$127+ 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 5/28. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ONT
Jun 17 — Jun 241
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 May 18, 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 May 18, 2026.
This United Airlines deal was found by Cheapflights users on 5/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/316:00 am
PHL
- ONT
1 stop9h 12m
United Airlines
Mon 8/317:13 pm
ONT
- PHL
2 stops11h 45m
United Airlines
Deal found 5/15![United Airlines logo]()
$268
This American Airlines deal was found by Cheapflights users on 5/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2811:05 am
PHL
- ONT
1 stop10h 14m
American Airlines
Sat 8/810:10 pm
ONT
- PHL
1 stop10h 07m
American Airlines
Deal found 5/15![American Airlines logo]()
$277
This American Airlines deal was found by Cheapflights users on 5/18. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/94:17 pm
PHL
- ONT
1 stop8h 40m
American Airlines
Sat 6/131:11 pm
ONT
- PHL
1 stop7h 46m
American Airlines
Deal found 5/18![American Airlines logo]()
$282
This American Airlines deal was found by Cheapflights users on 5/17. 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.
Sat 7/184:55 pm
PHL
- ONT
1 stop8h 39m
American Airlines
Sat 7/252:15 pm
ONT
- PHL
1 stop7h 20m
American Airlines
Deal found 5/17![American Airlines logo]()
$290
This American Airlines deal was found by Cheapflights users on 5/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/113:52 pm
PHL
- ONT
1 stop9h 44m
American Airlines
Thu 6/181:11 pm
ONT
- PHL
1 stop7h 46m
American Airlines
Deal found 5/14![American Airlines logo]()
$295
This American Airlines deal was found by Cheapflights users on 5/18. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2212:04 pm
PHL
- ONT
2 stops9h 11m
American Airlines
Tue 8/2511:59 pm
ONT
- PHL
1 stop10h 04m
American Airlines
Deal found 5/18![American Airlines logo]()
$297
This American Airlines deal was found by Cheapflights users on 5/16. 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 8/47:05 am
PHL
- ONT
1 stop7h 58m
American Airlines
Tue 8/2511:59 pm
ONT
- PHL
1 stop10h 04m
American Airlines
Deal found 5/16![American Airlines logo]()
$299
This United Airlines deal was found by Cheapflights users on 5/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/216:00 am
PHL
- ONT
1 stop9h 12m
United Airlines
Tue 8/259:15 am
ONT
- PHL
1 stop10h 16m
United Airlines
Deal found 5/18![United Airlines logo]()
$301
This American Airlines deal was found by Cheapflights users on 5/18. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/14:17 pm
PHL
- ONT
1 stop8h 40m
American Airlines
Wed 7/87:14 pm
ONT
- PHL
1 stop7h 21m
American Airlines
Deal found 5/18![American Airlines logo]()
$303
This Delta deal was found by Cheapflights users on 5/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/175:09 pm
PHL
- ONT
1 stop7h 41m
Delta
Wed 7/2210:00 pm
ONT
- PHL
1 stop9h 57m
Delta
Deal found 5/14![Delta logo]()
$306
This Delta deal was found by Cheapflights users on 5/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/15:15 am
PHL
- ONT
1 stop8h 25m
Delta
Tue 7/76:01 pm
ONT
- PHL
1 stop8h 28m
Delta
Deal found 5/15![Delta 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 May 18, 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 May 18, 2026.
This Delta deal was found by Cheapflights users on 5/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/66:40 pm
PHL
- ONT
1 stop8h 08m
Delta
Tue 11/177:00 am
ONT
- PHL
1 stop8h 19m
Delta
Deal found 5/15![Delta logo]()
$306
This United Airlines deal was found by Cheapflights users on 5/14. 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.
Sat 11/71:00 pm
PHL
- ONT
2 stops10h 20m
United Airlines
Wed 11/186:00 am
ONT
- PHL
1 stop7h 58m
United Airlines
Deal found 5/14![United Airlines logo]()
$347
This Alaska Airlines deal was found by Cheapflights users on 5/14. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/87:00 am
PHL
- ONT
1 stop11h 15m
Alaska Airlines
Wed 11/184:09 pm
ONT
- PHL
1 stop10h 24m
Alaska Airlines
Deal found 5/14![Alaska Airlines logo]()
$349
This Southwest deal was found by Cheapflights users on 5/16. 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 6/242:20 pm
PHL
- ONT
2 stops9h 00m
Southwest
Mon 7/2712:45 pm
ONT
- PHL
2 stops8h 55m
Southwest
Deal found 5/16![Southwest logo]()
$423
This Delta deal was found by Cheapflights users on 5/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/85:30 am
PHL
- ONT
1 stop8h 57m
Delta
Thu 11/195:50 pm
ONT
- PHL
1 stop9h 13m
Delta
Deal found 5/15![Delta logo]()
$370
This Alaska Airlines deal was found by Cheapflights users on 5/14. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/44:45 pm
PHL
- ONT
1 stop10h 11m
Alaska Airlines
Wed 6/175:54 pm
ONT
- PHL
1 stop9h 19m
Alaska Airlines
Deal found 5/14![Alaska Airlines logo]()
$416
This Delta deal was found by Cheapflights users on 5/17. 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.
Sat 7/116:00 am
PHL
- ONT
1 stop7h 38m
Delta
Fri 7/177:05 am
ONT
- PHL
1 stop7h 07m
Delta
Deal found 5/17![Delta logo]()
$416
This United Airlines deal was found by Cheapflights users on 5/14. 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.
Thu 7/166:00 am
PHL
- ONT
1 stop9h 12m
United Airlines
Thu 7/231:50 pm
ONT
- PHL
2 stops12h 41m
United Airlines
Deal found 5/14![United Airlines logo]()
$520
This Delta deal was found by Cheapflights users on 5/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/255:12 pm
PHL
- ONT
1 stop7h 36m
Delta
Sun 6/2810:00 pm
ONT
- PHL
1 stop8h 34m
Delta
Deal found 5/18![Delta logo]()
$431
This Alaska Airlines deal was found by Cheapflights users on 5/16. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/155:46 pm
PHL
- ONT
1 stop9h 06m
Alaska Airlines
Mon 8/243:05 pm
ONT
- PHL
1 stop11h 35m
Alaska Airlines
Deal found 5/16![Alaska Airlines logo]()
$478
This Delta deal was found by Cheapflights users on 5/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/296:45 pm
PHL
- ONT
1 stop7h 49m
Delta
Wed 6/35:50 pm
ONT
- PHL
2 stops13h 40m
Delta
Deal found 5/14![Delta logo]()
$438
This Delta deal was found by Cheapflights users on 5/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/317:25 am
PHL
- ONT
1 stop7h 54m
Delta
Fri 6/512:07 pm
ONT
- PHL
1 stop7h 05m
Delta
Deal found 5/15![Delta logo]()
$494
Last-minute flights from Philadelphia to OntarioDiscover last-minute flight deals from Philadelphia to Ontario. Data last updated May 18, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Ontario. Data last updated May 18, 2026 and is based on user searches.
This KAYAK deal was found by Cheapflights users on 5/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/285:17 pm
PHL
- ONT
1 stop7h 31m
Delta
Fri 5/295:50 pm
ONT
- PHL
1 stop8h 47m
Delta
Deal found 5/15![Delta logo]()
$334
This CheapOair deal was found by Cheapflights users on 5/16. 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 6/38:35 pm
PHL
- ONT
1 stop16h 30m
Frontier
Tue 6/93:34 pm
ONT
- PHL
1 stop11h 53m
Frontier
Deal found 5/16![Frontier logo]()
$340
This Delta deal was found by Cheapflights users on 5/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/64:06 pm
PHL
- ONT
1 stop8h 42m
Delta
Sat 6/1311:50 am
ONT
- PHL
1 stop10h 10m
Delta
Deal found 5/15![Delta logo]()
$311
This American Airlines deal was found by Cheapflights users on 5/18. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/94:17 pm
PHL
- ONT
1 stop8h 40m
American Airlines
Sat 6/131:11 pm
ONT
- PHL
1 stop7h 46m
American Airlines
Deal found 5/18![American Airlines logo]()
$282
This United Airlines deal was found by Cheapflights users on 5/16. 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 6/96:00 am
PHL
- ONT
1 stop9h 12m
United Airlines
Fri 6/126:30 pm
ONT
- PHL
1 stop8h 01m
United Airlines
Deal found 5/16![United Airlines logo]()
$322
This Frontier deal was found by Cheapflights users on 5/18. 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.
Wed 6/1011:00 am
PHL
- ONT
1 stop11h 51m
Frontier
Sat 6/133:34 pm
ONT
- PHL
1 stop11h 53m
Frontier
Deal found 5/18![Frontier logo]()
$330
This American Airlines deal was found by Cheapflights users on 5/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/113:52 pm
PHL
- ONT
1 stop9h 44m
American Airlines
Thu 6/181:11 pm
ONT
- PHL
1 stop7h 46m
American Airlines
Deal found 5/14![American Airlines logo]()
$295
This American Airlines deal was found by Cheapflights users on 5/16. 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.
Fri 6/125:00 am
PHL
- ONT
1 stop7h 31m
American Airlines
Tue 6/167:13 pm
ONT
- PHL
1 stop8h 23m
American Airlines
Deal found 5/16![American Airlines logo]()
$327
This American Airlines deal was found by Cheapflights users on 5/16. 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.
Sat 6/135:09 pm
PHL
- ONT
1 stop8h 27m
American Airlines
Sat 6/202:18 pm
ONT
- PHL
1 stop7h 18m
American Airlines
Deal found 5/16![American Airlines logo]()
$317
This Expedia deal was found by Cheapflights users on 5/17. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1711:00 am
PHL
- ONT
1 stop11h 51m
Frontier
Tue 6/235:43 pm
ONT
- PHL
1 stop18h 24m
Frontier
Deal found 5/17![Frontier logo]()
$310
This American Airlines deal was found by Cheapflights users on 5/16. 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 6/244:17 pm
PHL
- ONT
1 stop8h 40m
American Airlines
Mon 7/2710:10 pm
ONT
- PHL
1 stop8h 31m
American Airlines
Deal found 5/16![American Airlines logo]()
$328
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 May 18, 2026.
Search for one-way flight options from Philadelphia to Ontario. Find affordable one-way fares based on user searches. Data last updated May 18, 2026.
This United Airlines deal was found by Cheapflights users on 5/14. 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.
Thu 5/286:00 am
PHL
- ONT
1 stop9h 12m
United Airlines
Deal found 5/14![United Airlines logo]()
$127
This Delta deal was found by Cheapflights users on 5/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/285:17 pm
PHL
- ONT
1 stop7h 31m
Delta
Deal found 5/15![Delta logo]()
$132
This United Airlines deal was found by Cheapflights users on 5/14. 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 5/279:21 am
PHL
- ONT
2 stops11h 07m
United Airlines
Deal found 5/14![United Airlines logo]()
$137
This Jettzy deal was found by Cheapflights users on 5/15. 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 Jettzy is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2911:35 am
PHL
- ONT
1 stop7h 55m
Frontier
Deal found 5/15![Frontier logo]()
$152
This American Airlines deal was found by Cheapflights users on 5/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/165:30 pm
PHL
- ONT
1 stop9h 29m
American Airlines
Deal found 5/15![American Airlines logo]()
$153
This Super.com deal was found by Cheapflights users on 5/15. 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.
Tue 8/411:06 am
PHL
- ONT
1 stop11h 47m
Frontier
Deal found 5/15![Frontier logo]()
$154
This Super.com deal was found by Cheapflights users on 5/18. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1011:00 am
PHL
- ONT
1 stop11h 51m
Frontier
Deal found 5/18![Frontier logo]()
$157
This American Airlines deal was found by Cheapflights users on 5/17. 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.
Sat 7/184:55 pm
PHL
- ONT
1 stop8h 39m
American Airlines
Deal found 5/17![American Airlines logo]()
$159
This Super.com deal was found by Cheapflights users on 5/17. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2111:06 am
PHL
- ONT
1 stop11h 47m
Frontier
Deal found 5/17![Frontier logo]()
$160
This Frontier deal was found by Cheapflights users on 5/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/3011:00 am
PHL
- ONT
1 stop11h 51m
Frontier
Deal found 5/14![Frontier logo]()
$161
This Kiwi.com deal was found by Cheapflights users on 5/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/149:08 pm
PHL
- ONT
2 stops38h 59m
Multiple Airlines
Deal found 5/17![Multiple Airlines logo]()
$166
This Super.com deal was found by Cheapflights users on 5/14. 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 7/211:35 am
PHL
- ONT
1 stop8h 13m
Frontier
Deal found 5/14![Frontier logo]()
$168
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 May 18, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $268 (United Airlines) |
One-way from | $127 (United Airlines) |
Popular in | March |
Cheapest in | September |
Average price | $355 |
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 May 18, 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 11/6
6:40 pm-11:48 pm
1 stop8h 08m
Ontario
Tue 11/17
7:00 am-6:19 pm
1 stop8h 19m
$306
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Sat 11/7
1:00 pm-8:20 pm
2 stops10h 20m
Ontario
Wed 11/18
6:00 am-4:58 pm
1 stop7h 58m
$347
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Sun 11/8
7:00 am-3:15 pm
1 stop11h 15m
Ontario
Wed 11/18
4:09 pm-5:33 am
1 stop10h 24m
$349
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Sun 11/8
5:30 am-11:27 am
1 stop8h 57m
Ontario
Thu 11/19
5:50 pm-6:03 am
1 stop9h 13m
$370
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Thu 6/4
4:45 pm-11:56 pm
1 stop10h 11m
Ontario
Wed 6/17
5:54 pm-6:13 am
1 stop9h 19m
$416
Quickest round-trip
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Sat 7/11
6:00 am-10:38 am
1 stop7h 38m
Ontario
Fri 7/17
7:05 am-5:12 pm
1 stop7h 07m
$416
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Wed 6/24
2:20 pm-8:20 pm
2 stops9h 00m
Ontario
Mon 7/27
12:45 pm-12:40 am
2 stops8h 55m
$423
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Thu 6/25
5:12 pm-9:48 pm
1 stop7h 36m
Ontario
Sun 6/28
10:00 pm-9:34 am
1 stop8h 34m
$431
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Fri 5/29
6:45 pm-11:34 pm
1 stop7h 49m
Ontario
Wed 6/3
5:50 pm-10:30 am
2 stops13h 40m
$438
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Sat 8/15
5:46 pm-11:52 pm
1 stop9h 06m
Ontario
Mon 8/24
3:05 pm-5:40 am
1 stop11h 35m
$478
Showing 1-10 of 21 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 May.
| 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?
The best time to book flights from Philadelphia to Ontario is 72 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 May 18, 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
Food
7.0
Crew
8.6
Comfort
8.0
Boarding
8.1
Overall
7.9
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Food
7.0
Crew
8.6
Comfort
8.0
Boarding
8.1
Overall
7.9
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Food
7.0
Crew
8.6
Comfort
8.0
Boarding
8.1
Overall
7.9
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Food
7.0
Crew
8.6
Comfort
8.0
Boarding
8.1
Overall
7.9
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Food
7.0
Crew
8.6
Comfort
8.0
Boarding
8.1
Overall
7.9
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Food
7.0
Crew
8.6
Comfort
8.0
Boarding
8.1
Overall
7.9
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 May 18, 2026.
Philadelphia and Ontario flights
Browse other Philadelphia and Ontario flight options. Last updated on May 18, 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 May 18, 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 May 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$155 | Average$344 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$256 | Average$370 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$290 | Average$483 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$300 | Average$469 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$369 | Average$496 | FlexibilityNo cancel fee | On-time63% |