Cheap flights from Ontario to Chicago O'Hare Intl Airport from $55
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Chicago O'Hare Intl Airport departing on 4/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Frontier flights from Ontario to Chicago O'Hare Intl Airport
Our best Frontier deals on Ontario to Chicago O'Hare Intl Airport flight tickets
Delta flights from Ontario to Chicago O'Hare Intl Airport
Our best Delta deals on Ontario to Chicago O'Hare Intl Airport flight tickets
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How to get the cheapest flight ticket from Ontario to Chicago O'Hare Intl Airport
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Chicago O'Hare Intl Airport?
The month of October is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from Ontario averaging around $246.
What is the cheapest day to depart on your flight to Chicago O'Hare Intl Airport?
The cheapest day to depart on your flight to Chicago O'Hare Intl Airport is on a Wednesday when prices can be found for as low as $382. This is often the case because there is less demand to fly during this day of the week. On the other hand, Sunday is the most expensive day to depart from Ontario because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $498.
What is the cheapest time of day to depart on your flight to Chicago O'Hare Intl Airport?
Flying to Chicago O'Hare Intl Airport from Ontario in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $321 when looking at flights departing in the afternoon. Try not to purchase tickets at noon because they tend to be around $483. Of course, these prices can vary depending on the time of year and what airport you fly to.
What is the cheapest Ontario to Chicago O'Hare Intl flight route?
Fly from Ontario to Chicago O'Hare Intl for the best Ontario - Chicago O'Hare Intl flight prices
How far in advance should I book a flight to Chicago O'Hare Intl Airport?
You are more likely to see cheaper flights to Chicago O'Hare Intl Airport from Ontario when booking 9 weeks ahead of your departure date. In general, you can expect to find flights to Chicago O'Hare Intl Airport for around $353 when searching 9 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago O'Hare Intl Airport from Ontario for as low as $250 on momondo.
What cabin class options are available on Ontario to Chicago O'Hare Intl flights?
There are 1 cabin classes available to choose from on Ontario to Chicago O'Hare Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Ontario to Chicago O'Hare Intl?
Frontier, Delta, and Alaska Airlines are the most popular carriers operating from Ontario to Chicago O'Hare Intl
What airlines fly to Chicago O'Hare Intl Airport?
American Airlines, United Airlines and Spirit Airlines are the top three most popular airlines that fly to Chicago O'Hare Intl Airport from Ontario according to our data. American Airlines is the first choice among our users, with 42% of people opting to fly with this airline when traveling to Chicago O'Hare Intl Airport. Keep in mind that there are 9 different airlines that fly to Chicago O'Hare Intl Airport on a routine basis, so you have a few additional options to choose from.
When to book flights from Ontario to Chicago O'Hare Intl Airport
Cheap Ontario to Chicago O'Hare Intl Airport (ONT to ORD) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Ontario to Chicago O'Hare Intl Airport
How far is Ontario to Chicago O'Hare Intl by plane?
Chicago O'Hare Intl is 1697.7 mi away from Ontario. In terms of flight time, this usually takes a little over 4h 03m.
When did momondo last update prices for flights from Ontario Airport to Chicago O'Hare Intl Airport?
Prices for flights from Ontario Airport to Chicago O'Hare Intl Airport are updated daily.
How many operators does momondo search for flights from Ontario Airport to Chicago O'Hare Intl Airport?
As of February 2025, there are 7 operators available to choose from for flights from Ontario Airport to Chicago O'Hare Intl Airport.
How old do you have to be to fly from Ontario Airport to Chicago O'Hare Intl Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ontario Airport to Chicago O'Hare Intl Airport.
What documentation or ID do you need to fly to Chicago O'Hare Intl Airport?
The necessary travel and health documents for your Chicago O'Hare Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Ontario to Chicago O'Hare Intl Airport?
momondo data reveals that the most frequently booked plane model on the route from Ontario to Chicago O'Hare Intl Airport is Boeing 737-800, representing 50.00% of all bookings. The subsequent popular models are Boeing 737 MAX 8 at 27.78%, Airbus A320neo at 16.67%, and Boeing 757-300 at 5.56%.
What is the most popular airline from Ontario to Chicago O'Hare Intl Airport?
Based on momondo bookings for flights between Ontario and Chicago O'Hare Intl Airport, the leading airline is American Airlines, making up 45% of the total bookings. Other popular airlines include Frontier with 26%, United Airlines with 11%, and Delta with 8%.
Best airlines flying from Ontario to Chicago O'Hare Intl Airport
Compare and see reviews for airlines that fly from Ontario to Chicago O'Hare Intl Airport with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $74 | Free Cancellation | Rating 6.3 8,012 reviews | |||
| PriceFrom $109 | Free Cancellation | Rating 6.0 3,352 reviews | |||
| PriceFrom $161 | Free Cancellation | Rating 8.0 9,702 reviews | |||
| PriceFrom $236 | Free Cancellation | Rating 8.0 8,203 reviews | |||
| PriceFrom $246 | Free Cancellation | Rating 7.4 8,754 reviews | |||
| PriceFrom $246 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $345 | Free Cancellation | Rating 8.1 4,396 reviews |
Traveling to a place near Chicago?
Book flights to Chicago if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Ontario to Chicago?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Chicago from Ontario.
Can I find flights from Ontario to Chicago with flexible booking policies on momondo?
All flight searches from Ontario to Chicago on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from Ontario to Chicago?
Once all potential Ontario to Chicago flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from Ontario to Chicago right now. Can momondo alert me if prices change?
If you are simply researching potential flights to Chicago, momondo offers a useful price alert feature which will track prices for flights to Chicago from Ontario and alert you when they change.