There are most likely no direct flights on the Chicago — Ontario route
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 Chicago to Ontario. We have connected more than 40 airlines and airline ticketing agencies to help you find the most suitable and affordable flight option.
A non-stop flight is the most convenient and comfortable way to fly from Chicago to Ontario, 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.
In different months, ticket prices from Chicago to Ontario vary: minimum — $100 (September 2026), maximum — $203 (December 2026). Typically, the flight costs $136–$137.
Flight costs from Chicago to Ontario climb toward the middle of the period, then start to drop. By choosing the right dates, you can save noticeably.
Prices rise from June 2026 to July 2026 (+30%), then decline from July 2026 to September 2026 (27%). The cheapest tickets are in July 2026–September 2026 (averaging $118), while the priciest are in September 2026–December 2026 ($152).
For savings, plan your flight for July 2026–September 2026 — you could save up to 22%. Try to avoid September 2026–December 2026 when possible: prices are at their highest then.
Price spread on this route is 30.2%. Costs depend heavily on the season, so flexibility in choosing your departure month is especially valuable here.
There are most likely no direct flights on the Chicago — Ontario route
Chicago — Ontario
07/07/2026
Departure
Direct flight
WN2846
starting at $328
starting at $328
starting at $164
The Chicago — Ontario route is served by multiple airlines, including Southwest Airlines and Frontier Airlines. This is convenient for those who want the best balance of price, schedule, and travel conditions. Tickets start from $164, and depending on season and promotions, even better deals may appear. With our service, you can easily compare available options and book tickets that match your plans. The variety of carriers allows flexible choices and comfortable travel without overpaying.
The cheapest flight ticket from Chicago to Ontario according to data for the last 48 hours costs $164
Often the best time to buy tickets from Chicago to Ontario is 2 months before departure.
Based on statistics over the past years, the lowest prices for flights from Chicago to Ontario can be found flying in these months: September, June, July.
The fastest flights from Chicago to Ontario start from 14 hours 7 minutes in the air.
The following airlines operate direct flights on the route Chicago — Ontario: Southwest Airlines
The cheapest one-way flight from Chicago to Ontario departs on 07/08/2026, is operated by Frontier Airlines and costs $164
There is no information about the cheapest roundtrip flight from Chicago to Ontario
Fastest flight from Chicago to Ontario takes 14h 7m
There are direct flights on this route 1 day a week: Tu
The distance between Chicago and Ontario is 2754km (1707 miles). There are 3 direct flights from Chicago to Ontario. The time difference between Chicago and Ontario is 2h. Flights from Chicago begin at 11:45 AM. The latest flight from Chicago departs at 8:18 PM
We couldn't find any special offers for flights from Chicago to Ontario