$117+ Cheap flights from Philadelphia to Ontario (PHL - ONT)
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 8/22. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ONT
Jul 15 — Jul 221
Round-trip
1 adult, Economy
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Find cheap flights from Philadelphia to Ontario with Cheapflights
1. Tell us where you want to go
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Cheapest flights from Philadelphia to OntarioExplore the most affordable flight options available from Philadelphia to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 15, 2026.
Explore the most affordable flight options available from Philadelphia to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 15, 2026.
This Super.com deal was found by Cheapflights users on 6/12. 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.
Wed 7/111:06 am
PHL
- ONT
1 stop11h 45m
Frontier
Sat 7/43:34 pm
ONT
- PHL
1 stop11h 53m
Frontier
Deal found 6/12![Frontier logo]()
$307
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/157:00 am
PHL
- ONT
1 stop8h 30m
Delta
Fri 12/2510:59 pm
ONT
- PHL
1 stop7h 28m
Delta
Deal found 6/10![Delta logo]()
$308
This Frontier deal was found by Cheapflights users on 6/11. 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 6/2711:00 am
PHL
- ONT
1 stop11h 51m
Frontier
Sun 7/58:17 am
ONT
- PHL
1 stop13h 44m
Frontier
Deal found 6/11![Frontier logo]()
$310
This Gotogate deal was found by Cheapflights users on 6/12. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/258:44 pm
PHL
- ONT
1 stop30h 11m
Frontier
Sun 9/273:47 pm
ONT
- PHL
1 stop19h 15m
Frontier
Deal found 6/12![Frontier logo]()
$311
This Priceline deal was found by Cheapflights users on 6/11. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/1611:00 am
PHL
- ONT
1 stop11h 51m
Frontier
Sat 7/43:34 pm
ONT
- PHL
1 stop11h 53m
Frontier
Deal found 6/11![Frontier logo]()
$312
This Frontier deal was found by Cheapflights users on 6/15. 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.
Sun 6/2111:00 am
PHL
- ONT
1 stop11h 51m
Frontier
Thu 7/163:40 pm
ONT
- PHL
1 stop11h 20m
Frontier
Deal found 6/15![Frontier logo]()
$315
This Frontier deal was found by Cheapflights users on 6/12. 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.
Thu 8/611:06 am
PHL
- ONT
1 stop7h 48m
Frontier
Sun 8/94:34 pm
ONT
- PHL
1 stop10h 26m
Frontier
Deal found 6/12![Frontier logo]()
$316
This Frontier deal was found by Cheapflights users on 6/11. 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.
Sun 6/2111:00 am
PHL
- ONT
1 stop11h 51m
Frontier
Mon 7/63:40 pm
ONT
- PHL
1 stop11h 20m
Frontier
Deal found 6/11![Frontier logo]()
$317
This Booking.com deal was found by Cheapflights users on 6/10. 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.
Sun 6/2111:00 am
PHL
- ONT
1 stop11h 51m
Frontier
Mon 7/136:00 am
ONT
- PHL
1 stop20h 39m
Frontier
Deal found 6/10![Frontier logo]()
$318
This Delta deal was found by Cheapflights users on 6/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/76:35 am
PHL
- ONT
1 stop7h 52m
Delta
Sun 11/155:05 pm
ONT
- PHL
1 stop9h 36m
Delta
Deal found 6/11![Delta logo]()
$320
This Priceline deal was found by Cheapflights users on 6/11. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/1311:35 am
PHL
- ONT
1 stop8h 13m
Frontier
Fri 7/36:47 pm
ONT
- PHL
1 stop12h 43m
Frontier
Deal found 6/11![Frontier logo]()
$321
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/146:40 pm
PHL
- ONT
1 stop8h 08m
Delta
Sat 12/195:05 pm
ONT
- PHL
1 stop9h 36m
Delta
Deal found 6/10![Delta logo]()
$323
Best flights from Philadelphia to OntarioDiscover carefully curated flight deals from Philadelphia to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 15, 2026.
Discover carefully curated flight deals from Philadelphia to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 15, 2026.
This Delta deal was found by Cheapflights users on 6/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/67:20 am
PHL
- ONT
1 stop7h 56m
Delta
Thu 9/1012:00 pm
ONT
- PHL
1 stop9h 27m
Delta
Deal found 6/12![Delta logo]()
$359
This United Airlines deal was found by Cheapflights users on 6/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/116:00 am
PHL
- ONT
1 stop9h 12m
United Airlines
Sat 7/184:20 pm
ONT
- PHL
2 stops10h 11m
United Airlines
Deal found 6/13![United Airlines logo]()
$407
This Southwest deal was found by Cheapflights users on 6/10. 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 7/812:55 pm
PHL
- ONT
2 stops9h 05m
Southwest
Wed 7/155:15 am
ONT
- PHL
2 stops9h 45m
Southwest
Deal found 6/10![Southwest logo]()
$412
This Delta deal was found by Cheapflights users on 6/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/125:15 am
PHL
- ONT
1 stop8h 27m
Delta
Thu 8/135:05 pm
ONT
- PHL
1 stop10h 00m
Delta
Deal found 6/12![Delta logo]()
$399
This Southwest deal was found by Cheapflights users on 6/11. 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 7/25:00 am
PHL
- ONT
2 stops9h 20m
Southwest
Tue 7/72:50 pm
ONT
- PHL
1 stop7h 15m
Southwest
Deal found 6/11![Southwest logo]()
$417
This Delta deal was found by Cheapflights users on 6/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/97:30 am
PHL
- ONT
1 stop7h 40m
Delta
Sun 7/1210:00 pm
ONT
- PHL
1 stop8h 31m
Delta
Deal found 6/11![Delta logo]()
$409
This United Airlines deal was found by Cheapflights users on 6/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/2511:03 am
PHL
- ONT
2 stops11h 58m
United Airlines
Sat 8/2911:00 am
ONT
- PHL
2 stops10h 59m
United Airlines
Deal found 6/11![United Airlines logo]()
$467
This United Airlines deal was found by Cheapflights users on 6/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/216:00 am
PHL
- ONT
1 stop9h 12m
United Airlines
Tue 7/281:50 pm
ONT
- PHL
2 stops12h 41m
United Airlines
Deal found 6/12![United Airlines logo]()
$470
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/116:00 am
PHL
- ONT
1 stop7h 38m
Delta
Mon 7/136:01 pm
ONT
- PHL
1 stop8h 28m
Delta
Deal found 6/10![Delta logo]()
$448
This United Airlines deal was found by Cheapflights users on 6/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/16:00 am
PHL
- ONT
1 stop9h 12m
United Airlines
Wed 7/151:50 pm
ONT
- PHL
2 stops12h 41m
United Airlines
Deal found 6/11![United Airlines logo]()
$470
This United Airlines deal was found by Cheapflights users on 6/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/111:38 am
PHL
- ONT
2 stops13h 59m
United Airlines
Tue 7/71:50 pm
ONT
- PHL
2 stops12h 41m
United Airlines
Deal found 6/14![United Airlines logo]()
$482
Last-minute flights from Philadelphia to OntarioDiscover last-minute flight deals from Philadelphia to Ontario. Data last updated June 15, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Ontario. Data last updated June 15, 2026 and is based on user searches.
This Priceline deal was found by Cheapflights users on 6/11. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/1311:35 am
PHL
- ONT
1 stop8h 13m
Frontier
Fri 7/36:47 pm
ONT
- PHL
1 stop12h 43m
Frontier
Deal found 6/11![Frontier logo]()
$321
This Priceline deal was found by Cheapflights users on 6/11. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/1611:00 am
PHL
- ONT
1 stop11h 51m
Frontier
Sat 7/43:34 pm
ONT
- PHL
1 stop11h 53m
Frontier
Deal found 6/11![Frontier logo]()
$312
This Frontier deal was found by Cheapflights users on 6/15. 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.
Sun 6/2111:00 am
PHL
- ONT
1 stop11h 51m
Frontier
Thu 7/163:40 pm
ONT
- PHL
1 stop11h 20m
Frontier
Deal found 6/15![Frontier logo]()
$315
This Frontier deal was found by Cheapflights users on 6/11. 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.
Sun 6/2111:00 am
PHL
- ONT
1 stop11h 51m
Frontier
Mon 7/63:40 pm
ONT
- PHL
1 stop11h 20m
Frontier
Deal found 6/11![Frontier logo]()
$317
This Booking.com deal was found by Cheapflights users on 6/10. 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.
Sun 6/2111:00 am
PHL
- ONT
1 stop11h 51m
Frontier
Mon 7/136:00 am
ONT
- PHL
1 stop20h 39m
Frontier
Deal found 6/10![Frontier logo]()
$318
This Booking.com deal was found by Cheapflights users on 6/14. 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.
Thu 6/258:37 pm
PHL
- ONT
1 stop16h 28m
Frontier
Mon 7/66:00 am
ONT
- PHL
1 stop26h 49m
Frontier
Deal found 6/14![Frontier logo]()
$320
This Frontier deal was found by Cheapflights users on 6/11. 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 6/2711:00 am
PHL
- ONT
1 stop11h 51m
Frontier
Sun 7/58:17 am
ONT
- PHL
1 stop13h 44m
Frontier
Deal found 6/11![Frontier logo]()
$310
This Super.com deal was found by Cheapflights users on 6/12. 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.
Wed 7/111:06 am
PHL
- ONT
1 stop11h 45m
Frontier
Sat 7/43:34 pm
ONT
- PHL
1 stop11h 53m
Frontier
Deal found 6/12![Frontier logo]()
$307
This Booking.com deal was found by Cheapflights users on 6/13. 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.
Fri 7/38:37 pm
PHL
- ONT
1 stop16h 28m
Frontier
Sun 7/126:00 am
ONT
- PHL
1 stop26h 49m
Frontier
Deal found 6/13![Frontier logo]()
$311
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/196:55 pm
PHL
- ONT
1 stop7h 53m
Delta
Thu 8/135:05 pm
ONT
- PHL
1 stop10h 00m
Delta
Deal found 6/10![Delta logo]()
$324
This CheapOair deal was found by Cheapflights users on 6/12. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/198:37 pm
PHL
- ONT
1 stop16h 27m
Frontier
Wed 7/221:38 pm
ONT
- PHL
1 stop13h 22m
Frontier
Deal found 6/12![Frontier logo]()
$328
This Frontier deal was found by Cheapflights users on 6/10. 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.
Thu 7/2312:44 pm
PHL
- ONT
1 stop14h 06m
Frontier
Thu 8/134:34 pm
ONT
- PHL
1 stop10h 26m
Frontier
Deal found 6/10![Frontier logo]()
$331
One-way flights from Philadelphia to OntarioSearch for one-way flight options from Philadelphia to Ontario. Find affordable one-way fares based on user searches. Data last updated June 15, 2026.
Search for one-way flight options from Philadelphia to Ontario. Find affordable one-way fares based on user searches. Data last updated June 15, 2026.
This Super.com deal was found by Cheapflights users on 6/15. 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 8/2211:35 am
PHL
- ONT
1 stop8h 13m
Frontier
Deal found 6/15![Frontier logo]()
$117
This Southwest deal was found by Cheapflights users on 6/11. 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.
Tue 9/156:00 am
PHL
- ONT
1 stop7h 15m
Southwest
Deal found 6/11![Southwest logo]()
$118
This Super.com deal was found by Cheapflights users on 6/14. 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.
Thu 7/3011:06 am
PHL
- ONT
1 stop7h 48m
Frontier
Deal found 6/14![Frontier logo]()
$119
This Frontier deal was found by Cheapflights users on 6/12. 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.
Mon 8/2410:46 am
PHL
- ONT
1 stop7h 23m
Frontier
Deal found 6/12![Frontier logo]()
$121
This CheapOair deal was found by Cheapflights users on 6/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/211:35 am
PHL
- ONT
1 stop8h 13m
Frontier
Deal found 6/10![Frontier logo]()
$122
This Trip.com deal was found by Cheapflights users on 6/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/1412:44 pm
PHL
- ONT
1 stop14h 06m
Frontier
Deal found 6/10![Frontier logo]()
$123
This Super.com deal was found by Cheapflights users on 6/11. 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 8/811:06 am
PHL
- ONT
1 stop23h 57m
Frontier
Deal found 6/11![Frontier logo]()
$124
This Super.com deal was found by Cheapflights users on 6/12. 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 7/268:37 pm
PHL
- ONT
1 stop16h 27m
Frontier
Deal found 6/12![Frontier logo]()
$125
This Super.com deal was found by Cheapflights users on 6/10. 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.
Wed 7/111:06 am
PHL
- ONT
1 stop11h 45m
Frontier
Deal found 6/10![Frontier logo]()
$127
Find flight deals from Philadelphia to Ontario
Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to Ontario (ONT). 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 June 15, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $307 (Super.com) |
One-way from | $117 (Super.com) |
Popular in | March |
Cheapest in | September |
Average price | $485 |
Cheapflights Fare Finder
Customize your flight search to find flights from Philadelphia to Ontario 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 June 15, 2026.
Use the filters below to find and compare flights from Philadelphia to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Sun 9/6
7:20 am-12:16 pm
1 stop7h 56m
Ontario
Thu 9/10
12:00 pm-12:27 am
1 stop9h 27m
$359
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Wed 8/12
5:15 am-10:42 am
1 stop8h 27m
Ontario
Thu 8/13
5:05 pm-6:05 am
1 stop10h 00m
$399
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Sat 7/11
6:00 am-12:12 pm
1 stop9h 12m
Ontario
Sat 7/18
4:20 pm-5:31 am
2 stops10h 11m
$407
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Thu 7/9
7:30 am-12:10 pm
1 stop7h 40m
Ontario
Sun 7/12
10:00 pm-9:31 am
1 stop8h 31m
$409
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Wed 7/8
12:55 pm-7:00 pm
2 stops9h 05m
Ontario
Wed 7/15
5:15 am-6:00 pm
2 stops9h 45m
$412
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Thu 7/2
5:00 am-11:20 am
2 stops9h 20m
Ontario
Tue 7/7
2:50 pm-1:05 am
1 stop7h 15m
$417
Quickest round-trip
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Sat 7/11
6:00 am-10:38 am
1 stop7h 38m
Ontario
Mon 7/13
6:01 pm-5:29 am
1 stop8h 28m
$448
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Tue 8/25
11:03 am-8:01 pm
2 stops11h 58m
Ontario
Sat 8/29
11:00 am-12:59 am
2 stops10h 59m
$467
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Tue 7/21
6:00 am-12:12 pm
1 stop9h 12m
Ontario
Tue 7/28
1:50 pm-5:31 am
2 stops12h 41m
$470
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Wed 7/1
6:00 am-12:12 pm
1 stop9h 12m
Ontario
Wed 7/15
1:50 pm-5:31 am
2 stops12h 41m
$470
Showing 1-10 of 23 resultsSorted by cheapest first
Compare providers for flights from Philadelphia to Ontario
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Philadelphia to Ontario in June.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- Most accurate provider: When it comes to deals on Philadelphia-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Philadelphia-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Philadelphia-Ontario flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Philadelphia-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Philadelphia-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Philadelphia to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Philadelphia with our price prediction graph.
PHL-ONT
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 Philadelphia to Ontario
Prices
Airlines
How far ahead should I book a flight from Philadelphia to Ontario?
The best time to book flights from Philadelphia to Ontario is 59 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 Philadelphia to Ontario?
Currently, September is the cheapest month in which you can book a flight from Philadelphia to Ontario (average of $346). Flying from Philadelphia to Ontario in March is currently the most expensive (average of $492). 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.
How much does it cost to fly round-trip from Philadelphia to Ontario?
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated June 15, 2026.
Read through reviews of airlines operating flights from Philadelphia to Ontario, such as Southwest,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Comfort
8.0
Overall
7.9
Food
7.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Comfort
8.0
Overall
7.9
Food
7.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Comfort
8.0
Overall
7.9
Food
7.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Comfort
8.0
Overall
7.9
Food
7.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Comfort
8.0
Overall
7.9
Food
7.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Comfort
8.0
Overall
7.9
Food
7.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Related info for your journey
Find useful and relevant information for your journey from Philadelphia to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Philadelphia to Ontario
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Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Philadelphia to Ontario by cabin class
Find flights from Philadelphia to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Ontario
Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on June 15, 2026.
Philadelphia and Ontario flights
Browse other Philadelphia and Ontario flight options. Last updated on June 15, 2026.
Other flights from Philadelphia
Browse through other flights departing from Philadelphia. Flights are based on user searches made on Cheapflights and were last updated on June 15, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 5 airlines flying from Philadelphia to Ontario
Discover the top 5 airlines that operate flights from Philadelphia to Ontario. 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 June 15, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$155 | Average$351 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$256 | Average$358 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$290 | Average$486 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$305 | Average$471 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$374 | Average$516 | FlexibilityNo cancel fee | On-time63% |