HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news

$64+ Cheap flights from Ontario (ONT) to O'Hare Intl (ORD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/12. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ORD
Jul 30 — Aug 61
From?
To?
Tue 7/30
Tue 8/6
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Leverage Cheapflights for Your Next Trip

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

The best prices from Ontario to Chicago O'Hare Intl are usually found in April or May, booked 54 days in advance, depart on a Saturday or Wednesday and return on a Saturday

Cheap flight deals from Ontario to O'Hare Intl

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to O'Hare Intl (ORD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 25, 2024.

Popular in

November

Cheapest in

April

Round-trip from

$134
(mytrip.com)

One-way from

$64
(mytrip.com)
High demand for flights, 13% potential price rise
Search Deals
Best time to find cheap flights, 13% potential price drop
Search Deals
From Ontario to Chicago O'Hare Intl
Search Deals
One-way flight from Ontario to Chicago O'Hare Intl
Search Deals

What is the cheapest day to fly round-trip from Ontario to Chicago O'Hare Intl Airport?

Users have found that leaving on a Friday can be a cost-effective option. It’s possible to save up to 26% on your flight compared to booking on days when demand is much higher.

How far in advance should I book a flight from Ontario to Chicago O'Hare Intl Airport?

Find a great deal and save up to 82% by booking at least 31 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Ontario to Chicago O'Hare Intl Airport within the next two weeks, with the cheapest ticket starting at $338.

What is the cheapest month to fly from Ontario to Chicago O'Hare Intl Airport?

January is one of the best times of the year to fly to Chicago O'Hare Intl Airport from Ontario. Prices for January average $305 per person but you can even find prices for as low as $135. The most expensive prices can be found in the month of March. Opting for a January flight can save you 23% on your journey compared to booking in March

What is the cheapest time of day to fly from ONT to ORD?

It’s typically best to fly out from Ontario to Chicago O'Hare Intl Airport in the afternoon. Doing so could potentially save you 23% on the flight price compared to flying in the morning, which is usually more expensive.

Cheap Ontario to O'Hare Intl flights in July & August 2024

Find cheap flight options from Ontario to O'Hare Intl specifically for the months of July and August 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,752,877 searches. Prices were last updated on July 25, 2024.
Check out some of the best flight deals from Ontario to Chicago in 2024. Check back soon for alternative fares.
This mytrip.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure mytrip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/286:00 amONT - ORD
1 stop9h 20mFrontier
Wed 9/46:32 pmORD - ONT
1 stop7h 12mFrontier
Deal found 7/24$134
This mytrip.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure mytrip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/206:31 pmONT - ORD
1 stop15h 48mFrontier
Tue 8/273:24 pmORD - ONT
1 stop23h 18mFrontier
Deal found 7/24$137
This mytrip.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure mytrip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/148:15 pmONT - ORD
1 stop26h 03mFrontier
Wed 8/216:15 amORD - ONT
1 stop19h 24mFrontier
Deal found 7/24$138
This mytrip.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure mytrip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/176:00 amONT - ORD
1 stop13h 23mFrontier
Tue 8/205:24 pmORD - ONT
1 stop15h 53mFrontier
Deal found 7/25$139
This mytrip.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure mytrip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/206:31 pmONT - ORD
1 stop15h 48mFrontier
Thu 9/1210:59 amORD - ONT
1 stop11h 30mFrontier
Deal found 7/25$140
This mytrip.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure mytrip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/246:00 amONT - ORD
1 stop13h 23mFrontier
Sat 8/313:44 pmORD - ONT
1 stop10h 05mFrontier
Deal found 7/25$141
This mytrip.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure mytrip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2112:49 amONT - ORD
1 stop9h 30mFrontier
Tue 8/275:24 pmORD - ONT
1 stop8h 35mFrontier
Deal found 7/25$142
This mytrip.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure mytrip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/148:15 pmONT - ORD
1 stop26h 03mFrontier
Sat 8/173:44 pmORD - ONT
1 stop10h 05mFrontier
Deal found 7/24$143
This Frontier deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2112:49 amONT - ORD
1 stop9h 30mFrontier
Wed 8/286:32 pmORD - ONT
1 stop7h 12mFrontier
Deal found 7/25$144

Ontario to O'Hare Intl 2024 flight deals

Discover exclusive flight deals for travel between Ontario and O'Hare Intl in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,752,877 searches. Data last updated July 25, 2024.
Check out some of the best flight deals from Ontario to Chicago in 2024. Check back soon for alternative fares.
This mytrip.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure mytrip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/286:00 amONT - ORD
1 stop9h 20mFrontier
Wed 9/46:32 pmORD - ONT
1 stop7h 12mFrontier
Deal found 7/24$134
This mytrip.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure mytrip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/245:45 amONT - ORD
1 stop7h 41mFrontier
Wed 10/26:32 pmORD - ONT
1 stop6h 58mFrontier
Deal found 7/24$135
This mytrip.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure mytrip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/206:31 pmONT - ORD
1 stop15h 48mFrontier
Tue 8/273:24 pmORD - ONT
1 stop23h 18mFrontier
Deal found 7/24$137
This mytrip.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure mytrip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/175:45 amONT - ORD
1 stop7h 41mFrontier
Sat 9/214:36 pmORD - ONT
1 stop9h 23mFrontier
Deal found 7/24$138
This mytrip.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure mytrip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/176:00 amONT - ORD
1 stop13h 23mFrontier
Tue 8/205:24 pmORD - ONT
1 stop15h 53mFrontier
Deal found 7/25$139
This Frontier deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/312:59 amONT - ORD
1 stop9h 20mFrontier
Thu 9/53:26 pmORD - ONT
1 stop7h 03mFrontier
Deal found 7/25$140
This mytrip.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure mytrip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/246:00 amONT - ORD
1 stop13h 23mFrontier
Sat 8/313:44 pmORD - ONT
1 stop10h 05mFrontier
Deal found 7/25$141
This mytrip.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure mytrip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2112:49 amONT - ORD
1 stop9h 30mFrontier
Tue 8/275:24 pmORD - ONT
1 stop8h 35mFrontier
Deal found 7/25$142
This mytrip.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure mytrip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/148:15 pmONT - ORD
1 stop26h 03mFrontier
Sat 8/173:44 pmORD - ONT
1 stop10h 05mFrontier
Deal found 7/24$143

Ontario to O'Hare Intl flights leaving soon

Find last-minute flight options from Ontario to O'Hare Intl for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,752,877 searches. Data last updated July 25, 2024.
Have a look at some of the last-minute flights available departing from Ontario to Chicago. Users should be sure to double check the price, date, and time of their last-minute flight.
This mytrip.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure mytrip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/38:08 pmONT - ORD
1 stop7h 18mFrontier
Wed 8/146:32 pmORD - ONT
1 stop7h 12mFrontier
Deal found 7/24$169
This Gotogate deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/38:08 pmONT - ORD
1 stop7h 18mFrontier
Wed 8/146:32 pmORD - ONT
1 stop7h 12mFrontier
Deal found 7/24$170
This Gotogate deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/49:10 pmONT - ORD
1 stop6h 33mFrontier
Wed 8/146:32 pmORD - ONT
1 stop7h 12mFrontier
Deal found 7/24$171
This mytrip.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure mytrip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/310:30 pmONT - ORD
1 stop29h 13mFrontier
Sat 8/108:21 pmORD - ONT
1 stop12h 42mFrontier
Deal found 7/24$176
This Gotogate deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/33:14 pmONT - ORD
1 stop12h 12mFrontier
Sat 8/108:21 pmORD - ONT
1 stop12h 42mFrontier
Deal found 7/24$177
This mytrip.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure mytrip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/47:10 pmONT - ORD
1 stop8h 33mFrontier
Sat 8/108:21 pmORD - ONT
1 stop12h 42mFrontier
Deal found 7/24$179
This Gotogate deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/49:10 pmONT - ORD
1 stop6h 33mFrontier
Sat 8/108:21 pmORD - ONT
1 stop12h 42mFrontier
Deal found 7/24$180
This mytrip.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure mytrip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/38:08 pmONT - ORD
1 stop7h 18mFrontier
Thu 8/159:52 pmORD - ONT
1 stop11h 25mFrontier
Deal found 7/24$183
This mytrip.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure mytrip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/47:10 pmONT - ORD
1 stop8h 33mFrontier
Fri 8/163:44 pmORD - ONT
1 stop10h 06mFrontier
Deal found 7/24$190

One-way flights to O'Hare Intl from Ontario

Search for one-way flight options from Ontario to O'Hare Intl. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,752,877 searches. Data last updated July 25, 2024.
Users traveling one-way from Ontario to Chicago can select one of these great deals. Users in need of a round-trip flight from Ontario to Chicago instead should update the search form at the top of page.
This mytrip.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure mytrip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/128:35 pmONT - ORD
1 stop6h 12mFrontier
Deal found 7/24$64
This mytrip.com deal was found by Cheapflights users on 7/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure mytrip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/128:35 pmONT - ORD
1 stop6h 12mFrontier
Deal found 7/23$68
This mytrip.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure mytrip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/85:45 amONT - ORD
1 stop6h 26mFrontier
Deal found 7/24$69
This mytrip.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure mytrip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/2512:59 amONT - ORD
1 stop6h 43mFrontier
Deal found 7/25$70
This mytrip.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure mytrip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1612:39 amONT - ORD
1 stop20h 49mFrontier
Deal found 7/24$71
This mytrip.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure mytrip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/233:46 pmONT - ORD
1 stop5h 53mFrontier
Deal found 7/25$72
This FlightNetwork deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightNetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1812:59 amONT - ORD
1 stop6h 53mFrontier
Deal found 7/24$73
This mytrip.com deal was found by Cheapflights users on 7/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure mytrip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1612:39 amONT - ORD
1 stop20h 49mFrontier
Deal found 7/25$74
This mytrip.com deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure mytrip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/316:31 pmONT - ORD
1 stop15h 48mFrontier
Deal found 7/24$75

Find flights from Ontario to O'Hare Intl within your budget

Customize your flight search to find flights from Ontario to O'Hare Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,752,877 searches. Data last updated July 25, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$134 - $275

Route

Depart

Return

Price

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

Wed 8/28

1 stop9h 20m

Chicago O'Hare Intl

Wed 9/4

1 stop7h 12m

$134

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

Tue 9/24

1 stop7h 41m

Chicago O'Hare Intl

Wed 10/2

1 stop6h 58m

$135

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

Tue 8/20

1 stop15h 48m

Chicago O'Hare Intl

Tue 8/27

1 stop23h 18m

$137

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

Tue 9/17

1 stop7h 41m

Chicago O'Hare Intl

Sat 9/21

1 stop9h 23m

$138

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

Sat 8/17

1 stop13h 23m

Chicago O'Hare Intl

Tue 8/20

1 stop15h 53m

$139

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

Tue 8/20

1 stop15h 48m

Chicago O'Hare Intl

Thu 9/12

1 stop11h 30m

$140

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

Wed 10/16

1 stop6h 12m

Chicago O'Hare Intl

Tue 10/22

2 stops11h 47m

$241

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

Sat 8/24

1 stop6h 06m

Chicago O'Hare Intl

Tue 8/27

1 stop6h 29m

$256

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

Mon 9/9

1 stop10h 12m

Chicago O'Hare Intl

Sat 9/14

2 stops10h 02m

$275

Flights are sorted by cheapest first

Deals found on 7/24

How far ahead should I book a flight from Ontario to Chicago O'Hare Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to O'Hare Intl. Price data was last updated on July 23, 2024.
The price you pay for your flight from Ontario to Chicago O'Hare Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 54 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Search Deals

What is the cheapest day to fly from Ontario to Chicago O'Hare Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Ontario to O'Hare Intl. Price data was last updated on July 21, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Ontario to Chicago O'Hare Intl Airport flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Best time to book a flight from Ontario to O'Hare Intl

Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Temperature and rainfall in O'Hare Intl by month

Plan your trip to O'Hare Intl by taking into account the average temperature and rainfall totals by month.

CHI

Temperature

23 - 73.4 °F

If weather is an important factor for your trip to Chicago O'Hare Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing O'Hare Intl

Get insights into the airlines that provide service to O'Hare Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to O'Hare Intl. Reviews last updated July 25, 2024.
Read through reviews of airlines operating flights from Ontario to Chicago, such as Frontier, Delta and Alaska Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
9,365 reviews

Entertainment

7.2

Boarding

8.2

Food

7.2

Overall

8.1

Comfort

7.9

Crew

8.6

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Alaska Airlines
8.1
Very good
9,365 reviews
Alaska Airlines
8.1
Very good
9,365 reviews

Entertainment

7.2

Boarding

8.2

Food

7.2

Overall

8.1

Comfort

7.9

Crew

8.6

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Delta
8.0
Very good
9,630 reviews
Alaska Airlines
8.1
Very good
9,365 reviews

Entertainment

7.2

Boarding

8.2

Food

7.2

Overall

8.1

Comfort

7.9

Crew

8.6

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

JetBlue
7.6
Good
3,996 reviews
Alaska Airlines
8.1
Very good
9,365 reviews

Entertainment

7.2

Boarding

8.2

Food

7.2

Overall

8.1

Comfort

7.9

Crew

8.6

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

United Airlines
7.4
Good
10,000 reviews
Alaska Airlines
8.1
Very good
9,365 reviews

Entertainment

7.2

Boarding

8.2

Food

7.2

Overall

8.1

Comfort

7.9

Crew

8.6

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

American Airlines
7.3
Good
10,000 reviews
Alaska Airlines
8.1
Very good
9,365 reviews

Entertainment

7.2

Boarding

8.2

Food

7.2

Overall

8.1

Comfort

7.9

Crew

8.6

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Related info for your journey

Find useful and relevant information for your journey from Ontario to O'Hare Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Chicago O'Hare Intl?

    Located just 3.1 mi from the city center, Ontario is the airport most travelers will use when flying to Chicago O'Hare Intl from Ontario. Booking flights from Ontario (ONT) to Chicago O'Hare Intl should be relatively easy as there are 0 daily outbound flights to Chicago O'Hare Intl from 5 different airlines.

  • Can I find flights from Ontario to Chicago O'Hare Intl Airport for under $200 on Cheapflights?

    Yes, there are multiple flights from Ontario to Chicago O'Hare Intl Airport for under $200. The cheapest flight booked recently is on Frontier for just $134, but on average you can expect to pay $144.

  • Are there last-minute flights available from Ontario to Chicago O'Hare Intl Airport for under $200?

    There are currently 20+ open flights from Ontario to Chicago O'Hare Intl Airport within the next 7 days for less than $200.

  • What is the cheapest airline to fly from Ontario to Chicago O'Hare Intl Airport round-trip?

    Our cheapest airline available from Ontario to Chicago O'Hare Intl Airport is Frontier. Our recent data shows that you can find tickets from as low as $134 on this airline. Frontier is currently priced 62% below the average price you’ll pay for this route.

  • What does ONT to ORD mean?

    ONT stands for Ontario Airport, while ORD stands for Chicago O'Hare Intl Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry.

  • Can I find deals for flights from Ontario to O'Hare Intl that include extra baggage allowance?

    The amount of baggage you can bring on your Ontario to O'Hare Intl flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Ontario to O'Hare Intl with specific airlines?

    Yes, Cheapflights allows you to browse and filter Ontario to O'Hare Intl flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Ontario to O'Hare Intl that include hotel bookings?

    Yes. In addition to deals on Ontario to O'Hare Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to O'Hare Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to O'Hare Intl.

  • Can I find deals for business class flights from Ontario to O'Hare Intl?

    Yes. Cheapflights offers flight deals from Ontario to O'Hare Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Ontario to O'Hare Intl that allow pets onboard?

    Many airlines flying from Ontario to O'Hare Intl offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Ontario to O'Hare Intl?

    Yes, you can often find last-minute deals on Ontario to O'Hare Intl flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Ontario to Chicago O'Hare Intl Airport flight deals updated?

    The Ontario to Chicago O'Hare Intl Airport flight deals you see on this page were last updated on 7/25.

  • What are the most popular airlines that fly from Ontario to Chicago O'Hare Intl Airport?

    When booking a flight from Ontario to Chicago O'Hare Intl Airport, you may want to consider flying on American Airlines, Delta or Frontier as they are the most popular for this route.

  • What is the cheapest month to book a flight from Ontario to Chicago O'Hare Intl Airport?

    Currently, February is the cheapest month in which you can book a flight from Ontario to Chicago O'Hare Intl Airport (average of $245). Flying from Ontario to Chicago O'Hare Intl Airport in June is currently the most expensive (average of $308). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to O'Hare Intl
See prices for flight routes from nearby airports that may be better suited for you.

Los Angeles to O'Hare Intl flights
San Francisco to O'Hare Intl flights
Burbank to O'Hare Intl flights
San Francisco to Midway flights
Los Angeles to Midway flights
Santa Ana to O'Hare Intl flights
Oakland to O'Hare Intl flights
San Diego to O'Hare Intl flights
Las Vegas to O'Hare Intl flights
San Jose to O'Hare Intl flights
Ontario to Midway flights
San Diego to Midway flights
San Jose to Midway flights
Sacramento to O'Hare Intl flights
Santa Ana to Midway flights
Las Vegas to Midway flights
Sacramento to Midway flights
Palm Springs to O'Hare Intl flights
Los Angeles to Rockford flights
Fresno to O'Hare Intl flights
Long Beach to O'Hare Intl flights
Oakland to Midway flights
Burbank to Midway flights
Reno to O'Hare Intl flights
Reno to Midway flights
Fresno to Midway flights
Medford to O'Hare Intl flights
Santa Barbara to O'Hare Intl flights
Palm Springs to Midway flights
San Jose to Rockford flights
Oakland to Rockford flights
Santa Rosa to O'Hare Intl flights
Long Beach to Midway flights
Medford to Midway flights
San Diego to Rockford flights
San Luis Obispo to O'Hare Intl flights
Monterey to O'Hare Intl flights
Sacramento to Rockford flights
Bakersfield to O'Hare Intl flights
Las Vegas to Rockford flights
Burbank to Rockford flights
Arcata to O'Hare Intl flights
Redding to O'Hare Intl flights
Tijuana to Midway flights
Tijuana to O'Hare Intl flights
Bakersfield to Midway flights
Ontario to Rockford flights
Yuma to O'Hare Intl flights

Top 5 airlines flying from Ontario to O'Hare Intl

Discover the top 5 airlines that operate flights from Ontario to O'Hare Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,752,877 searches. Data last updated July 25, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$93Average$176FlexibilityNo cancel feeOn-time65%
FrontierCheapest$143Average$206FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$260Average$400FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$274Average$443FlexibilityNo cancel feeOn-time69%
DeltaCheapest$276Average$364FlexibilityNo cancel feeOn-timeN/A
Charlotte to Dallas flights
Cincinnati to Chicago flights
Jamaica to England flights
New York to Tel Aviv flights
Denver to London flights
Los Angeles to El Salvador flights
Atlanta to Phoenix flights
Phoenix to Austin flights
USA to Bora Bora flights
San Francisco to Vancouver flights
Seattle to Denver flights
Ontario to Norfolk flights

Search flights from Ontario to O'Hare Intl by cabin class

Find flights from Ontario to O'Hare Intl, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

Book a flight to one of these trending destinations

User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations
Flights to Abha
Flights to Komatsu
Flights to Skardu
Flights to Laayoune Hassan I
Flights to Aqaba King Hussein Intl
Flights to Nampula
Flights to Bourgas
Flights to Riverton
Flights to Alpena Phelps/Collins
Flights to Palmas
Flights to Newport State
Flights to Antofagasta Cerro Moreno
Flights to Nuku‘alofa Fua'Amotu Intl
Flights to Ndola
Flights to Fort Dodge
Flights to Miri
Flights to Rhinelander Oneida County
Flights to Seattle Lake Union Spb
Flights to Portsmouth Pease Intl
Flights to Tumbes
Flights to Jigiga
Flights to Diyarbakir
Flights to Akureyri
Flights to Brainerd Crow Wing County
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
View all available airlines