Skyscanner home

Cheap Flights from Phoenix to Ontario International

Compare Phoenix to Ontario International flight deals

Find the cheapest month or even day of the year to fly to Ontario International

Book the best Ontario International fare with no extra fees

Flight deals from Phoenix to Ontario International

Looking for a cheap last-minute deal or the best return flight from Phoenix to Ontario International Airport? If you want to travel next month, return fares start from R 1,906. Find the lowest prices on one-way and return tickets right here.
Ontario.R 879 per passenger.Departing Wed, 23 Sep.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Phoenix Sky Harbor on Wed, 23 Sep, arriving in Ontario International.Price includes taxes and charges.From R 879, select.
Ontario.R 879 per passenger.Departing Tue, 20 Oct.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Phoenix Sky Harbor on Tue, 20 Oct, arriving in Ontario International.Price includes taxes and charges.From R 879, select.
Ontario.R 880 per passenger.Departing Wed, 18 Nov.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Phoenix Sky Harbor on Wed, 18 Nov, arriving in Ontario International.Price includes taxes and charges.From R 880, select.
Ontario.R 954 per passenger.Departing Sat, 5 Dec.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Phoenix Sky Harbor on Sat, 5 Dec, arriving in Ontario International.Price includes taxes and charges.From R 954, select.
Ontario.R 955 per passenger.Departing Sat, 22 Aug.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Phoenix Sky Harbor on Sat, 22 Aug, arriving in Ontario International.Price includes taxes and charges.From R 955, select.
Ontario.R 962 per passenger.Departing Sat, 25 Jul.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Phoenix Sky Harbor on Sat, 25 Jul, arriving in Ontario International.Price includes taxes and charges.From R 962, select.
Ontario.R 1,595 per passenger.Departing Tue, 9 Feb.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Phoenix Sky Harbor on Tue, 9 Feb, arriving in Ontario International.Price includes taxes and charges.From R 1,595, select.
Ontario.R 1,608 per passenger.Departing Wed, 6 Jan.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Phoenix Sky Harbor on Wed, 6 Jan, arriving in Ontario International.Price includes taxes and charges.From R 1,608, select.
Ontario.R 1,609 per passenger.Departing Tue, 9 Mar.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Phoenix Sky Harbor on Tue, 9 Mar, arriving in Ontario International.Price includes taxes and charges.From R 1,609, select.
Ontario.R 2,359 per passenger.Departing Tue, 30 Jun.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Phoenix Sky Harbor on Tue, 30 Jun, arriving in Ontario International.Price includes taxes and charges.From R 2,359, select.
Ontario.R 3,599 per passenger.Departing Tue, 30 Jun.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Phoenix Sky Harbor on Tue, 30 Jun, arriving in Ontario International.Price includes taxes and charges.From R 3,599, select.
Ontario.R 5,549 per passenger.Departing Fri, 16 Apr.One-way flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departs from Phoenix Sky Harbor on Fri, 16 Apr, arriving in Ontario International.Price includes taxes and charges.From R 5,549, select.
Ontario.R 5,549 per passenger.Departing Fri, 7 May.One-way flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departs from Phoenix Sky Harbor on Fri, 7 May, arriving in Ontario International.Price includes taxes and charges.From R 5,549, select.

Find the cheapest month to fly from Phoenix to Ontario International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Phoenix to Ontario International flights are currently cheapest in September.
Jun
from R 2,359
Jul
from R 962
Aug
from R 955
Sep
from R 879
Oct
from R 879
Nov
from R 880
Dec
from R 954
Jan
from R 1,608
Feb
from R 1,595
Mar
from R 1,609
Apr
from R 5,549
May
from R 5,549

Direct flights from Phoenix to Ontario International

Phoenix to Ontario International: Alternative routes

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

Ontario International

4km from central Ontario
Closest
from R 879
Search flights

San Bernardino Norton AFB

39km from central Ontario
from R 2,487
Search flights

Santa Ana John Wayne

48km from central Ontario
from R 461
Search flights

Long Beach Municipal

54km from central Ontario
from R 953
Search flights

Hawthorne

65km from central Ontario
Search flights

Burbank

67km from central Ontario
from R 843
Search flights

Los Angeles International

71km from central Ontario
Cheapest
from R 405
Search flights

Phoenix to Ontario: Flight information

The things to know before you go.
Cheapest flight foundR 879
Cheapest month to flySeptember
Average flight time1 hr, 17 mins
Most popular airlineSouthwest Airlines
Average flights per week94

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

The best price we found for a return flight from Phoenix to Ontario International is R 1,757. 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 17 minutes is the average flight time from Phoenix to Ontario International.
Southwest Airlines, American Airlines and Porter Airlines fly direct from Phoenix to Ontario International.
As of June 2026, there are 94 flights per week flying from Phoenix to Ontario International.
The cheapest month to fly from Phoenix to Ontario International is usually August.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Phoenix to Ontario International Airport on Tuesday, 25 August 2026.
Yes – the average flight time is 1 hour and 17 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 Ontario International 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 Ontario is around 40 days in advance, so don’t leave your flight to the last minute.

The cheapest airline that flies to Ontario International is Southwest Airlines .

Flying from Phoenix to Ontario International Airport (ONT): What you need to know

  • Phoenix's main airport is Phoenix Sky Harbour International Airport (PHX). Check out your departure options from this base when booking flights from Phoenix to Ontario International Airport (ONT).

  • 1 hour 15 minutes is the average journey time for a direct Phoenix to Ontario International Airport flight.

  • Ontario International Airport is located in Ontario. The city runs on the UTC-8 timezone and is one hour behind Phoenix.

  • Phoenix Sky Harbour International Airport (PHX) to Ontario International Airport (ONT) is the most popular route. There are 55 direct weekly departures to choose from. If you prefer starting your day later, take the last flight with Southwest Airlines at 10:50pm. Choose the first PHX to ONT departure operated by Southwest Airlines at 6:40am if you're aiming for an earlier start.

  • Your flight from Phoenix to ONT won't wait if you're running late, so be at the airport on time. Arrive up to one hour in advance for domestic flights and two hours ahead for international travel.

  • Going away during a peak month like March? High seasons (like Christmas and New Year) can add another hour at security. Be extra cautious and arrive up to four hours ahead of international flights and two hours before domestic departures.

Airports in Phoenix

Phoenix Sky Harbour International Airport (PHX)

  • You can book a direct flight from Phoenix to Ontario International Airport (ONT) out of Phoenix Sky Harbour International Airport (PHX).

  • When taking off from PHX, you can take a direct flight from Phoenix to Ontario International Airport with American Airlines.

  • The top choice among passengers flying between PHX and ONT is American Airlines.

  • American Airlines is the most punctual carrier on this route.

  • PHX is about 5 kilometres from central Phoenix. If you're driving, ride-sharing or catching a taxi from the centre, it'll take you 10 minutes or so to get there, depending on the traffic. If you're planning to take public transport, expect the journey time to be around 25 minutes.

  • Want a leisurely start to your journey? Stay near Phoenix Sky Harbour International Airport. Whether you're catching an early flight from Phoenix to Ontario International Airport or just don't want to be rushed, these hotels are just the thing:

  • 80% of flights departing from Phoenix Sky Harbour International Airport arrive at their destination according to schedule. Given its strong performance rating, delays are unlikely when jetting out of PHX.

  • PHX's address is 3400 Sky Harbour Boulevard.

Phoenix-Mesa Gateway Airport (AZA)

  • You can get to AZA from central Phoenix in approximately 30 minutes by car (depending on traffic conditions). The journey on public transport takes roughly 1 hour 15 minutes to travel the 32 kilometres or so.

  • Want to treat yourself to an extra night away before catching your Phoenix to ONT flight? Unwind in a hotel near Phoenix-Mesa Gateway Airport before your holiday officially starts. These stays are calling your name:

  • Most flights that leave Phoenix-Mesa Gateway Airport reach their destination as expected. It achieves a consistent on-time performance rate of 82%.

  • AZA is located at 6033 S. Sossaman Rd..

About Ontario International Airport (ONT)

  • If you're arriving on a late flight from Phoenix to Ontario International Airport, nothing beats the convenience of staying near the terminal. Collect your bags from the carousel and then be showered and sleeping soon after at one of these hotels near ONT:

  • Get the best deal by booking your vehicle around three weeks before your Phoenix to Ontario International Airport flight.

  • The address for ONT is 2900 E. Airport Drive.

Getting from Ontario International Airport (ONT) to central Ontario

  • Central Ontario is around 10 kilometres from Ontario International Airport and takes about 15 minutes to reach by car. See what your options are for getting into town, whether that's with a car hire, taxi or ride-share.

  • It takes around 45 minutes to get there using public transport.

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

  • R 879 is currently the best price for a one-way ticket from Phoenix to Ontario International Airport. Return flights start from R 1,757. These fares may change based on demand and availability.

  • To pick up cheap flights from Phoenix to ONT, book early. Airlines typically offer their most competitively priced fares when tickets are first released.

  • If you have some flexibility with your travel dates, try using the 'Whole month' tool. It'll give you the lowest price in each month when searching for your Phoenix to Ontario International Airport ticket.

  • Save time looking for cheap plane tickets from Phoenix to ONT by setting up a Price Alert. We'll send you an email or notification on the app when prices go down.

  • Hunt down a great price on a flight from Phoenix to Ontario International Airport with the help of the filters. Choose your ideal departure and arrival times, airlines and number of stops. You can also sort your results by 'Cheapest,' 'Fastest' or 'Best.'

The best time to fly from Phoenix to Ontario International Airport (ONT)

  • Picture the kind of break you want when picking your flight dates. December is the quietest month to go to Ontario. July is when most people book flights from Phoenix to Ontario International Airport (ONT), which may be perfect if you're chasing more excitement.

  • When booking your Phoenix to ONT plane ticket, consider the type of weather you enjoy. August is the warmest month in Ontario, with temperatures ranging from 16ºC (61ºF) to 36ºC (97ºF).

  • If you'd rather travel in cooler conditions, look for a cheap ticket from Phoenix to Ontario International Airport in February when temperatures are between 4ºC (39ºF) and 24ºC (75ºF).

More about Ontario

Explore more of the United States

  • San Diego is just one of the many places in the United States waiting to be discovered once you've seen Ontario. Around 153 kilometres away to the south, its top attractions include San Diego Zoo, San Diego Balboa Park and USS Midway Museum.

  • If there's time to check out another major stop in the United States, consider Bakersfield, about 193 kilometres northwest of Ontario. Kern County Museum, Rabobank Arena, Theatre & Convention Centre and Bakersfield Museum of Art are highlights.

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.