Route guide · 324 miles
Cheap Flights from Phoenix to Ontario
PHX → ONT · Nonstop 1h 10m · Live round-trip fares
Plenty of travelers price out Phoenix to Ontario every day — here's how to beat the average fare. Nonstops run about 1h 10m, and the calendar matters more than the airline. Aim to book 2–4 weeks ahead, stay flexible on the day of the week, and set a free alert so a price drop never slips past you.
Live fares for PHX → ONT are updating. Use the search below for real-time prices.
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See live fares
Updated daily
Flight time
1h 10m
Nonstop, typical
Distance
324 mi
PHX → ONT
Book ahead
2–4 weeks
Best window, typically
Nonstop airlines
2
American Airlines, Southwest Airlines
Nonstop flights from Phoenix to Ontario
Nonstop flights from Phoenix to Ontario are flown by American Airlines, Southwest Airlines. The 324-mile trip takes about 1h 10m gate to gate, and nonstops are usually cheapest when booked 2–4 weeks ahead.
Booking insights: Phoenix → Ontario
- Distance: 324 miles · nonstop flight time: 1h 10m.
- Cheapest upcoming week in the live data starts around Oct 22, with fares from $180.
- Fares tend to bottom out when you book about 2–4 weeks ahead — earlier than that rarely helps, later usually hurts.
- Midweek departures (Tue–Thu) are consistently cheaper than weekend flights.
- A free fare alert beats daily checking: we watch this route and ping you when prices drop.
Cheapest month · Phoenix → Ontario
October 2026
Every date's recent round-trip fare, at a glance.
Fares from
$180
Cheapest: Fri, Oct 23 — $180
Get this fare →Recent fares found for specific dates in October 2026. Blank days had no recent fare in our data — ask our team and we'll check them for you.
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Flying from Phoenix to Ontario: what you need to know
The flight
At 324 miles, PHX to ONT is one of those quick up-and-down flights: roughly 1h 10m nonstop. There's no meal service to plan around — the decisions that matter here are departure time and which airport entrance traffic is kinder to you.
Airlines on this route
American Airlines and Southwest Airlines fly this route nonstop. That matters more than it sounds: the cheapest fare on one carrier is rarely the same product as the cheapest on another. Checked-bag fees, free seat selection and change rules all differ, so compare the full trip cost before you pick a winner. See our airline guides for exactly what each carrier charges — then send an enquiry and we'll confirm the all-in price for your dates.
Leaving from Phoenix (PHX)
Plan to be at the airport two hours before a domestic departure — ninety minutes can work at smaller airports outside peak times, but security lines are the one variable you can't control. If you're checking a bag, add time rather than cutting it close. Our Phoenix airport guide covers terminals, parking and ground transport so you can plan the trip to the airport, not just the flight.
Arriving in Ontario (ONT)
Before you land, know how you're getting from the airport to where you're staying — it's the part of the trip people forget to plan. The Ontario airport guide lays out your ground options, from transit and shuttles to rideshares and rental cars. Flying back the other way? Check Ontario to Phoenix fares — prices on the return direction often move on a different rhythm.
When to book
For a trip of 324 miles, booking 2–4 weeks ahead typically lands you in the sweet spot. Leave it to the final two weeks and prices usually climb as the cheapest seats sell out. If your dates are flexible, midweek departures are where the lower fares hide on most domestic routes.
Good to know before you go
- Morning flights are delayed less often than evening ones — earlier departures have the best on-time record.
- Basic economy fares often exclude checked bags and seat selection. Price the whole trip, not the headline fare.
- Get to the airport two hours before departure; security, not the flight, is the part that runs late.
- If you're traveling with only a carry-on, you can skip the bag-drop line entirely with mobile check-in.
- Download the airline's app before you fly; gate changes and delays show up there first.
Phoenix to Ontario flight FAQs
How long is the flight from PHX to ONT?
Nonstop flights from Phoenix to Ontario take about 1h 10m and cover roughly 324 miles. One-stop itineraries add 2–4 hours depending on the layover city.
Are there nonstop flights from Phoenix to Ontario?
American Airlines, Southwest Airlines typically operate nonstop flights from PHX to ONT. Nonstops are usually cheapest when booked 2–4 weeks ahead of departure.
What is the cheapest month to fly from Phoenix to Ontario?
There's no single magic month, but prices on this route generally soften in the shoulder season, when demand dips after the holidays and again in early fall. A free fare alert is the easiest way to catch those windows.
How much are last minute flights from PHX to ONT?
Last-minute flights from PHX to ONT (booked within 7 days of departure) typically cost noticeably more than fares booked 2–4 weeks out. Booking early is the smarter move.
What is a good round-trip deal from Phoenix to Ontario?
A good deal is anything at or below the recent fares shown above. Set a free Airfare Deal alert and we'll ping you the moment fares drop.
Which airlines fly from Phoenix to Ontario?
You'll mainly see American Airlines, Southwest Airlines on Phoenix to Ontario. Checking each against the live fares below is the surest way to find the lowest price for your dates.
How early should I get to Phoenix airport for this flight?
Plan on two hours before departure for a domestic flight — ninety minutes can work at smaller airports outside peak times. If you're checking a bag, earlier is better; the bag-drop line, not the flight, is what runs late.
Do the cheapest fares on this route include a checked bag?
Usually not. Basic economy fares on most airlines include a carry-on but charge extra for checked bags, and seat selection can cost more too. Add up the real total before comparing — a slightly higher regular fare sometimes works out cheaper. Our team confirms the full breakdown with you before you pay.
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