Cheap flights from Chicago to Ontario from $44

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Tue 10/3
Tue 10/10

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Flight information for Chicago to Ontario
(CHI to ONT)

Find info about flight duration, direct flights, and airports for your flight from Chicago to Ontario

Best Price Found

$44

Fastest flight time

4h 00m

Direct flights

Every day

Airports in Ontario

1 airport
The best one-way flight to Ontario from Chicago in the past 72 hours is $44. The best round-trip flight deal from Chicago to Ontario found on momondo in the last 72 hours is $114.
The fastest flight from Chicago to Ontario takes 4h 00m
Direct flights go from Chicago to Ontario every day.
There is 1 airport near Ontario: Ontario (ONT)

How to get the cheapest flight ticket from Chicago to Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly from Chicago to Ontario?

September. The cheapest time of year to fly to Ontario from Chicago is September. Most expensive is March

What is the cheapest day to depart Chicago for Ontario?

Thursday. The cheapest day of the week is typically Thursday. The most expensive is typically Sunday

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

In the afternoon. Chicago to Ontario flights are approximately 53% more expensive at noon than in the afternoon

What is the cheapest airline that flies to Ontario from Chicago?

Frontier. American Airlines, Delta, and Frontier are the most popular carriers operating from Chicago to Ontario

What is the cheapest Chicago to Ontario flight route?

Chicago Midway - Ontario. Fly from Chicago Midway to Ontario for the best Chicago - Ontario flight prices

How far in advance should you book Chicago to Ontario flights?

24 days before. The cheapest time to buy a flight from Chicago to Ontario is approximately 24 days to departure

How many flights depart from Chicago to Ontario on average per day?

As of September 2023, there are 2 flights per week flying from Chicago to Ontario. The most common time of day flights depart is 1:00PM, with 100% of flights taking off in the afternoon.

How many flights depart from Chicago to Ontario on average per week?

As of September 2023, 19 flights take off from Chicago and land in Ontario each week. The most common flight departure day for this route is Monday, with 16% of weekly flights taking off on this day.

Can stopping save me money on Chicago to Ontario flights?

You could potentially save up to 13% on your flight if you consider stops on a Chicago to Ontario flight.

When you’re planning your trip from Chicago to Ontario, the most popular airport-to-airport route is Chicago O'Hare Intl Airport to Ontario Airport. When booking your trip to Ontario, it is helpful to have an alternative airport to fly out of. The nearest airport to Chicago O'Hare Intl Airport is Chicago Midway Airport which is located in Chicago. You may be looking for an airport near Ontario Airport to land at when traveling from Chicago and luckily, there are options! You can try Los Angeles Airport which is located in Los Angeles, Burbank Bob Hope Airport which is located in Burbank, or Santa Ana J. Wayne/Orange Cnty Airport which is located in Santa Ana. In September, $91 is typically the cheapest round trip price you’ll find from Chicago to Ontario which you can find when you fly ORD — LAX.

Chicago O'Hare Intl Airport (ORD) to Los Angeles Airport (LAX)$91
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Chicago O'Hare Intl Airport (ORD) to Burbank Bob Hope Airport (BUR)$112
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Chicago Midway Airport (MDW) to Los Angeles Airport (LAX)$117
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Chicago O'Hare Intl Airport (ORD) to Ontario Airport (ONT)$129
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Chicago O'Hare Intl Airport (ORD) to Santa Ana J. Wayne/Orange Cnty Airport (SNA)$102
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Chicago Midway Airport (MDW) to Ontario Airport (ONT)$113
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Easily compare round-trip flights from Chicago to Ontario

Below you can see the best fares for your round-trip flight route over the next six months. All fares were found on momondo this week. Browse the quickest and cheapest flights from Chicago to Ontario by changing tabs
Frontier
Oct 27
MDW6:34 pmChicago Midway
14h 10m
1 stop
ONT5:44 amOntario
Nov 1
ONT7:29 amOntario
7h 49m
1 stop
MDW3:18 pmChicago Midway
Multiple Airlines
Nov 28
ORD1:07 pmChicago O'Hare Intl
19h 25m
1 stop
ONT5:32 amOntario
Dec 5
ONT12:00 amOntario
12h 17m
2 stops
ORD12:17 pmChicago O'Hare Intl
American Airlines
Oct 25
ORD9:55 amChicago O'Hare Intl
9h 03m
1 stop
ONT3:58 pmOntario
Oct 27
ONT8:59 pmOntario
8h 17m
1 stop
ORD5:16 amChicago O'Hare Intl
Frontier
Nov 1
MDW11:25 amChicago Midway
8h 30m
1 stop
ONT4:55 pmOntario
Nov 7
ONT6:29 amOntario
7h 49m
1 stop
MDW2:18 pmChicago Midway
Alaska Airlines
Oct 24
ORD3:30 pmChicago O'Hare Intl
15h 47m
1 stop
ONT4:17 amOntario
Oct 31
ONT12:13 pmOntario
10h 47m
1 stop
ORD11:00 pmChicago O'Hare Intl
Frontier
Oct 25
MDW11:25 amChicago Midway
8h 30m
1 stop
ONT4:55 pmOntario
Nov 1
ONT7:29 amOntario
7h 49m
1 stop
MDW3:18 pmChicago Midway

Find the cheapest one-way flights from Chicago to Ontario

If you're looking for one-way flights from Chicago to Ontario, view some of our deals below provided by Frontier and Southwest
Frontier
Oct 31
MDW1:45 amChicago Midway
14h 10m
1 stop
ONT12:55 pmOntario
Multiple Airlines
Nov 1
ORD3:00 amChicago O'Hare Intl
16h 55m
1 stop
ONT4:55 pmOntario
Multiple Airlines
Nov 15
ORD1:35 amChicago O'Hare Intl
17h 22m
1 stop
ONT3:57 pmOntario

Search last-minute flights to Ontario from Chicago

Find and compare round-trip flight prices for your last-minute flight from Chicago to Ontario
Frontier
Oct 4
MDW1:50 amChicago Midway
9h 16m
1 stop
ONT8:06 amOntario
Oct 10
ONT11:43 amOntario
6h 41m
1 stop
MDW6:24 pmChicago Midway
Multiple Airlines
Oct 8
ORD7:07 pmChicago O'Hare Intl
13h 12m
1 stop
ONT5:19 amOntario
Oct 10
ONT10:14 amOntario
15h 28m
2 stops
ORD1:42 amChicago O'Hare Intl
Frontier
Oct 7
MDW2:00 amChicago Midway
20h 19m
1 stop
ONT7:19 pmOntario
Oct 10
ONT11:43 amOntario
6h 41m
1 stop
MDW6:24 pmChicago Midway
Frontier
Oct 4
MDW1:50 amChicago Midway
9h 16m
1 stop
ONT8:06 amOntario
Oct 11
ONT7:21 pmOntario
11h 05m
1 stop
MDW6:26 amChicago Midway
Frontier
Oct 4
MDW1:50 amChicago Midway
9h 16m
1 stop
ONT8:06 amOntario
Oct 6
ONT10:14 amOntario
21h 00m
1 stop
MDW7:14 amChicago Midway
Frontier
Oct 3
MDW9:08 amChicago Midway
12h 32m
1 stop
ONT6:40 pmOntario
Oct 10
ONT11:43 amOntario
6h 41m
1 stop
MDW6:24 pmChicago Midway

Best airlines flying from Chicago to Ontario

Compare and see reviews for airlines that fly from Chicago to Ontario with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $119Free CancellationRating
5.8
1,041 reviews
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Spirit AirlinesPriceFrom $138Free CancellationRating
6.0
2,809 reviews
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United AirlinesPriceFrom $261Free CancellationRating
7.2
2,716 reviews
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American AirlinesPriceFrom $332Free CancellationRating
7.1
2,890 reviews
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DeltaPriceFrom $332Free CancellationRating
7.8
1,565 reviews
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Frontier flights from Chicago to Ontario

Our best Frontier deals on Chicago to Ontario flight tickets
Frontier
Oct 27
MDW6:34 pmChicago Midway
14h 10m
1 stop
ONT5:44 amOntario
Nov 1
ONT7:29 amOntario
7h 49m
1 stop
MDW3:18 pmChicago Midway
Frontier
Nov 1
MDW11:25 amChicago Midway
8h 30m
1 stop
ONT4:55 pmOntario
Nov 7
ONT6:29 amOntario
7h 49m
1 stop
MDW2:18 pmChicago Midway
Frontier
Oct 25
MDW11:25 amChicago Midway
8h 30m
1 stop
ONT4:55 pmOntario
Nov 1
ONT7:29 amOntario
7h 49m
1 stop
MDW3:18 pmChicago Midway

American Airlines flights from Chicago to Ontario

Our best American Airlines deals on Chicago to Ontario flight tickets
American Airlines
Oct 25
ORD9:55 amChicago O'Hare Intl
9h 03m
1 stop
ONT3:58 pmOntario
Oct 27
ONT8:59 pmOntario
8h 17m
1 stop
ORD5:16 amChicago O'Hare Intl
American Airlines
Oct 29
ORD4:35 amChicago O'Hare Intl
7h 13m
1 stop
ONT8:48 amOntario
Nov 1
ONT8:59 pmOntario
6h 35m
1 stop
ORD3:34 amChicago O'Hare Intl
American Airlines
Oct 5
ORD8:30 amChicago O'Hare Intl
10h 28m
1 stop
ONT3:58 pmOntario
Oct 17
ONT6:28 pmOntario
9h 47m
1 stop
ORD4:15 amChicago O'Hare Intl

  • How far is Chicago to Ontario by plane?

    The distance between Chicago and Ontario is about 1710.7 mi. In terms of flight time, this usually takes a little over 4h 25m.

  • When did momondo last update prices for flights from Chicago to Ontario Airport?

    Prices for flights from Chicago to Ontario Airport refresh daily.

  • How many operators does momondo search for flights from Chicago to Ontario Airport?

  • How old do you have to be to fly from Chicago to Ontario Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago to Ontario Airport.

  • What documentation or ID do you need to fly to Ontario Airport?

    The travel and health documents required for your trip to Ontario Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.


Alternative routes for Chicago to Ontario

Compare alternative flights to and from nearby airports and cities to discover the best prices and most convenient flight times
Chicago to Los Angeles Flights
Fastest flight time4h 15m
Cheapest price$91
Chicago to Burbank Flights
Fastest flight time5h 55m
Cheapest price$112
Chicago to Santa Ana Flights
Fastest flight time4h 10m
Cheapest price$102
Chicago to Oakland, California Flights
Fastest flight time6h 10m
Cheapest price$106
Chicago to Palm Springs Flights
Fastest flight time4h 10m
Cheapest price$237
Chicago to San Diego Flights
Fastest flight time4h 30m
Cheapest price$99
Chicago to San Francisco Flights
Fastest flight time4h 28m
Cheapest price$78
St. Louis to Los Angeles Flights
Fastest flight time3h 55m
Cheapest price$133
Chicago to San Jose Flights
Fastest flight time4h 36m
Cheapest price$115
Chicago to Sacramento Flights
Fastest flight time4h 31m
Cheapest price$130
St. Louis to Ontario Flights
Fastest flight time7h 01m
Cheapest price$118
Chicago to Long Beach Flights
Fastest flight time6h 37m
Cheapest price$257

Similar Chicago to Ontario flights

Flexible with your destination? Broaden your search and find flights similar to your Chicago to Ontario route

Why use momondo?

Why should I use momondo to find a flight deal from Chicago to Ontario?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Chicago to Ontario. momondo saves you time and could save you money on your trip.

Can I find flights from Chicago to Ontario with flexible booking policies on momondo?

All flight searches from Chicago to Ontario on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Chicago to Ontario?

momondo helps you find the best flight between Chicago and Ontario by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Chicago to Ontario right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Ontario, momondo offers a useful price alert feature which will track prices for flights to Ontario from Chicago and alert you when they change.


An easier way to manage your Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.