix.$96 per passenger.Departing Wed, Aug 19, returning Sat, Aug 22.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Ontario International on Wed, Aug 19, arriving in Phoenix Sky Harbor.Inbound direct flight with Southwest Airlines departing from Phoenix Sky Harbor on Sat, Aug 22, arriving in Ontario International.Price includes taxes and charges.From $96, select.

Phoenix.$96 per passenger.Departing Thu, Nov 26, returning Thu, Dec 3.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Ontario International on Thu, Nov 26, arriving in Phoenix Sky Harbor.Inbound direct flight with Southwest Airlines departing from Phoenix Sky Harbor on Thu, Dec 3, arriving in Ontario International.Price includes taxes and charges.From $96, select.

Phoenix.$97 per passenger.Departing Wed, Sep 30, returning Thu, Oct 1.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Ontario International on Wed, Sep 30, arriving in Phoenix Sky Harbor.Inbound direct flight with Southwest Airlines departing from Phoenix Sky Harbor on Thu, Oct 1, arriving in Ontario International.Price includes taxes and charges.From $97, select.

Phoenix.$97 per passenger.Departing Wed, Aug 26, returning Mon, Sep 14.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Ontario International on Wed, Aug 26, arriving in Phoenix Sky Harbor.Inbound direct flight with Southwest Airlines departing from Phoenix Sky Harbor on Mon, Sep 14, arriving in Ontario International.Price includes taxes and charges.From $97, select.

Phoenix.$116 per passenger.Departing Mon, Oct 19, returning Mon, Nov 2.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Ontario International on Mon, Oct 19, arriving in Phoenix Sky Harbor.Inbound direct flight with Southwest Airlines departing from Phoenix Sky Harbor on Mon, Nov 2, arriving in Ontario International.Price includes taxes and charges.From $116, select.

Phoenix.$117 per passenger.Departing Thu, Jan 7, returning Sat, Jan 9.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Ontario International on Thu, Jan 7, arriving in Phoenix Sky Harbor.Inbound direct flight with Southwest Airlines departing from Phoenix Sky Harbor on Sat, Jan 9, arriving in Ontario International.Price includes taxes and charges.From $117, select.

Phoenix.$117 per passenger.Departing Tue, Oct 20, returning Tue, Feb 23.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Ontario International on Tue, Oct 20, arriving in Phoenix Sky Harbor.Inbound direct flight with Southwest Airlines departing from Phoenix Sky Harbor on Tue, Feb 23, arriving in Ontario International.Price includes taxes and charges.From $117, select.

Phoenix.$182 per passenger.Departing Wed, Nov 4, returning Thu, Apr 1.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Ontario International on Wed, Nov 4, arriving in Phoenix Sky Harbor.Inbound direct flight with Southwest Airlines departing from Phoenix Sky Harbor on Thu, Apr 1, arriving in Ontario International.Price includes taxes and charges.From $182, select.

Phoenix.$188 per passenger.Departing Wed, Mar 3, returning Wed, Mar 17.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Ontario International on Wed, Mar 3, arriving in Phoenix Sky Harbor.Inbound direct flight with Southwest Airlines departing from Phoenix Sky Harbor on Wed, Mar 17, arriving in Ontario International.Price includes taxes and charges.From $188, select.

Phoenix.$196 per passenger.Departing Fri, Jan 29, returning Mon, Feb 1.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Ontario International on Fri, Jan 29, arriving in Phoenix Sky Harbor.Inbound direct flight with Southwest Airlines departing from Phoenix Sky Harbor on Mon, Feb 1, arriving in Ontario International.Price includes taxes and charges.From $196, select.

Phoenix.$207 per passenger.Departing Fri, Feb 19, returning Tue, Mar 16.Round-trip flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departing from Ontario International on Fri, Feb 19, arriving in Phoenix Sky Harbor.Inbound direct flight with Southwest Airlines departing from Phoenix Sky Harbor on Tue, Mar 16, arriving in Ontario International.Price includes taxes and charges.From $207, select.

Find the cheapest month to fly from Ontario International to Phoenix

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Ontario International to Phoenix flights are currently cheapest in August.

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Direct flights from Ontario International to Phoenix

Alternative Ontario International to Phoenix routes

Looking for the cheapest, fastest or easiest route from Ontario International to Phoenix? You could fly into the following airports instead.

Ontario to Phoenix: Flight information

The things to know before you go.

Cheapest flight found	$96
Cheapest month to fly	August
Average flight time	1 hr, 20 mins
Most popular airline	Southwest Airlines
Average flights per week	218

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

How many airports are there in Phoenix?

There are 4 airports in Phoenix: Phoenix Sky Harbor, Phoenix Scottsdale Municipal, Phoenix-Deer Valley, and Phoenix-Mesa Gateway.

How much are round-trip flights from Ontario International to Phoenix?

The best price we found for a round-trip flight from Ontario International to Phoenix is $96. 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.

How long does it take to fly from Ontario International to Phoenix?

1 hour and 20 minutes is the average flight time from Ontario International to Phoenix.

Which airlines fly direct from Ontario International to Phoenix?

Southwest Airlines, American Airlines and Envoy Air fly direct from Ontario International to Phoenix.

How many flights are there a week from Ontario International to Phoenix?

There are 218 flights per week flying from Ontario International to Phoenix, as of July 2026.

When is the cheapest time to fly from Ontario International to Phoenix?

The cheapest month to fly from Ontario International to Phoenix is usually August.

What's the cheapest airport to fly to in Phoenix?

If you're flying from Ontario International Airport, the cheapest airport near Phoenix is Phoenix Sky Harbor – which is 6.0 km away from the center of Phoenix. We've found flights to this airport from $96.

Which upcoming date is cheapest to fly from Ontario International Airport to Phoenix on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Ontario International Airport to Phoenix on Wednesday, August 19, 2026.

Can I get a direct flight from Ontario International Airport to Phoenix?

Yes – the average flight time is 1 hour and 20 minutes.

How can I get the best flight deal from Ontario International Airport to Phoenix?

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 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.

When is the best time to book flights to Phoenix?

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.

What’s the weather like in Phoenix?

In July, the average temperature is usually around 33°C. July is typically the warmest month in Phoenix, when it usually averages around 40°C. You can expect the least rain in June. The coldest month is December, with temperatures averaging 4°C. The rainiest month is August.

Which is the cheapest airline to fly with from Ontario International Airport to Phoenix?

Currently, Southwest Airlines offers the cheapest flight tickets to Phoenix.

Traveling from Ontario International Airport (ONT) to Phoenix: what you need to know

Hop on a direct flight from Ontario International Airport to Phoenix and you'll be in the air for around 1 hour 15 minutes.
The timezone in Phoenix is UTC-7. The city is one hour ahead of Ontario, where Ontario International Airport is located.
Ontario International Airport (ONT) to Phoenix Sky Harbor International Airport (PHX) is the most popular route, with 55 weekly departures to pick from. If you have things to do before heading off, the last flight from ONT to PHX is with Southwest Airlines at 20:50. Go for the first departure operated by Southwest Airlines at 05:15 if you want to get on your way earlier.
For a relaxed start to your ONT to Phoenix flight, leave plenty of time for things like baggage drop and finding your gate. Arriving two hours before international departures and an hour before domestic flights is the standard rule.
During popular months like July, it's a good idea to get to the airport even earlier. Plan to arrive two hours before domestic departures and four hours ahead for an international flight whenever you're flying during peak periods in general.
Start your trip at ONT and travel straight to Phoenix Sky Harbor International Airport (PHX). That will be your arrival point when searching for Ontario International Airport to Phoenix tickets.
American Airlines is a popular carrier that offers direct flights from Ontario International Airport to Phoenix.
Located around 5 kilometers from the center of Ontario, ONT can be reached in about 15 minutes by car (depending on traffic). The journey on public transport takes roughly 45 minutes.
Planning to catch an early flight from Ontario International Airport to Phoenix? Avoid the stress of rushing to the airport (and sneak in some extra precious sleep) by choosing one of these stays near ONT:
Ontario International Airport scores high marks for on-time performance. 83% of flights that take off from ONT reach their destination without delay.
The address for ONT is 2900 E. Airport Drive.

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

$48 is currently the lowest price for a one-way Ontario International Airport to Phoenix flight. A return plane ticket starts from $96. These prices may change depending on demand and availability.
Booking early is often the key to scoring a cheap flight from ONT to Phoenix. Prices tend to rise as demand increases, so the nearer your departure date, the more you'll likely spend.
Finding cheap tickets from Ontario International Airport to Phoenix is more likely if you're flexible with your dates. Use the 'Whole month' tool to get the best prices across every month and bag an epic deal.
There's no need to keep looking every day to find out if fares have dropped when you set up a Price Alert. We'll update you the moment there's an updated deal for cheap flights from ONT to Phoenix.
Tailor your trip with filters. Pick your preferred arrival and departure times, total journey duration and airlines. You can also sort the results by 'Best,' 'Cheapest' or 'Fastest' flights from Ontario International Airport to Phoenix.

Airports in Phoenix

Phoenix Sky Harbor International Airport (PHX)

The distance from Phoenix Sky Harbor International Airport (PHX) to central Phoenix is roughly 5 kilometers. It'll take you about 10 minutes to reach the center driving.
If you're using public transport, expect a journey time of about 25 minutes.
If you're arriving on a late flight from Ontario International Airport to Phoenix, few things beat the convenience of staying near the terminal. Grab your bags from the carousel and then be showered and resting soon after at one of these accommodation options near PHX:
For the best deal, reserve your vehicle from Phoenix Sky Harbor International Airport around one week in advance of your flight from ONT to Phoenix.
The street address for PHX is 3400 Sky Harbor Boulevard.

Phoenix-Mesa Gateway Airport (AZA)

Phoenix-Mesa Gateway Airport (AZA) is roughly 32 kilometers from the center of Phoenix. After your flight from Ontario International Airport to Phoenix, it'll take you around 30 minutes to get to the heart of the city in a cab or ride-share.
If you travel by public transport, you'll reach the center in 1 hour 15 minutes or so.
After stepping off your ONT to Phoenix flight, tuck yourself in at a hotel near AZA. These are some great accommodation options that'll help you get into relaxation mode:
Get exactly what you want. Securing your ride from AZA two weeks ahead of time often means more savings and a wider choice of vehicles.
Phoenix-Mesa Gateway Airport can be found at 6033 S. Sossaman Rd..

Best time to go to Phoenix

March is the busiest month for flights from Ontario International Airport to Phoenix. To escape the crowds, visit Phoenix in October.
Lock in a Ontario International Airport to Phoenix plane ticket with a departure in July if you're eager to experience the city during its warmest month. You can expect temperatures to range from 27ºC (81ºF) to 45ºC (113ºF).
Search for cheap tickets from ONT to Phoenix in January if you want to travel in cooler conditions. Temperatures are at their lowest then, ranging between 4ºC (39ºF) and 21ºC (70ºF) on average.

More about Phoenix

Start your Phoenix trip off on the right foot by choosing the ideal place to stay. As soon as you've booked your flight from Ontario International Airport to Phoenix, browse our range of hotels including:
All great vacations should include some sightseeing. Yayoi Kusama Fireflies Infinity Mirror Room, Camelback Mountain and Heard Museum are attractions you won't want to skip in Phoenix.

Explore more of the United States

San Diego is just one of the many cities in the United States waiting to be discovered once you've taken in the sights of Phoenix. Around 483 kilometers away to the west, popular attractions include San Diego Zoo, San Diego Balboa Park and USS Midway Museum.
Las Vegas is another essential stop in the United States and is around 418 kilometers northwest of Phoenix. No trip is complete without a visit to Ciudad del Pecado o Las Vegas, Las Vegas Strip and Fountains of Bellagio.