Find Cheap Flights from Chicago O'Hare International to Ontario (ORD - ONT)

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Good to Know

Low Season:
September
Best time to beat the crowds
3%
expected price decrease
High Season:
March
Most popular time to fly
2%
expected price increase
Average Price:
$370
(avg. price over the last 2 weeks)
Good Deal:
$263
or less (round trip)

When to Book Flights from Chicago O'Hare International to Ontario

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 $263 or less.
The cheapest flight from Chicago O'Hare International to Ontario was found 46 days before departure, on average.
Book at least 3 weeks before departure in order to get a below-average price.
High season is considered to be February, March and April. The cheapest month to fly is September.
Morning departure is around 22% more expensive 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 Chicago O'Hare International to Ontario Flights

How long does a flight from Chicago O'Hare International to Ontario take?
An average nonstop flight takes 7h 47m, covering a distance of 1697 miles.
Which airlines provide the cheapest flights from Chicago O'Hare International to Ontario?
In the past 3 days, the cheapest round-trip tickets were found on Frontier ($144), Multiple Airlines ($178) and United ($200).
Do I need a passport to fly between Chicago O'Hare International and Ontario?
No.
What’s the cheapest day of the week to fly Chicago O'Hare International to Ontario?
For Chicago O'Hare International to Ontario, Tuesday is the cheapest day to fly on average and Friday is the most expensive. Flying from Ontario back to Chicago O'Hare International, the best deals are generally found on Thursday, with Tuesday being the most expensive.

Book cheap flights from Chicago O'Hare International to Ontario (round-trip)

Airports
Origin
Chicago
$144
only
$144
Destination
Ontario
$144
only
$144
Tue, Jan 23
ORD
ONT
15h 12m
Tue, Jan 30
ONT
ORD
12h 57m
Trip: 8 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33532 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
SFO
MCO
Okay 4.6

On time

Told to get there 3 hours before,checkin opened 2 hours before. Plane was clean,and fairly new, seat most uncomfortable,limited leg room. Total fare plus $150 for luggage , NOT a budget price. First and last time user.

AUS
PHX
Excellent 10.0

Everything

Nothing

MCO
OKC
Okay 4.3

Long lines

LAX
MCO
Okay 4.6

Very uncomfortable plane

ORD
TPA
Good 6.6

No frills but really good airfare. If traveling on a budget and can live without the basic frills it’s a great deal.

No in flight entertainment, seats don’t recline.

Sun, Feb 4
ORD
ONT
13h 57m
Tue, Feb 6
ONT
ORD
7h 08m
Trip: 3 days
Overall 0.0 Poor
Based on 0 reviews
Tue, Apr 3
ORD
ONT
7h 47m
Tue, Apr 10
ONT
ORD
7h 56m
Trip: 8 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 53619 reviews
Overall
7.2
Boarding
7.4
Comfort
6.9
Crew
7.7
Entertainment
6.5
Food
6.4
MRY
LAX
Mediocre 2.6

This was one of the worst domestic flights I’ve ever taken. United Airlines had a maintenance problem I’m delayed this plane by one hour every hour for six hours keeping us captive at the airport !! Horrible service horrible Airline I will try to avoid this at all costS.

CLT
IAH
Okay 4.6

They never have enough food selections in First Class

ORD
LHR
Mediocre 2.0

Nothing at all!!! That should really tell you something!

The staff were rude, abrasive, ignored several passengers that were trying to get her attention before take off as 2 overhead bins were wide open and full to the brim. She of course was too busy playing on her cell phone in the back of the plane and ignored/silenced the passenger call button. They were so loud when people were sleeping, yelling ‘trash please’ every 5 minutes, we are not stupid, we can see what you are doing and if we have trash, we will give it to you - so please STOP disturbing my peace and let me bloody sleep!!!! I was never offered any food or drink during the entire flight, not even when I was awake - other airline attendants are more observant and come back and ask us when we are awake if we would like anything to eat or drink. So essentially that was 7 hours with nothing after having paid a little over $700 for what was seemingly the WORST transatlantic flight I’ve ever taken. I travel back and forth often, because I’m a dual national, but I will stick to BA or Virgin Atlantic - the planes and service are far superior to this pile of turd that goes by the name of United. There were no charging facilities (power outlet or USB port) and the TVs had such horrendous resolution that you would get a headache from having to squint at the screen.

PDX
SFO
Good 7.0

I liked that it was a short flight and that the over-head bins were big enough for my backpack.

I didn't like that my friends, who bought their tickets at the same time I did, with their own cards and checked in at the same time as me, didn't get a seat number. I had one assigned when my ticket printed out, after I checked in at the airport after they did. They had to wait until boarding was almost complete before they were afforded a seat. Seemed really strange. With United already having a bad name from recent stories on the news, it made us worry. Don't like worrying when it has anything to do with an airplane.

SAV
EWR
Okay 4.0

Nothing

Everything

Mon, Jan 29
ORD
ONT
24h 11m
Thu, Feb 1
ONT
ORD
12h 57m
Trip: 4 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33532 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
LAX
MCO
Okay 4.6

Very uncomfortable plane

CLT
MCO
Excellent 10.0

Friendliness of staff

No water passed out

ORD
DEN
Mediocre 2.0

We got delayed because the plane broke down. Everyone else got $100 credit, but I didn't because I booked through Kayak. Could you please give me the credit?

AUS
ONT
Okay 5.0

The fair was low and boarding was efficient.

The booking process was terrible online. There’s a charge for refreshments, the tray table is tiny, the staff didn’t seem happy, the seats don’t recline at all, they charge for carry ons, no outlet to charge my device.

AUS
PHX
Excellent 10.0

Everything

Nothing

Sat, Feb 3
ORD
ONT
24h 11m
Tue, Feb 6
ONT
ORD
12h 57m
Trip: 4 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33532 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
AUS
PHX
Excellent 10.0

Everything

Nothing

CLT
MCO
Excellent 10.0

Friendliness of staff

No water passed out

ORD
DEN
Mediocre 2.0

We got delayed because the plane broke down. Everyone else got $100 credit, but I didn't because I booked through Kayak. Could you please give me the credit?

SFO
MCO
Okay 4.6

On time

Told to get there 3 hours before,checkin opened 2 hours before. Plane was clean,and fairly new, seat most uncomfortable,limited leg room. Total fare plus $150 for luggage , NOT a budget price. First and last time user.

IAD
AUS
Mediocre 2.0

Lots of miscommunication and no help with assisting passengers off plane to rebook Austin to San Diego flight

Sun, Feb 4
ORD
ONT
13h 57m
Tue, Feb 6
ONT
ORD
12h 57m
Trip: 3 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33532 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
MCO
SFO
Okay 5.6

Flight wasn’t bad for what I paid for. One MUST definitely do his/her homework before flying to be prepared for all of the extra costs, etc... I was glad I did and was prepared with my own food, neck pillow, etc. I didn’t expect much in terms of creature comforts and therefore wasn’t disappointed. There isn’t much space in the cabin, so I was glad to have my 6-year old in between us 2 adults. Crew was pleasant r and professional. Ticket agent was helpful if a bit “assertive”. I probably won’t try to book them for long flights, but for short flights their fine

The tiny space and small seats!

DEN
ATL
Mediocre 3.0

I FINALLY arrived at my destination.

Huge delay, no explanation. Cabin filthy.

AUS
ONT
Okay 5.0

The fair was low and boarding was efficient.

The booking process was terrible online. There’s a charge for refreshments, the tray table is tiny, the staff didn’t seem happy, the seats don’t recline at all, they charge for carry ons, no outlet to charge my device.

IAD
AUS
Mediocre 2.0

Lots of miscommunication and no help with assisting passengers off plane to rebook Austin to San Diego flight

ORD
TPA
Good 6.6

No frills but really good airfare. If traveling on a budget and can live without the basic frills it’s a great deal.

No in flight entertainment, seats don’t recline.

Mon, Mar 26
ORD
ONT
7h 47m
Tue, Mar 27
ONT
ORD
12h 35m
Trip: 2 days
Overall 0.0 Poor
Based on 0 reviews
Tue, Mar 6
ORD
ONT
15h 08m
Tue, Mar 13
ONT
ORD
12h 35m
Trip: 7 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33532 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
MCO
OKC
Okay 4.3

Long lines

IAD
AUS
Mediocre 2.0

Lots of miscommunication and no help with assisting passengers off plane to rebook Austin to San Diego flight

AUS
PHX
Excellent 10.0

Everything

Nothing

DEN
ATL
Mediocre 3.0

I FINALLY arrived at my destination.

Huge delay, no explanation. Cabin filthy.

SFO
MCO
Okay 4.6

On time

Told to get there 3 hours before,checkin opened 2 hours before. Plane was clean,and fairly new, seat most uncomfortable,limited leg room. Total fare plus $150 for luggage , NOT a budget price. First and last time user.

Tue, Jan 23
ORD
ONT
15h 12m
Tue, Jan 30
ONT
ORD
6h 59m
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Apr 11
ORD
ONT
12h 25m
Tue, Apr 17
ONT
ORD
9h 08m
Trip: 7 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33532 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
LAX
MCO
Okay 4.6

Very uncomfortable plane

CLT
MCO
Excellent 10.0

Friendliness of staff

No water passed out

CVG
RSW
Okay 4.3

The seats don't move so very uncomfortable to try and relax. No free beverages. Bag fees are riduculous.

ORD
DEN
Mediocre 2.0

We got delayed because the plane broke down. Everyone else got $100 credit, but I didn't because I booked through Kayak. Could you please give me the credit?

AUS
ONT
Okay 5.0

The fair was low and boarding was efficient.

The booking process was terrible online. There’s a charge for refreshments, the tray table is tiny, the staff didn’t seem happy, the seats don’t recline at all, they charge for carry ons, no outlet to charge my device.

Wed, May 2
ORD
ONT
12h 13m
Tue, May 8
ONT
ORD
9h 13m
Trip: 7 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33532 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
ORD
DEN
Mediocre 2.0

We got delayed because the plane broke down. Everyone else got $100 credit, but I didn't because I booked through Kayak. Could you please give me the credit?

DEN
ATL
Mediocre 3.0

I FINALLY arrived at my destination.

Huge delay, no explanation. Cabin filthy.

MCO
SFO
Okay 5.6

Flight wasn’t bad for what I paid for. One MUST definitely do his/her homework before flying to be prepared for all of the extra costs, etc... I was glad I did and was prepared with my own food, neck pillow, etc. I didn’t expect much in terms of creature comforts and therefore wasn’t disappointed. There isn’t much space in the cabin, so I was glad to have my 6-year old in between us 2 adults. Crew was pleasant r and professional. Ticket agent was helpful if a bit “assertive”. I probably won’t try to book them for long flights, but for short flights their fine

The tiny space and small seats!

LAX
MCO
Okay 4.6

Very uncomfortable plane

CLT
MCO
Excellent 10.0

Friendliness of staff

No water passed out

Tue, Mar 27
ORD
ONT
8h 15m
Wed, Apr 4
ONT
ORD
6h 29m
Trip: 9 days
Overall 0.0 Poor
Based on 0 reviews
Wed, May 2
ORD
ONT
12h 13m
Tue, May 8
ONT
ORD
9h 13m
Trip: 7 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33532 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
CLT
MCO
Excellent 10.0

Friendliness of staff

No water passed out

MCO
SFO
Okay 5.6

Flight wasn’t bad for what I paid for. One MUST definitely do his/her homework before flying to be prepared for all of the extra costs, etc... I was glad I did and was prepared with my own food, neck pillow, etc. I didn’t expect much in terms of creature comforts and therefore wasn’t disappointed. There isn’t much space in the cabin, so I was glad to have my 6-year old in between us 2 adults. Crew was pleasant r and professional. Ticket agent was helpful if a bit “assertive”. I probably won’t try to book them for long flights, but for short flights their fine

The tiny space and small seats!

ORD
TPA
Good 6.6

No frills but really good airfare. If traveling on a budget and can live without the basic frills it’s a great deal.

No in flight entertainment, seats don’t recline.

MCO
OKC
Okay 4.3

Long lines

LAX
MCO
Okay 4.6

Very uncomfortable plane

Sat, Jul 14
ORD
ONT
8h 18m
Fri, Jul 20
ONT
ORD
8h 23m
Trip: 7 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 53619 reviews
Overall
7.2
Boarding
7.4
Comfort
6.9
Crew
7.7
Entertainment
6.5
Food
6.4
IAH
SNA
Okay 5.0

Never enough food selections

SCL
IAH
Okay 4.3

I paid for extra space and it satisfy my needs.

The personnel service during the flight was mediocre. In my opinion they don’t know what is customer satisfaction. They have to show that they like what they do with a simple smile. They are not doing the customer a favor . That is their job a good customer satisfaction

ORD
LHR
Mediocre 2.0

Nothing at all!!! That should really tell you something!

The staff were rude, abrasive, ignored several passengers that were trying to get her attention before take off as 2 overhead bins were wide open and full to the brim. She of course was too busy playing on her cell phone in the back of the plane and ignored/silenced the passenger call button. They were so loud when people were sleeping, yelling ‘trash please’ every 5 minutes, we are not stupid, we can see what you are doing and if we have trash, we will give it to you - so please STOP disturbing my peace and let me bloody sleep!!!! I was never offered any food or drink during the entire flight, not even when I was awake - other airline attendants are more observant and come back and ask us when we are awake if we would like anything to eat or drink. So essentially that was 7 hours with nothing after having paid a little over $700 for what was seemingly the WORST transatlantic flight I’ve ever taken. I travel back and forth often, because I’m a dual national, but I will stick to BA or Virgin Atlantic - the planes and service are far superior to this pile of turd that goes by the name of United. There were no charging facilities (power outlet or USB port) and the TVs had such horrendous resolution that you would get a headache from having to squint at the screen.

HNL
SFO
Okay 5.6

On time

Extremely crowded, uncomfortably so

EWR
DFW
Okay 4.0

That i finally got hom

I called bc of weather issues, and it said you may have a wait time more than 30 minutes. I waited 2 hrs and 45 mins without any update on how much longer it would be. The website told me to go to the airport the day before to see a representative. I went to the airport and they told me call back or come back the next day. Information was all inaccurate and after another 55 min wait on the phone (stated “more than 30 mins) i got an agent and rebooked my ticket.

Wed, Jun 6
ORD
ONT
12h 13m
Tue, Jun 12
ONT
ORD
9h 13m
Trip: 7 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33532 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
CLT
MCO
Excellent 10.0

Friendliness of staff

No water passed out

AUS
ONT
Okay 5.0

The fair was low and boarding was efficient.

The booking process was terrible online. There’s a charge for refreshments, the tray table is tiny, the staff didn’t seem happy, the seats don’t recline at all, they charge for carry ons, no outlet to charge my device.

LAX
MCO
Okay 4.6

Very uncomfortable plane

ORD
TPA
Good 6.6

No frills but really good airfare. If traveling on a budget and can live without the basic frills it’s a great deal.

No in flight entertainment, seats don’t recline.

MCO
SFO
Okay 5.6

Flight wasn’t bad for what I paid for. One MUST definitely do his/her homework before flying to be prepared for all of the extra costs, etc... I was glad I did and was prepared with my own food, neck pillow, etc. I didn’t expect much in terms of creature comforts and therefore wasn’t disappointed. There isn’t much space in the cabin, so I was glad to have my 6-year old in between us 2 adults. Crew was pleasant r and professional. Ticket agent was helpful if a bit “assertive”. I probably won’t try to book them for long flights, but for short flights their fine

The tiny space and small seats!

Wed, Jun 6
ORD
ONT
12h 13m
Fri, Jun 8
ONT
ORD
23h 52m
Trip: 3 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33532 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
ORD
DEN
Mediocre 2.0

We got delayed because the plane broke down. Everyone else got $100 credit, but I didn't because I booked through Kayak. Could you please give me the credit?

CVG
RSW
Okay 4.3

The seats don't move so very uncomfortable to try and relax. No free beverages. Bag fees are riduculous.

SFO
MCO
Okay 4.6

On time

Told to get there 3 hours before,checkin opened 2 hours before. Plane was clean,and fairly new, seat most uncomfortable,limited leg room. Total fare plus $150 for luggage , NOT a budget price. First and last time user.

AUS
ONT
Okay 5.0

The fair was low and boarding was efficient.

The booking process was terrible online. There’s a charge for refreshments, the tray table is tiny, the staff didn’t seem happy, the seats don’t recline at all, they charge for carry ons, no outlet to charge my device.

DEN
ATL
Mediocre 3.0

I FINALLY arrived at my destination.

Huge delay, no explanation. Cabin filthy.

Thu, Feb 1
ORD
ONT
15h 12m
Mon, Feb 5
ONT
ORD
21h 56m
Trip: 5 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33532 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
CLT
MCO
Excellent 10.0

Friendliness of staff

No water passed out

CVG
RSW
Okay 4.3

The seats don't move so very uncomfortable to try and relax. No free beverages. Bag fees are riduculous.

ORD
TPA
Good 6.6

No frills but really good airfare. If traveling on a budget and can live without the basic frills it’s a great deal.

No in flight entertainment, seats don’t recline.

AUS
ONT
Okay 5.0

The fair was low and boarding was efficient.

The booking process was terrible online. There’s a charge for refreshments, the tray table is tiny, the staff didn’t seem happy, the seats don’t recline at all, they charge for carry ons, no outlet to charge my device.

AUS
PHX
Excellent 10.0

Everything

Nothing

Wed, Jul 11
ORD
ONT
17h 46m
Tue, Jul 17
ONT
ORD
21h 51m
Trip: 7 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33532 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
CVG
RSW
Okay 4.3

The seats don't move so very uncomfortable to try and relax. No free beverages. Bag fees are riduculous.

IAD
AUS
Mediocre 2.0

Lots of miscommunication and no help with assisting passengers off plane to rebook Austin to San Diego flight

LAX
MCO
Okay 4.6

Very uncomfortable plane

CLT
MCO
Excellent 10.0

Friendliness of staff

No water passed out

AUS
PHX
Excellent 10.0

Everything

Nothing

Fri, Feb 16
ORD
ONT
15h 12m
Sun, Feb 18
ONT
ORD
12h 36m
Trip: 3 days
5.6OkayShow reviews
Overall 5.6 Okay
Based on 33532 reviews
Overall
5.9
Boarding
6.4
Comfort
5.4
Crew
6.8
Entertainment
4.5
Food
4.7
LAX
MCO
Okay 4.6

Very uncomfortable plane

MCO
OKC
Okay 4.3

Long lines

AUS
PHX
Excellent 10.0

Everything

Nothing

AUS
ONT
Okay 5.0

The fair was low and boarding was efficient.

The booking process was terrible online. There’s a charge for refreshments, the tray table is tiny, the staff didn’t seem happy, the seats don’t recline at all, they charge for carry ons, no outlet to charge my device.

ORD
DEN
Mediocre 2.0

We got delayed because the plane broke down. Everyone else got $100 credit, but I didn't because I booked through Kayak. Could you please give me the credit?

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Chicago O'Hare International to Ontario Flight Information

Flights Arrive in Ontario
Flights Depart from Chicago O'Hare International
Flight Price $144
Distance 1697 miles
Airlines Frontier, United