Cheap Flights from Ontario to Chicago

Cheapest flights from Ontario to Chicago

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.

Cheapest one way flight

$47

American Airlines

Direct flight

4h 2m

02/26/2026

The cheapest one-way flight from Ontario to Chicago departs on 02/26/2026, is operated by American Airlines and costs $47

Cheapest round trip flight

$102

American Airlines

Direct flight

8h 41m

02/11/2026

The cheapest roundtrip flight from Ontario to Chicago departs on 02/11/2026, is operated by American Airlines and costs $102

The fastest flight

4h 2m

Fastest flight from Ontario to Chicago takes 4h 2m

Direct flights

Several times a week

There are direct flights on this route 2 days a week: Tu and Th

Earliest flight

7:02 AM

Latest flight

7:02 AM

Direct flights count

8

Distance

2754km

Timezone difference

2h

The distance between Ontario and Chicago is 2754km (1707 miles). There are 8 direct flights from Ontario to Chicago. The time difference between Ontario and Chicago is 2h. Flights from Ontario begin at 7:02 AM. The latest flight from Ontario departs at 7:02 AM

Remember that on average the ideal time to book flights is 2 months before departure!

Airfare from Ontario to Chicago by month

The minimum one-way ticket price from Ontario to Chicago is $100 (January 2026), while the maximum is $103 (December 2025). On average, a ticket costs $102–$103.

January 2026

Lowest price

on average:

$100

December 2025

Highest price

on average:

$103

Avg Price

Airlines operating on route

The Ontario — Chicago route is served by a wide range of airlines: 6 in total, including United Airlines, Spirit Airlines, Frontier Airlines, American Airlines, Southwest Airlines, and Alaska Airlines. Competition among carriers gives passengers the opportunity to find tickets at attractive fares — with prices starting from $47. Our service helps compare all available offers within seconds and choose the most convenient option. You can filter flights by price, departure time, or baggage rules to make your trip as comfortable as possible. With so many airlines, there’s always a chance to catch special promotions and save.

Starting at $337

Starting at $89

Starting at $99

Starting at $47

Starting at $317

Starting at $221

Direct Flights from Ontario to Chicago

A direct 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.

Los Angeles — Chicago

LAX — CHI

01/02/2026

Departure

Direct flight

UA212

Starting at $395

Los Angeles — Chicago

LAX — CHI

12/24/2025

Departure

Direct flight

NK155

Starting at $345

Los Angeles — Chicago

LAX — CHI

01/01/2026

Departure

Direct flight

NK155

Starting at $168

Los Angeles — Chicago

LAX — CHI

01/02/2026

Departure

Direct flight

F92446

Starting at $276

Los Angeles — Chicago

LAX — CHI

02/24/2026

Departure

Direct flight

AA2212

Starting at $599

Los Angeles — Chicago

LAX — CHI

02/25/2026

Departure

Direct flight

AA3225

Starting at $47

Ontario — Chicago

ONT — CHI

12/09/2025

Departure

Direct flight

WN3058

Starting at $331

Ontario — Chicago

ONT — CHI

12/11/2025

Departure

Direct flight

WN3058

Starting at $317

Ontario — Chicago

ONT — CHI

04/16/2026

Departure

Direct flight

UA2247

Starting at $337

Schedule of direct flights from Ontario to Chicago

A direct flight is the easiest way to get to your destination. The following airlines operate non-stop flights from Ontario to Chicago:

Unable to find information about the schedule of direct flights from

Ontario airports overview

Ontario International Airport

•

ONT

5km

Serves Ontario and the Inland Empire region of Southern California, offering domestic and select international flights; convenient for travelers to Los Angeles, San Bernardino and nearby business centers.

•

Chicago airports overview

Merrill C Meigs

•

CGX

3km

Former single-runway general aviation facility on Chicago’s lakefront adjacent to downtown, serving business and private flights until its abrupt closure in 2003.

DuPage Airport

•

DPA

52km

General aviation reliever near Chicago in West Chicago, Illinois, serving corporate, private and flight-training traffic with hangars, FBO services and maintenance, convenient for access to the western suburbs.

Chicago Midway International Airport

•

MDW

14km

Serving Chicago’s Southwest Side and downtown, it handles mainly domestic flights with a strong presence of low-cost carriers and easy connections via the 'L' Orange Line and nearby expressways.

O'Hare International Airport

•

ORD

26km

Chicago Executive Airport

•

PWK

35km

Chicago Rockford International Airport

•

RFD

140km

Serving Rockford and northern Illinois, the airport handles domestic passenger flights and is a major cargo hub. Convenient ground links provide access to the Chicago metro and surrounding communities.

•

Frequently asked questions (FAQ)

Answers to questions about the route that travelers are most interested in.

How much is the cheapest flight ticket from Ontario to Chicago?

The cheapest flight ticket from Ontario to Chicago according to data for the last 48 hours costs $47

When is the best time to buy air tickets on the route Ontario — Chicago?

Often the best time to buy tickets from Ontario to Chicago is 2 months before departure.

When is the cheapest time of year to fly from Ontario to Chicago?

Based on statistics over the past years, the lowest prices for flights from Ontario to Chicago can be found flying in these months: January, December.

How long does it take to fly from Ontario to Chicago?

The fastest flights from Ontario to Chicago start from 4 hours 2 minutes in the air.

Which airline can fly direct from Ontario to Chicago?

The following airlines operate direct flights on the route Ontario — Chicago: United Airlines, Spirit Airlines, Frontier Airlines

Special offers and sales on air tickets from Ontario to Chicago

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.

We couldn't find any special offers for flights from Ontario to Chicago

Alternative routes

Bakersfield ➜ Chicago•Fresno ➜ Chicago•Long Beach ➜ Chicago•Merced ➜ Chicago•Modesto ➜ Chicago•Mexicali ➜ Chicago•Santa Barbara ➜ Chicago•Santa Maria ➜ Chicago•Tijuana ➜ Chicago•Yuma ➜ Chicago•Ontario ➜ Appleton•Ontario ➜ Kalamazoo•Ontario ➜ Champaign•Ontario ➜ Fort Wayne•Ontario ➜ Indianapolis•Ontario ➜ Lansing•Ontario ➜ Milwaukee•Ontario ➜ Muskegon•Ontario ➜ South Bend

•••••••••••••••••••

Cheapest one way flight

$47

American Airlines

Direct flight

4h 2m

02/26/2026

The cheapest one-way flight from Ontario to Chicago departs on 02/26/2026, is operated by American Airlines and costs $47

Cheapest round trip flight

$102

American Airlines

Direct flight

8h 41m

02/11/2026

The cheapest roundtrip flight from Ontario to Chicago departs on 02/11/2026, is operated by American Airlines and costs $102

The fastest flight