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$65+ 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 2/26. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ONT
feb. 4 — feb. 111
mar. 2/4
mar. 2/11
1 adult, Economy
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The best prices from Philadelphia to Ontario are usually found in April or September, booked 87 days in advance, depart on a Monday or Wednesday and return on a Tuesday

Cheap 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 enero 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$130
(Frontier)

One-way from

$65
(Mytrip)

Popular in

December

Cheapest in

April

Average price

$415
Provider with most accurate pricing for Philadelphia-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Philadelphia-Ontario flights.
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From Philadelphia to Ontario
Search Deals
One-way flight from Philadelphia to Ontario
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($56 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in January 2025
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Find flight deals from Philadelphia to Ontario

Cheapest flights from Philadelphia to Ontario
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 enero 30, 2025.

This Frontier deal was found by Cheapflights users on 1/30. 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.
mié. 3/57:45 amPHL - ONT
1 stop10h 34mFrontier
mié. 3/122:43 pmONT - PHL
1 stop12h 31mFrontier
Deal found 1/30$130
This Delta deal was found by Cheapflights users on 1/30. 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.
mar. 3/43:55 pmPHL - ONT
1 stop9h 57mDelta
mié. 3/1212:46 pmONT - PHL
1 stop7h 07mDelta
Deal found 1/30$343
This United Airlines deal was found by Cheapflights users on 1/29. 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.
lun. 3/310:10 amPHL - ONT
2 stops13h 42mUnited Airlines
mié. 3/121:40 pmONT - PHL
1 stop6h 36mUnited Airlines
Deal found 1/29$348
This American Airlines deal was found by Cheapflights users on 1/29. 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.
sáb. 2/154:00 pmPHL - ONT
1 stop9h 16mAmerican Airlines
sáb. 2/2210:50 pmONT - PHL
1 stop7h 50mAmerican Airlines
Deal found 1/29$370
This Southwest deal was found by Cheapflights users on 1/30. 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.
vie. 4/44:40 pmPHL - ONT
2 stops9h 40mSouthwest
vie. 4/115:35 amONT - PHL
1 stop7h 10mSouthwest
Deal found 1/30$398
This Kissandfly.com deal was found by Cheapflights users on 1/29. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 2/1510:40 amPHL - ONT
3 stops23h 46mMultiple Airlines
sáb. 2/228:29 pmONT - PHL
1 stop14h 03mMultiple Airlines
Deal found 1/29$403
This Alaska Airlines deal was found by Cheapflights users on 1/28. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/27:25 amPHL - ONT
1 stop10h 47mAlaska Airlines
sáb. 9/64:05 pmONT - PHL
1 stop10h 56mAlaska Airlines
Deal found 1/28$476

Find flights from Philadelphia to Ontario within your budget

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 enero 30, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

mié. 3/5

7:45 am-3:19 pm

1 stop10h 34m

Ontario

mié. 3/12

2:43 pm-6:14 am

1 stop12h 31m

$130

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

mar. 3/4

3:55 pm-10:52 pm

1 stop9h 57m

Ontario

mié. 3/12

12:46 pm-10:53 pm

1 stop7h 07m

$343

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

mié. 3/5

8:30 am-2:29 pm

1 stop8h 59m

Ontario

mié. 3/12

6:45 pm-9:51 am

2 stops12h 06m

$348

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

sáb. 2/15

11:50 am-6:26 pm

2 stops9h 36m

Ontario

mié. 2/19

6:59 am-5:23 pm

1 stop7h 24m

$388

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

mié. 4/9

5:25 am-12:20 pm

2 stops9h 55m

Ontario

sáb. 4/12

5:40 am-5:30 pm

2 stops8h 50m

$390

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

lun. 2/24

6:25 pm-9:27 pm

1 stop30h 02m

Ontario

mié. 2/26

11:45 am-5:25 pm

2 stops26h 40m

$493

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

vie. 5/2

6:53 pm-9:16 am

2 stops17h 23m

Ontario

jue. 5/8

12:59 am-5:37 pm

1 stop13h 38m

$584

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

mié. 2/26

7:45 am-3:19 pm

1 stop10h 34m

$65

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

jue. 3/13

6:00 am-11:36 am

1 stop8h 36m

$172

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

mié. 3/12

12:41 pm-10:45 pm

2 stops13h 04m

$227

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/30

Showing 1-10 of 13 results
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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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • 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.
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.

Travel insights for flights from Philadelphia to Ontario

Get recent, data-driven insights about flights from Philadelphia to Ontario including ideal travel times, pricing trends, and more.

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 January 24, 2025.

The best time to book flights from Philadelphia to Ontario is 87 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 $246). Flying from Philadelphia to Ontario in March is currently the most expensive (average of $310). 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.

What is the cheapest time of day to fly from PHL to ONT?

Find hourly flight availability from Philadelphia to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated enero 30, 2025.

It’s typically best to fly out from Philadelphia to Ontario in the evening. Doing so could potentially save you 25% on the flight price compared to flying in the afternoon, which is usually more expensive.

What is the cheapest day to fly from Philadelphia to Ontario?

Use this chart to determine the cheapest time to fly round-trip from Philadelphia to Ontario. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Philadelphia to Ontario flight should consider departing on Sunday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 enero 30, 2025.
Peruse reviews from past customers who have flown with Southwest, Alaska Airlines and Delta from Philadelphia to Ontario to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,585 reviews

Food

7.1

Entertainment

7.7

Overall

8.1

Boarding

8.2

Crew

8.7

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Southwest
8.1
Very good
4,585 reviews
Southwest
8.1
Very good
4,585 reviews

Food

7.1

Entertainment

7.7

Overall

8.1

Boarding

8.2

Crew

8.7

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Alaska Airlines
8.0
Very good
9,688 reviews
Southwest
8.1
Very good
4,585 reviews

Food

7.1

Entertainment

7.7

Overall

8.1

Boarding

8.2

Crew

8.7

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

Delta
8.0
Very good
8,454 reviews
Southwest
8.1
Very good
4,585 reviews

Food

7.1

Entertainment

7.7

Overall

8.1

Boarding

8.2

Crew

8.7

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

United Airlines
7.4
Good
8,913 reviews
Southwest
8.1
Very good
4,585 reviews

Food

7.1

Entertainment

7.7

Overall

8.1

Boarding

8.2

Crew

8.7

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,585 reviews

Food

7.1

Entertainment

7.7

Overall

8.1

Boarding

8.2

Crew

8.7

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Christine,Aug 2024

DEN - LGB

No issues. I needed pre boarding and I was able to get it without issue

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.

  • What are the cheapest airlines flying from Philadelphia to Ontario round-trip?

    Our cheapest airline available from Philadelphia to Ontario is Frontier. Our recent data shows that you can find tickets from as low as $130 on this airline. Additional options worth looking into are Delta and United Airlines, starting at $343 and $348 round-trip. Users have found that Frontier is 64% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Philadelphia to Ontario one-way?

    One-way options have recently been found by users for as low as $65 on Frontier. Other airlines that offer cheap prices include Delta from $172 and United Airlines from $227 one-way.

  • Can I find deals for flights from Philadelphia to Ontario that include hotel bookings?

    Yes. In addition to deals on Philadelphia to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Philadelphia to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Ontario.

  • Can I find deals for business class flights from Philadelphia to Ontario?

    Yes. Cheapflights offers flight deals from Philadelphia to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • 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 $246). Flying from Philadelphia to Ontario in March is currently the most expensive (average of $310). 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.

See more FAQs

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Alternative routes for Philadelphia to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Philadelphia to Ontario

Discover the top 6 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 enero 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$138Average$264FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$152Average$218FlexibilityNo cancel feeOn-time65%
DeltaCheapest$259Average$381FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$268Average$400FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$338Average$457FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$357Average$409FlexibilityNo cancel feeOn-time69%
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