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Cheap flights from Ontario to Phoenix from $57

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 5/20. 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.
American Airlines Logo
1:10 pm - 2:34 pm
ONT
-
PHX
1h 24mnonstop
American Airlines Logo
8:43 pm - 9:57 pm
PHX
-
ONT
1h 14mnonstop
$137American Airlines
Tue, Jun 2 - Wed, Jun 3
Frontier Logo
6:00 am - 3:23 pm
ONT
-
PHX
9h 23m
1 stop
Frontier Logo
10:27 pm - 8:04 am
PHX
-
ONT
9h 37m
1 stop
$140Frontier
Tue, May 19 - Sat, May 23
Frontier Logo
1:39 pm - 11:42 pm
ONT
-
PHX
10h 03m
2 stops
Frontier Logo
10:27 pm - 3:09 pm
PHX
-
ONT
16h 42m
1 stop
$142Frontier
Tue, Jun 2 - Wed, Jun 3
Southwest Logo
10:30 am - 11:45 am
ONT
-
PHX
1h 15mnonstop
Southwest Logo
8:30 am - 11:35 am
PHX
-
ONT
3h 05m
1 stop
$143Southwest
Wed, May 27 - Wed, Jun 3
Frontier Logo
3:30 pm - 11:24 pm
ONT
-
PHX
7h 54m
1 stop
Frontier Logo
7:40 am - 3:09 pm
PHX
-
ONT
7h 29m
1 stop
$147Frontier
Sat, May 30 - Mon, Jun 1
Frontier Logo
6:00 am - 5:59 pm
ONT
-
PHX
11h 59m
2 stops
Frontier Logo
10:27 pm - 8:04 am
PHX
-
ONT
9h 37m
1 stop
$148Frontier
Tue, May 19 - Wed, May 20
Frontier Logo
3:30 pm - 1:20 pm
ONT
-
PHX
21h 50m
2 stops
Frontier Logo
10:27 pm - 8:04 am
PHX
-
ONT
9h 37m
1 stop
$149Frontier
Mon, May 25 - Thu, May 28
Frontier Logo
3:30 pm - 1:20 pm
ONT
-
PHX
21h 50m
2 stops
Frontier Logo
7:40 am - 3:09 pm
PHX
-
ONT
7h 29m
1 stop
$150Frontier
Mon, May 25 - Thu, Jun 4
Frontier Logo
8:17 pm - 11:42 pm
ONT
-
PHX
27h 25m
2 stops
Frontier Logo
10:27 pm - 3:08 pm
PHX
-
ONT
16h 41m
1 stop
$151Frontier
Tue, Jun 2 - Mon, Jun 8
Frontier Logo
6:00 am - 3:23 pm
ONT
-
PHX
9h 23m
1 stop
Frontier Logo
10:27 pm - 3:44 pm
PHX
-
ONT
17h 17m
1 stop
$152Frontier
Tue, May 19 - Tue, May 19

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American Airlines flights from Ontario to Phoenix

Our best American Airlines deals on Ontario to Phoenix flight tickets
American Airlines
Jun 2
ONT1:10 pmOntario
1h 24m
PHX2:34 pmPhoenix Sky Harbor Intl
Jun 3
PHX8:43 pmPhoenix Sky Harbor Intl
1h 14m
ONT9:57 pmOntario
$137
American Airlines
Jun 1
ONT7:12 pmOntario
1h 23m
PHX8:35 pmPhoenix Sky Harbor Intl
Jun 2
PHX8:43 pmPhoenix Sky Harbor Intl
1h 14m
ONT9:57 pmOntario
$157
American Airlines
Jun 6
ONT1:11 pmOntario
1h 23m
PHX2:34 pmPhoenix Sky Harbor Intl
Jun 8
PHX8:43 pmPhoenix Sky Harbor Intl
1h 14m
ONT9:57 pmOntario
$177

Frontier flights from Ontario to Phoenix

Our best Frontier deals on Ontario to Phoenix flight tickets
Frontier
May 19
ONT6:00 amOntario
9h 23m
1 stop
PHX3:23 pmPhoenix Sky Harbor Intl
May 23
PHX10:27 pmPhoenix Sky Harbor Intl
9h 37m
1 stop
ONT8:04 amOntario
$140
Frontier
Jun 2
ONT1:39 pmOntario
10h 03m
2 stops
PHX11:42 pmPhoenix Sky Harbor Intl
Jun 3
PHX10:27 pmPhoenix Sky Harbor Intl
16h 42m
1 stop
ONT3:09 pmOntario
$142
Frontier
May 30
ONT3:30 pmOntario
7h 54m
1 stop
PHX11:24 pmPhoenix Sky Harbor Intl
Jun 1
PHX7:40 amPhoenix Sky Harbor Intl
7h 29m
1 stop
ONT3:09 pmOntario
$147

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 May 3, 2026.
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

Cheapest round-trip
Quickest round-trip

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 6/2

1:10 pm-2:34 pm

Nonstop1h 24m

Phoenix Sky Harbor Intl

Wed 6/3

8:43 pm-9:57 pm

Nonstop1h 14m

$137

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 5/19

6:00 am-3:23 pm

1 stop9h 23m

Phoenix Sky Harbor Intl

Sat 5/23

10:27 pm-8:04 am

1 stop9h 37m

$140

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 6/2

1:39 pm-11:42 pm

2 stops10h 03m

Phoenix Sky Harbor Intl

Wed 6/3

10:27 pm-3:09 pm

1 stop16h 42m

$142

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 5/27

10:30 am-11:45 am

Nonstop1h 15m

Phoenix Sky Harbor Intl

Wed 6/3

8:30 am-11:35 am

1 stop3h 05m

$143

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Sat 5/30

3:30 pm-11:24 pm

1 stop7h 54m

Phoenix Sky Harbor Intl

Mon 6/1

7:40 am-3:09 pm

1 stop7h 29m

$147

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 5/19

6:00 am-5:59 pm

2 stops11h 59m

Phoenix Sky Harbor Intl

Wed 5/20

10:27 pm-8:04 am

1 stop9h 37m

$148

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Mon 5/25

3:30 pm-1:20 pm

2 stops21h 50m

Phoenix Sky Harbor Intl

Thu 5/28

10:27 pm-8:04 am

1 stop9h 37m

$149

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Mon 5/25

3:30 pm-1:20 pm

2 stops21h 50m

Phoenix Sky Harbor Intl

Thu 6/4

7:40 am-3:09 pm

1 stop7h 29m

$150

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 6/2

8:17 pm-11:42 pm

2 stops27h 25m

Phoenix Sky Harbor Intl

Mon 6/8

10:27 pm-3:08 pm

1 stop16h 41m

$151

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Tue 5/19

6:00 am-3:23 pm

1 stop9h 23m

Phoenix Sky Harbor Intl

Tue 5/19

10:27 pm-3:44 pm

1 stop17h 17m

$152

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 typical price of a round-trip flight between Ontario and Phoenix?

What is the cheapest month to fly to Phoenix?

If you are unable to visit Phoenix during the month of January, then departing from Ontario during the month November is also very affordable. Most momondo users find prices during this month for around $49.

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 $221. 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 $321.

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 $185. In the afternoon is when there is more demand to fly to Phoenix, so prices are often more expensive at around $296 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 from Ontario 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 $260 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.

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

3 airports
The fastest flight from Ontario to Phoenix takes 1h 15m
Direct flights go from Ontario to Phoenix every day.
There are 3 airports in Phoenix. From Ontario there are direct flights to Phoenix Sky Harbor Intl (PHX).
Search flight deals

Frequently asked questions about flying from Ontario to Phoenix

  • 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 $79Free CancellationRating
5.6
2,970 reviews
Search Frontier flights
SouthwestPriceFrom $112Free CancellationRating
8.0
4,312 reviews
Search Southwest flights
American AirlinesPriceFrom $124Free CancellationRating
7.1
11,672 reviews
Search American Airlines flights
JetBluePriceFrom $228Free CancellationRating
7.1
2,966 reviews
Search JetBlue 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