starting at $292
starting at $121
Flaut.Travel was designed and developed by a team dedicated to making the process of searching, comparing and booking airline tickets as easy and convenient as possible. Our service helps travelers to find and buy the cheapest flights from Ontario to Chicago. We have connected more than 40 airlines and airline ticketing agencies to help you find the most suitable and affordable flight option.
The minimum one-way ticket price from Ontario to Chicago is $89 (October 2026), while the maximum is $103 (November 2026). On average, a ticket costs $96–$103.
A non-stop flight is the most convenient and comfortable way to fly from Ontario to Chicago, despite the fact that sometimes flights with transfers can cost significantly less.
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Answers to questions about the route that travelers are most interested in.
We keep tight track on airlines' pre-holidays sales and other special offers occurences all the time to let you save maximum amount of funds while traveling to your family or just going out on vacation.
The route Ontario — Chicago is served by several airlines: Southwest Airlines and Frontier Airlines. This gives passengers more freedom in choosing flights. You can consider not only the price but also schedules, baggage policies, and onboard service. Our service compares all offers so you can find tickets from $121 and choose the most convenient option. Thanks to airline competition, you may also find promotional fares or special offers, helping you save even more. Plan your trip in advance and choose the best flights without overpaying.
starting at $292
starting at $121
Ontario — Chicago
10/25/2026
Departure
Direct flight
WN3270
starting at $292
There are most likely no direct flights on the Ontario — Chicago route
The cheapest flight ticket from Ontario to Chicago according to data for the last 48 hours costs $121
Often the best time to buy tickets from Ontario to Chicago is 2 months before departure.
Based on statistics over the past years, the lowest prices for flights from Ontario to Chicago can be found flying in these months: October, November.
The fastest flights from Ontario to Chicago start from 16 hours 9 minutes in the air.
The following airlines operate direct flights on the route Ontario — Chicago: Southwest Airlines
All airports
The cheapest one-way flight from Ontario to Chicago departs on 10/24/2026, is operated by Frontier Airlines and costs $121
The cheapest roundtrip flight from Ontario to Chicago departs on 11/20/2026, is operated by Alaska Airlines and costs $355
Fastest flight from Ontario to Chicago takes 16h 9m
There are direct flights on this route 1 day a week: Su
The distance between Ontario and Chicago is 2754km (1707 miles). There are 10 direct flights from Ontario to Chicago. The time difference between Ontario and Chicago is 2h. Flights from Ontario begin at 6:59 AM. The latest flight from Ontario departs at 11:55 PM
