$60+ 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 4/29. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ONT
May 7 — May 141
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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
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 Philadelphia to Ontario
Cheapest
Best
Last-minute
One-way
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 7, 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 7, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/58:35 pm
PHL
- ONT
1 stop16h 30m
Frontier
Wed 5/136:00 am
ONT
- PHL
1 stop20h 37m
Frontier
Deal found 4/3![Frontier logo]()
$124
This Kiwi.com deal was found by Cheapflights users on 4/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/308:41 pm
PHL
- ONT
1 stop13h 50m
Frontier
Wed 5/66:00 am
ONT
- PHL
1 stop20h 37m
Frontier
Deal found 4/3![Frontier logo]()
$131
This Kiwi.com deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/48:41 pm
PHL
- ONT
1 stop16h 24m
Frontier
Mon 5/116:00 am
ONT
- PHL
1 stop20h 37m
Frontier
Deal found 4/5![Frontier logo]()
$138
This Trip.com deal was found by Cheapflights users on 4/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/248:41 pm
PHL
- ONT
1 stop30h 14m
Frontier
Mon 4/2712:59 am
ONT
- PHL
1 stop25h 35m
Frontier
Deal found 4/3![Frontier logo]()
$148
This Trip.com deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/276:43 am
PHL
- ONT
1 stop9h 27m
Frontier
Tue 4/2812:59 am
ONT
- PHL
1 stop25h 35m
Frontier
Deal found 4/2![Frontier logo]()
$149
This Trip.com deal was found by Cheapflights users on 4/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/18:41 pm
PHL
- ONT
1 stop30h 14m
Frontier
Sun 5/312:59 am
ONT
- PHL
1 stop25h 35m
Frontier
Deal found 4/3![Frontier logo]()
$156
This Expedia deal was found by Cheapflights users on 4/5. 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 5/88:35 pm
PHL
- ONT
1 stop30h 14m
Frontier
Sun 5/108:30 am
ONT
- PHL
1 stop10h 44m
Frontier
Deal found 4/5![Frontier logo]()
$160
This Booking.com deal was found by Cheapflights users on 4/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/308:41 pm
PHL
- ONT
1 stop13h 50m
Frontier
Sun 5/312:59 am
ONT
- PHL
1 stop25h 35m
Frontier
Deal found 4/3![Frontier logo]()
$162
This Trip.com deal was found by Cheapflights users on 4/6. 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 4/233:41 pm
PHL
- ONT
1 stop11h 14m
Frontier
Mon 4/2712:59 am
ONT
- PHL
1 stop25h 35m
Frontier
Deal found 4/6![Frontier logo]()
$163
This Booking.com deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/233:41 pm
PHL
- ONT
1 stop11h 14m
Frontier
Sat 4/2512:59 am
ONT
- PHL
1 stop25h 35m
Frontier
Deal found 4/2![Frontier logo]()
$167
This Trip.com deal was found by Cheapflights users on 4/6. 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 4/228:41 pm
PHL
- ONT
1 stop13h 50m
Frontier
Tue 4/2812:59 am
ONT
- PHL
1 stop25h 35m
Frontier
Deal found 4/6![Frontier logo]()
$169
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 7, 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 7, 2026.
This Delta deal was found by Cheapflights users on 4/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1112:02 pm
PHL
- ONT
1 stop8h 59m
Delta
Sat 8/227:00 am
ONT
- PHL
1 stop7h 25m
Delta
Deal found 4/3![Delta logo]()
$263
This Southwest deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/82:15 pm
PHL
- ONT
2 stops10h 00m
Southwest
Sun 5/103:00 pm
ONT
- PHL
1 stop7h 15m
Southwest
Deal found 4/5![Southwest logo]()
$354
This United Airlines deal was found by Cheapflights users on 4/4. 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 5/29:55 am
PHL
- ONT
2 stops16h 04m
United Airlines
Mon 5/46:59 pm
ONT
- PHL
1 stop10h 01m
United Airlines
Deal found 4/4![United Airlines logo]()
$378
This Delta deal was found by Cheapflights users on 4/5. 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 8/306:45 am
PHL
- ONT
1 stop7h 19m
Delta
Sat 9/56:00 am
ONT
- PHL
1 stop8h 47m
Delta
Deal found 4/5![Delta logo]()
$306
This Delta deal was found by Cheapflights users on 4/6. 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 5/226:45 pm
PHL
- ONT
1 stop7h 49m
Delta
Thu 5/285:50 pm
ONT
- PHL
1 stop8h 47m
Delta
Deal found 4/6![Delta logo]()
$326
This Southwest deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/76:10 am
PHL
- ONT
2 stops10h 00m
Southwest
Sun 5/106:25 am
ONT
- PHL
2 stops9h 00m
Southwest
Deal found 4/2![Southwest logo]()
$362
This United Airlines deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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
Tue 5/196:59 pm
ONT
- PHL
1 stop10h 01m
United Airlines
Deal found 4/2![United Airlines logo]()
$378
This Southwest deal was found by Cheapflights users on 4/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/46:10 am
PHL
- ONT
2 stops10h 00m
Southwest
Thu 5/712:40 pm
ONT
- PHL
2 stops8h 55m
Southwest
Deal found 4/4![Southwest logo]()
$369
This Delta deal was found by Cheapflights users on 4/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1212:07 pm
PHL
- ONT
1 stop9h 29m
Delta
Thu 5/145:50 pm
ONT
- PHL
1 stop8h 47m
Delta
Deal found 4/3![Delta logo]()
$341
This United Airlines deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/21:26 pm
PHL
- ONT
2 stops10h 10m
United Airlines
Sat 5/97:00 am
ONT
- PHL
1 stop7h 33m
United Airlines
Deal found 4/2![United Airlines logo]()
$380
This United Airlines deal was found by Cheapflights users on 4/5. 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 5/510:00 am
PHL
- ONT
2 stops13h 36m
United Airlines
Tue 5/196:59 pm
ONT
- PHL
2 stops12h 00m
United Airlines
Deal found 4/5![United Airlines logo]()
$384
This KAYAK deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/296:54 pm
PHL
- ONT
1 stop7h 50m
Delta
Fri 5/15:05 pm
ONT
- PHL
1 stop9h 54m
Delta
Deal found 4/2![Delta logo]()
$391
Last-minute flights from Philadelphia to OntarioDiscover last-minute flight deals from Philadelphia to Ontario. Data last updated April 7, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Ontario. Data last updated April 7, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 4/6. 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 4/228:41 pm
PHL
- ONT
1 stop13h 50m
Frontier
Tue 4/2812:59 am
ONT
- PHL
1 stop25h 35m
Frontier
Deal found 4/6![Frontier logo]()
$169
This Trip.com deal was found by Cheapflights users on 4/6. 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 4/233:41 pm
PHL
- ONT
1 stop11h 14m
Frontier
Mon 4/2712:59 am
ONT
- PHL
1 stop25h 35m
Frontier
Deal found 4/6![Frontier logo]()
$163
This Booking.com deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/233:41 pm
PHL
- ONT
1 stop11h 14m
Frontier
Sat 4/2512:59 am
ONT
- PHL
1 stop25h 35m
Frontier
Deal found 4/2![Frontier logo]()
$167
This Trip.com deal was found by Cheapflights users on 4/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/248:41 pm
PHL
- ONT
1 stop30h 14m
Frontier
Mon 4/2712:59 am
ONT
- PHL
1 stop25h 35m
Frontier
Deal found 4/3![Frontier logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 4/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/308:41 pm
PHL
- ONT
1 stop13h 50m
Frontier
Wed 5/66:00 am
ONT
- PHL
1 stop20h 37m
Frontier
Deal found 4/3![Frontier logo]()
$131
This Booking.com deal was found by Cheapflights users on 4/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/308:41 pm
PHL
- ONT
1 stop13h 50m
Frontier
Sun 5/312:59 am
ONT
- PHL
1 stop25h 35m
Frontier
Deal found 4/3![Frontier logo]()
$162
This Trip.com deal was found by Cheapflights users on 4/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/18:41 pm
PHL
- ONT
1 stop30h 14m
Frontier
Sun 5/312:59 am
ONT
- PHL
1 stop25h 35m
Frontier
Deal found 4/3![Frontier logo]()
$156
This CheapOair deal was found by Cheapflights users on 4/6. 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 5/28:41 pm
PHL
- ONT
1 stop13h 45m
Frontier
Sun 5/312:59 am
ONT
- PHL
1 stop25h 35m
Frontier
Deal found 4/6![Frontier logo]()
$171
This Kiwi.com deal was found by Cheapflights users on 4/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/48:41 pm
PHL
- ONT
1 stop16h 24m
Frontier
Mon 5/116:00 am
ONT
- PHL
1 stop20h 37m
Frontier
Deal found 4/5![Frontier logo]()
$138
This Kiwi.com deal was found by Cheapflights users on 4/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/58:35 pm
PHL
- ONT
1 stop16h 30m
Frontier
Wed 5/136:00 am
ONT
- PHL
1 stop20h 37m
Frontier
Deal found 4/3![Frontier logo]()
$124
This Expedia deal was found by Cheapflights users on 4/5. 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 5/88:35 pm
PHL
- ONT
1 stop30h 14m
Frontier
Sun 5/108:30 am
ONT
- PHL
1 stop10h 44m
Frontier
Deal found 4/5![Frontier logo]()
$160
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 7, 2026.
Search for one-way flight options from Philadelphia to Ontario. Find affordable one-way fares based on user searches. Data last updated April 7, 2026.
This Trip.com deal was found by Cheapflights users on 4/4. 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 4/298:31 pm
PHL
- ONT
1 stop14h 00m
Frontier
Deal found 4/4![Frontier logo]()
$60
This Kiwi.com deal was found by Cheapflights users on 4/6. 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 4/288:36 pm
PHL
- ONT
1 stop30h 19m
Frontier
Deal found 4/6![Frontier logo]()
$65
This Trip.com deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/58:35 pm
PHL
- ONT
1 stop30h 14m
Frontier
Deal found 4/2![Frontier logo]()
$66
This Trip.com deal was found by Cheapflights users on 4/4. 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 4/308:41 pm
PHL
- ONT
1 stop13h 50m
Frontier
Deal found 4/4![Frontier logo]()
$67
This Trip.com deal was found by Cheapflights users on 4/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/118:35 pm
PHL
- ONT
1 stop16h 30m
Frontier
Deal found 4/3![Frontier logo]()
$68
This Frontier deal was found by Cheapflights users on 4/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier 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 4/3![Frontier logo]()
$80
This Kiwi.com deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/268:35 pm
PHL
- ONT
1 stop16h 30m
Frontier
Deal found 4/6![Frontier logo]()
$81
This Super.com deal was found by Cheapflights users on 4/4. 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.
Fri 5/88:35 pm
PHL
- ONT
1 stop16h 30m
Frontier
Deal found 4/4![Frontier logo]()
$85
This Booking.com deal was found by Cheapflights users on 4/4. 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 5/2510:40 am
PHL
- ONT
1 stop24h 24m
Frontier
Deal found 4/4![Frontier logo]()
$86
This Booking.com deal was found by Cheapflights users on 4/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/78:35 pm
PHL
- ONT
1 stop16h 30m
Frontier
Deal found 4/6![Frontier logo]()
$87
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 7, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $124 (Kiwi.com) |
One-way from | $60 (Trip.com) |
Popular in | March |
Cheapest in | May |
Average price | $420 |
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 7, 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
Tue 8/11
12:02 pm-6:01 pm
1 stop8h 59m
Ontario
Sat 8/22
7:00 am-5:25 pm
1 stop7h 25m
$263
Quickest round-trip
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Sun 8/30
6:45 am-11:04 am
1 stop7h 19m
Ontario
Sat 9/5
6:00 am-5:47 pm
1 stop8h 47m
$306
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Fri 5/22
6:45 pm-11:34 pm
1 stop7h 49m
Ontario
Thu 5/28
5:50 pm-5:37 am
1 stop8h 47m
$326
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Tue 5/12
12:07 pm-6:36 pm
1 stop9h 29m
Ontario
Thu 5/14
5:50 pm-5:37 am
1 stop8h 47m
$341
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Fri 5/8
2:15 pm-9:15 pm
2 stops10h 00m
Ontario
Sun 5/10
3:00 pm-1:15 am
1 stop7h 15m
$354
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Thu 5/7
6:10 am-1:10 pm
2 stops10h 00m
Ontario
Sun 5/10
6:25 am-6:25 pm
2 stops9h 00m
$362
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Mon 5/4
6:10 am-1:10 pm
2 stops10h 00m
Ontario
Thu 5/7
12:40 pm-12:35 am
2 stops8h 55m
$369
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Sat 5/2
9:55 am-10:59 pm
2 stops16h 04m
Ontario
Mon 5/4
6:59 pm-8:00 am
1 stop10h 01m
$378
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Tue 5/12
9:55 am-10:59 pm
2 stops16h 04m
Ontario
Tue 5/19
6:59 pm-8:00 am
1 stop10h 01m
$378
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Sat 5/2
1:26 pm-8:36 pm
2 stops10h 10m
Ontario
Sat 5/9
7:00 am-5:33 pm
1 stop7h 33m
$380
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 April.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | 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 3, 2026.
The best time to book flights from Philadelphia to Ontario is 30 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, August is the cheapest month in which you can book a flight from Philadelphia to Ontario (average of $90). Flying from Philadelphia to Ontario in March is currently the most expensive (average of $163). 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 7, 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.
Crew
8.6
Food
7.0
Overall
8.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Food
7.0
Overall
8.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Food
7.0
Overall
8.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Food
7.0
Overall
8.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Food
7.0
Overall
8.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Food
7.0
Overall
8.0
Comfort
8.0
Boarding
8.1
Entertainment
7.5
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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Ontario flight routes
Other flight options
Other flights from Philadelphia
Popular flights
Alternative routes for Philadelphia to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
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 7, 2026.
Philadelphia and Ontario flights
Browse other Philadelphia and Ontario flight options. Last updated on April 7, 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 7, 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 7, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$92 | Average$293 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$208 | Average$478 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$306 | Average$457 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$374 | Average$496 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$375 | Average$483 | FlexibilityNo cancel fee | On-time69% |