Cheap flights from Ontario to Chicago from $53
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 departing on 2/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Deals available from 900+ travel sites.
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Ontario to Chicago
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
Cheap bus & train deals from Ontario to Chicago
All round-trip flight deals to Chicago
American Airlines flights from Ontario to Chicago
Our best American Airlines deals on Ontario to Chicago flight tickets
Southwest flights from Ontario to Chicago
Our best Southwest deals on Ontario to Chicago flight tickets
See travel insights to Chicago from
How to get the cheapest flight ticket from Ontario to Chicago
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 typical price of a round-trip flight between Ontario and Chicago?
What is the cheapest month to fly to Chicago?
The month of January is, on average, the cheapest month to fly to Chicago from Ontario, with most prices found around $238. If you’re not able to fly to Chicago in January, then February is your next best option. Flight prices from Ontario to Chicago during February average around $258.
What is the cheapest day to depart on your flight to Chicago?
The cheapest day to depart on your flight to Chicago is on a Saturday when prices can be found for as low as $288. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Ontario to Chicago for around $339.
What is the cheapest time of day to depart on your flight to Chicago?
Our most recent data shows that the best time of day to fly to Chicago is in the evening. Flights from Ontario to Chicago during this time can be as low as $279. In contrast, the most expensive time of day to depart to Chicago is at noon when prices are around $348.
What is the cheapest Ontario to Chicago flight route?
Fly from Ontario to Chicago Midway for the best Ontario - Chicago flight prices
How far in advance should I book a flight to Chicago?
The best time to book a flight to Chicago from Ontario is 54 days out, which is when prices tend to be around $347. Don’t hesitate to check prices now though because momondo users recently found tickets for as low as $143.
What cabin class options are available on Ontario to Chicago flights?
There are 1 cabin classes available to choose from on Ontario to Chicago flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
Can stopping save me money on Ontario to Chicago flights?
You could potentially save up to 64% on your flight if you consider stops on a Ontario to Chicago flight.
How have Ontario to Chicago flight prices changed over time?
As of December 2024, prices for Ontario to Chicago flights are approximately 40% cheaper when compared to flights at the same time last year.
How many flights depart from Ontario to Chicago on average per day?
As of December 2024, 1 flights take off from Ontario and land in Chicago each day. The most common flight departure time for this route is 10:00AM, with 100% of daily flights taking off at noon.
How many flights depart from Ontario to Chicago on average per week?
The number of flights available between Ontario and Chicago is 13 per week as of December 2024. The most frequent departure day is Tue, with 23% of weekly flights leaving on this day.
When to book flights from Ontario to Chicago
Cheap Ontario to Chicago (ONT to CHI) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Ontario to Chicago
How far is Ontario to Chicago by plane?
The straight-line distance from Ontario to Chicago is 1710.7 mi. 3h 45m is a normal flight duration for this route.
When did momondo last update prices for flights from Ontario Airport to Chicago?
Prices for flights from Ontario Airport to Chicago were last updated today.
How many operators does momondo search for flights from Ontario Airport to Chicago?
As of December 2024, there are 6 operators available to choose from for flights from Ontario Airport to Chicago.
How old do you have to be to fly from Ontario Airport to Chicago?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Chicago.
What documentation or ID do you need to fly to Chicago?
The travel and health documents required for your trip to Chicago can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Chicago. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Ontario to Chicago?
Based on momondo bookings for flights between Ontario and Chicago, the leading plane model is Airbus A320neo, making up 17.74% of the total bookings. Other popular models include Airbus A321neo with 15.32%, Boeing 737-800 Passenger/BBJ2 (winglets) with 12.90%, and Airbus A321 (sharklets) with 8.87%.
What is the most popular airline from Ontario to Chicago?
Based on momondo bookings for flights between Ontario and Chicago, the leading airline is Frontier, making up 41% of the total bookings. Other popular airlines include American Airlines with 33%, United Airlines with 7%, and Southwest with 7%.
Best airlines flying from Ontario to Chicago
Compare and see reviews for airlines that fly from Ontario to Chicago with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $92 | Free Cancellation | Rating 6.3 8,107 reviews | |||
| PriceFrom $109 | Free Cancellation | Rating 6.1 3,468 reviews | |||
| PriceFrom $236 | Free Cancellation | Rating 8.0 8,580 reviews | |||
| PriceFrom $254 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $273 | Free Cancellation | Rating 7.4 9,009 reviews | |||
| PriceFrom $358 | Free Cancellation | Rating 8.1 4,765 reviews |
Southwest Flights From Ontario to Chicago
Southwest flight deals from Ontario to Chicago start from $358 round-trip. Over the 8 Southwest flights for this route in a normal week, average airfare is usually $505 round-trip - but some users have found much cheaper deals with momondo.
United Airlines Flights From Ontario to Chicago
The best United Airlines deal for Ontario to Chicago flight tickets found on momondo in the last 72 hours was $273, round-trip. It should be noted that an average United Airlines flight deal for this route in this time was higher, at $459 round-trip. United Airlines operates 5 flights out of Ontario into Chicago in an average week, so prices vary by time and availability. 9,009 United Airlines reviews by users on momondo have scored the airline at 7.4/10.
Why use momondo?
Why should I use momondo to find a flight deal from Ontario to Chicago?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ontario to Chicago. momondo saves you time and could save you money on your trip.
Can I find flights from Ontario to Chicago with flexible booking policies on momondo?
Yes. All flights to Chicago from Ontario on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from Ontario to Chicago?
Once you have performed a search for Ontario to Chicago flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.
I’m not ready to book a flight from Ontario to Chicago right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of Ontario to Chicago flights. All you need is a valid email address and we will do the rest; it is that quick and easy.