The cheapest flights to O'Hare Intl. found within the past 7 days were $96 round trip and $54 one way. Prices and availability subject to change. Additional terms may apply.
To find the best deals on flights to Ontario from Chicago with Frontier Airlines, just enter your travel dates, filter by Frontier Airlines, and hit search. You’ll find flights to choose from and can sort by price, flight duration, and arrival or departure time.
If you’re planning a round trip, booking return flights with Frontier Airlines is usually the most cost-effective option. With airfares ranging from $96 to $123, it’s easy to find a flight that suits your budget. Prices and availability subject to change. Additional terms may apply.
A one-way ticket gives you much greater flexibility—allowing you to choose your return date, destination, and time whenever you’re ready. By booking in advance you can find great deals on one-way tickets too. Right now, a one-way Frontier Airlines flight from Ontario to Chicago costs from $54. Prices and availability subject to change. Additional terms may apply.
To find a cheap Frontier Airlines flight from Ontario ONT to Chicago ORD, sort your search results by price or filter by budget. Thanks to Travelocity’s Price Match Promise, if you find a better airfare deal anywhere else within 24 hours, we’ll credit or refund the difference.
If you’re looking for cheap flights, it helps to be flexible when it comes to your travel dates. You’ll usually find lower cost tickets when you travel during quieter months such as May, or if you book a flight with a stopover.
If you’re keen to be on Chicago soil fast, don’t waste time with a stopover—filter your search results to show direct Frontier Airlines flights only. The journey takes around hour(s) min(s) – so you’ll be there before you know it.
Make sure you’re not out of pocket if plans change by choosing a flexible ticket with penalty-free amendment and cancellation options. Use our ‘no change fee’ filter to see which flights have this option.
At Travelocity our vast and up-to-the-minute inventory puts all of our best flight deals in one place. So, whether you’re traveling on business or jetting off with friends and family, you can trust Travelocity to get you there.
Number of Flights
|GDL||MEX||Don Miguel Hidalgo y Costilla Intl.||5|
|MEX||MEX||Mexico City Intl.||1|
|LAX||USA||Los Angeles Intl.||1|
Reviewed on Aug 24, 2021
Reviewed on Dec 13, 2021
Reviewed on Jan 8, 2022