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PHL - ONT

$84 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 6/7. 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 6/15
Sat 6/22

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 42,211,976 times on KAYAK, and here is why:

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

 
These are the cheapest deals for flights from Philadelphia to Ontario currently on KAYAK along with options from the most popular airlines KAYAK users selected for this route. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Philadelphia to Ontario

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Philadelphia to Ontario.

Recent one-way flight deals from Philadelphia to Ontario

Only flying one-way? Below are some of the best one-way flight deals from Philadelphia to Ontario found on KAYAK recently.

Recent last minute flight deals from Philadelphia to Ontario

Leaving soon but still want a bargain? Check out these latest deals for last minute flights from Philadelphia to Ontario.

Recent direct flight deals from Philadelphia to Ontario

The latest deals for direct flights from Philadelphia to Ontario so you can sit back and relax without the need for a layover.

Cheap bus & train deals from Philadelphia to Ontario

Find recent round-trip train or bus tickets from Philadelphia to Ontario.

All round-trip flight deals to Ontario

The cheapest plane tickets to Ontario found on KAYAK recently.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
8:20 am - 1:10 pmPHL-ONT
7h 50m1 stop
12:49 am - 5:36 amONT-PHL
25h 47m1 stop
$174Frontier
Find Deal
Mon, Jun 10 - Sat, Jun 15
8:20 am - 1:10 pmPHL-ONT
7h 50m1 stop
12:59 am - 12:13 pmONT-PHL
8h 14m1 stop
$175Frontier
Find Deal
Mon, Jun 10 - Thu, Jun 13
8:24 am - 12:47 pmPHL-ONT
7h 23m1 stop
8:35 pm - 6:49 amONT-PHL
7h 14m1 stop
$176Frontier
Find Deal
Tue, Sep 3 - Tue, Sep 10
8:27 pm - 11:44 pmPHL-ONT
30h 17m1 stop
12:59 am - 11:42 amONT-PHL
7h 43m1 stop
$177Frontier
Find Deal
Wed, Jun 5 - Tue, Jun 11
6:38 pm - 6:07 amPHL-ONT
14h 29m1 stop
12:49 am - 5:37 amONT-PHL
25h 48m1 stop
$178Frontier
Find Deal
Wed, Aug 14 - Sun, Aug 25
1:15 pm - 11:59 pmPHL-ONT
13h 44m1 stop
5:41 pm - 5:42 amONT-PHL
9h 01m1 stop
$179Frontier
Find Deal
Wed, May 29 - Wed, Jun 12
1:19 pm - 11:39 pmPHL-ONT
13h 20m1 stop
5:30 pm - 6:49 amONT-PHL
10h 19m1 stop
$180Frontier
Find Deal
Tue, Aug 13 - Tue, Aug 27
8:34 pm - 11:39 pmPHL-ONT
30h 05m1 stop
1:32 pm - 5:37 amONT-PHL
13h 05m1 stop
$181Frontier
Find Deal
Sat, Aug 17 - Tue, Aug 20
6:40 pm - 11:44 pmPHL-ONT
8h 04m1 stop
10:59 pm - 9:23 amONT-PHL
7h 24m1 stop
$280Delta
Find Deal
Wed, Aug 7 - Fri, Aug 16
7:10 am - 12:13 pmPHL-ONT
8h 03m1 stop
12:50 pm - 12:53 amONT-PHL
9h 03m1 stop
$319Delta
Find Deal
Thu, May 30 - Wed, Jun 5
8:24 am - 1:14 pmPHL-ONT
7h 50m1 stop
$84Frontier
Find Deal
Fri, Jun 7
8:24 am - 12:55 pmPHL-ONT
7h 31m1 stop
$90Frontier
Find Deal
Wed, May 22
6:55 pm - 11:43 pmPHL-ONT
7h 48m1 stop
$140Delta
Find Deal
Fri, May 24
5:02 pm - 10:12 pmPHL-ONT
8h 10m1 stop
$169Delta
Find Deal
Fri, Aug 9
10:30 am - 9:31 pmPHL-ONT
14h 01m2 stops
$196United Airlines
Find Deal
Wed, Sep 18
10:15 am - 9:11 pmPHL-ONT
13h 56m2 stops
$234United Airlines
Find Deal
Tue, Jul 9
6:53 pm - 10:52 pmPHL-ONT
30h 59m2 stops
$272Alaska Airlines
Find Deal
Fri, Oct 11
7:03 pm - 8:25 pmPHL-ONT
28h 22m2 stops
$297Alaska Airlines
Find Deal
Fri, May 31
6:32 am - 10:57 pmPHL-ONT
19h 25m2 stops
Sun, Jun 9
10:00 am - 10:57 pmPHL-ONT
15h 57m2 stops
Tue, Jul 16
8:27 pm - 11:59 pmPHL-ONT
30h 32m1 stop
11:07 pm - 5:39 amONT-PHL
27h 32m1 stop
$216Frontier
Find Deal
Sat, May 18 - Thu, May 23
1:15 pm - 11:59 pmPHL-ONT
13h 44m1 stop
5:41 pm - 5:05 amONT-PHL
8h 24m1 stop
$218Frontier
Find Deal
Tue, May 21 - Sat, May 25
8:24 am - 9:04 amPHL-ONT
27h 40m1 stop
12:59 am - 12:10 pmONT-PHL
8h 11m1 stop
$220Frontier
Find Deal
Tue, May 21 - Mon, May 27
8:26 pm - 11:59 pmPHL-ONT
30h 33m1 stop
11:07 pm - 5:39 amONT-PHL
27h 32m1 stop
$222Frontier
Find Deal
Mon, May 20 - Thu, May 23
6:55 pm - 11:43 pmPHL-ONT
7h 48m1 stop
10:00 pm - 9:33 amONT-PHL
8h 33m1 stop
$359Delta
Find Deal
Fri, May 17 - Mon, May 20
3:50 pm - 8:53 pmPHL-ONT
8h 03m1 stop
6:00 am - 11:19 pmONT-PHL
14h 19m2 stops
$385United Airlines
Find Deal
Sat, May 18 - Tue, May 21
10:05 am - 11:04 pmPHL-ONT
15h 59m2 stops
6:00 am - 11:19 pmONT-PHL
14h 19m2 stops
$390United Airlines
Find Deal
Sat, May 18 - Tue, May 21
6:55 pm - 11:43 pmPHL-ONT
7h 48m1 stop
6:42 pm - 10:35 amONT-PHL
12h 53m2 stops
$423Delta
Find Deal
Fri, May 17 - Mon, May 20
6:02 am - 3:26 pmPHL-ONT
12h 24m2 stops
11:00 am - 5:56 amONT-PHL
15h 56m2 stops
$1,279Alaska Airlines
Find Deal
Sat, May 18 - Mon, May 20
11:30 am - 9:55 pmPHL-ONT
13h 25m2 stops
7:10 am - 5:56 amONT-PHL
19h 46m2 stops
$1,428Alaska Airlines
Find Deal
Mon, May 20 - Mon, May 27

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 Sunday, 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 April, where tickets cost $269 on average. On the other hand, the most expensive months are June and December, where the average cost of tickets is $452 and $431 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 20 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 ($174) and Delta ($280). Frontier proposed the cheapest one-way flight at $84.

Good to know

Low season

January

High season

June

Cheapest flight

$84
Best time to beat the crowds with an average 5% drop in price.
Most popular time to fly with an average 21% increase in price.
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 $84 for a one-way ticket and $174 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 SkyTeam 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 $454 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 $648 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 10673 reviews
7.4Food
8.6Crew
7.9Comfort
8.0Entertainment
8.2Boarding
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.

Check in etc was very good. As for on the plane, it was like flying in a freezer. It was so cold, i have flown for years and never been so cold on a plane. Staff on board said its always cold when flying which is a load of rubbish. They wouldnt put any heating on and now i have the flu because of this .

I’ve had a couple flights this week on United that were delayed by an hour or more

Should have video screens Plane audio was poor and without wired connection hard to understand crew. Should serve more than just cups of water and pretzels on six hour flight. Did not see crew rest of flight. Fix charging sockets to retain charging blocks.

Generally good but there wasn’t any staff available when my luggage didn’t appear at baggage claim in Fresno. It took about half an hour to locate a staff member to open up the locked room where it was being kept.

Do not like the feeling of being in the basic economy. Everyone should feel good no matter what.

Our original business class flight was cancelled so we not only downgraded but we were also spread out across the plane not sitting together in separate middle seats. My poor kids were scared and couldn’t see me on the flight and the crew wasn’t sensitive to the situation and what the airlines did to us. Very dissatisfied with United airlines.

The WiFi didn’t work and the seats are too close together. Very uncomfortable.

So so. Terrible aircraft choice for that leg of the flight.

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.

Not being able to purchase my check in baggage online was a negative.

LATE LATE LATE!!! Plagued by late AA flights on this trip. Such a drag. This one was by far the worst.

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.

They stuck us with multiple extra fees. I will never fly spirit again

The guy with severe body odor sat next to me. For the whole duration of the flight it was a torture. The airline should have better policy on limiting people with bad body odor to board the flight. Passengers should not be the ones to endure bad odor for the whole duration of the flight. The airline should be e the one to ensure decent air quality for ever passenger.

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.

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.
6/7Fri
1 stopFrontier
7h 50mPHL-ONT
$84
5/22Wed
1 stopFrontier
7h 31mPHL-ONT
$90
5/24Fri
1 stopDelta
7h 48mPHL-ONT
$140
8/9Fri
1 stopDelta
8h 10mPHL-ONT
$169
9/18Wed
2 stopsUnited Airlines
14h 01mPHL-ONT
$196
7/9Tue
2 stopsUnited Airlines
13h 56mPHL-ONT
$234
10/11Fri
2 stopsAlaska Airlines
30h 59mPHL-ONT
$272
5/31Fri
2 stopsAlaska Airlines
28h 22mPHL-ONT
$297
6/9Sun
2 stops
19h 25mPHL-ONT
$459
7/16Tue
2 stops
15h 57mPHL-ONT
$468

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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.
5/18Sat
multi-stopFrontier
30h 32mPHL-ONT
5/23Thu
multi-stopFrontier
27h 32mONT-PHL
$216
5/21Tue
multi-stopFrontier
13h 44mPHL-ONT
5/25Sat
multi-stopFrontier
8h 24mONT-PHL
$218
5/21Tue
multi-stopFrontier
27h 40mPHL-ONT
5/27Mon
multi-stopFrontier
8h 11mONT-PHL
$220
5/20Mon
multi-stopFrontier
30h 33mPHL-ONT
5/23Thu
multi-stopFrontier
27h 32mONT-PHL
$222
5/17Fri
multi-stopDelta
7h 48mPHL-ONT
5/20Mon
multi-stopDelta
8h 33mONT-PHL
$359
5/18Sat
multi-stopUnited Airlines
8h 03mPHL-ONT
5/21Tue
multi-stopUnited Airlines
14h 19mONT-PHL
$385
5/18Sat
multi-stopUnited Airlines
15h 59mPHL-ONT
5/21Tue
multi-stopUnited Airlines
14h 19mONT-PHL
$390
5/17Fri
multi-stopDelta
7h 48mPHL-ONT
5/20Mon
multi-stopDelta
12h 53mONT-PHL
$423
5/18Sat
multi-stopAlaska Airlines
12h 24mPHL-ONT
5/20Mon
multi-stopAlaska Airlines
15h 56mONT-PHL
$1,279
5/20Mon
multi-stopAlaska Airlines
13h 25mPHL-ONT
5/27Mon
multi-stopAlaska Airlines
19h 46mONT-PHL
$1,428

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Philadelphia - Ontario Flights

Departure:

Philadelphia (undefined)United States

Destination:

Ontario (ONT)United States

Return flight deals:

Ontario - Philadelphia

Cabin classes: