Cheap flights from Ontario (ONT) to Chicago (CHI)
The best prices from Ontario to Chicago are usually found in September or October, booked 26 days in advance, depart on a Thursday or Saturday and return on a Wednesday
How to find the cheapest flight from Ontario (ONT) to Chicago (CHI)
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 | $189 - $468 |
|---|---|
CHI Temperature | 23 - 73.4 °F |
CHI Rainfall | 1.7 - 4.9 inches |
| Popular in | July | High demand for flights, 31% potential price rise |
|---|---|---|
| Cheapest in | September | Best time to find cheap flights, 42% potential price drop |
| Round-trip from | $189 | From Ontario to Chicago (CHI) |
| One-way from | $70 | One-way flight from Ontario to Chicago (CHI) |
What is the cheapest day to fly round-trip from Ontario to Chicago?
Departing on a Wednesday is a good option for securing a great price. You can expect to save up to 27% 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 30 days in advance, which can save you up to 24% on flights from Ontario to Chicago compared to booking the week you need them. Waiting 30 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 $358. For sooner than that we have options available in the next 3 days from $421.
What is the cheapest month to fly from Ontario to Chicago?
Due to multiple factors, expect to potentially pay more when booking in June. For low rates, February can be a great choice for travel to Chicago. Flights to Chicago from Ontario in February are about $296 on average during February, but can be found for as low as $85.
When is the cheapest time to fly from Ontario to Chicago (ONT - CHI)?
Unlike at noon, when flights are generally more expensive, you can save up to 49% on flights from Ontario to Chicago by exploring options for tickets in the morning.
Cheap flights from Ontario to Chicago in September, October 2022
The best prices found for ONT to CHI flights for September, October
Ontario
Chicago Midway
Nonstop
3h 52mChicago Midway
Ontario
Nonstop
4h 29mFrontier
Ontario
Chicago Midway
Nonstop
3h 52mChicago Midway
Ontario
Nonstop
4h 29mFrontier
Ontario
Chicago Midway
Nonstop
3h 52mChicago Midway
Ontario
1 stop
6h 21mFrontier
Ontario to Chicago 2022 flight deals
Cheap flights to Chicago from Ontario found for this year
Ontario
Chicago Midway
Nonstop
3h 52mChicago Midway
Ontario
Nonstop
4h 29mFrontier
Ontario
Chicago Midway
Nonstop
3h 52mChicago Midway
Ontario
Nonstop
4h 29mFrontier
Ontario
Chicago Midway
Nonstop
3h 52mChicago Midway
Ontario
Nonstop
4h 29mFrontier
Cheap Frontier flights from Ontario to Chicago
Ontario
Chicago Midway
Nonstop
3h 52mChicago Midway
Ontario
Nonstop
4h 29mFrontier
Ontario
Chicago Midway
Nonstop
3h 52mChicago Midway
Ontario
Nonstop
4h 29mFrontier
Ontario
Chicago Midway
Nonstop
3h 52mChicago Midway
Ontario
Nonstop
4h 34mFrontier
Cheap United Airlines flights from Ontario to Chicago
Ontario
Chicago O'Hare Intl
1 stop
5h 57mChicago O'Hare Intl
Ontario
1 stop
9h 52mUnited Airlines
Ontario
Chicago O'Hare Intl
1 stop
5h 57mChicago O'Hare Intl
Ontario
1 stop
8h 12mUnited Airlines
Non-stop flights to Chicago from Ontario
Save time with Ontario to Chicago direct flight deals
Ontario
Chicago Midway
Nonstop
3h 52mChicago Midway
Ontario
Nonstop
4h 29mFrontier
Ontario
Chicago Midway
Nonstop
3h 52mChicago Midway
Ontario
Nonstop
4h 29mFrontier
Ontario
Chicago Midway
Nonstop
3h 52mChicago Midway
Ontario
Nonstop
4h 29mFrontier
Last minute flights from Ontario to Chicago
Late deals on return flights to Chicago from Ontario, departing today and this week
Ontario
Chicago Midway
1 stop
12h 26mChicago Midway
Ontario
Nonstop
4h 29mFrontier
Ontario
Chicago Midway
1 stop
5h 59mChicago Midway
Ontario
1 stop
6h 21mFrontier
Ontario
Chicago Midway
1 stop
13h 42mChicago Midway
Ontario
Nonstop
4h 29mFrontier
One-way flights to Chicago from Ontario
The cheapest one-way flights from Ontario to Chicago
Ontario
Chicago Midway
Nonstop
3h 52mFrontier
Ontario
Chicago Midway
Nonstop
3h 52mFrontier
Ontario
Chicago Midway
Nonstop
3h 52mFrontier
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 1 outbound flight 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. Frontier, American Airlines, and United Airlines are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like Frontier with this kind of flexibility.
Can I find flights from Ontario to Chicago for under $200 on Cheapflights?
Yes, there are multiple flights from Ontario to Chicago for under $200. The cheapest flight booked recently is on Frontier for just $133, but on average you can expect to pay $148.
Are there nonstop flights from Ontario to Chicago for under $200 on Cheapflights?
Cheapflights has at least 20 direct flights from Ontario to Chicago under $200. A good price for a nonstop flight from Ontario to Chicago is less than $152.
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 $133. This flight start at 59% 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?
Undisclosed Carrier, American Airlines and Delta 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 $621 for a flight from Ontario to Chicago. The cheapest flight overall is $123 while the most popular route, (Ontario - Chicago O'Hare Intl) is currently priced at $168.
Other flights from 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
| 0%of flight departures | Early morningMidnight to 6 am |
|---|---|
| 100%of flight departures | Morning6 am to noon |
| 0%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 | 0daily flights |
|---|---|
| Monday | 2daily flights |
| Tuesday | 2daily flights |
| Wednesday | 3daily flights |
| Thursday | 2daily flights |
| Friday | 3daily flights |
| Saturday | 1daily flight |