$79+ Cheap flights from Pennsylvania to Ontario (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 5/13. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ONT
May 24 — May 311
Round-trip
1 adult, Economy
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Cheapest flights from Pennsylvania to OntarioExplore the most affordable flight options available from Pennsylvania to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 24, 2026.
Explore the most affordable flight options available from Pennsylvania to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 24, 2026.
This Frontier deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/91:59 pm
DCA
- ONT
1 stop12h 50m
Frontier
Tue 5/1210:50 am
ONT
- DCA
1 stop8h 08m
Frontier
Deal found 4/19![Frontier logo]()
$180
This Frontier deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/269:12 am
IAD
- ONT
1 stop9h 32m
Frontier
Wed 6/34:39 pm
ONT
- IAD
1 stop12h 33m
Frontier
Deal found 4/20![Frontier logo]()
$185
This Frontier deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/269:12 am
IAD
- ONT
1 stop9h 32m
Frontier
Mon 6/13:30 pm
ONT
- IAD
1 stop13h 42m
Frontier
Deal found 4/20![Frontier logo]()
$190
This Booking.com deal was found by Cheapflights users on 4/23. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/269:12 am
IAD
- ONT
1 stop25h 52m
Frontier
Thu 5/283:30 pm
ONT
- IAD
1 stop13h 42m
Frontier
Deal found 4/23![Frontier logo]()
$192
This Trip.com deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/67:00 am
DCA
- ONT
1 stop19h 49m
Frontier
Sun 5/106:00 am
ONT
- DCA
1 stop27h 59m
Frontier
Deal found 4/19![Frontier logo]()
$199
This CheapOair deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/47:59 am
DCA
- ONT
1 stop29h 06m
Frontier
Sat 5/96:00 am
ONT
- DCA
1 stop12h 58m
Frontier
Deal found 4/20![Frontier logo]()
$200
This Frontier deal was found by Cheapflights users on 4/23. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/156:00 pm
DCA
- ONT
1 stop8h 49m
Frontier
Tue 5/196:00 am
ONT
- DCA
1 stop12h 58m
Frontier
Deal found 4/23![Frontier logo]()
$205
This Frontier deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/269:12 am
IAD
- ONT
1 stop9h 32m
Frontier
Fri 6/53:30 pm
ONT
- IAD
1 stop13h 42m
Frontier
Deal found 4/20![Frontier logo]()
$205
This Booking.com deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/131:59 pm
DCA
- ONT
1 stop12h 50m
Frontier
Sat 5/166:00 am
ONT
- DCA
1 stop27h 59m
Frontier
Deal found 4/19![Frontier logo]()
$207
This CheapOair deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/76:00 pm
DCA
- ONT
1 stop19h 05m
Frontier
Sun 5/1010:50 am
ONT
- DCA
1 stop23h 09m
Frontier
Deal found 4/20![Frontier logo]()
$210
This Frontier deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/109:55 am
IAD
- ONT
1 stop8h 13m
Frontier
Wed 7/83:34 pm
ONT
- IAD
1 stop13h 16m
Frontier
Deal found 4/20![Frontier logo]()
$210
This Frontier deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/76:00 pm
DCA
- ONT
1 stop8h 49m
Frontier
Tue 5/126:00 am
ONT
- DCA
1 stop12h 58m
Frontier
Deal found 4/19![Frontier logo]()
$211
Best flights from Pennsylvania to OntarioDiscover carefully curated flight deals from Pennsylvania to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 24, 2026.
Discover carefully curated flight deals from Pennsylvania to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 24, 2026.
This United Airlines deal was found by Cheapflights users on 4/22. 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 6/22:55 pm
DCA
- ONT
1 stop10h 00m
United Airlines
Tue 6/96:30 am
ONT
- DCA
1 stop8h 42m
United Airlines
Deal found 4/22![United Airlines logo]()
$253
This Delta deal was found by Cheapflights users on 4/22. 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 5/132:45 pm
DCA
- ONT
2 stops11h 49m
Delta
Mon 5/1810:00 pm
ONT
- DCA
1 stop8h 11m
Delta
Deal found 4/22![Delta logo]()
$262
This JetBlue deal was found by Cheapflights users on 4/23. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/35:30 pm
JFK
- ONT
Nonstop6h 17m
JetBlue
Tue 6/910:41 pm
ONT
- JFK
Nonstop5h 29m
JetBlue
Deal found 4/23![JetBlue logo]()
$322
This Alaska Airlines deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/47:00 am
JFK
- ONT
1 stop10h 32m
Alaska Airlines
Wed 5/610:39 am
ONT
- JFK
1 stop9h 20m
Alaska Airlines
Deal found 4/19![Alaska Airlines logo]()
$335
This Southwest deal was found by Cheapflights users on 4/22. 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 6/94:35 pm
DCA
- ONT
2 stops8h 40m
Southwest
Tue 6/168:25 pm
ONT
- DCA
2 stops9h 00m
Southwest
Deal found 4/22![Southwest logo]()
$339
This Delta deal was found by Cheapflights users on 4/22. 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 6/25:21 pm
IAD
- ONT
2 stops9h 13m
Delta
Tue 6/911:57 am
ONT
- IAD
1 stop9h 28m
Delta
Deal found 4/22![Delta logo]()
$262
This American Airlines deal was found by Cheapflights users on 4/22. 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 6/36:05 am
SCE
- ONT
2 stops15h 17m
American Airlines
Sat 8/1512:59 pm
ONT
- SCE
2 stops17h 39m
American Airlines
Deal found 4/22![American Airlines logo]()
$596
This Delta deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/134:45 pm
LGA
- ONT
2 stops9h 49m
Delta
Tue 5/1910:00 pm
ONT
- LGA
2 stops11h 14m
Delta
Deal found 4/19![Delta logo]()
$292
This JetBlue deal was found by Cheapflights users on 4/22. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/136:52 pm
JFK
- ONT
Nonstop6h 09m
JetBlue
Mon 6/2211:54 pm
ONT
- JFK
Nonstop5h 24m
JetBlue
Deal found 4/22![JetBlue logo]()
$322
This United Airlines deal was found by Cheapflights users on 4/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/226:00 am
PHL
- ONT
1 stop9h 12m
United Airlines
Sat 8/297:00 am
ONT
- PHL
1 stop9h 19m
United Airlines
Deal found 4/23![United Airlines logo]()
$334
This Alaska Airlines deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/267:00 am
IAD
- ONT
1 stop10h 18m
Alaska Airlines
Wed 9/303:12 pm
ONT
- IAD
1 stop11h 28m
Alaska Airlines
Deal found 4/21![Alaska Airlines logo]()
$341
This Southwest deal was found by Cheapflights users on 4/23. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/127:25 am
LGA
- ONT
1 stop8h 50m
Southwest
Fri 5/1512:50 pm
ONT
- LGA
1 stop7h 00m
Southwest
Deal found 4/23![Southwest logo]()
$353
This Delta deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/46:40 pm
PHL
- ONT
1 stop8h 04m
Delta
Tue 9/85:55 pm
ONT
- PHL
1 stop9h 10m
Delta
Deal found 4/21![Delta logo]()
$303
This JetBlue deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/156:44 pm
JFK
- ONT
Nonstop6h 26m
JetBlue
Wed 5/2710:41 pm
ONT
- JFK
Nonstop5h 29m
JetBlue
Deal found 4/19![JetBlue logo]()
$339
This United Airlines deal was found by Cheapflights users on 4/22. 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 8/206:00 am
PHL
- ONT
1 stop9h 12m
United Airlines
Mon 8/247:13 pm
ONT
- PHL
2 stops11h 30m
United Airlines
Deal found 4/22![United Airlines logo]()
$344
This Alaska Airlines deal was found by Cheapflights users on 4/23. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/127:10 am
IAD
- ONT
1 stop10h 22m
Alaska Airlines
Thu 5/287:41 pm
ONT
- IAD
1 stop8h 53m
Alaska Airlines
Deal found 4/23![Alaska Airlines logo]()
$362
This Delta deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/76:40 pm
PHL
- ONT
1 stop8h 08m
Delta
Sun 10/115:05 pm
ONT
- PHL
1 stop9h 36m
Delta
Deal found 4/19![Delta logo]()
$306
This JetBlue deal was found by Cheapflights users on 4/23. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/307:33 pm
JFK
- ONT
Nonstop6h 06m
JetBlue
Tue 7/711:50 pm
ONT
- JFK
Nonstop5h 21m
JetBlue
Deal found 4/23![JetBlue logo]()
$347
This United Airlines deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/247:29 am
LGA
- ONT
1 stop8h 12m
United Airlines
Tue 9/297:00 am
ONT
- LGA
1 stop8h 11m
United Airlines
Deal found 4/21![United Airlines logo]()
$349
This Delta deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/245:16 am
PHL
- ONT
1 stop8h 22m
Delta
Thu 8/611:48 am
ONT
- PHL
1 stop8h 07m
Delta
Deal found 4/19![Delta logo]()
$306
This Alaska Airlines deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/217:00 am
IAD
- ONT
1 stop10h 47m
Alaska Airlines
Sun 10/256:58 pm
ONT
- IAD
1 stop9h 30m
Alaska Airlines
Deal found 4/19![Alaska Airlines logo]()
$371
This JetBlue deal was found by Cheapflights users on 4/23. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/177:33 pm
JFK
- ONT
Nonstop6h 06m
JetBlue
Tue 6/2311:54 pm
ONT
- JFK
Nonstop5h 24m
JetBlue
Deal found 4/23![JetBlue logo]()
$347
This Southwest deal was found by Cheapflights users on 4/24. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/165:15 am
PHL
- ONT
2 stops9h 15m
Southwest
Sat 6/2010:00 am
ONT
- PHL
2 stops11h 05m
Southwest
Deal found 4/24![Southwest logo]()
$430
This United Airlines deal was found by Cheapflights users on 4/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/111:00 pm
DCA
- ONT
1 stop8h 19m
United Airlines
Sat 8/225:45 am
ONT
- DCA
1 stop7h 10m
United Airlines
Deal found 4/23![United Airlines logo]()
$363
This Delta deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/41:59 pm
LGA
- ONT
1 stop10h 01m
Delta
Thu 5/79:50 am
ONT
- LGA
2 stops10h 35m
Delta
Deal found 4/20![Delta logo]()
$310
This JetBlue deal was found by Cheapflights users on 4/23. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/307:33 pm
JFK
- ONT
Nonstop6h 06m
JetBlue
Wed 7/811:50 pm
ONT
- JFK
Nonstop5h 21m
JetBlue
Deal found 4/23![JetBlue logo]()
$347
This Alaska Airlines deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/295:08 pm
EWR
- ONT
1 stop9h 48m
Alaska Airlines
Tue 6/24:03 pm
ONT
- EWR
1 stop11h 49m
Alaska Airlines
Deal found 4/21![Alaska Airlines logo]()
$389
This United Airlines deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/2910:32 am
PHL
- ONT
2 stops13h 10m
United Airlines
Mon 6/16:30 pm
ONT
- PHL
2 stops12h 15m
United Airlines
Deal found 4/20![United Airlines logo]()
$384
This Delta deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/82:59 pm
LGA
- ONT
1 stop9h 49m
Delta
Tue 5/1910:00 pm
ONT
- LGA
1 stop7h 14m
Delta
Deal found 4/20![Delta logo]()
$320
This Alaska Airlines deal was found by Cheapflights users on 4/24. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/197:00 am
PIT
- ONT
1 stop11h 09m
Alaska Airlines
Wed 5/204:03 pm
ONT
- PIT
1 stop10h 37m
Alaska Airlines
Deal found 4/24![Alaska Airlines logo]()
$399
Last-minute flights from Pennsylvania to OntarioDiscover last-minute flight deals from Pennsylvania to Ontario. Data last updated April 24, 2026 and is based on user searches.
Discover last-minute flight deals from Pennsylvania to Ontario. Data last updated April 24, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/47:59 am
DCA
- ONT
1 stop29h 06m
Frontier
Sat 5/96:00 am
ONT
- DCA
1 stop12h 58m
Frontier
Deal found 4/20![Frontier logo]()
$200
This Trip.com deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/67:00 am
DCA
- ONT
1 stop19h 49m
Frontier
Sun 5/106:00 am
ONT
- DCA
1 stop27h 59m
Frontier
Deal found 4/19![Frontier logo]()
$199
This CheapOair deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/76:00 pm
DCA
- ONT
1 stop19h 05m
Frontier
Sun 5/1010:50 am
ONT
- DCA
1 stop23h 09m
Frontier
Deal found 4/20![Frontier logo]()
$210
This Frontier deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/76:00 pm
DCA
- ONT
1 stop8h 49m
Frontier
Tue 5/126:00 am
ONT
- DCA
1 stop12h 58m
Frontier
Deal found 4/19![Frontier logo]()
$211
This Expedia deal was found by Cheapflights users on 4/23. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/712:36 pm
IAD
- ONT
1 stop9h 35m
Frontier
Wed 5/204:39 pm
ONT
- IAD
1 stop12h 33m
Frontier
Deal found 4/23![Frontier logo]()
$211
This Frontier deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/91:59 pm
DCA
- ONT
1 stop12h 50m
Frontier
Tue 5/1210:50 am
ONT
- DCA
1 stop8h 08m
Frontier
Deal found 4/19![Frontier logo]()
$180
This Booking.com deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/131:59 pm
DCA
- ONT
1 stop12h 50m
Frontier
Sat 5/166:00 am
ONT
- DCA
1 stop27h 59m
Frontier
Deal found 4/19![Frontier logo]()
$207
This Frontier deal was found by Cheapflights users on 4/23. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/156:00 pm
DCA
- ONT
1 stop8h 49m
Frontier
Tue 5/196:00 am
ONT
- DCA
1 stop12h 58m
Frontier
Deal found 4/23![Frontier logo]()
$205
This Frontier deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/269:12 am
IAD
- ONT
1 stop9h 32m
Frontier
Tue 6/24:39 pm
ONT
- IAD
1 stop12h 33m
Frontier
Deal found 4/20![Frontier logo]()
$185
This Frontier deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/269:12 am
IAD
- ONT
1 stop9h 32m
Frontier
Mon 6/13:30 pm
ONT
- IAD
1 stop13h 42m
Frontier
Deal found 4/20![Frontier logo]()
$190
This Booking.com deal was found by Cheapflights users on 4/23. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/269:12 am
IAD
- ONT
1 stop25h 52m
Frontier
Thu 5/283:30 pm
ONT
- IAD
1 stop13h 42m
Frontier
Deal found 4/23![Frontier logo]()
$192
This Frontier deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/269:12 am
IAD
- ONT
1 stop9h 32m
Frontier
Fri 6/53:30 pm
ONT
- IAD
1 stop13h 42m
Frontier
Deal found 4/20![Frontier logo]()
$205
One-way flights from Pennsylvania to OntarioSearch for one-way flight options from Pennsylvania to Ontario. Find affordable one-way fares based on user searches. Data last updated April 24, 2026.
Search for one-way flight options from Pennsylvania to Ontario. Find affordable one-way fares based on user searches. Data last updated April 24, 2026.
This Super.com deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/1312:17 pm
PHL
- ONT
1 stop9h 54m
Frontier
Deal found 4/19![Frontier logo]()
$79
This Booking.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/2610:40 am
PHL
- ONT
1 stop8h 04m
Frontier
Deal found 4/20![Frontier logo]()
$80
This Frontier deal was found by Cheapflights users on 4/22. 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 5/131:30 pm
EWR
- ONT
1 stop8h 41m
Frontier
Deal found 4/22![Frontier logo]()
$80
This Frontier deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/269:12 am
IAD
- ONT
1 stop9h 32m
Frontier
Deal found 4/21![Frontier logo]()
$80
This Trip.com deal was found by Cheapflights users on 4/22. 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 5/121:30 pm
EWR
- ONT
1 stop8h 41m
Frontier
Deal found 4/22![Frontier logo]()
$84
This Super.com deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/237:00 am
PHL
- ONT
1 stop27h 08m
Frontier
Deal found 4/21![Frontier logo]()
$85
This CheapOair deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/128:35 pm
PHL
- ONT
1 stop30h 14m
Frontier
Deal found 4/21![Frontier logo]()
$86
This Booking.com deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/236:00 pm
DCA
- ONT
1 stop19h 05m
Frontier
Deal found 4/21![Frontier logo]()
$86
This Booking.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/259:12 am
IAD
- ONT
1 stop25h 52m
Frontier
Deal found 4/20![Frontier logo]()
$86
This American Airlines deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/125:00 am
PHL
- ONT
2 stops9h 34m
American Airlines
Deal found 4/20![American Airlines logo]()
$94
This Super.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/96:00 pm
DCA
- ONT
1 stop8h 49m
Frontier
Deal found 4/20![Frontier logo]()
$99
This Frontier deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/612:17 pm
PHL
- ONT
1 stop9h 54m
Frontier
Deal found 4/21![Frontier logo]()
$100
Find flight deals from Pennsylvania to Ontario
Keep the following information in mind while searching for Pennsylvania to Ontario flight deals. Data was last updated April 24, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $180 (Frontier) |
One-way from | $79 (Super.com) |
Popular in | December |
Cheapest in | July |
Average price | $473 |
Cheapflights Fare Finder
Customize your flight search to find flights from Pennsylvania 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 24, 2026.
Use the filters below to find and compare flights from Pennsylvania to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Washington, D.C.Ontario
DCA - ONT
DCAONT
Washington, D.C. Reagan-National
Tue 6/2
2:55 pm-9:55 pm
1 stop10h 00m
Ontario
Tue 6/9
6:30 am-6:12 pm
1 stop8h 42m
$253
Washington, D.C.Ontario
DCA - ONT
DCAONT
Washington, D.C. Reagan-National
Wed 5/13
2:45 pm-11:34 pm
2 stops11h 49m
Ontario
Mon 5/18
10:00 pm-9:11 am
1 stop8h 11m
$262
Washington, D.C.Ontario
IAD - ONT
IADONT
Washington, D.C. Dulles Intl
Tue 6/2
5:21 pm-11:34 pm
2 stops9h 13m
Ontario
Tue 6/9
11:57 am-12:25 am
1 stop9h 28m
$262
New YorkOntario
LGA - ONT
LGAONT
New York LaGuardia
Wed 5/13
4:45 pm-11:34 pm
2 stops9h 49m
Ontario
Tue 5/19
10:00 pm-12:14 pm
2 stops11h 14m
$292
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Fri 9/4
6:40 pm-11:44 pm
1 stop8h 04m
Ontario
Tue 9/8
5:55 pm-6:05 am
1 stop9h 10m
$303
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Wed 10/7
6:40 pm-11:48 pm
1 stop8h 08m
Ontario
Sun 10/11
5:05 pm-5:41 am
1 stop9h 36m
$306
PhiladelphiaOntario
PHL - ONT
PHLONT
Philadelphia
Fri 7/24
5:16 am-10:38 am
1 stop8h 22m
Ontario
Thu 8/6
11:48 am-10:55 pm
1 stop8h 07m
$306
New YorkOntario
LGA - ONT
LGAONT
New York LaGuardia
Mon 5/4
1:59 pm-9:00 pm
1 stop10h 01m
Ontario
Thu 5/7
9:50 am-11:25 pm
2 stops10h 35m
$310
New YorkOntario
LGA - ONT
LGAONT
New York LaGuardia
Fri 5/8
2:59 pm-9:48 pm
1 stop9h 49m
Ontario
Tue 5/19
10:00 pm-8:14 am
1 stop7h 14m
$320
New YorkOntario
JFK - ONT
JFKONT
New York John F Kennedy Intl
Wed 6/3
5:30 pm-8:47 pm
Nonstop6h 17m
Ontario
Tue 6/9
10:41 pm-7:10 am
Nonstop5h 29m
$322
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Pennsylvania to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Pennsylvania with our price prediction graph.
IAD-ONT
DCA-ONT
PHL-ONT
JFK-ONT
LGA-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 Pennsylvania to Ontario
USPA-ONT
IAD-ONT
DCA-ONT
PHL-ONT
JFK-ONT
How far ahead should I book a flight from Pennsylvania to Ontario?
To ensure you get the cheapest price possible for a flight from Pennsylvania to Ontario, you should look to book at least 27 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from Pennsylvania to Ontario?
Currently, May is the cheapest month in which you can book a flight from Pennsylvania to Ontario (average of $80). Flying from Pennsylvania to Ontario in March is currently the most expensive (average of $341). 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 Pennsylvania to Ontario?
Related info for your journey
Find useful and relevant information for your journey from Pennsylvania 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
Popular flights
Top destinations
Alternative routes for Pennsylvania 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 Pennsylvania to Ontario by cabin class
Find flights from Pennsylvania 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 24, 2026.
Pennsylvania and Ontario flights
Browse other Pennsylvania and Ontario flight options. Last updated on April 24, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Pennsylvania to Ontario flights
Consider these flights traveling from Pennsylvania to Ontario.
Top 5 airlines flying from Pennsylvania to Ontario
Discover the top 5 airlines that operate flights from Pennsylvania 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 24, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$155 | Average$322 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$208 | Average$468 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$286 | Average$419 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$296 | Average$480 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$350 | Average$497 | FlexibilityNo cancel fee | On-time63% |