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Cheap flights from Ontario to Phoenix from $47

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 12/10. 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 - 9:26 pm
ONT
-
PHX
14h 11m1 stop
Frontier Logo
7:43 pm - 9:17 pm
PHX
-
ONT
26h 34m1 stop
$92Frontier
Mon, Dec 15 - Tue, Dec 16
Frontier Logo
6:15 am - 9:26 pm
ONT
-
PHX
14h 11m1 stop
Frontier Logo
7:43 pm - 9:17 pm
PHX
-
ONT
26h 34m1 stop
$93Frontier
Mon, Dec 15 - Tue, Dec 16
Frontier Logo
7:15 am - 3:15 pm
ONT
-
PHX
7h 00m1 stop
Frontier Logo
8:30 am - 3:07 pm
PHX
-
ONT
7h 37m1 stop
$108Frontier
Wed, Jan 14 - Wed, Jan 28
Frontier Logo
7:15 am - 3:15 pm
ONT
-
PHX
7h 00m1 stop
Frontier Logo
8:30 am - 3:07 pm
PHX
-
ONT
7h 37m1 stop
$109Frontier
Wed, Jan 14 - Wed, Jan 28
Frontier Logo
7:15 am - 7:19 pm
ONT
-
PHX
11h 04m1 stop
Frontier Logo
4:52 pm - 7:53 pm
PHX
-
ONT
4h 01m1 stop
$110Frontier
Tue, Feb 3 - Thu, Feb 5
Frontier Logo
6:15 am - 9:26 pm
ONT
-
PHX
14h 11m1 stop
Frontier Logo
10:05 am - 9:17 pm
PHX
-
ONT
12h 12m2 stops
$115Frontier
Mon, Dec 15 - Tue, Dec 16
Frontier Logo
8:05 pm - 10:22 am
ONT
-
PHX
13h 17m1 stop
Frontier Logo
10:36 pm - 11:24 pm
PHX
-
ONT
25h 48m1 stop
$116Frontier
Mon, Feb 2 - Fri, Feb 6
Frontier Logo
7:56 pm - 11:36 am
ONT
-
PHX
14h 40m1 stop
Frontier Logo
8:30 am - 3:07 pm
PHX
-
ONT
7h 37m1 stop
$119Frontier
Sun, Jan 18 - Wed, Jan 21
Frontier Logo
8:30 am - 2:33 pm
ONT
-
PHX
5h 03m1 stop
Frontier Logo
6:54 pm - 9:17 pm
PHX
-
ONT
3h 23m1 stop
$127Frontier
Sat, Feb 28 - Sun, Mar 1
Frontier Logo
11:27 am - 11:40 pm
ONT
-
PHX
11h 13m1 stop
Frontier Logo
11:32 am - 6:40 pm
PHX
-
ONT
8h 08m1 stop
$128Frontier
Thu, Feb 5 - Sat, Feb 7

Frontier flights from Ontario to Phoenix

Our best Frontier deals on Ontario to Phoenix flight tickets
Frontier
Dec 15
ONT6:15 amOntario
14h 11m
1 stop
PHX9:26 pmPhoenix Sky Harbor Intl
Dec 16
PHX7:43 pmPhoenix Sky Harbor Intl
26h 34m
1 stop
ONT9:17 pmOntario
$92
Find similar
Frontier
Dec 15
ONT6:15 amOntario
14h 11m
1 stop
PHX9:26 pmPhoenix Sky Harbor Intl
Dec 16
PHX7:43 pmPhoenix Sky Harbor Intl
26h 34m
1 stop
ONT9:17 pmOntario
$93
Find similar
Frontier
Jan 14
ONT7:15 amOntario
7h 00m
1 stop
PHX3:15 pmPhoenix Sky Harbor Intl
Jan 28
PHX8:30 amPhoenix Sky Harbor Intl
7h 37m
1 stop
ONT3:07 pmOntario
$108
Find similar

American Airlines flights from Ontario to Phoenix

Our best American Airlines deals on Ontario to Phoenix flight tickets
American Airlines
Jan 14
ONT4:45 pmOntario
1h 21m
PHX7:06 pmPhoenix Sky Harbor Intl
Jan 28
PHX11:42 amPhoenix Sky Harbor Intl
1h 21m
ONT12:03 pmOntario
$131
Find similar
American Airlines
Jan 7
ONT12:57 pmOntario
1h 21m
PHX3:18 pmPhoenix Sky Harbor Intl
Jan 8
PHX3:48 pmPhoenix Sky Harbor Intl
1h 17m
ONT4:05 pmOntario
$151
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Phoenix 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 December 4, 2025.
Use the filters below to find and compare flights from Ontario to Phoenix that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Mon 12/15

6:15 am-9:26 pm

1 stop14h 11m

Phoenix Sky Harbor Intl

Tue 12/16

7:43 pm-9:17 pm

1 stop26h 34m

$92

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Mon 12/15

6:15 am-9:26 pm

1 stop14h 11m

Phoenix Sky Harbor Intl

Tue 12/16

7:43 pm-9:17 pm

1 stop26h 34m

$93

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 1/14

7:15 am-3:15 pm

1 stop7h 00m

Phoenix Sky Harbor Intl

Wed 1/28

8:30 am-3:07 pm

1 stop7h 37m

$108

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 1/14

7:15 am-3:15 pm

1 stop7h 00m

Phoenix Sky Harbor Intl

Wed 1/28

8:30 am-3:07 pm

1 stop7h 37m

$109

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 2/3

7:15 am-7:19 pm

1 stop11h 04m

Phoenix Sky Harbor Intl

Thu 2/5

4:52 pm-7:53 pm

1 stop4h 01m

$110

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Mon 12/15

6:15 am-9:26 pm

1 stop14h 11m

Phoenix Sky Harbor Intl

Tue 12/16

10:05 am-9:17 pm

2 stops12h 12m

$115

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Mon 2/2

8:05 pm-10:22 am

1 stop13h 17m

Phoenix Sky Harbor Intl

Fri 2/6

10:36 pm-11:24 pm

1 stop25h 48m

$116

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sun 1/18

7:56 pm-11:36 am

1 stop14h 40m

Phoenix Sky Harbor Intl

Wed 1/21

8:30 am-3:07 pm

1 stop7h 37m

$119

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sat 2/28

8:30 am-2:33 pm

1 stop5h 03m

Phoenix Sky Harbor Intl

Sun 3/1

6:54 pm-9:17 pm

1 stop3h 23m

$127

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Thu 2/5

11:27 am-11:40 pm

1 stop11h 13m

Phoenix Sky Harbor Intl

Sat 2/7

11:32 am-6:40 pm

1 stop8h 08m

$128

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

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?

If you are unable to visit Phoenix 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 $185.

What is the cheapest day to depart on your flight to Phoenix?

On average, the least expensive day to fly to Phoenix from Ontario is on a Friday. momondo users have found tickets for Friday departures for as low as $199. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Ontario because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $293.

What is the cheapest time of day to depart on your flight to Phoenix?

The cheapest time of day to fly to Phoenix is at noon when flights can be purchased for as low as $183. In the morning is when there is more demand to fly to Phoenix, so prices are often more expensive at around $266 per ticket.

What is the cheapest Ontario to Phoenix flight route?

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

How far in advance should I book a flight to Phoenix?

You are more likely to see cheaper flights to Phoenix from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Phoenix for around $252 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Phoenix from Ontario for as low as $171 on momondo.

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

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

Cheap Ontario to Phoenix flight deals and tips

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

Fastest flight time

1h 15m

Direct flights

Every day

Airports in Phoenix

1 airport
The fastest flight from Ontario to Phoenix takes 1h 15m
Direct flights go from Ontario to Phoenix every day.
There is 1 airport near Phoenix: Phoenix Sky Harbor Intl (PHX)
Search flight deals

  • How far is Ontario to Phoenix by plane?

    The straight-line distance from Ontario to Phoenix is 322.9 mi. By plane, this route typically takes 1h 15m.

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

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

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

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

    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.

  • What documentation or ID do you need to fly to Phoenix?

    The travel and health documents you'll need for your trip to Phoenix 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. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Ontario to Phoenix

Compare and see reviews for airlines that fly from Ontario to Phoenix with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $64Free CancellationRating
5.8
3,092 reviews
Search Frontier flights
SouthwestPriceFrom $97Free CancellationRating
8.0
4,252 reviews
Search Southwest flights
American AirlinesPriceFrom $122Free CancellationRating
7.2
11,043 reviews
Search American Airlines flights

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?

Flights from Ontario to Phoenix with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once all potential Ontario to Phoenix flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of Ontario to Phoenix flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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Find better results for your trip to the United States

Fly into one of these airports located in Phoenix

Airports listed have a maximum distance of 25.4 mi from Phoenix
Phoenix-Mesa Gateway Airport