$57+ Cheap flights from Ontario (ONT) to Phoenix
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PHX
Jun 2 — Jun 91
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Ontario to Phoenix with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Ontario to Phoenix are usually found in September or August, booked 73 days in advance, depart on a Wednesday or Thursday and return on a Tuesday
Cheap flight deals from Ontario to Phoenix
Cheapest
Best
Last-minute
One-way
Cheapest flights from Ontario to PhoenixExplore the most affordable flight options available from Ontario to Phoenix. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 3, 2026.
Explore the most affordable flight options available from Ontario to Phoenix. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 3, 2026.
This American Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/21:10 pm
ONT
- PHX
Nonstop1h 24m
American Airlines
Wed 6/38:43 pm
PHX
- ONT
Nonstop1h 14m
American Airlines
Deal found 4/30![American Airlines logo]()
$137
This Kiwi.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/21:39 pm
ONT
- PHX
2 stops10h 03m
Frontier
Wed 6/310:27 pm
PHX
- ONT
1 stop16h 42m
Frontier
Deal found 4/30![Frontier logo]()
$142
This Southwest deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2710:30 am
ONT
- PHX
Nonstop1h 15m
Southwest
Wed 6/38:30 am
PHX
- ONT
1 stop3h 05m
Southwest
Deal found 4/29![Southwest logo]()
$143
This Kiwi.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/303:30 pm
ONT
- PHX
1 stop7h 54m
Frontier
Mon 6/17:40 am
PHX
- ONT
1 stop7h 29m
Frontier
Deal found 4/30![Frontier logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/196:00 am
ONT
- PHX
2 stops11h 59m
Frontier
Wed 5/2010:27 pm
PHX
- ONT
1 stop9h 37m
Frontier
Deal found 4/29![Frontier logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/253:30 pm
ONT
- PHX
2 stops21h 50m
Frontier
Thu 5/2810:27 pm
PHX
- ONT
1 stop9h 37m
Frontier
Deal found 4/28![Frontier logo]()
$149
This Kiwi.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/253:30 pm
ONT
- PHX
2 stops21h 50m
Frontier
Thu 6/47:40 am
PHX
- ONT
1 stop7h 29m
Frontier
Deal found 4/30![Frontier logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/28:17 pm
ONT
- PHX
2 stops27h 25m
Frontier
Mon 6/810:27 pm
PHX
- ONT
1 stop16h 41m
Frontier
Deal found 5/1![Frontier logo]()
$151
This Booking.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/196:00 am
ONT
- PHX
1 stop9h 23m
Frontier
Tue 5/1910:27 pm
PHX
- ONT
1 stop17h 17m
Frontier
Deal found 4/28![Frontier logo]()
$152
This Kiwi.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/274:39 pm
ONT
- PHX
1 stop6h 45m
Frontier
Fri 5/299:05 am
PHX
- ONT
2 stops22h 59m
Frontier
Deal found 4/29![Frontier logo]()
$153
This American Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/17:12 pm
ONT
- PHX
Nonstop1h 23m
American Airlines
Tue 6/28:43 pm
PHX
- ONT
Nonstop1h 14m
American Airlines
Deal found 4/30![American Airlines logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/188:06 pm
ONT
- PHX
1 stop17h 03m
Frontier
Tue 5/2610:27 pm
PHX
- ONT
1 stop9h 37m
Frontier
Deal found 4/28![Frontier logo]()
$158
Best flights from Ontario to PhoenixDiscover carefully curated flight deals from Ontario to Phoenix that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 3, 2026.
Discover carefully curated flight deals from Ontario to Phoenix that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 3, 2026.
This Southwest deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/218:10 am
ONT
- PHX
Nonstop1h 15m
Southwest
Mon 5/254:40 pm
PHX
- ONT
1 stop6h 00m
Southwest
Deal found 4/30![Southwest logo]()
$284
This KAYAK deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/151:11 pm
ONT
- PHX
Nonstop1h 23m
American Airlines
Tue 6/168:43 pm
PHX
- ONT
Nonstop1h 14m
American Airlines
Deal found 4/29![American Airlines logo]()
$361
This Southwest deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/183:55 pm
ONT
- PHX
2 stops5h 20m
Southwest
Thu 5/217:30 am
PHX
- ONT
Nonstop1h 15m
Southwest
Deal found 4/29![Southwest logo]()
$310
This Southwest deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/296:00 pm
ONT
- PHX
Nonstop1h 15m
Southwest
Sun 5/317:25 am
PHX
- ONT
1 stop4h 05m
Southwest
Deal found 5/2![Southwest logo]()
$345
This Southwest deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/115:15 am
ONT
- PHX
Nonstop1h 15m
Southwest
Sun 6/145:45 am
PHX
- ONT
1 stop5h 35m
Southwest
Deal found 5/2![Southwest logo]()
$349
This Southwest deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/79:40 am
ONT
- PHX
1 stop6h 00m
Southwest
Fri 6/1210:55 pm
PHX
- ONT
Nonstop1h 10m
Southwest
Deal found 5/1![Southwest logo]()
$349
This Southwest deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/139:20 am
ONT
- PHX
2 stops8h 10m
Southwest
Tue 6/164:35 pm
PHX
- ONT
2 stops5h 30m
Southwest
Deal found 5/1![Southwest logo]()
$349
This Southwest deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/293:55 pm
ONT
- PHX
2 stops5h 20m
Southwest
Fri 6/53:50 pm
PHX
- ONT
2 stops6h 45m
Southwest
Deal found 4/29![Southwest logo]()
$349
This Southwest deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/223:55 pm
ONT
- PHX
2 stops5h 20m
Southwest
Sun 5/241:20 pm
PHX
- ONT
2 stops6h 05m
Southwest
Deal found 4/29![Southwest logo]()
$365
This Southwest deal was found by Cheapflights users on 5/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/13:55 pm
ONT
- PHX
2 stops5h 20m
Southwest
Thu 6/411:40 am
PHX
- ONT
2 stops5h 55m
Southwest
Deal found 5/2![Southwest logo]()
$369
Last-minute flights from Ontario to PhoenixDiscover last-minute flight deals from Ontario to Phoenix. Data last updated May 3, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Phoenix. Data last updated May 3, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/169:15 am
ONT
- PHX
1 stop9h 20m
Frontier
Sat 5/2310:27 pm
PHX
- ONT
1 stop9h 37m
Frontier
Deal found 4/29![Frontier logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/188:06 pm
ONT
- PHX
1 stop17h 03m
Frontier
Tue 5/2610:27 pm
PHX
- ONT
1 stop9h 37m
Frontier
Deal found 4/28![Frontier logo]()
$158
This Kiwi.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/196:00 am
ONT
- PHX
2 stops11h 59m
Frontier
Wed 5/2010:27 pm
PHX
- ONT
1 stop9h 37m
Frontier
Deal found 4/29![Frontier logo]()
$148
This Booking.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/196:00 am
ONT
- PHX
1 stop9h 23m
Frontier
Tue 5/1910:27 pm
PHX
- ONT
1 stop17h 17m
Frontier
Deal found 4/28![Frontier logo]()
$152
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/253:30 pm
ONT
- PHX
2 stops21h 50m
Frontier
Thu 5/2810:27 pm
PHX
- ONT
1 stop9h 37m
Frontier
Deal found 4/28![Frontier logo]()
$149
This Kiwi.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/253:30 pm
ONT
- PHX
2 stops21h 50m
Frontier
Thu 6/47:40 am
PHX
- ONT
1 stop7h 29m
Frontier
Deal found 4/30![Frontier logo]()
$150
This American Airlines deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/267:12 pm
ONT
- PHX
Nonstop1h 23m
American Airlines
Thu 5/2810:45 am
PHX
- ONT
Nonstop1h 20m
American Airlines
Deal found 4/30![American Airlines logo]()
$157
This American Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/276:10 am
ONT
- PHX
Nonstop1h 25m
American Airlines
Wed 6/310:45 am
PHX
- ONT
Nonstop1h 20m
American Airlines
Deal found 4/29![American Airlines logo]()
$137
This Kiwi.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/271:39 pm
ONT
- PHX
2 stops10h 03m
Frontier
Wed 6/37:40 am
PHX
- ONT
1 stop8h 04m
Frontier
Deal found 4/29![Frontier logo]()
$142
This Southwest deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2710:30 am
ONT
- PHX
Nonstop1h 15m
Southwest
Wed 6/38:30 am
PHX
- ONT
1 stop3h 05m
Southwest
Deal found 4/29![Southwest logo]()
$143
This Kiwi.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/274:39 pm
ONT
- PHX
1 stop6h 45m
Frontier
Fri 5/299:05 am
PHX
- ONT
2 stops22h 59m
Frontier
Deal found 4/29![Frontier logo]()
$153
This Kiwi.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/303:30 pm
ONT
- PHX
1 stop7h 54m
Frontier
Mon 6/17:40 am
PHX
- ONT
1 stop7h 29m
Frontier
Deal found 4/30![Frontier logo]()
$147
One-way flights from Ontario to PhoenixSearch for one-way flight options from Ontario to Phoenix. Find affordable one-way fares based on user searches. Data last updated May 3, 2026.
Search for one-way flight options from Ontario to Phoenix. Find affordable one-way fares based on user searches. Data last updated May 3, 2026.
This WAYA deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/204:39 pm
ONT
- PHX
1 stop6h 45m
Frontier
Deal found 4/28![Frontier logo]()
$57
This Kiwi.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/93:34 pm
ONT
- PHX
1 stop7h 26m
Frontier
Deal found 5/1![Frontier logo]()
$58
This Kiwi.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/264:39 pm
ONT
- PHX
1 stop6h 45m
Frontier
Deal found 4/30![Frontier logo]()
$59
This Kiwi.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/213:30 pm
ONT
- PHX
1 stop7h 54m
Frontier
Deal found 4/28![Frontier logo]()
$65
This Kiwi.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/303:30 pm
ONT
- PHX
1 stop7h 54m
Frontier
Deal found 5/1![Frontier logo]()
$66
This Kiwi.com deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2811:51 am
ONT
- PHX
1 stop11h 33m
Frontier
Deal found 4/30![Frontier logo]()
$67
This American Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/209:24 am
ONT
- PHX
Nonstop1h 21m
American Airlines
Deal found 4/29![American Airlines logo]()
$69
This American Airlines deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/267:12 pm
ONT
- PHX
Nonstop1h 23m
American Airlines
Deal found 5/3![American Airlines logo]()
$70
This Super.com deal was found by Cheapflights users on 5/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/248:59 am
ONT
- PHX
1 stop11h 58m
Frontier
Deal found 5/3![Frontier logo]()
$75
This Super.com deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/1610:50 am
ONT
- PHX
1 stop5h 05m
Frontier
Deal found 4/29![Frontier logo]()
$89
Find flight deals from Ontario to Phoenix
Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Phoenix (PH1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 3, 2026.
Round-trip from | $137 (American Airlines) |
|---|---|
One-way from | $57 (WAYA) |
Popular in | February |
Cheapest in | September |
Average price | $259 |
Cheapflights 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, Cheapflights users made 2,558,603 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
Cheapest round-trip
OntarioPhoenix
ONT - PHX
ONTPHX
Ontario
Thu 5/21
8:10 am-9:25 am
Nonstop1h 15m
Phoenix Sky Harbor Intl
Mon 5/25
4:40 pm-10:40 pm
1 stop6h 00m
$284
OntarioPhoenix
ONT - PHX
ONTPHX
Ontario
Mon 5/18
3:55 pm-9:15 pm
2 stops5h 20m
Phoenix Sky Harbor Intl
Thu 5/21
7:30 am-8:45 am
Nonstop1h 15m
$310
OntarioPhoenix
ONT - PHX
ONTPHX
Ontario
Fri 5/29
6:00 pm-7:15 pm
Nonstop1h 15m
Phoenix Sky Harbor Intl
Sun 5/31
7:25 am-11:30 am
1 stop4h 05m
$345
OntarioPhoenix
ONT - PHX
ONTPHX
Ontario
Thu 6/11
5:15 am-6:30 am
Nonstop1h 15m
Phoenix Sky Harbor Intl
Sun 6/14
5:45 am-11:20 am
1 stop5h 35m
$349
OntarioPhoenix
ONT - PHX
ONTPHX
Ontario
Sun 6/7
9:40 am-3:40 pm
1 stop6h 00m
Phoenix Sky Harbor Intl
Fri 6/12
10:55 pm-12:05 am
Nonstop1h 10m
$349
OntarioPhoenix
ONT - PHX
ONTPHX
Ontario
Sat 6/13
9:20 am-5:30 pm
2 stops8h 10m
Phoenix Sky Harbor Intl
Tue 6/16
4:35 pm-10:05 pm
2 stops5h 30m
$349
OntarioPhoenix
ONT - PHX
ONTPHX
Ontario
Fri 5/29
3:55 pm-9:15 pm
2 stops5h 20m
Phoenix Sky Harbor Intl
Fri 6/5
3:50 pm-10:35 pm
2 stops6h 45m
$349
Quickest round-trip
OntarioPhoenix
ONT - PHX
ONTPHX
Ontario
Mon 6/15
1:11 pm-2:34 pm
Nonstop1h 23m
Phoenix Sky Harbor Intl
Tue 6/16
8:43 pm-9:57 pm
Nonstop1h 14m
$361
OntarioPhoenix
ONT - PHX
ONTPHX
Ontario
Fri 5/22
3:55 pm-9:15 pm
2 stops5h 20m
Phoenix Sky Harbor Intl
Sun 5/24
1:20 pm-7:25 pm
2 stops6h 05m
$365
OntarioPhoenix
ONT - PHX
ONTPHX
Ontario
Mon 6/1
3:55 pm-9:15 pm
2 stops5h 20m
Phoenix Sky Harbor Intl
Thu 6/4
11:40 am-5:35 pm
2 stops5h 55m
$369
Showing 1-10 of 22 resultsSorted by cheapest first
Best time to book a flight from Ontario to Phoenix
Have a flexible travel schedule? Discover the best time to fly to Phoenix from Ontario with our price prediction graph.
ONT-PH1
ONT-PHX
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Ontario to Phoenix
ONT-PH1
ONT-PHX
How far ahead should I book a flight from Ontario to Phoenix?
The best time to book flights from Ontario to Phoenix is 71 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Ontario to Phoenix?
Currently, January is the cheapest month in which you can book a flight from Ontario to Phoenix (average of $29). Flying from Ontario to Phoenix in December is currently the most expensive (average of $149). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from ONT to PHX?
Find hourly flight availability from Ontario to Phoenix. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 3, 2026.
It’s optimal to fly from Ontario to Phoenix at noon. By choosing this option you can save up to 16% on the cost of your flight, compared to a flight in the evening.
What is the cheapest day to fly from Ontario to Phoenix?
Use this chart to determine the cheapest time to fly round-trip from Ontario to Phoenix. Price data was last updated on April 25, 2026.
Travelers seeking maximum savings on their Ontario to Phoenix flight should consider departing on Saturday at noon when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Ontario to Phoenix
Explore weekly flight availability from Ontario to Phoenix. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated May 3, 2026.
The most flights from ONT to PH1 are scheduled on a Monday (11 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (6 on average).
How much does it cost to fly round-trip from Ontario to Phoenix?
Reviews of airlines servicing Phoenix
Get insights into the airlines that provide service to Phoenix. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Phoenix. Reviews last updated May 3, 2026.
Read reviews from past customers who have flown Southwest,American Airlines, andJetBlue from Ontario to Phoenix. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Comfort
8.0
Overall
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Related info for your journey
Find useful and relevant information for your journey from Ontario to Phoenix. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from Ontario
Popular flights
Alternative routes for Ontario to Phoenix
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Phoenix by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Phoenix by cabin class
Find flights from Ontario to Phoenix, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and Phoenix flights
Browse other Ontario and Phoenix flight options. Last updated on May 3, 2026.
Other flights from Ontario
Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on May 3, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 4 airlines flying from Ontario to Phoenix
Discover the top 4 airlines that operate flights from Ontario to Phoenix. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$79 | Average$166 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$112 | Average$265 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$124 | Average$304 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$228 | Average$308 | FlexibilityNo cancel fee | On-time62% |