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PHL - ONT

$75 Find cheap flights from Philadelphia to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Philadelphia to Ontario departing on 5/11. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Sat 5/25
Sat 6/1

Search hundreds of travel sites at once for deals on flights to Ontario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Ontario, as well as popular online travel agencies
In the last 7 days travelers have searched 45,119,101 times on KAYAK, and here is why:

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Cheap flight deals from Philadelphia to Ontario (PHL-ONT)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Philadelphia to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
8:27 pm - 7:34 amPHL-ONT
14h 07m1 stop
2:25 pm - 12:10 pmONT-PHL
18h 45m1 stop
$99Frontier
Find Deal
Fri, May 17 - Tue, May 21
8:50 pm - 6:26 amPHL-ONT
12h 36m1 stop
7:26 am - 5:24 amONT-PHL
18h 58m1 stop
$115Frontier
Find Deal
Mon, May 13 - Wed, May 15
8:50 pm - 6:26 amPHL-ONT
12h 36m1 stop
7:26 am - 5:24 amONT-PHL
18h 58m1 stop
$116Frontier
Find Deal
Mon, May 13 - Wed, May 15
8:40 pm - 11:56 pmPHL-ONT
30h 16m1 stop
7:26 am - 5:24 amONT-PHL
18h 58m1 stop
$119Frontier
Find Deal
Wed, May 8 - Wed, May 15
8:40 pm - 6:31 amPHL-ONT
12h 51m1 stop
5:41 pm - 5:05 amONT-PHL
8h 24m1 stop
$124Frontier
Find Deal
Sat, May 11 - Sat, May 18
8:40 pm - 6:26 amPHL-ONT
12h 46m1 stop
2:25 pm - 12:10 pmONT-PHL
18h 45m1 stop
$128Frontier
Find Deal
Sun, May 12 - Tue, May 21
3:46 pm - 10:29 pmPHL-ONT
9h 43m1 stop
10:29 pm - 10:36 amONT-PHL
9h 07m1 stop
$268American Airlines
Find Deal
Fri, May 10 - Mon, May 13
7:05 am - 12:13 pmPHL-ONT
8h 08m1 stop
6:42 pm - 10:35 amONT-PHL
12h 53m2 stops
$275Delta
Find Deal
Fri, May 10 - Mon, May 13
7:00 pm - 12:27 amPHL-ONT
8h 27m1 stop
7:40 pm - 6:25 amONT-PHL
7h 45m1 stop
$324American Airlines
Find Deal
Thu, May 23 - Sun, May 26
7:05 am - 12:13 pmPHL-ONT
8h 08m1 stop
12:50 pm - 12:53 amONT-PHL
9h 03m1 stop
$334Delta
Find Deal
Tue, May 7 - Tue, May 21

Flights from Philadelphia to Ontario - Travel Insights & Trends

Get data-powered insights and trends into flights from Philadelphia to Ontario to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Philadelphia to Ontario?

The average price of all flights from Philadelphia to Ontario clicked on KAYAK for each day over the last 12 months.
If you are looking for a flight deal from Philadelphia to Ontario, look for departures on Wednesdays and avoid leaving on a Tuesday, as it's usually the priciest day. When flying back from Ontario, Tuesday is the cheapest day to fly and Wednesday is the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Philadelphia to Ontario, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Philadelphia to Ontario is May, where tickets cost $288 on average. On the other hand, the most expensive months are June and July, where the average cost of tickets is $481 and $481 respectively.

How far in advance should I book a flight from Philadelphia to Ontario?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Philadelphia to Ontario, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Philadelphia to Ontario, you should book around 1 day before departure. For the absolute cheapest price, our data suggests you should book 7 days before departure.

Which airlines provide the cheapest flights from Philadelphia to Ontario?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the best return deals on flights connecting Philadelphia to Ontario were found on Frontier ($99) and American Airlines ($268). Frontier proposed the cheapest one-way flight at $75.

Good to know

Low season

February

High season

May

Cheapest flight

$75
Best time to beat the crowds but there is an average 3% increase in price.
Most popular time to fly and prices are also 28% lower on average.
Flight from Philadelphia to Ontario

When to book flights from Philadelphia to Ontario

Are your dates flexible? Find out the best times to travel from Philadelphia to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Philadelphia to Ontario

  • What is the cheapest flight from Philadelphia to Ontario?

    In the last 3 days, the lowest price for a flight from Philadelphia to Ontario was $75 for a one-way ticket and $99 for a round-trip.

  • Do I need a passport to fly between Philadelphia and Ontario?

    A passport is not required to fly from Philadelphia to Ontario.

  • Which aircraft models fly most regularly from Philadelphia to Ontario?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Philadelphia to Ontario?

    SkyTeam, Star Alliance, and oneworld are the airline alliances operating flights between Philadelphia and Ontario, with oneworld being the most commonly used for this route.

  • What is the most popular layover when flying to Ontario from Philadelphia?

    Phoenix is the most popular layover city among KAYAK users traveling from Philadelphia to Ontario.

  • Which is the best airline for flights from Philadelphia to Ontario, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Philadelphia to Ontario are Delta and United Airlines. With an average price for the route of $475 and an overall rating of 8.0, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $692 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Philadelphia to Ontario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Philadelphia to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Philadelphia to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Philadelphia is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Philadelphia to Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to Philadelphia with another airline. Booking your flights between Philadelphia and ONT can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Philadelphia to Ontario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from Philadelphia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top 5 airlines serving from Philadelphia to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Philadelphia to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Philadelphia to Ontario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
DeltaOverall score based on 11004 reviews
8.2boarding
7.9comfort
8.0entertainment
8.6crew
7.5food
Airline reviews

There was a loud squeaky sound the whole time we were flying.

6.0 GoodEliza, Apr 2024SAN - LAX
Read more about Delta reviews

There was a loud squeaky sound the whole time we were flying.

Had a broken tray in business class. Crew just shrugged it off.

I didn’t like that I could not select my seat and was assigned a seat when I checked in at LAX

Great experience overall. Check in at Austin was congested as they only have about 6 check in kiosks, one was broken, and there was a lot of Spring Break travelers.

Bag drop off was slow and annoying. Only 2 agents at the entire delta desk, and no one directing traffic for what line to be in, many confused people slowed down the process. Boarding was fine. Seats in Delta comfort plus were fine. Snacks were great! Definitely a bonus. The entertainment system was awful — old, slow, not responsive, and completely unable to play games due to some kind of error. But on the other hand, thank you to Delta for the free WiFi. That made it better.

Everything was very good other than I had selected a specific seat when I booked the flight and they changed it once I checked-in the day before my flight. I was still in first class but lost my aisle seat for a window seat. Being tall, the aisle offers more comfort so I always select an aisle seat.

Flight diverted in SD. Later take off in Seattle by 1.3hrs

Crew was not friendly when I went to request a seat change.

Really impressive staff at airport and on plane, especially given how busy it was

Was a great smooth flight from Detroit to San Diego.

delay several times and wait extra long to board. no entertainment service because there are problem for some rows. always encounter some delays for the last flight of the day.

On time every leg of the journey and exceptional staff at counter, gate, and on board. I haven’t travelled in US for a long time and was genuinely surprised how pleasant this was.

This was a Lufthansa flight. Disappointing main meal. Very rough over Canada and arrival at FRA. IFE was almost unusable.

Too many fees (but that seems to apply to all airlines nowadays)

For a 22 minute flight all you expect is for it to be safe and comfortable

I was not able to buy food in the flight. They refer to include your Credit card in the APP, and if you are not from USA (i have a credit card form Canada) it is not possible

Over two hours wait to get wheelchair assistance from arrival to the departure gate for LA was unreasonable even though there appreared to be heavy demand.

Airline did not explain reasons why flight was delayed two hours. Explanations were badly needed and rarely provided. Problem seemed to clearly be the airline’s fault and not the fault of the weather or airport.

I was delighted that we were able to get on the 4:40 pm flight rather than our original booking at 6:55 pm!! Other than that, the flight was comfortable and landed early😊

The flight and crew were fine. The entertainment- the sound was so bad through the headphones I could barely understand it and it was a show I had seen before. The food might have been fine but having to have an account with united in order to access the app in order to pay for the food was rage inducing. I had entered my credit card info at home and logged in as guest but that wouldn’t allow the “wallet” tab to open in the app. And then the wifi was so bad that it took about 45 minutes to fully log in and get all the info working at which time I missed the food. You shouldn’t have to give your address, email and phone number in order to get a hamburger.

Same basket of unhealthy prepackaged snacks (junk food) which was depleted by the time it got to my row!!

We experience delays on departure and connecting flights resulting in 14 hour to our next departure. We were accommodated with a night's stay but was only provided a 12 dollar meals accommodation. The airlines rules state.at least 50 dollars. In any case, it can not make up for the whole day missed on our vacation in Sydney Australia.

Flight from PHL to PHX arrived 50 minutes early and a gate was available. First class flight attendant Stephanie was very friendly and polite. Sanitizing wipes should be provided with meals in addition to refresher towels.

flight delayed so missed connection and this had to rebook for next day

Flight departed PHL one hour late due to late arrival of aircraft. On board services were okay. First class menu does not offer any new items; same desserts (cheese & crackers or Mango sorbet). At least there were no credit card promotions during the flight.

After sitting on plane for 7+ hours, flight was canceled. And to makes matters worse, my suitcase is in baggage hell!

Terrible Ticketing and Check in process. I learned that AA unilaterally cancelled my premium seating from PHL to CLT and from CLT to JAN. They did, however, refund my money, but my seating was subsequently severely downgraded. They didn’t have a seat for my unless I paid for it! Not cool! Consequently, Check-in took 45 min. AA is usually great, but this was my worst experience with AA ever. Appalling they they arbitrarily cancel my seats threatening loss of flight if I didn’t pay for a seat!!!! -John

We liked quick boarding and on time departure. Seats were very uncomfortable.

Great flight. Quick boarding and departure. No problems. Flight crew were very friendly and professional.

heat was on full blast. It was like the Tropics inside the plan.

They charged me 212.00 for a heavy check in bag at the gate. The pricing and process was so confusing - as if it was designed to purposefully gouge customers who need to board plane. That experience combined with the outrageous price charged will prevent me from ever flying Spirit again. And I’ll be sure to tell the story to anyone who cares to hear.

First....my trip was from Ft. Myers to Philly (not the other way around). Plane was clean, staff was friendly and flight was efficient with boarding and flight time. Thumbs up all around.

Seats are very small and extremely hard. Too close together. The person next to me had average shoulders and was very far into my 'space'.

Flights are great except for the ticketing service on the terminal.. Too little employees taking care for lots of flights.

The text told me it was changed to Terminal E and Gate D5. But with no one on site to ask questions there was confusion on where to go as all the gates were E's. Then we took the skyline to the D area. We left to get something to eat. No announcement was made but my daughter happened to asked and they told her our gate was moved to D12. I will not fly Spirit again.

The agent at the check in desk was absolutely rude. The rest of the team after that was good, but the check in process at LAS was miserable. The woman at the desk spoke like we were stupid and was rude throughout the process.

Its so random that they only allow 40 pounds on checked bags when all airlines take 55. They then charge you for each 10 extra pounds, so my checked suitcase was $130 and the flight $30 ... its like whattt, im for sure not traveling with Spirit again

So bad. The check in process was laborious and the check in agent didn't seem to know how to manage the process efficiently and was confused about how to check in my son's sports equipment. The baggage fees were outrageous and so expensive. $90 for a carry on bag? And $200 additional for 2 check ins. The security lines were insanely long and the terminal was not very nice in the Spirit area. $5 for a water on board. It was my first and last time flying Spirit - I tried to save $ by flying them due to the accommodating schedule but I should have paid for Southwest, because it would've actually ended up less expensive due to the free bags with Southwest. There were no charging ports on the airplane, no wifi and really uncomfortable seating. The flight crew were great though, courteous and efficient in their boarding. Flight was delayed 1 hour, but we made up 15 minutes in flight.

My experience was better than expected. What I did find not so great was the seats. Very little room, they did not recline and the tray table was the size of a post card. There was no food to try, just standard snacks that you had to pay for and I don’t know of any entertainment. I would fly again even though everything was an upcharge. Flight was on time with little disturbance

thy don't even ofer water we have to buy it for $4.49 and paid for our cary on bags $100 each we never will fly in this company again.

They cancelled the flight then did nothing to help us rebook. It was awful - I won’t fly with them again

The truck that was refueling the plane drove away with the hose still connected to the plane and ripped part of the plane off with it

The boarding time. I was in Section 1 the lady in charge just let people in section 3 without see us. Make a line , I have to step out and ask her. We were in the line and she just take my ticket and that’s it, so if I don’t ask her she could leave us at the end! We paid more for that privilege and. She doesn’t care….

See my previous comment which is mostly about our flight from Phoenix to SFO

The check in at the airport was awful. Told I need to pay for a bag. The item was taken at screening. I went back to get my $ back and they gave me a coupon with a QR code that doesn’t work. Worst costumer service ever!!!!!

4 hour delay because they used our aircraft to fly a different segment (per the captain)

Lost baggage on my connecting flight. 24 hours later, still no update on my bags.

I had to cancel within 1hour of the reservation an they put you through hell to . no live customer service desk. I'm handy caped and they make it almost impossible to cancel. They are steeling my money. You should not have that airline on your site. Contact me and I will give you all info. Of what the are doing to me just notable treatment they are set up like that to take people

Was using the bathroom and arrived 1 min 45 secs passed the terminal door closing . Wouldn’t let me on the flight and Frontier gate attendants as well desk manager were very rude and didn’t not assist nor provide any type of guidance. As a result I will not be able to get my children for the holidays. Frontier I will never fly with you all again. I also purchased a perk package what a waste .

absolutely horrific. delayed flights, overbooking. over charging. nightmare service beyond words. stay away.

Book cheap flights from Philadelphia to Ontario

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Philadelphia to Ontario found on KAYAK in the last 72 hours.
5/11Sat
1 stopFrontier
12h 51mPHL-ONT
$75
5/11Sat
1 stopFrontier
12h 51mPHL-ONT
$76
4/30Tue
1 stopDelta
8h 52mPHL-ONT
$135
5/12Sun
2 stopsDelta
13h 36mPHL-ONT
$140
5/11Sat
1 stopUnited Airlines
8h 03mPHL-ONT
$185
5/5Sun
1 stopAmerican Airlines
7h 47mPHL-ONT
$189
5/3Fri
2 stopsUnited Airlines
10h 14mPHL-ONT
$190
5/28Tue
2 stopsSouthwest
15h 35mPHL-ONT
$220
5/28Tue
1 stopSouthwest
11h 55mPHL-ONT
$224
5/20Mon
1 stopAmerican Airlines
9h 18mPHL-ONT
$871

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Last minute flights from Philadelphia to Ontario

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Philadelphia to Ontario that are departing in the next 10 days.
4/27Sat
multi-stopFrontier
12h 51mPHL-ONT
4/29Mon
multi-stopFrontier
11h 50mONT-PHL
$214
4/29Mon
multi-stopFrontier
12h 36mPHL-ONT
5/6Mon
multi-stopFrontier
19h 19mONT-PHL
$245
4/29Mon
multi-stopAmerican Airlines
10h 07mPHL-ONT
5/1Wed
multi-stopAmerican Airlines
8h 01mONT-PHL
$267
4/28Sun
multi-stopAmerican Airlines
8h 03mPHL-ONT
4/30Tue
multi-stopAmerican Airlines
7h 32mONT-PHL
$268
4/29Mon
multi-stopDelta
11h 41mPHL-ONT
5/1Wed
multi-stopDelta
9h 15mONT-PHL
$275
4/27Sat
multi-stopUnited Airlines
7h 58mPHL-ONT
4/30Tue
multi-stopUnited Airlines
6h 43mONT-PHL
$370
4/26Fri
multi-stopUnited Airlines
10h 22mPHL-ONT
4/28Sun
multi-stopUnited Airlines
8h 20mONT-PHL
$375
4/29Mon
multi-stopDelta
11h 41mPHL-ONT
5/1Wed
multi-stopDelta
13h 32mONT-PHL
$454
4/28Sun
multi-stopAlaska Airlines
29h 56mPHL-ONT
5/2Thu
multi-stopAlaska Airlines
9h 45mONT-PHL
$1,015
4/25Thu
multi-stopAlaska Airlines
14h 48mPHL-ONT
4/28Sun
multi-stopAlaska Airlines
19h 45mONT-PHL
$1,125

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Philadelphia - Ontario Flights

Departure:

Philadelphia (PHL)United States

Destination:

Ontario (ONT)United States

Return flight deals:

Ontario - Philadelphia

Cabin classes: