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Cheap flights from Ontario to Chicago-O'Hare Intl (ONT - ORD)

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The best prices from Ontario to Chicago-O'Hare Intl are usually found in May or July, booked 53 days in advance, depart on a Saturday or Tuesday and return on a Saturday

How to find the cheapest flight from
Ontario (ONT) to Chicago-O'Hare Intl (ORD)

ONT - ORD
Price
$223 - $288
ORD
Temperature
35.6 - 86 °F
ORD
Rainfall
1.5 - 4.8 inches

Popular in

December

High demand for flights, 9% potential price rise

Cheapest in

May

Best time to find cheap flights, 15% potential price drop

Round-trip from

$223

From Ontario to Chicago-O'Hare Intl

One-way from

$120

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

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest day to fly round-trip from Ontario to Chicago-O'Hare Intl?

Saturday flights are found to be more expensive to fly from Ontario to Chicago-O'Hare Intl. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Chicago-O'Hare Intl.

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

Find a great deal and save up to 48% by booking at least 20 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 within the next two weeks, with the cheapest ticket starting at $213.

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

August is one of the best times of the year to fly to Chicago-O'Hare Intl from Ontario. Prices for August average $182 per person but you can even find prices for as low as $64. The most expensive prices can be found in the month of December. Opting for a August flight can save you 34% on your journey compared to booking in August

When is the cheapest time to fly from Ontario to Chicago-O'Hare Intl (ONT - ORD)?

When flying from Ontario to Chicago-O'Hare Intl, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 8% versus a flight at noon.

Cheap flights from Ontario to Chicago-O'Hare Intl in December, January 2021

The best prices found for ONT to ORD flights for December, January
7 Jan - 11 Jan
$68pp
ONT
Ontario
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
ONT
Ontario
15 Jan - 18 Jan
$119pp
ONT
Ontario
Multiple Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Multiple Airlines
   
2 STOPS
ONT
Ontario
21 Jan - 25 Jan
$121pp
ONT
Ontario
Multiple Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Multiple Airlines
   
2 STOPS
ONT
Ontario

Ontario to Chicago-O'Hare Intl 2021 flight deals

Cheap flights to Chicago-O'Hare Intl from Ontario found for this year
11 Dec - 13 Dec
$134pp
ONT
Ontario
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
ONT
Ontario
7 Dec - 10 Dec
$136pp
ONT
Ontario
Multiple Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Multiple Airlines
 
1 STOP
ONT
Ontario
28 Dec - 1 Jan
$147pp
ONT
Ontario
Multiple Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
United Airlines
 
1 STOP
ONT
Ontario

Non-stop flights to Chicago-O'Hare Intl from Ontario

Save time with Ontario to Chicago-O'Hare Intl direct flight deals
24 May - 27 May
$287pp
ONT
Ontario
Frontier
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
Non-Stop
ONT
Ontario
28 May - 31 May
$377pp
ONT
Ontario
Frontier
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
Non-Stop
ONT
Ontario

Last minute flights from Ontario to Chicago-O'Hare Intl

Late deals on round-trip flights to Chicago-O'Hare Intl from Ontario, departing today and this week
11 Dec - 13 Dec
$134pp
ONT
Ontario
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
ONT
Ontario
7 Dec - 10 Dec
$136pp
ONT
Ontario
Multiple Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Multiple Airlines
 
1 STOP
ONT
Ontario
10 Dec - 16 Dec
$166pp
ONT
Ontario
Multiple Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Multiple Airlines
   
2 STOPS
ONT
Ontario

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

The cheapest one-way flights from Ontario to Chicago-O'Hare Intl
9:15 am - 6:47 pm
Alaska Airlines
1 Stop
7h 32m
ONT - ORD
Alaska Airlines
12:30 pm - 12:06 pm
Frontier
1 Stop
21h 36m
ONT - ORD
Frontier
2:07 pm - 4:24 am
Delta
2 Stops
12h 17m
ONT - ORD
Delta
$133
Delta

Related info for your journey

Useful info, stats and facts about Ontario to Chicago-O'Hare Intl flights.

Flight FAQs

From Ontario to Chicago-O'Hare Intl

Are flight prices decreasing from Ontario to Chicago-O'Hare Intl due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Ontario and Chicago-O'Hare Intl for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

What safety measures are being taken by airlines flying from Ontario to Chicago O'Hare Intl to control the spread of COVID-19?

New policies can now be found on Alaska Airlines and Delta to help keep travelers safe while flying. New policies for travelers booking flights from Ontario to Chicago O'Hare Intl include masks being provided and required on board, daily cleaning and sanitization, use of HEPA filters, pre-flight testing for antibodies and symptoms, and socially distanced seating (for a limited time). Keep in mind that policies will vary by airline.

Which airlines flying from Ontario to Chicago O'Hare Intl have flexible cancellations due to COVID-19?

Some of our airline partners flying from Ontario to Chicago O'Hare Intl have new flexible policies in place due to COVID-19. American Airlines, United Airlines, and Delta are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like American Airlines with this kind of flexibility.

Can I find flights from Ontario to Chicago-O'Hare Intl for under $100 on Cheapflights?

Yes, there are multiple flights from Ontario to Chicago-O'Hare Intl for under $100. The cheapest flight booked recently is on Frontier for just $68, but on average you can expect to pay $142.

Are there nonstop flights from Ontario to Chicago-O'Hare Intl for under $300 on Cheapflights?

Cheapflights has at least 2 direct flights from Ontario to Chicago-O'Hare Intl under $300. A good price for a nonstop flight from Ontario to Chicago-O'Hare Intl is less than $332.

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

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

What days are nonstop flights available from Ontario to Chicago-O'Hare Intl?

Nonstop flights are available for this route on the following days: Sunday, Thursday, Friday, Saturday.

Does it rain more in Ontario or Chicago-O'Hare Intl?

Ontario will have less rainfall in 2 compared to Chicago-O'Hare Intl over the next 7 days.

Is Ontario weather warmer or cooler than Chicago-O'Hare Intl?

Temperatures around the 95 °F's can be experienced in July. The weather in Chicago-O'Hare Intl is colder than in Ontario. Plan for potential changes in flight availability as peak weather approaches in this location.

How long is the flight from Ontario to Chicago-O'Hare Intl?

For as low as $178, Frontier can have you in Chicago-O'Hare Intl from Ontario in 6h 49m. This flight may include one or multiple stops.

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

Our cheapest airline available from Ontario to Chicago-O'Hare Intl is Frontier. Our recent data shows that you can find tickets from as low as $68 on this airline. Frontier is 73% cheaper than the average price of flights available within the next 90 days to this destination.

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

The cheapest airlines for a one-way flight from Ontario to Chicago-O'Hare Intl are Frontier ($34), Delta ($93), and Alaska Airlines ($120).

Alternative routes for Ontario to Chicago-O'Hare Intl

Destination information for Chicago-O'Hare Intl

Things to know before you go. Useful info for your trip from Ontario to Chicago-O'Hare Intl
Average temperature for December in Chicago-O'Hare Intl
37.4 °F
Avg rainfall for December in Chicago-O'Hare Intl
1.9 ″

Airports servicing Ontario

Airports servicing Chicago

Top 5 airlines from Ontario to Chicago-O'Hare Intl

The chart below displays the airlines Cheapflights users traveling from Ontario to Chicago-O'Hare Intl choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.

Airline Cheapest Average Flexibility On-time COVID-19 safety
Spirit Airlines
$130 $221 No cancel fee 65%
Frontier
$117 $257 No cancel fee 62%
United Airlines
$122 $280 No cancel fee 69%
Delta
$122 $289 No cancel fee N/A
American Airlines
$122 $327 No cancel fee 71%
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