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Cheap flights from Ontario to Phoenix from $59

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Phoenix departing on 4/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to Phoenix

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
6:15 am - 5:46 pm
ONT
-
PHX
11h 31m
1 stop
Frontier Logo
4:27 pm - 9:03 pm
PHX
-
ONT
4h 36m
1 stop
$141Frontier
Sun, Mar 8 - Wed, Mar 11
Frontier Logo
2:06 pm - 6:54 pm
ONT
-
PHX
3h 48m
1 stop
Frontier Logo
7:15 am - 4:15 pm
PHX
-
ONT
9h 00m
1 stop
$143Frontier
Wed, Mar 4 - Wed, Mar 11
Frontier Logo
2:06 pm - 6:54 pm
ONT
-
PHX
3h 48m
1 stop
Frontier Logo
12:17 pm - 9:34 pm
PHX
-
ONT
10h 17m
1 stop
$144Frontier
Sat, Feb 21 - Wed, Feb 25
Frontier Logo
10:35 pm - 9:48 am
ONT
-
PHX
11h 13m
1 stop
Frontier Logo
8:02 pm - 1:40 pm
PHX
-
ONT
17h 38m
1 stop
$145Frontier
Sun, Apr 12 - Tue, Apr 14
Frontier Logo
2:06 pm - 1:55 pm
ONT
-
PHX
22h 49m
1 stop
Frontier Logo
5:57 pm - 9:03 pm
PHX
-
ONT
27h 06m
2 stops
$147Frontier
Tue, Mar 3 - Tue, Mar 10
Frontier Logo
3:24 pm - 10:43 pm
ONT
-
PHX
6h 19m
1 stop
Frontier Logo
3:24 pm - 5:48 pm
PHX
-
ONT
3h 24m
1 stop
$148Frontier
Thu, Feb 26 - Mon, Mar 2
Frontier Logo
2:06 pm - 6:54 pm
ONT
-
PHX
3h 48m
1 stop
Frontier Logo
8:04 pm - 1:52 pm
PHX
-
ONT
18h 48m
1 stop
$150Frontier
Wed, Feb 18 - Tue, Feb 24
Frontier Logo
6:43 pm - 1:55 pm
ONT
-
PHX
18h 12m
1 stop
Frontier Logo
9:35 pm - 1:11 pm
PHX
-
ONT
16h 36m
1 stop
$151Frontier
Mon, Feb 23 - Fri, Feb 27
Frontier Logo
2:06 pm - 8:42 am
ONT
-
PHX
17h 36m
2 stops
Frontier Logo
12:17 pm - 9:34 pm
PHX
-
ONT
10h 17m
1 stop
$152Frontier
Tue, Mar 3 - Wed, Mar 4
Multiple Airlines Logo
3:28 pm - 8:34 pm
ONT
-
PHX
4h 06m
1 stop
Multiple Airlines Logo
7:57 pm - 1:28 pm
PHX
-
ONT
17h 31m
2 stops
$153Multiple Airlines
Mon, Mar 2 - Mon, Mar 9

Frontier flights from Ontario to Phoenix Sky Harbor Intl Airport

Our best Frontier deals on Ontario to Phoenix Sky Harbor Intl Airport flight tickets
Frontier
Mar 8
ONT6:15 amOntario
11h 31m
1 stop
PHX5:46 pmPhoenix Sky Harbor Intl
Mar 11
PHX4:27 pmPhoenix Sky Harbor Intl
4h 36m
1 stop
ONT9:03 pmOntario
$141
Frontier
Mar 4
ONT2:06 pmOntario
3h 48m
1 stop
PHX6:54 pmPhoenix Sky Harbor Intl
Mar 11
PHX7:15 amPhoenix Sky Harbor Intl
9h 00m
1 stop
ONT4:15 pmOntario
$143
Frontier
Feb 21
ONT2:06 pmOntario
3h 48m
1 stop
PHX6:54 pmPhoenix Sky Harbor Intl
Feb 25
PHX3:05 pmPhoenix Sky Harbor Intl
4h 17m
1 stop
ONT6:22 pmOntario
$144

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Phoenix Sky Harbor Intl Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated February 5, 2026.
Use the filters below to find and compare flights from Ontario to Phoenix Sky Harbor Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sun 3/8

6:15 am-5:46 pm

1 stop11h 31m

Phoenix Sky Harbor Intl

Wed 3/11

4:27 pm-9:03 pm

1 stop4h 36m

$141

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 3/4

2:06 pm-6:54 pm

1 stop3h 48m

Phoenix Sky Harbor Intl

Wed 3/11

7:15 am-4:15 pm

1 stop9h 00m

$143

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sat 2/21

2:06 pm-6:54 pm

1 stop3h 48m

Phoenix Sky Harbor Intl

Wed 2/25

12:17 pm-9:34 pm

1 stop10h 17m

$144

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sun 4/12

10:35 pm-9:48 am

1 stop11h 13m

Phoenix Sky Harbor Intl

Tue 4/14

8:02 pm-1:40 pm

1 stop17h 38m

$145

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 3/3

2:06 pm-1:55 pm

1 stop22h 49m

Phoenix Sky Harbor Intl

Tue 3/10

5:57 pm-9:03 pm

2 stops27h 06m

$147

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Thu 2/26

3:24 pm-10:43 pm

1 stop6h 19m

Phoenix Sky Harbor Intl

Mon 3/2

3:24 pm-5:48 pm

1 stop3h 24m

$148

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 2/18

2:06 pm-6:54 pm

1 stop3h 48m

Phoenix Sky Harbor Intl

Tue 2/24

8:04 pm-1:52 pm

1 stop18h 48m

$150

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Mon 2/23

6:43 pm-1:55 pm

1 stop18h 12m

Phoenix Sky Harbor Intl

Fri 2/27

9:35 pm-1:11 pm

1 stop16h 36m

$151

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 3/3

2:06 pm-8:42 am

2 stops17h 36m

Phoenix Sky Harbor Intl

Wed 3/4

12:17 pm-9:34 pm

1 stop10h 17m

$152

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Mon 3/2

3:28 pm-8:34 pm

1 stop4h 06m

Phoenix Sky Harbor Intl

Mon 3/9

7:57 pm-1:28 pm

2 stops17h 31m

$153

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Phoenix from

How to get the cheapest flight ticket from Ontario to Phoenix Sky Harbor Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Phoenix Sky Harbor Intl Airport?

In general, September is the cheapest month to fly from Ontario to Phoenix Sky Harbor Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $151. If you are unable to visit Phoenix Sky Harbor Intl Airport during the month of September, then departing from Ontario during the month August is also very affordable. Most momondo users find prices during this month for around $187.

What is the cheapest day to depart on your flight to Phoenix Sky Harbor Intl Airport?

On average, the least expensive day to fly to Phoenix Sky Harbor Intl Airport from Ontario is on a Friday. momondo users have found tickets for Friday departures for as low as $206. However, this price may fluctuate depending on the airline, the season, and holidays. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $299. These prices are subject to change though, so be sure to set up a Price Alert for flights to Phoenix Sky Harbor Intl Airport.

What is the cheapest time of day to depart on your flight to Phoenix Sky Harbor Intl Airport?

At noon is the cheapest time of day to fly from Ontario to Phoenix Sky Harbor Intl Airport when you can find flight prices for as low as $183. Flying to Phoenix Sky Harbor Intl Airport at noon is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the morning because they tend to be around $269. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Ontario to Phoenix Sky Harbor Intl flight route?

Fly from Ontario to Phoenix Sky Harbor Intl for the best Ontario - Phoenix Sky Harbor Intl flight prices

How far in advance should I book a flight to Phoenix Sky Harbor Intl Airport?

You are more likely to see cheaper flights to Phoenix Sky Harbor Intl Airport from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Phoenix Sky Harbor Intl Airport for around $249 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Phoenix Sky Harbor Intl Airport from Ontario for as low as $134 on momondo.

What cabin class options are available on Ontario to Phoenix Sky Harbor Intl flights?

There are 4 cabin classes available to choose from on Ontario to Phoenix Sky Harbor Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Ontario to Phoenix Sky Harbor Intl Airport flights?

No. A direct flight is the cheapest option for a flight between Ontario to Phoenix Sky Harbor Intl Airport.

How have Ontario to Phoenix Sky Harbor Intl Airport flight prices changed over time?

As of February 2026, prices for Ontario to Phoenix Sky Harbor Intl Airport flights are approximately 205% more expensive when compared to flights at the same time last year.

When to book flights from Ontario to Phoenix Sky Harbor Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Phoenix Sky Harbor Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Phoenix Sky Harbor Intl Airport (ONT to PHX) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Phoenix Sky Harbor Intl Airport

Best Price Found

$184

Fastest flight time

1h 15m

Direct flights

Every day
The best one-way flight to Phoenix Sky Harbor Intl Airport from Ontario in the past 72 hours is $184. The best round-trip flight deal from Ontario to Phoenix Sky Harbor Intl Airport found on momondo in the last 72 hours is $309.
The fastest flight from Ontario to Phoenix Sky Harbor Intl Airport takes 1h 15m
Direct flights go from Ontario to Phoenix Sky Harbor Intl Airport every day.
Search flight deals

  • How far is Ontario to Phoenix Sky Harbor Intl by plane?

    The straight-line distance from Ontario to Phoenix Sky Harbor Intl is 327.4 mi. A reasonable flight in good conditions will take 1h 15m.

  • When did momondo last update prices for flights from Ontario Airport to Phoenix Sky Harbor Intl Airport?

    Prices for flights from Ontario Airport to Phoenix Sky Harbor Intl Airport are updated daily.

  • How many operators does momondo search for flights from Ontario Airport to Phoenix Sky Harbor Intl Airport?

  • How old do you have to be to fly from Ontario Airport to Phoenix Sky Harbor Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Phoenix Sky Harbor Intl Airport.

  • What documentation or ID do you need to fly to Phoenix Sky Harbor Intl Airport?

    The travel and health documents you'll need for your trip to Phoenix Sky Harbor Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Phoenix Sky Harbor Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Ontario to Phoenix Sky Harbor Intl Airport?

  • What is the most popular airline from Ontario to Phoenix Sky Harbor Intl Airport?

Best airlines flying from Ontario to Phoenix Sky Harbor Intl Airport

Compare and see reviews for airlines that fly from Ontario to Phoenix Sky Harbor Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $49Free CancellationRating
5.7
3,052 reviews
Search Frontier flights
SouthwestPriceFrom $97Free CancellationRating
8.0
4,274 reviews
Search Southwest flights
American AirlinesPriceFrom $122Free CancellationRating
7.2
11,222 reviews
Search American Airlines flights

  • Southwest Flights From Ontario to Phoenix Sky Harbor Intl Airport

    Southwest operates around 16 flights from Ontario to Phoenix Sky Harbor Intl Airport every week. The average price of these flights found in the last 72 hours has been $257, but momondo users have found Southwest deals from Ontario to Phoenix Sky Harbor Intl Airport from as low as $97 round-trip. Southwest has been scored 8.0/10 in 4,274 reviews.

  • American Airlines Flights From Ontario to Phoenix Sky Harbor Intl Airport

    American Airlines (7.2/10 from 11,222 reviews) operates around 19 flights from Ontario to Phoenix Sky Harbor Intl Airport in any given week. The average American Airlines airfare for this route is around $299, with deals from around $122 rare but found on momondo. Referenced prices are for round-trip Ontario to Phoenix Sky Harbor Intl Airport flight searches in the last 72 hours.

Traveling to a place near Phoenix?

Book flights to Phoenix if you plan to visit one of these locations
Scottsdale
Mesa
Tempe
Chandler
Glendale
Gilbert
Peoria
Casa Grande
Surprise
Goodyear
Buckeye
Payson
Apache Junction
Paradise Valley
Avondale
Wickenburg
Camp Verde
Guadalupe
Litchfield Park
Fountain Hills

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Phoenix?

It is quick and easy to find Ontario to Phoenix flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Phoenix that suits you.

Can I find flights from Ontario to Phoenix with flexible booking policies on momondo?

All flight searches from Ontario to Phoenix on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Ontario to Phoenix?

momondo provides multiple filters to help you find the best flight to Phoenix from Ontario. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Ontario to Phoenix right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Phoenix from Ontario. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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