$109 Find Cheap Flights from Ontario to Chicago - Compare and Save

These are the earliest and latest flight times available from Ontario to Chicago:

• Earliest: departs at 6:12 am and lands at 10:08 am
• Latest: departs at 11:55 pm and lands at 3:51 am.

The flight takes about 3h 56m.

Two cabin classes are available on flights from Ontario to Chicago:

• Economy Class
• First Class

A nonstop flight from Ontario to Chicago takes 3h 56m, covering 1,708 miles.

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID or another TSA-accepted form of identification.

Round-trip flights from Ontario to Chicago range from $340 to $541, with an average of $436 over the past 12 months. Anything below $340 counts as a good deal.

Last-minute fares on this route (booked within two weeks of departure) run 18% above the $436 route average. Book 9 weeks before departure for the lowest fares.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $235 round-trip via Houston George Bush Intcntl (IAH), compared to $452 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $40–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

Morning is the busiest departure period on Ontario to Chicago flights, with 50% of flights leaving in that window. Night departures account for 50%, afternoon flights for 0%, and evening flights for 0%.

Two airlines offer in-flight Wi-Fi on Ontario to Chicago flights:

• American Airlines
• JetBlue

Pricing varies by airline and fare class. Some plans are included with the ticket or loyalty program; others are paid add-ons priced by flight length.

One-way fares from Ontario to Chicago are currently lower than usual. Average one-way flight prices are about $123, which is 47% below the typical average for this route.

Since Chicago is served by multiple airports, car rental options and rates can vary depending on which one you fly into.
Near Chicago O'Hare Intl Airport (ORD) — daily rates from around $17:

• Routes Car & Truck Rentals
• Europcar
• Hertz
• Dollar
• Ace

Near Chicago Midway Airport (MDW) — daily rates from around $32:

• Hertz
• Dollar
• Budget
• Alamo
• Rent-A-Wreck

Near Chicago Greater Rockford Airport (RFD) — daily rates from around $30:

• Alamo
• Enterprise Rent-A-Car
• Budget
• Avis
• National

Flights from Ontario to Chicago usually depart from Ontario (ONT) and may arrive at several airports in Chicago area, including Chicago Midway (MDW), Chicago O'Hare Intl (ORD) and Chicago Greater Rockford (RFD).

One-stop flights from Ontario to Chicago most commonly connect through:

• Phoenix Sky Harbor Intl (PHX) - 25% of one-stop connections
• Denver Intl (DEN) - 20% of one-stop connections
• Las Vegas Harry Reid Intl (LAS) - 19% of one-stop connections
• Salt Lake City (SLC) - 16% of one-stop connections

Yes. Flexible dates can save you up to 21% on flights from Ontario to Chicago. Tuesday is the cheapest departure day at $397 round-trip on average, while Sunday is the most expensive at $502, a difference of $105.

KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

3 airlines operate flights between Ontario and Chicago. The airlines offering nonstop flights on this route include:

• United Airlines
• Southwest
• American Airlines

Flying via Phoenix Sky Harbor Intl (PHX) gives the shortest average 1-stop total travel time at 6h 15m, compared with 6h 34m via Salt Lake City (SLC) and 7h 34m via Dallas Love Field (DAL).

Chicago is 2 hours ahead of Ontario (Central Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

Some of the most popular sights in Chicago are Magnificent Mile, Grant Park and Soldier Field. These are among the most viewed places in Chicago on KAYAK.

Among airlines operating Ontario to Chicago flights:

• United Airlines: offers extra legroom; offers free seat selection
• Southwest: offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

Here are some options for this route, based on selected ticket types and cabin classes:

• United Airlines: a cabin bag and a checked bag in Economy Class
• Southwest: a cabin bag and a checked bag in Economy Class
• American Airlines: a cabin bag in Economy Class class

Bag allowance can vary by ticket type, cabin class, route and airline, so always check the fare details before booking.

ORD offers the best linkage to The Museum of Science and Industry, which lies approximately 24.2 miles away. Bus line 6 provides the most convenient connection to this attraction, covering the journey in about 1h 18min. For a quicker connection, take a taxi and get there in under 30min.

Religious souls landing at MDW from ONT and want to thank the Almighty for the safe trip will find a sacred suite where they can retreat quietly and respectfully. You can locate this sanctuary in Concourse C on the mezzanine level, and it’s open 24/7.

There’s a wide range of car rental services at ORD, ideal for anyone keen to explore Chicago in a car. Once you land at the airport, locate your car dealer’s desk in the arrival hall. A free shuttle will drop you at the pick-up point at Routes Car & Truck Rentals at 3901 Mannheim Rd, Schiller Park.

ORD boasts an extensive exhibition of unique pieces of art and crafts throughout its terminals. Consider killing time in concourses B and C and enjoy the various sculptures, murals, and paintings.