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O'Hare Intl

$55+ 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 2/6. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — ORD
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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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 Saturday or Thursday and return on a Tuesday

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 January 21, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$158
(Mytrip)

One-way from

$55
(Frontier)

Popular in

November

Cheapest in

September

Average price

$361
Provider with most accurate pricing for Ontario-Chicago O'Hare Intl flight deals.
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Provider most trusted by Cheapflights users for Ontario-Chicago O'Hare Intl flights.
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From Ontario to Chicago O'Hare Intl
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One-way flight from Ontario to Chicago O'Hare Intl
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Highest demand for flights based on searches. 12% potential increase in price ($49 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in January 2025
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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 January 21, 2025.

This Mytrip deal was found by Cheapflights users on 1/21. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/710:40 amONT - ORD
1 stop11h 52mFrontier
Sun 2/96:36 pmORD - ONT
1 stop14h 35mFrontier
Deal found 1/21$158
This American Airlines deal was found by Cheapflights users on 1/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/267:00 amONT - ORD
1 stop8h 34mAmerican Airlines
Sat 5/31:30 pmORD - ONT
1 stop9h 29mAmerican Airlines
Deal found 1/21$247
This Delta deal was found by Cheapflights users on 1/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/207:05 amONT - ORD
1 stop6h 40mDelta
Fri 2/217:20 amORD - ONT
1 stop7h 04mDelta
Deal found 1/20$257
This United Airlines deal was found by Cheapflights users on 1/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/251:40 pmONT - ORD
1 stop5h 48mUnited Airlines
Sat 3/294:00 pmORD - ONT
1 stop7h 59mUnited Airlines
Deal found 1/21$277
This Alaska Airlines deal was found by Cheapflights users on 1/20. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2211:46 amONT - ORD
1 stop10h 13mAlaska Airlines
Wed 4/236:00 amORD - ONT
1 stop11h 32mAlaska Airlines
Deal found 1/20$300
This Southwest deal was found by Cheapflights users on 1/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2112:05 pmONT - ORD
2 stops9h 00mSouthwest
Thu 4/241:30 pmORD - ONT
1 stop8h 00mSouthwest
Deal found 1/21$345

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 2,558,603 searches. Data last updated January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OntarioChicago

ONT - ORD

ONTORD

Ontario

Fri 2/7

10:40 am-12:32 am

1 stop11h 52m

Chicago O'Hare Intl

Sun 2/9

6:36 pm-7:11 am

1 stop14h 35m

$158

OntarioChicago

ONT - ORD

ONTORD

Ontario

Sat 4/26

7:00 am-5:34 pm

1 stop8h 34m

Chicago O'Hare Intl

Sat 5/3

1:30 pm-8:59 pm

1 stop9h 29m

$247

OntarioChicago

ONT - ORD

ONTORD

Ontario

Thu 2/20

7:05 am-3:45 pm

1 stop6h 40m

Chicago O'Hare Intl

Fri 2/21

7:20 am-12:24 pm

1 stop7h 04m

$257

OntarioChicago

ONT - ORD

ONTORD

Ontario

Tue 3/25

1:40 pm-9:28 pm

1 stop5h 48m

Chicago O'Hare Intl

Sat 3/29

4:00 pm-9:59 pm

1 stop7h 59m

$277

OntarioChicago

ONT - ORD

ONTORD

Ontario

Tue 4/22

11:46 am-11:59 pm

1 stop10h 13m

Chicago O'Hare Intl

Wed 4/23

6:00 am-3:32 pm

1 stop11h 32m

$300

OntarioChicago

ONT - ORD

ONTORD

Ontario

Mon 4/21

12:05 pm-11:05 pm

2 stops9h 00m

Chicago O'Hare Intl

Thu 4/24

1:30 pm-7:30 pm

1 stop8h 00m

$345

OntarioChicago

ONT - ORD

ONTORD

Ontario

Thu 2/6

7:56 am-5:25 pm

1 stop7h 29m

$55

OntarioChicago

ONT - ORD

ONTORD

Ontario

Wed 3/12

6:00 am-5:06 pm

1 stop9h 06m

$119

OntarioChicago

ONT - ORD

ONTORD

Ontario

Mon 3/3

7:14 pm-5:53 am

1 stop8h 39m

$123

OntarioChicago

ONT - ORD

ONTORD

Ontario

Wed 2/19

1:05 pm-11:48 pm

1 stop8h 43m

$129

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 12 results
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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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy2 starsTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*1 star
CheapfaremartPrice Accuracy-Trust Score*1 star

*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?

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 January 17, 2025.

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 $320). 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?

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 January 21, 2025.

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.

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 December 16, 2024.

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

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

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

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 January 21, 2025.
Read through reviews of airlines operating flights from Ontario to Chicago, such as Frontier, United Airlines and Alaska Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

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
4,662 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

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
9,706 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

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
8,521 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

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

United Airlines
7.4
Good
8,985 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

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

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Boarding

8.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Food

7.2

Reviews

1 / 10

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

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 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 $158 on this airline. Additional options worth looking into are American Airlines and Delta, starting at $247 and $257 round-trip. Frontier is currently priced 55% 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 $55 on Frontier. Other airlines that offer cheap prices include United Airlines from $119 and Alaska Airlines from $123 one-way.

  • 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 $320). 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

Traveling to a place near Ontario?

Book flights to Ontario if you plan to visit one of these locations
Naperville
Rosemont
Beloit
Racine
Hoffman Estates
Schaumburg
Rockford
Skokie
Tinley Park
Arlington Heights
Northbrook
Evanston
Des Plaines
Orland Park
Merrillville
Kenosha
Lake Geneva
New Buffalo
Gurnee
Willowbrook

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Alternative routes for Ontario to O'Hare Intl

See prices for flight routes from nearby airports that may be better suited for you.
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Top 7 airlines flying from Ontario to O'Hare Intl

Discover the top 7 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 2,558,603 searches. Data last updated January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$92Average$177FlexibilityNo cancel feeOn-time65%
FrontierCheapest$108Average$169FlexibilityNo cancel feeOn-time62%
Alaska AirlinesCheapest$161Average$438FlexibilityNo cancel feeOn-time75%
DeltaCheapest$236Average$351FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$246Average$454FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$247Average$383FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$358Average$508FlexibilityNo cancel feeOn-time63%
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