Cheap flights from Ontario to Chicago (ONT - CHI)
The best prices from Ontario to Chicago are usually found in July or August, booked 60 days in advance, depart on a Tuesday or Saturday and return on a Saturday
How to find the cheapest flight from Ontario to Chicago
All the information you need to plan the best ONT to CHI flight in 2022: compare Ontario to Chicago flight prices with the expected peak season, weather and rainfall in Chicago.
ONT - CHI | Price | $245 - $312 |
CHI | Temperature | 23 - 73.4 °F |
CHI | Precipitation | 1.7 - 4.9 inches |
Popular in
December
High demand for flights, 13% potential price rise
Cheapest in
July
Best time to find cheap flights, 9% potential price drop
Round-trip from
$245
From Ontario to Chicago (CHI)
One-way from
$98
One-way flight from Ontario to Chicago (CHI)
What is the cheapest day to fly round-trip from Ontario to Chicago?
Departing on a Monday is a good option for securing a great price. You can expect to save up to 41% when planning your travel around this day of the week.
How far in advance should I book a flight from Ontario to Chicago?
When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 16 days in advance, which can save you up to 4% on flights from Ontario to Chicago compared to booking the week you need them. Waiting 16 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $175. For sooner than that we have options available in the next 3 days from $186.
What is the cheapest month to fly from Ontario to Chicago?
Due to multiple factors, expect to potentially pay more when booking in December. For low rates, August can be a great choice for travel to Chicago. Flights to Chicago from Ontario in August are about $184 on average during August, but can be found for as low as $50.
When is the cheapest time to fly from Ontario to Chicago (ONT - CHI)?
Unlike in the morning, when flights are generally more expensive, you can save up to 13% on flights from Ontario to Chicago by exploring options for tickets at noon.
Cheap flights from Ontario to Chicago in January, February 2022
The best prices found for ONT to CHI flights for January, February
Ontario
Chicago O'Hare Intl
1 stop
6h 00mChicago O'Hare Intl
Ontario
1 stop
13h 01mFrontier
Ontario
Chicago O'Hare Intl
1 stop
19h 01mChicago O'Hare Intl
Ontario
1 stop
12h 36mFrontier
Ontario
Chicago O'Hare Intl
1 stop
6h 54mChicago O'Hare Intl
Ontario
1 stop
11h 56mFrontier
Ontario to Chicago 2022 flight deals
Cheap flights to Chicago from Ontario found for this year
Ontario
Chicago O'Hare Intl
Nonstop
3h 58mChicago O'Hare Intl
Ontario
Nonstop
4h 18mFrontier
Ontario
Chicago O'Hare Intl
Nonstop
3h 58mChicago O'Hare Intl
Ontario
1 stop
12h 29mFrontier
Ontario
Chicago O'Hare Intl
1 stop
15h 33mChicago O'Hare Intl
Ontario
1 stop
12h 38mFrontier
Non-stop flights to Chicago from Ontario
Save time with Ontario to Chicago direct flight deals
Ontario
Chicago O'Hare Intl
Nonstop
3h 58mChicago O'Hare Intl
Ontario
Nonstop
4h 18mFrontier
Ontario
Chicago O'Hare Intl
Nonstop
3h 58mChicago O'Hare Intl
Ontario
Nonstop
4h 18mFrontier
Ontario
Chicago O'Hare Intl
Nonstop
3h 58mChicago O'Hare Intl
Ontario
Nonstop
4h 18mFrontier
Last minute flights from Ontario to Chicago
Late deals on return flights to Chicago from Ontario, departing today and this week
Ontario
Chicago O'Hare Intl
1 stop
15h 33mChicago O'Hare Intl
Ontario
1 stop
12h 38mFrontier
Ontario
Chicago O'Hare Intl
1 stop
5h 58mChicago O'Hare Intl
Ontario
1 stop
12h 01mMultiple Airlines
Ontario
Chicago O'Hare Intl
1 stop
6h 38mChicago O'Hare Intl
Ontario
1 stop
12h 36mFrontier
One-way flights to Chicago All airports from Ontario
The cheapest one-way flights from Ontario to Chicago
Ontario
Chicago O'Hare Intl
Nonstop
3h 58mFrontier
Ontario
Chicago Greater Rockford
1 stop
11h 02mMultiple Airlines
Ontario
Chicago O'Hare Intl
1 stop
6h 54mFrontier
Related info for your journey
Useful info, stats and facts about Ontario to Chicago flights.
What airport do you fly from for flights from Ontario to Chicago?
Ontario (ONT) is the airport you will fly out of if you book a flight from Ontario to Chicago. You should not have trouble finding flights to Chicago from Ontario; the airport handles an average of 0 outbound flights to Chicago per day. You should also have plenty of airline options to choose from since 8 airlines have flights from the Ontario airport to Chicago. It is only a 3.1 mi journey to Ontario (ONT) from Ontario’s city center.
Which airlines flying from Ontario to Chicago have flexible cancellations due to COVID-19?
Some of our airline partners flying from Ontario to Chicago 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 for under $100 on Cheapflights?
Yes, there are multiple flights from Ontario to Chicago for under $100. The cheapest flight booked recently is on Frontier for just $96, but on average you can expect to pay $135.
Are there nonstop flights from Ontario to Chicago for under $100 on Cheapflights?
Cheapflights has at least 20 direct flights from Ontario to Chicago under $100. A good price for a nonstop flight from Ontario to Chicago is less than $182.
Are there last-minute flights available from Ontario to Chicago for under $200?
There are currently 20+ open flights from Ontario to Chicago within the next 7 days for less than $200.
What is the cheapest airline to fly from Ontario to Chicago round-trip?
Cheapflights users have booked flights from Ontario to Chicago round-trip from $96. This flight start at 64% lower than the current average price 3 months from now.
What are the most popular routes from Ontario to Chicago?
Most travelers choose Ontario - Chicago O'Hare Intl, Ontario - Chicago Midway or Ontario - Chicago Greater Rockford when deciding on the best route from Ontario to Chicago.
What are the most popular airlines that fly from Ontario to Chicago?
Major Airline, American Airlines and Alaska Airlines are the most popular airlines when flying from Ontario to Chicago.
What are the cheapest flights from Ontario to Chicago?
On average you can expect to pay $267 for a flight from Ontario to Chicago. The cheapest flight overall is $88 while the most popular route, (Ontario - Chicago O'Hare Intl) is currently priced at $129.
Other flights from Ontario
Can I fly to Chicago from Ontario right now?
Most visitors from Ontario need to provide a negative COVID-19 test result and/or quarantine to enter Chicago.
COVID-19 testing requirements
Visitors from Ontario must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 24 hours before departing to Chicago.
Quarantine requirements
Visitors from Ontario are not required to quarantine after entering Chicago.
Can I fly back to Ontario from Chicago?
COVID-19 testing requirements
Visitors from Chicago must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 24 hours before departing to Ontario.
Quarantine requirements
Visitors from Chicago are not required to quarantine after entering Ontario.
Alternative routes for Ontario to Chicago
See prices for flight routes from nearby airports that may be better suited for you.
Top 6 airlines flying from Ontario to Chicago
The chart below displays the airlines Cheapflights users traveling from Ontario to Chicago choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Hourly flight availability from Ontario to Chicago
See what time of day planes typically take off from Ontario to Chicago
| 51%of flight departures | Early morningMidnight to 6 am |
|---|---|
| 33%of flight departures | Morning6 am to noon |
| 16%of flight departures | AfternoonNoon to 6 pm |
| 0%of flight departures | Evening6 pm to midnight |
Weekly flight availability from Ontario to Chicago
See how many times per day planes take to the skies headed from Ontario to Chicago
| Sunday | 1daily flight |
|---|---|
| Monday | 1daily flight |
| Tuesday | 0daily flights |
| Wednesday | 1daily flight |
| Thursday | 1daily flight |
| Friday | 1daily flight |
| Saturday | 0daily flights |