$117+ Cheap flights from Ontario to Philadelphia (ONT - PHL)
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 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PHL
Sep 28 — Oct 51
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Philadelphia with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Ontario to Philadelphia
Cheapest
Best
Last-minute
One-way
Cheapest flights from Ontario to PhiladelphiaExplore the most affordable flight options available from Ontario to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 29, 2026.
Explore the most affordable flight options available from Ontario to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 29, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2011:52 am -
1 stop10h 24m
Tue 10/2712:36 pm -
2 stops24h 59m
Deal found 8/25![Frontier logo]()
$254
This Frontier deal was found by Cheapflights users on 8/27. 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 10/135:25 pm -
1 stop10h 53m
Tue 10/206:00 am -
1 stop13h 48m
Deal found 8/27![Frontier logo]()
$258
This Frontier deal was found by Cheapflights users on 8/25. 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 10/86:15 am -
1 stop16h 01m
Wed 10/145:50 am -
1 stop21h 00m
Deal found 8/25![Frontier logo]()
$259
This Frontier deal was found by Cheapflights users on 8/27. 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 10/1411:52 am -
1 stop8h 58m
Sun 10/188:44 pm -
1 stop13h 20m
Deal found 8/27![Frontier logo]()
$264
This FlightHub deal was found by Cheapflights users on 8/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/86:15 am -
1 stop16h 01m
Tue 10/135:50 am -
1 stop7h 39m
Deal found 8/26![Frontier logo]()
$267
This CheapOair deal was found by Cheapflights users on 8/26. 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 10/86:15 am -
1 stop16h 01m
Mon 10/128:44 pm -
1 stop22h 46m
Deal found 8/26![Frontier logo]()
$268
This Expedia deal was found by Cheapflights users on 8/27. 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.
Fri 10/911:52 am -
1 stop10h 24m
Sun 10/118:59 pm -
1 stop13h 05m
Deal found 8/27![Frontier logo]()
$270
This Kiwi.com deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2211:45 am -
2 stops16h 31m
Tue 9/296:00 am -
1 stop13h 46m
Deal found 8/26![Frontier logo]()
$272
This FlightHub deal was found by Cheapflights users on 8/25. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/98:35 pm -
1 stop7h 43m
Mon 10/128:44 pm -
1 stop15h 25m
Deal found 8/25![Frontier logo]()
$273
This CheapOair deal was found by Cheapflights users on 8/26. 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.
Fri 10/96:15 am -
1 stop16h 01m
Tue 10/138:44 pm -
1 stop15h 25m
Deal found 8/26![Frontier logo]()
$274
Best flights from Ontario to PhiladelphiaDiscover carefully curated flight deals from Ontario to Philadelphia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 29, 2026.
Discover carefully curated flight deals from Ontario to Philadelphia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 29, 2026.
This Delta deal was found by Cheapflights users on 8/24. 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 11/36:00 am -
1 stop8h 39m
Sat 11/147:15 am -
1 stop8h 02m
Deal found 8/24![Delta logo]()
$357
This Southwest deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2610:15 am -
2 stops9h 40m
Wed 9/301:45 pm -
1 stop8h 55m
Deal found 8/26![Southwest logo]()
$362
This United Airlines deal was found by Cheapflights users on 8/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/36:00 am -
1 stop8h 15m
Sat 11/71:16 pm -
1 stop8h 31m
Deal found 8/28![United Airlines logo]()
$467
This Delta deal was found by Cheapflights users on 8/23. 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 12/145:04 pm -
1 stop9h 51m
Tue 1/56:40 pm -
1 stop8h 08m
Deal found 8/23![Delta logo]()
$357
This Southwest deal was found by Cheapflights users on 8/25. 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 12/1510:05 am -
2 stops9h 00m
Tue 1/511:45 am -
1 stop9h 30m
Deal found 8/25![Southwest logo]()
$362
This Delta deal was found by Cheapflights users on 8/24. 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 11/312:16 pm -
1 stop8h 33m
Mon 11/166:58 pm -
1 stop7h 51m
Deal found 8/24![Delta logo]()
$357
This Southwest deal was found by Cheapflights users on 8/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1810:55 am -
1 stop7h 25m
Sat 11/217:05 am -
1 stop14h 00m
Deal found 8/28![Southwest logo]()
$389
This Delta deal was found by Cheapflights users on 8/24. 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 10/3112:16 pm -
1 stop9h 40m
Sun 11/87:20 am -
1 stop8h 16m
Deal found 8/24![Delta logo]()
$363
This Delta deal was found by Cheapflights users on 8/23. 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 12/166:00 am -
1 stop8h 47m
Mon 1/46:35 am -
1 stop7h 52m
Deal found 8/23![Delta logo]()
$363
This Southwest deal was found by Cheapflights users on 8/25. 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 9/308:35 am -
2 stops9h 05m
Sun 10/45:20 am -
1 stop7h 55m
Deal found 8/25![Southwest logo]()
$403
This Delta deal was found by Cheapflights users on 8/26. 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 12/1711:08 pm -
1 stop7h 21m
Tue 1/55:30 am -
1 stop8h 57m
Deal found 8/26![Delta logo]()
$363
This Delta deal was found by Cheapflights users on 8/24. 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 9/1410:00 pm -
1 stop8h 27m
Fri 9/186:52 pm -
1 stop7h 55m
Deal found 8/24![Delta logo]()
$374
Last-minute flights from Ontario to PhiladelphiaDiscover last-minute flight deals from Ontario to Philadelphia. Data last updated August 29, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Philadelphia. Data last updated August 29, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 8/24. 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 9/83:40 pm -
1 stop11h 50m
Sat 9/196:00 am -
1 stop13h 46m
Deal found 8/24![Frontier logo]()
$316
This Booking.com deal was found by Cheapflights users on 8/26. 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.
Wed 9/163:14 pm -
1 stop11h 26m
Sat 9/266:00 am -
1 stop13h 46m
Deal found 8/26![Multiple Airlines logo]()
$320
This Trip.com deal was found by Cheapflights users on 8/27. 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 9/1711:45 am -
2 stops18h 20m
Tue 9/226:00 am -
1 stop13h 46m
Deal found 8/27![Frontier logo]()
$327
This Booking.com deal was found by Cheapflights users on 8/26. 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.
Sat 9/193:14 pm -
1 stop11h 26m
Sat 10/36:00 am -
1 stop13h 46m
Deal found 8/26![Multiple Airlines logo]()
$355
This Kiwi.com deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2211:45 am -
2 stops16h 31m
Tue 9/296:00 am -
1 stop13h 46m
Deal found 8/26![Frontier logo]()
$272
This Expedia deal was found by Cheapflights users on 8/26. 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.
Tue 9/227:12 am -
1 stop29h 33m
Tue 9/296:00 am -
1 stop13h 46m
Deal found 8/26![Multiple Airlines logo]()
$319
This Gotogate deal was found by Cheapflights users on 8/26. 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.
Tue 9/223:14 pm -
1 stop11h 26m
Tue 10/66:00 am -
1 stop13h 46m
Deal found 8/26![Multiple Airlines logo]()
$347
This Kiwi.com deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:15 am -
2 stops14h 03m
Tue 10/66:00 am -
1 stop13h 46m
Deal found 8/24![Frontier logo]()
$340
This Kiwi.com deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2311:45 am -
2 stops27h 29m
Wed 9/306:00 am -
1 stop15h 16m
Deal found 8/26![Frontier logo]()
$354
This Trip.com deal was found by Cheapflights users on 8/27. 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.
Sat 9/263:14 pm -
1 stop11h 26m
Sat 10/36:00 am -
1 stop13h 46m
Deal found 8/27![Multiple Airlines logo]()
$304
This Mytrip deal was found by Cheapflights users on 8/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/266:02 am -
1 stop8h 54m
Tue 9/296:00 am -
1 stop13h 46m
Deal found 8/27![Multiple Airlines logo]()
$318
One-way flights from Ontario to PhiladelphiaSearch for one-way flight options from Ontario to Philadelphia. Find affordable one-way fares based on user searches. Data last updated August 29, 2026.
Search for one-way flight options from Ontario to Philadelphia. Find affordable one-way fares based on user searches. Data last updated August 29, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2811:52 am -
2 stops16h 19m
Deal found 8/27![Frontier logo]()
$117
This Kiwi.com deal was found by Cheapflights users on 8/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/306:15 am -
2 stops22h 01m
Deal found 8/27![Frontier logo]()
$120
This Kiwi.com deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2111:52 am -
2 stops16h 19m
Deal found 8/25![Frontier logo]()
$122
This Super.com deal was found by Cheapflights users on 8/24. 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 10/1411:52 am -
1 stop8h 59m
Deal found 8/24![Frontier logo]()
$127
This Super.com deal was found by Cheapflights users on 8/25. 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 10/135:25 pm -
1 stop10h 53m
Deal found 8/25![Frontier logo]()
$133
This Super.com deal was found by Cheapflights users on 8/26. 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 10/86:15 am -
1 stop16h 01m
Deal found 8/26![Frontier logo]()
$134
This Frontier deal was found by Cheapflights users on 8/26. 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 10/98:35 pm -
1 stop7h 43m
Deal found 8/26![Frontier logo]()
$135
This Super.com deal was found by Cheapflights users on 8/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1010:04 am -
1 stop18h 14m
Deal found 8/28![Frontier logo]()
$139
This CheapOair deal was found by Cheapflights users on 8/25. 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.
Mon 10/262:28 pm -
1 stop13h 50m
Deal found 8/25![Frontier logo]()
$140
This Frontier deal was found by Cheapflights users on 8/25. 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 10/1611:52 am -
1 stop10h 24m
Deal found 8/25![Frontier logo]()
$141
This Kiwi.com deal was found by Cheapflights users on 8/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/196:15 am -
2 stops14h 03m
Deal found 8/27![Frontier logo]()
$145
Find flight deals from Ontario to Philadelphia
Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Philadelphia (PHL). 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 August 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $254 (Kiwi.com) |
One-way from | $117 (Kiwi.com) |
Popular in | December |
Cheapest in | July |
Average price | $424 |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Philadelphia 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 7,457,451 searches. Data last updated August 29, 2026.
Use the filters below to find and compare flights from Ontario to Philadelphia that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioPhiladelphia
ONT Ontario - PHL Philadelphia
ONTPHL
Ontario
Tue 11/3
6:00 am-5:39 pm
1 stop8h 39m
Philadelphia
Sat 11/14
7:15 am-12:17 pm
1 stop8h 02m
$357
OntarioPhiladelphia
ONT Ontario - PHL Philadelphia
ONTPHL
Ontario
Mon 12/14
5:04 pm-5:55 am
1 stop9h 51m
Philadelphia
Tue 1/5
6:40 pm-11:48 pm
1 stop8h 08m
$357
OntarioPhiladelphia
ONT Ontario - PHL Philadelphia
ONTPHL
Ontario
Tue 11/3
12:16 pm-11:49 pm
1 stop8h 33m
Philadelphia
Mon 11/16
6:58 pm-11:49 pm
1 stop7h 51m
$357
OntarioPhiladelphia
ONT Ontario - PHL Philadelphia
ONTPHL
Ontario
Sat 9/26
10:15 am-10:55 pm
2 stops9h 40m
Philadelphia
Wed 9/30
1:45 pm-7:40 pm
1 stop8h 55m
$362
OntarioPhiladelphia
ONT Ontario - PHL Philadelphia
ONTPHL
Ontario
Tue 12/15
10:05 am-10:05 pm
2 stops9h 00m
Philadelphia
Tue 1/5
11:45 am-6:15 pm
1 stop9h 30m
$362
OntarioPhiladelphia
ONT Ontario - PHL Philadelphia
ONTPHL
Ontario
Sat 10/31
12:16 pm-12:56 am
1 stop9h 40m
Philadelphia
Sun 11/8
7:20 am-12:36 pm
1 stop8h 16m
$363
OntarioPhiladelphia
ONT Ontario - PHL Philadelphia
ONTPHL
Ontario
Wed 12/16
6:00 am-5:47 pm
1 stop8h 47m
Philadelphia
Mon 1/4
6:35 am-11:27 am
1 stop7h 52m
$363
Quickest round-trip
OntarioPhiladelphia
ONT Ontario - PHL Philadelphia
ONTPHL
Ontario
Thu 12/17
11:08 pm-9:29 am
1 stop7h 21m
Philadelphia
Tue 1/5
5:30 am-11:27 am
1 stop8h 57m
$363
OntarioPhiladelphia
ONT Ontario - PHL Philadelphia
ONTPHL
Ontario
Mon 9/14
10:00 pm-9:27 am
1 stop8h 27m
Philadelphia
Fri 9/18
6:52 pm-11:47 pm
1 stop7h 55m
$374
OntarioPhiladelphia
ONT Ontario - PHL Philadelphia
ONTPHL
Ontario
Wed 11/18
10:55 am-9:20 pm
1 stop7h 25m
Philadelphia
Sat 11/21
7:05 am-6:05 pm
1 stop14h 00m
$389
Showing 1-10 of 22 resultsSorted by cheapest first
Compare providers for flights from Ontario to Philadelphia
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 Ontario to Philadelphia in August.
| 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 | |
| Price Accuracy2 stars | Trust Score*1 star | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Ontario-Philadelphia flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Philadelphia flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Philadelphia flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ontario-Philadelphia 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 Ontario-Philadelphia 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 Ontario to Philadelphia
Have a flexible travel schedule? Discover the best time to fly to Philadelphia from Ontario with our price prediction graph.
ONT-PHL
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Ontario to Philadelphia
How far ahead should I book a flight from Ontario to Philadelphia?
The best time to book flights from Ontario to Philadelphia is 38 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Ontario to Philadelphia?
Currently, July is the cheapest month in which you can book a flight from Ontario to Philadelphia (average of $358). Flying from Ontario to Philadelphia in December is currently the most expensive (average of $521). 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 Ontario to Philadelphia?
Airfare is below average for this route at the moment.
Ontario to Philadelphia flights typically cost between $341 and $466 in October.The cheapest round-trip price found within the last 5 days was $254 on Frontier (Oct 20-Oct 27).
Reviews of airlines servicing Philadelphia
Get insights into the airlines that provide service to Philadelphia. 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 Philadelphia. Reviews last updated August 29, 2026.
Get a feel of what it's like to fly with Southwest,Delta, andUnited Airlines from Ontario to Philadelphia by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Overall
8.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Overall
8.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Overall
8.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Overall
8.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Overall
8.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Comfort
8.0
Crew
8.6
Entertainment
7.5
Overall
8.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Related info for your journey
Find useful and relevant information for your journey from Ontario to Philadelphia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Philadelphia?
Book flights to Philadelphia if you plan to visit one of these locationsWildwood
Reading
King of Prussia
Camden
Wildwood Crest
Ocean City
Cherry Hill
Lewes
Plymouth Meeting
Wyomissing
Pottstown
Ephrata
Milford
Dover
Elkton
Essington
Willow Grove
New Castle
Millville
Vineland
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Ontario and Philadelphia flights
Browse other Ontario and Philadelphia flight options. Last updated on August 29, 2026.
Other flights from Ontario
Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on August 29, 2026.
Other flights to Philadelphia
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Top 5 airlines flying from Ontario to Philadelphia
Discover the top 5 airlines that operate flights from Ontario to Philadelphia. 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 7,457,451 searches. Data last updated August 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$151 | Average$275 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$282 | Average$454 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$312 | Average$462 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$317 | Average$435 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$346 | Average$456 | FlexibilityNo cancel fee | On-time63% |