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$83+ 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 4/1. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ONT
mar. 8 — mar. 151
sáb. 3/8
sáb. 3/15
1 adult, Economy
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The best prices from Philadelphia to Ontario are usually found in April or September, booked 26 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 marzo 3, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$170
(Frontier)

One-way from

$83
(Trip.com)

Popular in

December

Cheapest in

April

Average price

$396
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
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One-way flight from Philadelphia to Ontario
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($58 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in March 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 marzo 3, 2025.

This Frontier deal was found by Cheapflights users on 3/3. 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.
mié. 4/26:40 amPHL - ONT
1 stop10h 47mFrontier
mar. 4/82:43 pmONT - PHL
1 stop13h 04mFrontier
Deal found 3/3$170
This Delta deal was found by Cheapflights users on 3/3. 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.
mar. 4/225:20 amPHL - ONT
1 stop8h 37mDelta
lun. 4/2810:15 pmONT - PHL
1 stop8h 05mDelta
Deal found 3/3$331
This Orbitz deal was found by Cheapflights users on 3/2. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/26:40 amPHL - ONT
1 stop10h 47mMultiple Airlines
mar. 4/87:00 amONT - PHL
2 stops20h 00mMultiple Airlines
Deal found 3/2$339
This United Airlines deal was found by Cheapflights users on 3/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 3/1710:35 amPHL - ONT
2 stops12h 35mUnited Airlines
dom. 8/176:32 pmONT - PHL
1 stop8h 04mUnited Airlines
Deal found 3/3$404
This Southwest deal was found by Cheapflights users on 3/2. 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.
mié. 4/26:50 amPHL - ONT
2 stops9h 35mSouthwest
mar. 4/88:55 amONT - PHL
2 stops9h 25mSouthwest
Deal found 3/2$409
This Trip.com deal was found by Cheapflights users on 3/2. 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.
jue. 9/117:25 amPHL - ONT
1 stop10h 47mHawaiian Airlines
lun. 9/154:05 pmONT - PHL
1 stop10h 56mHawaiian Airlines
Deal found 3/2$411
This American Airlines deal was found by Cheapflights users on 3/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 4/171:50 pmPHL - ONT
1 stop10h 09mAmerican Airlines
dom. 4/206:00 amONT - PHL
1 stop7h 43mAmerican Airlines
Deal found 3/2$435
This Alaska Airlines deal was found by Cheapflights users on 3/2. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/17:25 amPHL - ONT
1 stop10h 47mAlaska Airlines
sáb. 10/114:05 pmONT - PHL
1 stop10h 56mAlaska Airlines
Deal found 3/2$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 marzo 3, 2025.

Fly from

Philadelphia

Fly to

Ontario

Route

Depart

Return

Price

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

mié. 4/2

6:40 am-2:27 pm

1 stop10h 47m

Ontario

mar. 4/8

2:43 pm-6:47 am

1 stop13h 04m

$170

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

mar. 4/22

5:20 am-10:57 am

1 stop8h 37m

Ontario

lun. 4/28

10:15 pm-9:20 am

1 stop8h 05m

$331

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

mié. 4/2

6:40 am-2:27 pm

1 stop10h 47m

Ontario

mar. 4/8

7:00 am-6:00 am

2 stops20h 00m

$339

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

lun. 3/17

10:35 am-8:10 pm

2 stops12h 35m

Ontario

dom. 8/17

6:32 pm-5:36 am

1 stop8h 04m

$404

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

mié. 4/2

6:50 am-1:25 pm

2 stops9h 35m

Ontario

mar. 4/8

8:55 am-9:20 pm

2 stops9h 25m

$409

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

jue. 4/17

1:50 pm-8:59 pm

1 stop10h 09m

Ontario

dom. 4/20

6:00 am-4:43 pm

1 stop7h 43m

$435

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

jue. 4/10

7:20 am-11:59 pm

1 stop19h 39m

Ontario

lun. 4/14

6:55 am-6:00 am

2 stops20h 05m

$518

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

mar. 4/1

8:31 am-5:56 pm

1 stop12h 25m

$83

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

dom. 4/27

10:08 pm-1:14 pm

1 stop18h 06m

$135

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

lun. 4/14

6:34 pm-11:41 pm

1 stop8h 07m

$166

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/2

Showing 1-10 of 14 results
1
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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 March.
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 February 28, 2025.

The best time to book flights from Philadelphia to Ontario is 26 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 $313). 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 marzo 3, 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 marzo 3, 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
4,333 reviews

Entertainment

7.6

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.1

Overall

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Southwest
8.1
Very good
4,333 reviews
Southwest
8.1
Very good
4,333 reviews

Entertainment

7.6

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.1

Overall

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Alaska Airlines
8.0
Very good
9,713 reviews
Southwest
8.1
Very good
4,333 reviews

Entertainment

7.6

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.1

Overall

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

Delta
8.0
Very good
8,070 reviews
Southwest
8.1
Very good
4,333 reviews

Entertainment

7.6

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.1

Overall

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

United Airlines
7.4
Good
8,679 reviews
Southwest
8.1
Very good
4,333 reviews

Entertainment

7.6

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.1

Overall

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,333 reviews

Entertainment

7.6

Crew

8.7

Boarding

8.2

Comfort

8.1

Food

7.1

Overall

8.1

Reviews

1 / 20

10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

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 $170 on this airline. Additional options worth looking into are Delta and American Airlines, starting at $331 and $384 round-trip. Users have found that Frontier is 54% 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 $83 on Frontier. Other airlines that offer cheap prices include Delta from $166 and United Airlines from $221 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 $313). 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 marzo 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$134Average$264FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$152Average$214FlexibilityNo cancel feeOn-time65%
DeltaCheapest$259Average$380FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$268Average$403FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$338Average$441FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$357Average$436FlexibilityNo cancel feeOn-time69%
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