Find Cheap Flights from North America to Ontario

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Book cheap flights from North America to Ontario (round-trip)

Airports
Origin
Denver
$67
only
$67
Destination
Ontario
$67
only
$67
Tue, Jan 9
DEN
ONT
2h 27m
Sat, Jan 13
ONT
DEN
2h 24m
Trip: 5 days
5.7OkayShow reviews
Overall 5.7 Okay
Based on 3 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!

MSY
MCO
Excellent 10.0

Great crew great flight

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

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

AUS
LAS
Excellent 8.0

Efficient

N/a

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, Jan 10
DEN
ONT
2h 23m
Sat, Jan 13
ONT
DEN
2h 24m
Trip: 4 days
Overall 0.0 Poor
Based on 0 reviews
Thu, Feb 15
DEN
ONT
2h 20m
Wed, Feb 21
ONT
DEN
2h 20m
Trip: 7 days
6.8GoodShow reviews
Overall 6.8 Good
Based on 20 reviews
Overall
7.2
Boarding
7.4
Comfort
6.9
Crew
7.7
Entertainment
6.5
Food
6.4
IAD
CDG
Good 7.6

The food was particularly poor this flight.

MIA
ORD
Excellent 9.0

That it got me to Paris safe

No outlets to charge your phone, and the tv played the same movie over and over. The meals were also cheap. Didn't like any of them. Should have flown southwest or delta.

DEN
ONT
Mediocre 2.0

Bag was sent LAX. I have very important documents and items in my bag. Still waiting on it to arrive...

DEN
ONT
Excellent 10.0

no delays

DEN
ONT
Excellent 10.0

How smooth and fast everything was

Wed, Jan 10
DEN
ONT
2h 27m
Sat, Jan 13
ONT
DEN
2h 24m
Trip: 4 days
5.7OkayShow reviews
Overall 5.7 Okay
Based on 3 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

TYS
MCO
Okay 5.0

Great people

The plane wasn’t very clean

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.

Sat, Jan 13
DEN
ONT
2h 23m
Wed, Jan 17
ONT
DEN
2h 24m
Trip: 5 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Jan 10
DEN
ONT
2h 27m
Sat, Jan 13
ONT
DEN
2h 24m
Trip: 4 days
5.7OkayShow reviews
Overall 5.7 Okay
Based on 3 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
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.

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
MCO
Excellent 10.0

Great crew great flight

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

Wed, Feb 21
DEN
ONT
2h 20m
Wed, Feb 28
ONT
DEN
2h 20m
Trip: 8 days
6.8GoodShow reviews
Overall 6.8 Good
Based on 20 reviews
Overall
7.2
Boarding
7.4
Comfort
6.9
Crew
7.7
Entertainment
6.5
Food
6.4
DEN
ONT
Excellent 10.0

no delays

DEN
ONT
Excellent 10.0

How smooth and fast everything was

DEN
ONT
Excellent 10.0

Flight was a bit bumpy but staff was helpful and not deterred from providing great service.

MIA
ORD
Excellent 9.0

That it got me to Paris safe

No outlets to charge your phone, and the tv played the same movie over and over. The meals were also cheap. Didn't like any of them. Should have flown southwest or delta.

ATL
ORD
Excellent 8.0

The United pilot we flew that day. did great job. we arrive safe to the distination despite of the climate condition. im happy for the service.so far im satified..

the delayed flight this time almost cause us to lost our next flight in chicago. thats what i dont like. wish this wont happen next time..

Tue, Jan 16
DEN
ONT
2h 27m
Sat, Jan 20
ONT
DEN
2h 15m
Trip: 5 days
Overall 0.0 Poor
Based on 0 reviews
Tue, Jan 16
DEN
ONT
2h 27m
Wed, Jan 17
ONT
DEN
2h 24m
Trip: 2 days
5.7OkayShow reviews
Overall 5.7 Okay
Based on 3 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.

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

TYS
MCO
Okay 5.0

Great people

The plane wasn’t very clean

AUS
LAS
Excellent 8.0

Efficient

N/a

Thu, Feb 22
DEN
ONT
2h 20m
Wed, Feb 28
ONT
DEN
2h 16m
Trip: 7 days
6.8GoodShow reviews
Overall 6.8 Good
Based on 20 reviews
Overall
7.2
Boarding
7.4
Comfort
6.9
Crew
7.7
Entertainment
6.5
Food
6.4
DEN
ONT
Good 7.6

Nowhere to plug in phones or iPads. Snacks were marginal

RSW
EWR
Okay 5.3

Boarding quickly

No PED was available didn’t have anything for entertainment if you weren’t buying it seems every thing available for 3 hour flight and flight was scheduled for 2 hours and 55 minutes No snacks made available came thru once had a small bag of pretzels cup of coffee and never came back

DEN
ONT
Excellent 10.0

no delays

ATL
ORD
Excellent 8.0

The United pilot we flew that day. did great job. we arrive safe to the distination despite of the climate condition. im happy for the service.so far im satified..

the delayed flight this time almost cause us to lost our next flight in chicago. thats what i dont like. wish this wont happen next time..

MIA
ORD
Excellent 9.0

That it got me to Paris safe

No outlets to charge your phone, and the tv played the same movie over and over. The meals were also cheap. Didn't like any of them. Should have flown southwest or delta.

Wed, Jan 17
DEN
ONT
2h 27m
Sat, Jan 20
ONT
DEN
2h 15m
Trip: 4 days
Overall 0.0 Poor
Based on 0 reviews
Tue, Jan 9
DEN
ONT
2h 27m
Sat, Jan 20
ONT
DEN
2h 24m
Trip: 12 days
5.7OkayShow reviews
Overall 5.7 Okay
Based on 3 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.

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!!!!!

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

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.

Wed, Feb 28
DEN
ONT
2h 20m
Sat, Mar 3
ONT
DEN
2h 16m
Trip: 4 days
6.8GoodShow reviews
Overall 6.8 Good
Based on 20 reviews
Overall
7.2
Boarding
7.4
Comfort
6.9
Crew
7.7
Entertainment
6.5
Food
6.4
DEN
ONT
Excellent 10.0

How smooth and fast everything was

DEN
ONT
Excellent 10.0

Flight was a bit bumpy but staff was helpful and not deterred from providing great service.

DEN
ONT
Good 7.6

Nowhere to plug in phones or iPads. Snacks were marginal

IAD
CDG
Good 7.6

The food was particularly poor this flight.

RSW
EWR
Okay 5.3

Boarding quickly

No PED was available didn’t have anything for entertainment if you weren’t buying it seems every thing available for 3 hour flight and flight was scheduled for 2 hours and 55 minutes No snacks made available came thru once had a small bag of pretzels cup of coffee and never came back

Wed, Jan 17
DEN
ONT
2h 27m
Sat, Feb 3
ONT
DEN
2h 15m
Trip: 18 days
Overall 0.0 Poor
Based on 0 reviews
Thu, Mar 1
DEN
ONT
2h 20m
Sat, Mar 3
ONT
DEN
2h 16m
Trip: 3 days
6.8GoodShow reviews
Overall 6.8 Good
Based on 20 reviews
Overall
7.2
Boarding
7.4
Comfort
6.9
Crew
7.7
Entertainment
6.5
Food
6.4
DEN
ONT
Good 7.6

Nowhere to plug in phones or iPads. Snacks were marginal

DEN
ONT
Excellent 8.3

The flight was very smooth and fast. Great crew!

The food is terrible! Why give out anything?

DEN
ONT
Mediocre 2.0

Bag was sent LAX. I have very important documents and items in my bag. Still waiting on it to arrive...

RSW
EWR
Okay 5.3

Waiting

DEN
ONT
Excellent 10.0

no delays

Sat, Jan 6
DEN
ONT
2h 27m
Wed, Jan 10
ONT
DEN
2h 24m
Trip: 5 days
5.7OkayShow reviews
Overall 5.7 Okay
Based on 3 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
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

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.

SJU
ATL
Excellent 10.0

Fast luggage checking

No cash accepted for overweight baggage

MSY
MCO
Excellent 10.0

Great crew great flight

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

TYS
MCO
Okay 5.0

Great people

The plane wasn’t very clean

Thu, Feb 1
DEN
ONT
2h 27m
Tue, Feb 6
ONT
DEN
2h 15m
Trip: 6 days
Overall 0.0 Poor
Based on 0 reviews
Sat, Jan 13
DEN
ONT
2h 27m
Wed, Jan 17
ONT
DEN
2h 24m
Trip: 5 days
5.7OkayShow reviews
Overall 5.7 Okay
Based on 3 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
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
MCO
Excellent 10.0

Great crew great flight

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

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.

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.

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.

Thu, Jan 18
DEN
ONT
2h 27m
Tue, Jan 23
ONT
DEN
2h 15m
Trip: 6 days
Overall 0.0 Poor
Based on 0 reviews
Sat, Jan 27
DEN
ONT
2h 27m
Mon, Jan 29
ONT
DEN
2h 24m
Trip: 3 days
5.7OkayShow reviews
Overall 5.7 Okay
Based on 3 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.

TYS
MCO
Okay 5.0

Great people

The plane wasn’t very clean

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.

MSY
PVD
Excellent 8.0

The price!

*
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