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Cheap flights from Ontario to Phoenix from $39

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 9/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Ontario to Phoenix

Cheap round-trip flights

Southwest Logo
6:40 am - 7:55 amONT-PHX
1h 15mnonstop
Southwest Logo
4:05 pm - 5:20 pmPHX-ONT
1h 15mnonstop
$77Southwest
Find Deal
Wed, Oct 22 - Thu, Oct 23
Southwest Logo
5:15 pm - 9:55 pmONT-PHX
4h 40m1 stop
Southwest Logo
4:05 pm - 5:20 pmPHX-ONT
1h 15mnonstop
$87Southwest
Find Deal
Wed, Oct 22 - Thu, Oct 23
American Airlines Logo
4:45 pm - 6:12 pmONT-PHX
1h 27mnonstop
American Airlines Logo
2:43 pm - 4:05 pmPHX-ONT
1h 22mnonstop
$91American Airlines
Find Deal
Thu, Sep 18 - Mon, Sep 22
Southwest Logo
8:50 am - 10:05 amONT-PHX
1h 15mnonstop
Southwest Logo
5:25 pm - 11:40 pmPHX-ONT
6h 15m2 stops
$92Southwest
Find Deal
Wed, Oct 22 - Thu, Oct 23
American Airlines Logo
6:10 am - 7:27 amONT-PHX
1h 17mnonstop
American Airlines Logo
2:43 pm - 4:05 pmPHX-ONT
1h 22mnonstop
$117American Airlines
Find Deal
Thu, Sep 25 - Thu, Sep 25
American Airlines Logo
6:10 am - 7:27 amONT-PHX
1h 17mnonstop
American Airlines Logo
2:43 pm - 4:05 pmPHX-ONT
1h 22mnonstop
$118American Airlines
Find Deal
Wed, Sep 10 - Mon, Sep 15
American Airlines Logo
6:10 am - 7:27 amONT-PHX
1h 17mnonstop
American Airlines Logo
8:04 am - 9:21 amPHX-ONT
1h 17mnonstop
$121American Airlines
Find Deal
Fri, Sep 26 - Sat, Sep 27
Frontier Logo
12:59 am - 7:32 amONT-PHX
6h 33m1 stop
Frontier Logo
10:31 am - 2:00 pmPHX-ONT
3h 29m1 stop
$142Frontier
Find Deal
Wed, Sep 3 - Mon, Sep 8
Frontier Logo
7:30 pm - 10:42 pmONT-PHX
3h 12m1 stop
Frontier Logo
4:10 pm - 11:38 pmPHX-ONT
7h 28m1 stop
$143Frontier
Find Deal
Thu, Sep 25 - Mon, Oct 6
Frontier Logo
8:59 pm - 7:32 amONT-PHX
10h 33m1 stop
Frontier Logo
4:10 pm - 11:38 pmPHX-ONT
7h 28m1 stop
$147Frontier
Find Deal
Wed, Sep 10 - Mon, Sep 15

American Airlines flights from Ontario to Phoenix

Our best American Airlines deals on Ontario to Phoenix flight tickets
American Airlines
Sep 18
ONT4:45 pmOntario
1h 27m
PHX6:12 pmPhoenix Sky Harbor Intl
Sep 22
PHX2:43 pmPhoenix Sky Harbor Intl
1h 22m
ONT4:05 pmOntario
$91
Find similar
American Airlines
Sep 25
ONT6:10 amOntario
1h 17m
PHX7:27 amPhoenix Sky Harbor Intl
Sep 25
PHX2:43 pmPhoenix Sky Harbor Intl
1h 22m
ONT4:05 pmOntario
$117
Find similar
American Airlines
Sep 10
ONT6:10 amOntario
1h 17m
PHX7:27 amPhoenix Sky Harbor Intl
Sep 15
PHX2:43 pmPhoenix Sky Harbor Intl
1h 22m
ONT4:05 pmOntario
$118
Find similar

Frontier flights from Ontario to Phoenix

Our best Frontier deals on Ontario to Phoenix flight tickets
Frontier
Sep 3
ONT12:59 amOntario
6h 33m
1 stop
PHX7:32 amPhoenix Sky Harbor Intl
Sep 8
PHX10:31 amPhoenix Sky Harbor Intl
3h 29m
1 stop
ONT2:00 pmOntario
$142
Find similar
Frontier
Sep 25
ONT7:30 pmOntario
3h 12m
1 stop
PHX10:42 pmPhoenix Sky Harbor Intl
Oct 6
PHX4:10 pmPhoenix Sky Harbor Intl
7h 28m
1 stop
ONT11:38 pmOntario
$143
Find similar
Frontier
Sep 10
ONT8:59 pmOntario
10h 33m
1 stop
PHX7:32 amPhoenix Sky Harbor Intl
Sep 15
PHX4:10 pmPhoenix Sky Harbor Intl
7h 28m
1 stop
ONT11:38 pmOntario
$147
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 August 16, 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

Wed 10/22

6:40 am-7:55 am

Nonstop1h 15m

Phoenix Sky Harbor Intl

Thu 10/23

4:05 pm-5:20 pm

Nonstop1h 15m

$77

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 10/22

5:15 pm-9:55 pm

1 stop4h 40m

Phoenix Sky Harbor Intl

Thu 10/23

4:05 pm-5:20 pm

Nonstop1h 15m

$87

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Thu 9/18

4:45 pm-6:12 pm

Nonstop1h 27m

Phoenix Sky Harbor Intl

Mon 9/22

2:43 pm-4:05 pm

Nonstop1h 22m

$91

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 10/22

8:50 am-10:05 am

Nonstop1h 15m

Phoenix Sky Harbor Intl

Thu 10/23

5:25 pm-11:40 pm

2 stops6h 15m

$92

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Thu 9/25

6:10 am-7:27 am

Nonstop1h 17m

Phoenix Sky Harbor Intl

Thu 9/25

2:43 pm-4:05 pm

Nonstop1h 22m

$117

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 9/10

6:10 am-7:27 am

Nonstop1h 17m

Phoenix Sky Harbor Intl

Mon 9/15

2:43 pm-4:05 pm

Nonstop1h 22m

$118

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Fri 9/26

6:10 am-7:27 am

Nonstop1h 17m

Phoenix Sky Harbor Intl

Sat 9/27

8:04 am-9:21 am

Nonstop1h 17m

$121

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 9/3

12:59 am-7:32 am

1 stop6h 33m

Phoenix Sky Harbor Intl

Mon 9/8

10:31 am-2:00 pm

1 stop3h 29m

$142

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Thu 9/25

7:30 pm-10:42 pm

1 stop3h 12m

Phoenix Sky Harbor Intl

Mon 10/6

4:10 pm-11:38 pm

1 stop7h 28m

$143

OntarioPhoenix

ONT - PHX

ONTPHX

Ontario

Wed 9/10

8:59 pm-7:32 am

1 stop10h 33m

Phoenix Sky Harbor Intl

Mon 9/15

4:10 pm-11:38 pm

1 stop7h 28m

$147

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 August, then departing from Ontario during the month September is also very affordable. Most momondo users find prices during this month for around $216.

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 Saturday. momondo users have found tickets for Saturday departures for as low as $194. 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 $155. In the morning is when there is more demand to fly to Phoenix, so prices are often more expensive at around $285 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 $164 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

Best Price Found

$39

Fastest flight time

1h 10m

Direct flights

Every day

Airports in Phoenix

1 airport
The best one-way flight to Phoenix from Ontario in the past 72 hours is $39. The best round-trip flight deal from Ontario to Phoenix found on momondo in the last 72 hours is $77.
The fastest flight from Ontario to Phoenix takes 1h 10m
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 10m.

  • 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 $45Free CancellationRating
5.8
3,211 reviews
Search Frontier flights
SouthwestPriceFrom $110Free CancellationRating
8.0
4,246 reviews
Search Southwest flights
American AirlinesPriceFrom $133Free CancellationRating
7.2
10,000 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