$66+ 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 5/27. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ONT
May 22 — May 291
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
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
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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 April 22, 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 April 22, 2026.
This Frontier deal was found by Cheapflights users on 4/17. 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 5/238:35 pm
PHL
- ONT
1 stop16h 30m
Frontier
Sat 5/306:00 am
ONT
- PHL
1 stop20h 37m
Frontier
Deal found 4/17![Frontier logo]()
$226
This Frontier deal was found by Cheapflights users on 4/21. 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.
Fri 6/1911:06 am
PHL
- ONT
1 stop11h 45m
Frontier
Wed 6/243:34 pm
ONT
- PHL
1 stop11h 53m
Frontier
Deal found 4/21![Frontier logo]()
$290
This Booking.com deal was found by Cheapflights users on 4/21. 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.
Mon 5/48:41 pm
PHL
- ONT
1 stop16h 24m
Frontier
Mon 5/116:00 am
ONT
- PHL
1 stop20h 37m
Frontier
Deal found 4/21![Frontier logo]()
$294
This Trip.com deal was found by Cheapflights users on 4/20. 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.
Thu 4/306:43 am
PHL
- ONT
1 stop16h 42m
Frontier
Wed 5/1310:50 am
ONT
- PHL
1 stop15h 47m
Frontier
Deal found 4/20![Frontier logo]()
$296
This CheapOair deal was found by Cheapflights users on 4/21. 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.
Wed 5/1312:17 pm
PHL
- ONT
1 stop9h 54m
Frontier
Sun 5/176:00 am
ONT
- PHL
1 stop20h 37m
Frontier
Deal found 4/21![Frontier logo]()
$297
This Frontier deal was found by Cheapflights users on 4/21. 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.
Fri 4/243:22 pm
PHL
- ONT
1 stop11h 36m
Frontier
Thu 5/283:30 pm
ONT
- PHL
1 stop11h 51m
Frontier
Deal found 4/21![Frontier logo]()
$300
This CheapOair deal was found by Cheapflights users on 4/21. 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 5/178:35 pm
PHL
- ONT
1 stop16h 30m
Frontier
Wed 5/2010:50 am
ONT
- PHL
1 stop15h 47m
Frontier
Deal found 4/21![Frontier logo]()
$301
This American Airlines deal was found by Cheapflights users on 4/17. 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 5/1911:50 am
PHL
- ONT
2 stops9h 34m
American Airlines
Sat 5/2312:41 pm
ONT
- PHL
1 stop8h 55m
American Airlines
Deal found 4/17![American Airlines logo]()
$303
This Booking.com deal was found by Cheapflights users on 4/19. 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 5/128:35 pm
PHL
- ONT
1 stop30h 14m
Frontier
Fri 8/215:43 pm
ONT
- PHL
1 stop18h 24m
Frontier
Deal found 4/19![Frontier logo]()
$304
This Frontier deal was found by Cheapflights users on 4/20. 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.
Fri 4/243:22 pm
PHL
- ONT
1 stop11h 36m
Frontier
Sun 4/265:12 pm
ONT
- PHL
1 stop9h 22m
Frontier
Deal found 4/20![Frontier logo]()
$305
This Delta deal was found by Cheapflights users on 4/20. 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.
Fri 8/75:09 pm
PHL
- ONT
1 stop7h 35m
Delta
Tue 8/115:55 pm
ONT
- PHL
1 stop9h 10m
Delta
Deal found 4/20![Delta logo]()
$306
This American Airlines deal was found by Cheapflights users on 4/20. 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 5/125:00 am
PHL
- ONT
2 stops9h 34m
American Airlines
Tue 5/1912:19 pm
ONT
- PHL
2 stops8h 40m
American Airlines
Deal found 4/20![American Airlines logo]()
$307
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 April 22, 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 April 22, 2026.
This Delta deal was found by Cheapflights users on 4/19. 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.
Fri 8/76:55 pm
PHL
- ONT
1 stop7h 49m
Delta
Thu 8/1312:00 pm
ONT
- PHL
1 stop7h 20m
Delta
Deal found 4/19![Delta logo]()
$334
This Southwest deal was found by Cheapflights users on 4/18. 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 7/85:15 am
PHL
- ONT
2 stops9h 15m
Southwest
Mon 7/2712:45 pm
ONT
- PHL
2 stops8h 55m
Southwest
Deal found 4/18![Southwest logo]()
$380
This United Airlines deal was found by Cheapflights users on 4/20. 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.
Fri 5/2910:32 am
PHL
- ONT
2 stops13h 10m
United Airlines
Mon 6/16:30 pm
ONT
- PHL
2 stops12h 15m
United Airlines
Deal found 4/20![United Airlines logo]()
$384
This KAYAK deal was found by Cheapflights users on 4/20. 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 5/115:30 pm
PHL
- ONT
1 stop7h 29m
American Airlines
Wed 5/1312:19 pm
ONT
- PHL
1 stop7h 32m
American Airlines
Deal found 4/20![American Airlines logo]()
$438
This Delta deal was found by Cheapflights users on 4/20. 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 8/237:00 am
PHL
- ONT
1 stop8h 29m
Delta
Sun 8/3012:00 pm
ONT
- PHL
1 stop7h 20m
Delta
Deal found 4/20![Delta logo]()
$349
This Southwest deal was found by Cheapflights users on 4/18. 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 6/115:00 am
PHL
- ONT
1 stop7h 05m
Southwest
Mon 6/152:30 pm
ONT
- PHL
1 stop7h 10m
Southwest
Deal found 4/18![Southwest logo]()
$399
This Delta deal was found by Cheapflights users on 4/21. 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.
Fri 8/76:55 pm
PHL
- ONT
1 stop7h 49m
Delta
Wed 8/1212:00 pm
ONT
- PHL
1 stop7h 20m
Delta
Deal found 4/21![Delta logo]()
$377
This United Airlines deal was found by Cheapflights users on 4/19. 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 5/129:55 am
PHL
- ONT
2 stops16h 04m
United Airlines
Sat 8/227:00 am
ONT
- PHL
1 stop7h 42m
United Airlines
Deal found 4/19![United Airlines logo]()
$440
This Delta deal was found by Cheapflights users on 4/19. 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 8/167:00 am
PHL
- ONT
1 stop8h 29m
Delta
Thu 8/205:05 pm
ONT
- PHL
1 stop9h 38m
Delta
Deal found 4/19![Delta logo]()
$380
This Delta deal was found by Cheapflights users on 4/21. 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 7/25:16 am
PHL
- ONT
1 stop8h 24m
Delta
Thu 7/25:59 pm
ONT
- PHL
1 stop8h 46m
Delta
Deal found 4/21![Delta logo]()
$391
This Delta deal was found by Cheapflights users on 4/17. 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 8/27:30 am
PHL
- ONT
1 stop7h 38m
Delta
Sun 8/910:00 pm
ONT
- PHL
1 stop10h 01m
Delta
Deal found 4/17![Delta logo]()
$423
This Delta deal was found by Cheapflights users on 4/21. 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.
Fri 5/225:17 am
PHL
- ONT
1 stop8h 40m
Delta
Wed 5/275:50 pm
ONT
- PHL
1 stop8h 47m
Delta
Deal found 4/21![Delta logo]()
$428
Last-minute flights from Philadelphia to OntarioDiscover last-minute flight deals from Philadelphia to Ontario. Data last updated April 22, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Ontario. Data last updated April 22, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 4/21. 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.
Fri 4/243:22 pm
PHL
- ONT
1 stop11h 36m
Frontier
Thu 5/283:30 pm
ONT
- PHL
1 stop11h 51m
Frontier
Deal found 4/21![Frontier logo]()
$300
This Frontier deal was found by Cheapflights users on 4/20. 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.
Fri 4/243:22 pm
PHL
- ONT
1 stop11h 36m
Frontier
Sun 4/265:12 pm
ONT
- PHL
1 stop9h 22m
Frontier
Deal found 4/20![Frontier logo]()
$305
This Trip.com deal was found by Cheapflights users on 4/20. 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.
Thu 4/306:43 am
PHL
- ONT
1 stop16h 42m
Frontier
Wed 5/1310:50 am
ONT
- PHL
1 stop15h 47m
Frontier
Deal found 4/20![Frontier logo]()
$296
This Frontier deal was found by Cheapflights users on 4/18. 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 5/38:36 pm
PHL
- ONT
1 stop13h 55m
Frontier
Thu 5/78:30 am
ONT
- PHL
1 stop10h 44m
Frontier
Deal found 4/18![Frontier logo]()
$306
This Booking.com deal was found by Cheapflights users on 4/21. 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.
Mon 5/48:41 pm
PHL
- ONT
1 stop16h 24m
Frontier
Mon 5/116:00 am
ONT
- PHL
1 stop20h 37m
Frontier
Deal found 4/21![Frontier logo]()
$294
This Booking.com deal was found by Cheapflights users on 4/19. 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 5/128:35 pm
PHL
- ONT
1 stop30h 14m
Frontier
Fri 8/215:43 pm
ONT
- PHL
1 stop18h 24m
Frontier
Deal found 4/19![Frontier logo]()
$304
This American Airlines deal was found by Cheapflights users on 4/20. 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 5/125:00 am
PHL
- ONT
2 stops9h 34m
American Airlines
Tue 5/1912:19 pm
ONT
- PHL
2 stops8h 40m
American Airlines
Deal found 4/20![American Airlines logo]()
$307
This CheapOair deal was found by Cheapflights users on 4/21. 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.
Wed 5/1312:17 pm
PHL
- ONT
1 stop9h 54m
Frontier
Sun 5/176:00 am
ONT
- PHL
1 stop20h 37m
Frontier
Deal found 4/21![Frontier logo]()
$297
This Kiwi.com deal was found by Cheapflights users on 4/21. 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.
Fri 5/154:35 pm
PHL
- ONT
2 stops20h 30m
Frontier
Tue 5/196:00 am
ONT
- PHL
1 stop20h 37m
Frontier
Deal found 4/21![Frontier logo]()
$313
This CheapOair deal was found by Cheapflights users on 4/21. 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 5/178:35 pm
PHL
- ONT
1 stop16h 30m
Frontier
Wed 5/2010:50 am
ONT
- PHL
1 stop15h 47m
Frontier
Deal found 4/21![Frontier logo]()
$301
This American Airlines deal was found by Cheapflights users on 4/17. 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 5/1911:50 am
PHL
- ONT
2 stops9h 34m
American Airlines
Sat 5/2312:41 pm
ONT
- PHL
1 stop8h 55m
American Airlines
Deal found 4/17![American Airlines logo]()
$303
This Frontier deal was found by Cheapflights users on 4/19. 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.
Tue 5/2610:40 am
PHL
- ONT
1 stop8h 04m
Frontier
Wed 5/274:39 pm
ONT
- PHL
1 stop9h 31m
Frontier
Deal found 4/19![Frontier logo]()
$311
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 April 22, 2026.
Search for one-way flight options from Philadelphia to Ontario. Find affordable one-way fares based on user searches. Data last updated April 22, 2026.
This Trip.com deal was found by Cheapflights users on 4/17. 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.
Wed 5/278:35 pm
PHL
- ONT
1 stop16h 30m
Frontier
Deal found 4/17![Frontier logo]()
$66
This Super.com deal was found by Cheapflights users on 4/19. 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 5/1312:17 pm
PHL
- ONT
1 stop9h 54m
Frontier
Deal found 4/19![Frontier logo]()
$79
This iWofly deal was found by Cheapflights users on 4/18. 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 iWofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/98:35 pm
PHL
- ONT
1 stop16h 30m
Frontier
Deal found 4/18![Frontier logo]()
$85
This Booking.com deal was found by Cheapflights users on 4/17. 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 5/128:35 pm
PHL
- ONT
1 stop30h 14m
Frontier
Deal found 4/17![Frontier logo]()
$86
This Trip.com deal was found by Cheapflights users on 4/19. 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.
Sun 5/108:35 pm
PHL
- ONT
1 stop16h 30m
Frontier
Deal found 4/19![Frontier logo]()
$89
This CheapOair deal was found by Cheapflights users on 4/20. 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.
Sat 5/238:35 pm
PHL
- ONT
1 stop16h 30m
Frontier
Deal found 4/20![Frontier logo]()
$92
This American Airlines deal was found by Cheapflights users on 4/20. 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 5/125:00 am
PHL
- ONT
2 stops9h 34m
American Airlines
Deal found 4/20![American Airlines logo]()
$94
This Frontier deal was found by Cheapflights users on 4/21. 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.
Wed 5/612:17 pm
PHL
- ONT
1 stop9h 54m
Frontier
Deal found 4/21![Frontier logo]()
$100
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 April 22, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $290 (Frontier) |
One-way from | $66 (Trip.com) |
Popular in | March |
Cheapest in | May |
Average price | $415 |
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 April 22, 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
Fri 8/7
6:55 pm-11:44 pm
1 stop7h 49m
Ontario
Thu 8/13
12:00 pm-10:20 pm
1 stop7h 20m
$334
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Sun 8/23
7:00 am-12:29 pm
1 stop8h 29m
Ontario
Sun 8/30
12:00 pm-10:20 pm
1 stop7h 20m
$349
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Fri 8/7
6:55 pm-11:44 pm
1 stop7h 49m
Ontario
Wed 8/12
12:00 pm-10:20 pm
1 stop7h 20m
$377
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Wed 7/8
5:15 am-11:30 am
2 stops9h 15m
Ontario
Mon 7/27
12:45 pm-12:40 am
2 stops8h 55m
$380
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Sun 8/16
7:00 am-12:29 pm
1 stop8h 29m
Ontario
Thu 8/20
5:05 pm-5:43 am
1 stop9h 38m
$380
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Fri 5/29
10:32 am-8:42 pm
2 stops13h 10m
Ontario
Mon 6/1
6:30 pm-9:45 am
2 stops12h 15m
$384
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Thu 7/2
5:16 am-10:40 am
1 stop8h 24m
Ontario
Thu 7/2
5:59 pm-5:45 am
1 stop8h 46m
$391
Quickest round-trip
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Thu 6/11
5:00 am-9:05 am
1 stop7h 05m
Ontario
Mon 6/15
2:30 pm-12:40 am
1 stop7h 10m
$399
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Sun 8/2
7:30 am-12:08 pm
1 stop7h 38m
Ontario
Sun 8/9
10:00 pm-11:01 am
1 stop10h 01m
$423
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Fri 5/22
5:17 am-10:57 am
1 stop8h 40m
Ontario
Wed 5/27
5:50 pm-5:37 am
1 stop8h 47m
$428
Showing 1-10 of 22 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 April.
| 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
How far ahead should I book a flight from Philadelphia to Ontario?
Use this chart to determine the optimal time to book a round-trip flight from Philadelphia to Ontario. Price data was last updated on April 17, 2026.
The best time to book flights from Philadelphia to Ontario is 73 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, May is the cheapest month in which you can book a flight from Philadelphia to Ontario (average of $355). 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 April 22, 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.
Entertainment
7.5
Overall
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Overall
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Overall
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Overall
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Overall
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Overall
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
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 April 22, 2026.
Philadelphia and Ontario flights
Browse other Philadelphia and Ontario flight options. Last updated on April 22, 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 April 22, 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 April 22, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$155 | Average$322 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$208 | Average$478 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$305 | Average$486 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$305 | Average$461 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$374 | Average$496 | FlexibilityNo cancel fee | On-time63% |