Beginning of main content
Trip Type
Flight 1
Flight 2
Flight 3
Flight 4
Flight 5

Search over 1,000,000 properties worldwide and 550 airlines worldwide.

Search over a million flights, hotels, packages, and more

No Expedia cancellation fee to change or cancel almost any hotel reservation.

Cheap ORD to ONT Flights

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

Chicago to Ontario route information

Origin Airport O'Hare Intl.
Destination Airport Los Angeles - Ontario Intl.
Airlines Serving Alaska Airlines, American Airlines, Delta, JetBlue Airways, United
Flight Price $244
Distance 1,695 mi



Orange County


Los Angeles




Cheap ORD to ONT Flights

  • Question : Can I change the date of my flight?
    Answer : You sure can switch your departure date and you may save money by changing when you leave. The cheapest day to fly in June is Tuesday. If you can go with the flow, you may just find that you can pocket some cash.
  • Question : How much time do people spend in Ontario?
    Answer : The average time spent sightseeing in Ontario by passengers from Chicago is seven days.
  • Question : Which airline has the least delays from Chicago to Ontario?
    Answer : Booking with United Airlines means you will arrive to Ontario pretty close to the time your ticket states. In fact, this timely airline has a 100% average for landing before the plane turns into a pumpkin. Of course, it never hurts to be prepared. If you’re on American Airlines, be sure to sign up for the delay notifications to stay up to date with your flight’s status.
  • Question : What is the cheapest day to fly to Ontario?
    Answer : May 31st has bookings (as of May 20th) for as little as $208. That comes in 47% below the average price. Saving now gives you more money in your pocket.
  • Question : How much is a plane ticket to Ontario (ONT) from Chicago (ORD)?
    Answer : Cost can range from $178 to $885, prices for ORD to ONT fluctuate less than the majority of routes in the United States. The further out you book, the more likely you are to save.
  • Question : What is the cheapest airline flying from Chicago to Ontario?
    Answer : United Airlines is your best friend for finding that in demand low fare. They offer fares as low as $178, while prices for similar flights can cost as much as $885.
  • Question : What is the cheapest day to fly?
    Answer : The cheapest day to fly from Chicago to Ontario is on Tuesday. If you are trying to save some cash on your next business trip look for flights on that day.