Find Cheap Flights from Ontario to Philadelphia (ONT - PHL)

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Sun 12/17
Sun 12/24
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Good to Know

Low Season:
February
Best time to beat the crowds
2%
expected price decrease
High Season:
October
Most popular time to fly
3%
expected price increase
Average Price:
$466
(avg. price over the last 2 weeks)
Good Deal:
$358
or less (round trip)

When to Book Flights from Ontario to Philadelphia

Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top tips for Finding a Cheap Flight

Looking for a cheap flight? 25% of our users found flights on this route for $357 or less.
The cheapest flight from Ontario to Philadelphia was found 70 days before departure, on average.
Book at least 6 weeks before departure in order to get a below-average price.
High season is considered to be September, October and November. The cheapest month to fly is February.
Morning departure is around 11% cheaper than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for Booking Ontario to Philadelphia Flights

How long does a flight from Ontario to Philadelphia take?
An average nonstop flight takes 6h 11m, covering a distance of 2352 miles.
Which airlines provide the cheapest flights from Ontario to Philadelphia?
In the past 3 days, the cheapest round-trip tickets were found on Frontier ($238), Multiple Airlines ($301) and American Airlines ($427).
Do I need a passport to fly between Ontario and Philadelphia?
No.
What’s the cheapest day of the week to fly Ontario to Philadelphia?
For Ontario to Philadelphia, Saturday is the cheapest day to fly on average and Monday is the most expensive. Flying from Philadelphia back to Ontario, the best deals are generally found on Sunday, with Tuesday being the most expensive.

Book cheap flights from Ontario to Philadelphia (round-trip)

Airports
Origin
Ontario
$238
only
$238
Destination
Philadelphia
$238
only
$238
Sat, Jan 6
ONT
PHL
8h 57m
Sun, Jan 14
PHL
ONT
15h 26m
Trip: 9 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33270 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
LAS
IAD
Good 6.3

The staff on the flight was awesome, very helpful and kind to my friend who is terrified to fly. We were even ahead of schedule.

To pay for a carry on item is just crazy to me... not to mention you have to pay for beverages and snacks. All you are given is water.

ATL
DEN
Mediocre 3.6

The price was good, and it was a non stop flight.

The crew was rude and the seats didn't recline.

MSY
MCO
Excellent 10.0

Great crew great flight

Nothing, everything was awesome. Crazy to believe this was a 19 dollar flight

SJU
ATL
Excellent 10.0

Fast luggage checking

No cash accepted for overweight baggage

PHL
MCO
Mediocre 2.3

Its a scam! They act like they are giving you a break by having you buy cheap flights but in reality it costs more than a bit more expensive flight. I had to pay $45.00 each bag no matter if it was checked or carry-on. In total round trip I paid $180.00 extra just for my husbands carry-on as well as mine. Must add that our flights together cost 286.00. We should of went with American Airlines. On top of that we couldn't select our own seat if so, we had to pay extra, so we had to sit separated from each other. It was ridiculous! Never Again with this company!!!!!

Wed, Mar 14
ONT
PHL
10h 38m
Wed, Mar 21
PHL
ONT
10h 48m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Sun, Dec 24
ONT
PHL
7h 27m
Fri, Jan 5
PHL
ONT
8h 02m
Trip: 13 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 26055 reviews
Overall
7.3
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.6
HND
LAX
Okay 4.0

This flight was miserable. Seriously, one of the worst flight experiences I've ever had. The leg room was absurdly small. I'm not a tall person and I only had one inch in front of my legs. When the guy in front of me put his seat back it pressed into my knees. There wasn't enough space to bend down and untie my shoes, let alone get something out of my bag. My shoulder and knee were touching the guy next to me (a complete stranger) for the entire flight and there was nothing I could do about it. This was a red-eye but I absolutely could not sleep because it was so uncomfortable, so when we landed I had a terrible migraine and was nauseous and disoriented going through customs. I actually had to sit down in the airport because I though I was gonna pass out while trying to carry my bag, that's how shitty I felt after this flight. On top of that, not being able to sleep on the flight really messed up my sleep schedule and so jet lag from the time change has been made even worse, so I'm completely out of whack and its so much worse that it otherwise would have been because of the horrible flight. Also the food was gross and there wasn't enough of it. Even now, I don't think I have really communicated just how shitty this flight was. I was actually angry when I saw my seat upon boarding, and I'm still angry about it now.

JFK
CDG
Mediocre 2.0

Nothing. From the plane to the awful delay and poor service.

Lack of communication. Old plane, no comfort and 6 HOURS DELAYED. Truly disappointed by the airline

GRU
JFK
Mediocre 3.6

The only decent point was the food. Not great but at least edible.

Since check in in São Paulo was a complete chaos. There were only 2 people helping on check in (in machines) and these people were still not helping people (like me) with questions about on how to do check in in those machines. On the other hand to dispatch the bags there were almost 8 attendants to receive the bags. Ridiculous! I’ve tried calling American Airlines and Latam several times to assign a seat for me and they swore there were only middle seats but I know how airlines work to make extra money on these seats. At the end, they only gave me a middle seat option and I had to take I.t of course. On the plane I realized there were dozens of empty seats and yet they made sure not give them to me or anyone else. Unbelievable! Unfortunately I still have to use AA on my way back to Brazil. After this, I’ll chose another airlines for sure. Also, the 3,4,3 arrangement is ridiculous: there’s no corridor space making people touching you everything someone passes by your seat. And boy! Those seats are so uncomfortable and there’s no way to incline the chair so you can even have a little rest (because it’s impossible to even sleep on those seats). The crew were simply doing their jobs! No pleasure! No smile! No engaging with anyone unfortunately! They looked miserable and I asked for water and the flight attendant NEVER brought me anything. Seriously! Water is free!

JFK
MXP
Mediocre 2.6

Plane was old and dirty, seat pocket had junk in it. Seat was broken and couldn’t stay up. In flight movies were from few years back with a center tv and no head rest screen. Crew on overseas flights tend to be older in age and less tolerant..much better on continental on the same route.

CLE
JFK
Mediocre 3.3

Plane was dirty and crew inattentive.

Fri, Jan 26
ONT
PHL
8h 57m
Sun, Jan 28
PHL
ONT
15h 26m
Trip: 3 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33270 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SJU
ATL
Excellent 10.0

Fast luggage checking

No cash accepted for overweight baggage

MSY
PVD
Excellent 8.0

The price!

LAS
IAD
Good 6.3

The staff on the flight was awesome, very helpful and kind to my friend who is terrified to fly. We were even ahead of schedule.

To pay for a carry on item is just crazy to me... not to mention you have to pay for beverages and snacks. All you are given is water.

TYS
MCO
Okay 5.0

Great people

The plane wasn’t very clean

IAD
LAS
Good 6.3

They gave me and someone else the same seat luckily it wasn’t a packed flight and was able to move to a row that was empty

Wed, Feb 7
ONT
PHL
8h 57m
Tue, Feb 13
PHL
ONT
15h 26m
Trip: 7 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33270 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
MSY
MCO
Excellent 10.0

Great crew great flight

Nothing, everything was awesome. Crazy to believe this was a 19 dollar flight

DEN
SFO
Mediocre 2.0

Website would not let me check in the day before or the morning or my flight. There was an error every time and I almost got to the end once. I could not change the time of my transportation and arrived 10 minutes past the check in deadline (an hour prior to the flight taking off). I was refused access to the flight and offered a flight 5 hours later. The staff was rude and not helpful. I had heard negative things about Frontier and now I know why.

MSY
PVD
Excellent 8.0

The price!

LAS
IAD
Good 6.3

The staff on the flight was awesome, very helpful and kind to my friend who is terrified to fly. We were even ahead of schedule.

To pay for a carry on item is just crazy to me... not to mention you have to pay for beverages and snacks. All you are given is water.

AUS
LAS
Excellent 8.0

Efficient

N/a

Fri, Apr 13
ONT
PHL
16h 12m
Sat, Apr 14
PHL
ONT
17h 48m
Trip: 2 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33270 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
ATL
DEN
Mediocre 3.6

The price was good, and it was a non stop flight.

The crew was rude and the seats didn't recline.

IAD
LAS
Good 6.3

They gave me and someone else the same seat luckily it wasn’t a packed flight and was able to move to a row that was empty

PHL
MCO
Mediocre 2.3

Its a scam! They act like they are giving you a break by having you buy cheap flights but in reality it costs more than a bit more expensive flight. I had to pay $45.00 each bag no matter if it was checked or carry-on. In total round trip I paid $180.00 extra just for my husbands carry-on as well as mine. Must add that our flights together cost 286.00. We should of went with American Airlines. On top of that we couldn't select our own seat if so, we had to pay extra, so we had to sit separated from each other. It was ridiculous! Never Again with this company!!!!!

MSY
PVD
Excellent 8.0

The price!

DEN
MKE
Good 6.6

Direct flight from Denver to Milwaukee. Didn't have to wait on tarmac so that was a plus.

Have to pay for every little thring down to the peanuts

Sat, Feb 17
ONT
PHL
10h 15m
Thu, Feb 22
PHL
ONT
15h 26m
Trip: 6 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33270 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
IAD
LAS
Good 6.3

They gave me and someone else the same seat luckily it wasn’t a packed flight and was able to move to a row that was empty

DEN
SFO
Mediocre 2.0

Website would not let me check in the day before or the morning or my flight. There was an error every time and I almost got to the end once. I could not change the time of my transportation and arrived 10 minutes past the check in deadline (an hour prior to the flight taking off). I was refused access to the flight and offered a flight 5 hours later. The staff was rude and not helpful. I had heard negative things about Frontier and now I know why.

LAS
IAD
Good 6.3

The staff on the flight was awesome, very helpful and kind to my friend who is terrified to fly. We were even ahead of schedule.

To pay for a carry on item is just crazy to me... not to mention you have to pay for beverages and snacks. All you are given is water.

MSY
PVD
Excellent 8.0

The price!

PHL
MCO
Mediocre 2.3

Its a scam! They act like they are giving you a break by having you buy cheap flights but in reality it costs more than a bit more expensive flight. I had to pay $45.00 each bag no matter if it was checked or carry-on. In total round trip I paid $180.00 extra just for my husbands carry-on as well as mine. Must add that our flights together cost 286.00. We should of went with American Airlines. On top of that we couldn't select our own seat if so, we had to pay extra, so we had to sit separated from each other. It was ridiculous! Never Again with this company!!!!!

Thu, May 3
ONT
PHL
16h 50m
Sat, May 5
PHL
ONT
17h 42m
Trip: 3 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33270 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
MSY
MCO
Excellent 10.0

Great crew great flight

Nothing, everything was awesome. Crazy to believe this was a 19 dollar flight

IAD
LAS
Good 6.3

They gave me and someone else the same seat luckily it wasn’t a packed flight and was able to move to a row that was empty

PHL
MCO
Mediocre 2.3

Its a scam! They act like they are giving you a break by having you buy cheap flights but in reality it costs more than a bit more expensive flight. I had to pay $45.00 each bag no matter if it was checked or carry-on. In total round trip I paid $180.00 extra just for my husbands carry-on as well as mine. Must add that our flights together cost 286.00. We should of went with American Airlines. On top of that we couldn't select our own seat if so, we had to pay extra, so we had to sit separated from each other. It was ridiculous! Never Again with this company!!!!!

DEN
MKE
Good 6.6

Direct flight from Denver to Milwaukee. Didn't have to wait on tarmac so that was a plus.

Have to pay for every little thring down to the peanuts

MSY
PVD
Excellent 8.0

The price!

Wed, Jun 6
ONT
PHL
7h 29m
Mon, Jun 11
PHL
ONT
17h 42m
Trip: 6 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33270 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SJU
ATL
Excellent 10.0

Fast luggage checking

No cash accepted for overweight baggage

IAD
LAS
Good 6.3

They gave me and someone else the same seat luckily it wasn’t a packed flight and was able to move to a row that was empty

DEN
SFO
Mediocre 2.0

Website would not let me check in the day before or the morning or my flight. There was an error every time and I almost got to the end once. I could not change the time of my transportation and arrived 10 minutes past the check in deadline (an hour prior to the flight taking off). I was refused access to the flight and offered a flight 5 hours later. The staff was rude and not helpful. I had heard negative things about Frontier and now I know why.

MSY
MCO
Excellent 10.0

Great crew great flight

Nothing, everything was awesome. Crazy to believe this was a 19 dollar flight

PHL
MCO
Mediocre 2.3

Its a scam! They act like they are giving you a break by having you buy cheap flights but in reality it costs more than a bit more expensive flight. I had to pay $45.00 each bag no matter if it was checked or carry-on. In total round trip I paid $180.00 extra just for my husbands carry-on as well as mine. Must add that our flights together cost 286.00. We should of went with American Airlines. On top of that we couldn't select our own seat if so, we had to pay extra, so we had to sit separated from each other. It was ridiculous! Never Again with this company!!!!!

Mon, Dec 25
ONT
PHL
7h 04m
Sun, Dec 31
PHL
ONT
8h 00m
Trip: 7 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 26055 reviews
Overall
7.3
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.6
DFW
PBI
Okay 5.6

Free movies, and crew were helpful once we were in the air

Gate agent did not start forcing check in, which caused delay in boarding. Ground crew did not stock aircraft until 20 minutes after scheduled departure time. and DFW did the usual 20 minute taxi and then 15 minute hold prior to take off.

GRU
JFK
Mediocre 3.6

The only decent point was the food. Not great but at least edible.

Since check in in São Paulo was a complete chaos. There were only 2 people helping on check in (in machines) and these people were still not helping people (like me) with questions about on how to do check in in those machines. On the other hand to dispatch the bags there were almost 8 attendants to receive the bags. Ridiculous! I’ve tried calling American Airlines and Latam several times to assign a seat for me and they swore there were only middle seats but I know how airlines work to make extra money on these seats. At the end, they only gave me a middle seat option and I had to take I.t of course. On the plane I realized there were dozens of empty seats and yet they made sure not give them to me or anyone else. Unbelievable! Unfortunately I still have to use AA on my way back to Brazil. After this, I’ll chose another airlines for sure. Also, the 3,4,3 arrangement is ridiculous: there’s no corridor space making people touching you everything someone passes by your seat. And boy! Those seats are so uncomfortable and there’s no way to incline the chair so you can even have a little rest (because it’s impossible to even sleep on those seats). The crew were simply doing their jobs! No pleasure! No smile! No engaging with anyone unfortunately! They looked miserable and I asked for water and the flight attendant NEVER brought me anything. Seriously! Water is free!

HND
LAX
Okay 4.0

This flight was miserable. Seriously, one of the worst flight experiences I've ever had. The leg room was absurdly small. I'm not a tall person and I only had one inch in front of my legs. When the guy in front of me put his seat back it pressed into my knees. There wasn't enough space to bend down and untie my shoes, let alone get something out of my bag. My shoulder and knee were touching the guy next to me (a complete stranger) for the entire flight and there was nothing I could do about it. This was a red-eye but I absolutely could not sleep because it was so uncomfortable, so when we landed I had a terrible migraine and was nauseous and disoriented going through customs. I actually had to sit down in the airport because I though I was gonna pass out while trying to carry my bag, that's how shitty I felt after this flight. On top of that, not being able to sleep on the flight really messed up my sleep schedule and so jet lag from the time change has been made even worse, so I'm completely out of whack and its so much worse that it otherwise would have been because of the horrible flight. Also the food was gross and there wasn't enough of it. Even now, I don't think I have really communicated just how shitty this flight was. I was actually angry when I saw my seat upon boarding, and I'm still angry about it now.

JFK
MXP
Mediocre 2.6

Plane was old and dirty, seat pocket had junk in it. Seat was broken and couldn’t stay up. In flight movies were from few years back with a center tv and no head rest screen. Crew on overseas flights tend to be older in age and less tolerant..much better on continental on the same route.

PHX
PDX
Excellent 9.0

I like how quick and efficient the boarding and check in process was.

I just wish that if I paid a little more for seats I should get more comfortable and roomier seats is all. Don’t make the seats sit so upright.

Thu, Apr 5
ONT
PHL
25h 43m
Mon, Apr 9
PHL
ONT
17h 48m
Trip: 5 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33270 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
MSY
PVD
Excellent 8.0

The price!

SJU
ATL
Excellent 10.0

Fast luggage checking

No cash accepted for overweight baggage

DEN
SFO
Mediocre 2.0

Website would not let me check in the day before or the morning or my flight. There was an error every time and I almost got to the end once. I could not change the time of my transportation and arrived 10 minutes past the check in deadline (an hour prior to the flight taking off). I was refused access to the flight and offered a flight 5 hours later. The staff was rude and not helpful. I had heard negative things about Frontier and now I know why.

MKE
TPA
Good 6.6

2nd row had plenty of leg room, nice new jet, Nice flight attendants, smooth flight, on time, made it to my destination safe. Successful flight! TSA Pre-chek was nice.

Idiot in front of me reclined his seat. Plane didn't get catered overnight. Water only.

ATL
DEN
Mediocre 3.6

The price was good, and it was a non stop flight.

The crew was rude and the seats didn't recline.

Sat, Dec 23
ONT
PHL
6h 11m
Tue, Dec 26
PHL
ONT
8h 11m
Trip: 4 days
7.2GoodShow reviews
Overall 7.2 Good
Based on 26055 reviews
Overall
7.3
Boarding
7.5
Comfort
7.1
Crew
7.8
Entertainment
6.7
Food
6.6
HND
LAX
Okay 4.0

This flight was miserable. Seriously, one of the worst flight experiences I've ever had. The leg room was absurdly small. I'm not a tall person and I only had one inch in front of my legs. When the guy in front of me put his seat back it pressed into my knees. There wasn't enough space to bend down and untie my shoes, let alone get something out of my bag. My shoulder and knee were touching the guy next to me (a complete stranger) for the entire flight and there was nothing I could do about it. This was a red-eye but I absolutely could not sleep because it was so uncomfortable, so when we landed I had a terrible migraine and was nauseous and disoriented going through customs. I actually had to sit down in the airport because I though I was gonna pass out while trying to carry my bag, that's how shitty I felt after this flight. On top of that, not being able to sleep on the flight really messed up my sleep schedule and so jet lag from the time change has been made even worse, so I'm completely out of whack and its so much worse that it otherwise would have been because of the horrible flight. Also the food was gross and there wasn't enough of it. Even now, I don't think I have really communicated just how shitty this flight was. I was actually angry when I saw my seat upon boarding, and I'm still angry about it now.

DFW
SCL
Excellent 9.6

The food is very tasty, but AA has not changed the menu in at least one year.

SJU
PHL
Good 6.3

My screen was not responsive most of the time

PHL
ATL
Okay 5.3

On time

Rude flight attendant

JFK
CDG
Mediocre 2.0

Nothing. From the plane to the awful delay and poor service.

Lack of communication. Old plane, no comfort and 6 HOURS DELAYED. Truly disappointed by the airline

Show more results
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The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.