What are the cheapest airlines flying 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 $135 on this airline. Additional options worth looking into are United Airlines and American Airlines, starting at $227 and $247 round-trip. Frontier is currently priced 61% below the average price you’ll pay for this route.

What are the cheapest airlines to fly from Ontario to Chicago O'Hare Intl Airport one-way?

One-way options have recently been found by users for as low as $38 on Frontier. Other airlines that offer cheap prices include United Airlines from $114 and Delta from $134 one-way.

What are the cheapest flights from Ontario to Chicago O'Hare Intl Airport?

On average you can expect to pay $245 for a flight from Ontario to Chicago O'Hare Intl Airport. The cheapest flight overall is $113 while the most popular route, (Ontario - Chicago O'Hare Intl) is currently priced at $125.

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, Alaska Airlines or Delta as they are the most popular for this route.

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

Users have found that leaving on a Wednesday can be a cost-effective option. It’s possible to save up to 16% 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 74% 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 $327.

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

October is one of the best times of the year to fly to Chicago O'Hare Intl Airport from Ontario. Prices for October average $311 per person but you can even find prices for as low as $98. The most expensive prices can be found in the month of March. Opting for a October flight can save you 19% on your journey compared to booking in March

Most accurate provider : When it comes to deals on Ontario-Chicago O'Hare Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Chicago O'Hare Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Chicago O'Hare Intl Airport flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Ontario-Chicago O'Hare Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Chicago O'Hare Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 7 different 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.

$38+ Save on Flights from Ontario to Chicago O'Hare Intl Airport

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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”

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The best prices from Ontario to Chicago O'Hare Intl are usually found in September or October, booked 80 days in advance, depart on a Tuesday or Monday and return on a Tuesday

Cheap flight deals from Ontario to O'Hare Intl

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$135 (Booking.com)
One-way from	$38 (Trip.com)
Popular in	November
Cheapest in	September
Average price	$326
Good round-trip deal	$269 or less
Good one-way deal	$158 or less

Provider with most accurate pricing for Ontario-Chicago O'Hare Intl flight deals.

Search Deals

Provider most trusted by Cheapflights users for Ontario-Chicago O'Hare Intl flights.

Search Deals

From Ontario to Chicago O'Hare Intl

Search Deals

One-way flight from Ontario to Chicago O'Hare Intl

Search Deals

Highest demand for flights based on searches. 12% potential increase in price ($49 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($15 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in February 2025

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Price to beat on a round-trip flight from Ontario to Chicago O'Hare Intl.

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Price to beat on a one-way flight from Ontario to Chicago O'Hare Intl.

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Find flight deals from Ontario to O'Hare Intl

Cheapest flights from Ontario to O'Hare Intl
Explore the most affordable flight options available from Ontario to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.

Fri 3/712:59 amONT - ORD

1 stop10h 21mFrontier

Tue 3/116:45 amORD - ONT

1 stop19h 19mFrontier

Deal found 2/19

$135

Sat 6/217:00 amONT - ORD

Nonstop3h 58mUnited Airlines

Tue 6/248:20 pmORD - ONT

Nonstop4h 31mUnited Airlines

Deal found 2/18

$227

Tue 5/611:46 amONT - ORD

1 stop10h 13mMultiple Airlines

Thu 5/87:00 amORD - ONT

1 stop12h 47mMultiple Airlines

Deal found 2/19

$229

Tue 5/612:46 pmONT - ORD

1 stop6h 23mAmerican Airlines

Sat 5/107:00 amORD - ONT

1 stop6h 54mAmerican Airlines

Deal found 2/19

$247

Wed 4/235:15 pmONT - ORD

1 stop5h 38mDelta

Mon 4/287:50 amORD - ONT

1 stop8h 05mDelta

Deal found 2/20

$257

Thu 10/3011:30 amONT - ORD

1 stop10h 29mAlaska Airlines

Thu 11/610:00 amORD - ONT

1 stop10h 17mAlaska Airlines

Deal found 2/19

$303

Best flights from Ontario to O'Hare Intl
Discover carefully curated flight deals from Ontario to O'Hare Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 20, 2025.

Fri 3/712:59 amONT - ORD

1 stop10h 21mFrontier

Tue 3/116:45 amORD - ONT

1 stop19h 19mFrontier

Deal found 2/19

$135

Thu 4/246:24 pmONT - ORD

1 stop9h 41mMultiple Airlines

Mon 4/2811:41 amORD - ONT

1 stop7h 43mMultiple Airlines

Deal found 2/19

$224

Sat 6/217:00 amONT - ORD

Nonstop3h 58mUnited Airlines

Tue 6/248:20 pmORD - ONT

Nonstop4h 31mUnited Airlines

Deal found 2/18

$227

Wed 3/267:35 pmONT - ORD

1 stop7h 33mAmerican Airlines

Sun 3/305:00 amORD - ONT

1 stop7h 07mAmerican Airlines

Deal found 2/19

$247

Wed 4/235:15 pmONT - ORD

1 stop5h 38mDelta

Mon 4/287:50 amORD - ONT

1 stop8h 05mDelta

Deal found 2/20

$257

Thu 4/246:24 pmONT - ORD

1 stop9h 41mAlaska Airlines

Sat 4/266:00 amORD - ONT

1 stop16h 29mAlaska Airlines

Deal found 2/20

$291

Sat 4/126:10 amONT - ORD

1 stop8h 15mSouthwest

Mon 4/1412:40 pmORD - ONT

2 stops9h 20mSouthwest

Deal found 2/19

$297

Last-minute flights from Ontario to O'Hare Intl
Discover last-minute flight deals from Ontario to O'Hare Intl. Data last updated February 20, 2025 and is based on user searches.

Tue 2/256:00 amONT - ORD

1 stop6h 55mUnited Airlines

Wed 2/262:00 pmORD - ONT

1 stop9h 59mUnited Airlines

Deal found 2/20

$610

Wed 2/264:09 pmONT - ORD

1 stop17h 45mFrontier

Wed 3/510:56 amORD - ONT

1 stop9h 02mFrontier

Deal found 2/19

$137

Thu 2/277:14 pmONT - ORD

1 stop8h 39mHawaiian Airlines

Sun 3/210:00 amORD - ONT

1 stop10h 19mHawaiian Airlines

Deal found 2/20

$680

Sat 3/16:00 amONT - ORD

2 stops9h 29mDelta

Wed 3/127:30 amORD - ONT

1 stop11h 12mDelta

Deal found 2/19

$396

Sat 3/18:29 pmONT - ORD

1 stop6h 36mMultiple Airlines

Tue 3/47:45 amORD - ONT

2 stops11h 14mMultiple Airlines

Deal found 2/19

$403

Sat 3/111:45 amONT - ORD

2 stops10h 14mAlaska Airlines

Mon 3/315:53 pmORD - ONT

1 stop8h 06mAlaska Airlines

Deal found 2/19

$510

Sat 3/16:50 amONT - ORD

2 stops10h 50mSouthwest

Tue 3/45:45 amORD - ONT

2 stops9h 40mSouthwest

Deal found 2/19

$529

Fri 3/712:59 amONT - ORD

1 stop10h 21mFrontier

Tue 3/116:45 amORD - ONT

1 stop19h 19mFrontier

Deal found 2/19

$135

Sat 3/811:30 amONT - ORD

2 stops8h 30mSouthwest

Mon 3/106:00 amORD - ONT

1 stop6h 30mSouthwest

Deal found 2/20

$367

Tue 3/186:00 amONT - ORD

1 stop10h 00mAlaska Airlines

Wed 3/197:16 pmORD - ONT

1 stop30h 43mAlaska Airlines

Deal found 2/20

$371

Fri 3/215:30 pmONT - ORD

2 stops13h 48mDelta

Mon 3/247:15 pmORD - ONT

1 stop6h 41mDelta

Deal found 2/19

$262

Tue 3/256:00 amONT - ORD

1 stop9h 55mMultiple Airlines

Mon 3/317:50 amORD - ONT

1 stop11h 53mMultiple Airlines

Deal found 2/20

$273

One-way flights from Ontario to O'Hare Intl
Search for one-way flight options from Ontario to O'Hare Intl. Find affordable one-way fares based on user searches. Data last updated February 20, 2025.

Mon 3/1712:59 amONT - ORD

1 stop21h 24mFrontier

Deal found 2/19

$38

Fri 6/277:00 amONT - ORD

Nonstop4h 03mUnited Airlines

Deal found 2/20

$114

Wed 4/1610:15 pmONT - ORD

2 stops9h 09mDelta

Deal found 2/19

$134

Tue 4/296:00 amONT - ORD

1 stop22h 05mAlaska Airlines

Deal found 2/20

$137

Wed 3/126:00 amONT - ORD

1 stop6h 01mAmerican Airlines

Deal found 2/19

$145

Sat 6/286:20 amONT - ORD

1 stop6h 40mSouthwest

Deal found 2/19

$160

Tue 3/256:00 amONT - ORD

1 stop8h 53mHawaiian Airlines

Deal found 2/20

$187

Fri 5/1610:40 pmONT - ORD

1 stop11h 37mJetBlue

Deal found 2/19

$221

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

Fly from

Fly to

Route

Depart

Return

Price

OntarioChicago

ONT - ORD

ONTORD

Ontario

Fri 3/7

12:59 am-1:20 pm

1 stop10h 21m

Chicago O'Hare Intl

Tue 3/11

6:45 am-12:04 am

1 stop19h 19m

$135

OntarioChicago

ONT - ORD

ONTORD

Ontario

Thu 4/24

6:24 pm-6:05 am

1 stop9h 41m

Chicago O'Hare Intl

Mon 4/28

11:41 am-5:24 pm

1 stop7h 43m

$224

OntarioChicago

ONT - ORD

ONTORD

Ontario

Sat 6/21

7:00 am-12:58 pm

Nonstop3h 58m

Chicago O'Hare Intl

Tue 6/24

8:20 pm-10:51 pm

Nonstop4h 31m

$227

OntarioChicago

ONT - ORD

ONTORD

Ontario

Wed 3/26

7:35 pm-5:08 am

1 stop7h 33m

Chicago O'Hare Intl

Sun 3/30

5:00 am-10:07 am

1 stop7h 07m

$247

OntarioChicago

ONT - ORD

ONTORD

Ontario

Wed 4/23

5:15 pm-12:53 am

1 stop5h 38m

Chicago O'Hare Intl

Mon 4/28

7:50 am-1:55 pm

1 stop8h 05m

$257

OntarioChicago

ONT - ORD

ONTORD

Ontario

Thu 4/24

6:24 pm-6:05 am

1 stop9h 41m

Chicago O'Hare Intl

Sat 4/26

6:00 am-8:29 pm

1 stop16h 29m

$291

OntarioChicago

ONT - ORD

ONTORD

Ontario

Sat 4/12

6:10 am-4:25 pm

1 stop8h 15m

Chicago O'Hare Intl

Mon 4/14

12:40 pm-8:00 pm

2 stops9h 20m

$297

OntarioChicago

ONT - ORD

ONTORD

Ontario

Mon 3/17

12:59 am-12:23 am

1 stop21h 24m

$38

OntarioChicago

ONT - ORD

ONTORD

Ontario

Fri 6/27

7:00 am-1:03 pm

Nonstop4h 03m

$114

OntarioChicago

ONT - ORD

ONTORD

Ontario

Wed 4/16

10:15 pm-9:24 am

2 stops9h 09m

$134

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 15 results

Compare providers for flights from Ontario to O'Hare Intl

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to O'Hare Intl in February.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
Priceline	Price Accuracy1 star	Trust Score*3 stars
Kiwi.com	Price Accuracy3 stars	Trust Score*2 stars
Mytrip	Price Accuracy3 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy3 stars	Trust Score*2 stars
Cheapfaremart	Price Accuracy-	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Ontario-Chicago O'Hare Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Chicago O'Hare Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Chicago O'Hare Intl Airport flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Ontario-Chicago O'Hare Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Chicago O'Hare Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

Travel insights for flights from Ontario to O'Hare Intl

Get recent, data-driven insights about flights from Ontario to O'Hare Intl including ideal travel times, pricing trends, and more.

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

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 80 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, August 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 March is currently the most expensive (average of $321). 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.

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 21% on the flight price compared to flying at noon, which is usually more expensive.

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

Travelers seeking maximum savings on their Ontario to Chicago O'Hare Intl Airport flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in O'Hare Intl by month

In terms of precipitation, rainfall in Chicago O'Hare Intl Airport ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Chicago O'Hare Intl Airport when rainfall is around 1.7 in.

Temperature in O'Hare Intl by month

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

Read through reviews of airlines operating flights from Ontario to Chicago, such as Southwest, Alaska Airlines and Delta. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.1

Very good

4,411 reviews

Reviews

1 / 20

10.0

Excellent

Arlene,May 2024

SAN - OAK

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Southwest

8.1

Very good

4,411 reviews

Southwest

8.1

Very good

4,411 reviews

Reviews

1 / 20

10.0

Excellent

Arlene,May 2024

SAN - OAK

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Alaska Airlines

8.0

Very good

9,697 reviews

Southwest

8.1

Very good

4,411 reviews

Reviews

1 / 20

10.0

Excellent

Arlene,May 2024

SAN - OAK

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Delta

8.0

Very good

8,219 reviews

Southwest

8.1

Very good

4,411 reviews

Reviews

1 / 20

10.0

Excellent

Arlene,May 2024

SAN - OAK

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Hawaiian Airlines

7.9

Good

2,317 reviews

Southwest

8.1

Very good

4,411 reviews

Reviews

1 / 20

10.0

Excellent

Arlene,May 2024

SAN - OAK

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

JetBlue

7.4

Good

3,070 reviews

Southwest

8.1

Very good

4,411 reviews

Reviews

1 / 20

10.0

Excellent

Arlene,May 2024

SAN - OAK

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Related info for your journey

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 7 different airlines.
What are the cheapest airlines flying 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 $135 on this airline. Additional options worth looking into are United Airlines and American Airlines, starting at $227 and $247 round-trip. Frontier is currently priced 61% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from Ontario to Chicago O'Hare Intl Airport one-way?
One-way options have recently been found by users for as low as $38 on Frontier. Other airlines that offer cheap prices include United Airlines from $114 and Delta from $134 one-way.
What are the cheapest flights from Ontario to Chicago O'Hare Intl Airport?
On average you can expect to pay $245 for a flight from Ontario to Chicago O'Hare Intl Airport. The cheapest flight overall is $113 while the most popular route, (Ontario - Chicago O'Hare Intl) is currently priced at $125.
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.
What is the cheapest month to book a flight from Ontario to Chicago O'Hare Intl Airport?
Currently, August 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 March is currently the most expensive (average of $321). 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.

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Top 7 airlines flying from Ontario to O'Hare Intl

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$74	Average$177	FlexibilityNo cancel fee	On-time65%
Frontier	Cheapest$109	Average$168	FlexibilityNo cancel fee	On-time62%
Alaska Airlines	Cheapest$161	Average$438	FlexibilityNo cancel fee	On-time75%
Delta	Cheapest$236	Average$338	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$246	Average$455	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$246	Average$383	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$345	Average$485	FlexibilityNo cancel fee	On-time63%

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$38+ 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 3/17. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ontario to O'Hare Intl with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

The best prices from Ontario to Chicago O'Hare Intl are usually found in September or October, booked 80 days in advance, depart on a Tuesday or Monday and return on a Tuesday

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Find flight deals from Ontario to O'Hare Intl

Cheapest flights from Ontario to O'Hare IntlExplore the most affordable flight options available from Ontario to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.

Explore the most affordable flight options available from Ontario to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.

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

Compare providers for flights from Ontario to O'Hare Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to O'Hare Intl in February.

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.

Travel insights for flights from Ontario to O'Hare Intl

Get recent, data-driven insights about flights from Ontario to O'Hare Intl including ideal travel times, pricing trends, and more.

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 February 14, 2025.

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

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

Find hourly flight availability from Ontario to O'Hare Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 20, 2025.

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 February 16, 2025.

Rainfall in O'Hare Intl by month

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

Temperature in O'Hare Intl by month

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

Reviews of airlines servicing O'Hare Intl

Read through reviews of airlines operating flights from Ontario to Chicago, such as Southwest, Alaska Airlines and Delta. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

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?

What are the cheapest airlines flying from Ontario to Chicago O'Hare Intl Airport round-trip?

What are the cheapest airlines to fly from Ontario to Chicago O'Hare Intl Airport one-way?

What are the cheapest flights from Ontario to Chicago O'Hare Intl Airport?

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

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

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

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

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Alternative routes for Ontario to O'Hare Intl

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Top 7 airlines flying from Ontario to O'Hare Intl

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Cheapest flights from Ontario to O'Hare Intl
Explore the most affordable flight options available from Ontario to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.