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Cheap flights from Ontario to Chicago O'Hare Intl Airport from $54

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Chicago O'Hare Intl Airport departing on 1/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Ontario to Chicago

Cheap round-trip flights

These are some of the best round-trip flight deals from Ontario to Chicago that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from Ontario to Chicago.

Cheap last minute flights

Planning a quick getaway from Ontario to Chicago? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to Chicago, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from Ontario to Chicago

Find recent round-trip train or bus tickets from Ontario to Chicago.

All round-trip flight deals to Chicago

The cheapest plane tickets to Chicago found on KAYAK recently.
7:58 pm - 8:24 amONT-ORD
10h 26m1 stop
9:29 am - 6:58 pmORD-ONT
11h 29m1 stop
$108Frontier
Find Deal
Thu, Feb 27 - Mon, Mar 3
7:56 am - 5:25 pmONT-ORD
7h 29m1 stop
6:20 am - 8:46 pmORD-ONT
16h 26m1 stop
$115Frontier
Find Deal
Thu, Feb 6 - Mon, Feb 10
8:29 pm - 5:05 amONT-ORD
6h 36m1 stop
7:59 pm - 7:26 amORD-ONT
13h 27m1 stop
$116Frontier
Find Deal
Sat, Feb 22 - Sat, Mar 1
3:04 pm - 11:59 pmONT-ORD
6h 55m1 stop
11:47 am - 7:31 pmORD-ONT
9h 44m2 stops
$163American Airlines
Find Deal
Tue, Feb 4 - Sat, Feb 8
6:10 am - 3:59 pmONT-ORD
7h 49m1 stop
6:00 am - 11:58 amORD-ONT
7h 58m1 stop
$168American Airlines
Find Deal
Wed, Jan 29 - Mon, Feb 3
1:21 pm - 9:22 pmONT-ORD
6h 01m1 stop
7:20 pm - 11:53 pmORD-ONT
6h 33m1 stop
$256Delta
Find Deal
Fri, Jan 17 - Mon, Jan 20
1:00 pm - 11:59 pmONT-ORD
8h 59m1 stop
1:45 pm - 10:32 pmORD-ONT
10h 47m2 stops
$261Delta
Find Deal
Thu, Jan 23 - Mon, Jan 27
1:45 pm - 11:59 pmONT-ORD
8h 14m1 stop
2:39 pm - 8:51 pmORD-ONT
8h 12m1 stop
$336United Airlines
Find Deal
Fri, Jan 17 - Sat, Jan 18
5:10 am - 1:18 pmONT-ORD
6h 08m1 stop
2:39 pm - 8:51 pmORD-ONT
8h 12m1 stop
$371United Airlines
Find Deal
Sun, Jan 19 - Tue, Jan 21
12:25 pm - 10:35 pmONT-ORD
8h 10m2 stops
6:15 am - 1:25 pmORD-ONT
9h 10m2 stops
$377Southwest
Find Deal
Wed, Feb 19 - Fri, Feb 21
7:56 am - 5:25 pmONT-ORD
7h 29m1 stop
$54Frontier
Find Deal
Thu, Jan 16
7:56 am - 5:25 pmONT-ORD
7h 29m1 stop
$59Frontier
Find Deal
Thu, Jan 30
6:00 am - 2:25 pmONT-ORD
6h 25m1 stop
$79American Airlines
Find Deal
Sat, Jan 25
12:48 pm - 9:13 pmONT-ORD
6h 25m1 stop
$84American Airlines
Find Deal
Sat, Jan 25
6:00 am - 5:29 pmONT-ORD
9h 29m2 stops
$133Delta
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Sat, Jan 18
1:43 pm - 9:25 pmONT-ORD
5h 42m1 stop
$149United Airlines
Find Deal
Tue, Jan 14
7:05 am - 9:15 pmONT-ORD
12h 10m2 stops
$154Delta
Find Deal
Tue, Feb 4
5:10 am - 1:18 pmONT-ORD
6h 08m1 stop
$168United Airlines
Find Deal
Sun, Jan 19
10:20 am - 10:35 pmONT-ORD
10h 15m2 stops
$173Southwest
Find Deal
Mon, Jan 27
5:00 am - 4:45 pmONT-ORD
9h 45m2 stops
$184Southwest
Find Deal
Thu, Jan 16
7:05 pm - 5:40 amONT-ORD
8h 35m1 stop
6:00 am - 11:00 amORD-ONT
7h 00m1 stop
$317Frontier
Find Deal
Sun, Dec 22 - Mon, Jan 6
12:59 am - 10:44 pmONT-ORD
19h 45m1 stop
6:00 am - 11:00 amORD-ONT
7h 00m1 stop
$373Frontier
Find Deal
Fri, Dec 20 - Mon, Jan 6
5:35 am - 2:25 pmONT-ORD
6h 50m1 stop
6:15 am - 5:20 pmORD-ONT
13h 05m1 stop
$492Southwest
Find Deal
Wed, Dec 18 - Thu, Dec 19
6:45 am - 4:45 pmONT-ORD
8h 00m2 stops
6:15 am - 5:20 pmORD-ONT
13h 05m1 stop
$497Southwest
Find Deal
Wed, Dec 18 - Thu, Dec 19
6:10 am - 2:40 pmONT-ORD
6h 30m1 stop
2:39 pm - 8:51 pmORD-ONT
8h 12m1 stop
$498United Airlines
Find Deal
Thu, Dec 19 - Wed, Jan 8
5:05 am - 2:53 pmONT-ORD
7h 48m1 stop
3:40 pm - 9:57 pmORD-ONT
8h 17m1 stop
$507United Airlines
Find Deal
Wed, Dec 18 - Wed, Jan 15
1:15 pm - 9:39 pmONT-ORD
6h 24m1 stop
7:30 am - 12:20 pmORD-ONT
6h 50m1 stop
$518Delta
Find Deal
Fri, Dec 20 - Fri, Jan 3
7:16 am - 5:34 pmONT-ORD
8h 18m1 stop
7:09 am - 1:58 pmORD-ONT
8h 49m1 stop
$564American Airlines
Find Deal
Wed, Dec 18 - Fri, Dec 20
1:15 pm - 9:39 pmONT-ORD
6h 24m1 stop
7:30 am - 12:20 pmORD-ONT
6h 50m1 stop
$598Delta
Find Deal
Sat, Dec 21 - Fri, Jan 3
7:16 am - 5:34 pmONT-ORD
8h 18m1 stop
6:00 am - 12:06 pmORD-ONT
8h 06m1 stop
$1,208American Airlines
Find Deal
Wed, Dec 18 - Fri, Dec 20

Frontier flights from Ontario to Chicago O'Hare Intl Airport

Our best Frontier deals on Ontario to Chicago O'Hare Intl Airport flight tickets
Frontier
Feb 27
ONT7:58 pmOntario
10h 26m
1 stop
ORD8:24 amChicago O'Hare Intl
Mar 3
ORD9:29 amChicago O'Hare Intl
11h 29m
1 stop
ONT6:58 pmOntario
Frontier
Feb 6
ONT7:56 amOntario
7h 29m
1 stop
ORD5:25 pmChicago O'Hare Intl
Feb 10
ORD6:20 amChicago O'Hare Intl
16h 26m
1 stop
ONT8:46 pmOntario
Frontier
Feb 22
ONT8:29 pmOntario
6h 36m
1 stop
ORD5:05 amChicago O'Hare Intl
Mar 1
ORD7:59 pmChicago O'Hare Intl
13h 27m
1 stop
ONT7:26 amOntario

Delta flights from Ontario to Chicago O'Hare Intl Airport

Our best Delta deals on Ontario to Chicago O'Hare Intl Airport flight tickets
Delta
Jan 17
ONT1:21 pmOntario
6h 01m
1 stop
ORD9:22 pmChicago O'Hare Intl
Jan 20
ORD7:20 pmChicago O'Hare Intl
6h 33m
1 stop
ONT11:53 pmOntario
Delta
Jan 23
ONT1:00 pmOntario
8h 59m
1 stop
ORD11:59 pmChicago O'Hare Intl
Jan 27
ORD1:45 pmChicago O'Hare Intl
10h 47m
2 stops
ONT10:32 pmOntario
Delta
Jan 23
ONT6:00 amOntario
10h 25m
2 stops
ORD6:25 pmChicago O'Hare Intl
Jan 24
ORD1:40 pmChicago O'Hare Intl
12h 13m
2 stops
ONT11:53 pmOntario

See travel insights to Chicago from

How to get the cheapest flight ticket from Ontario to Chicago O'Hare Intl Airport

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 to Chicago O'Hare Intl Airport?

The month of September is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from Ontario averaging around $275.

What is the cheapest day to depart on your flight to Chicago O'Hare Intl Airport?

The cheapest day to depart on your flight to Chicago O'Hare Intl Airport is on a Tuesday when prices can be found for as low as $290. This is often the case because there is less demand to fly during this day of the week. On the other hand, Sunday is the most expensive day to depart from Ontario because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $377.

What is the cheapest time of day to depart on your flight to Chicago O'Hare Intl Airport?

Flying to Chicago O'Hare Intl Airport from Ontario in the evening is the least expensive time of day to depart. momondo users have found prices as low as $279 when looking at flights departing in the evening. Try not to purchase tickets at noon because they tend to be around $361. Of course, these prices can vary depending on the time of year and what airport you fly to.

How far in advance should I book a flight to Chicago O'Hare Intl Airport?

In general, most travelers find the cheapest time to book a flight to Chicago O'Hare Intl Airport is about 15 days prior to their departure date when tickets on average are $345. Don’t hesitate to check prices now though because momondo users recently found tickets for as low as $140.

Can stopping save me money on Ontario to Chicago O'Hare Intl Airport flights?

You could potentially save up to 59% on your flight if you consider stops on a Ontario to Chicago O'Hare Intl Airport flight.

How have Ontario to Chicago O'Hare Intl Airport flight prices changed over time?

As of December 2024, prices for Ontario to Chicago O'Hare Intl Airport flights are approximately 21% cheaper when compared to flights at the same time last year.

When to book flights from Ontario to Chicago O'Hare Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Chicago O'Hare Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Chicago O'Hare Intl Airport (ONT to ORD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Chicago O'Hare Intl Airport

Best Price Found

$54

Fastest flight time

5h 42m

Direct flights

None
The best one-way flight to Chicago O'Hare Intl Airport from Ontario in the past 72 hours is $54. The best round-trip flight deal from Ontario to Chicago O'Hare Intl Airport found on momondo in the last 72 hours is $108.
The fastest flight from Ontario to Chicago O'Hare Intl Airport takes 5h 42m
There are no direct flights from Ontario to Chicago O'Hare Intl Airport. Popular non-direct route for this connection is Ontario Airport - Chicago O'Hare Intl Airport.

  • How far is Ontario to Chicago O'Hare Intl by plane?

    Chicago O'Hare Intl is 1697.7 mi away from Ontario. In terms of flight time, this usually takes a little over 5h 44m.

  • When did momondo last update prices for flights from Ontario Airport to Chicago O'Hare Intl Airport?

    Prices for flights from Ontario Airport to Chicago O'Hare Intl Airport are updated daily.

  • How many operators does momondo search for flights from Ontario Airport to Chicago O'Hare Intl Airport?

  • How old do you have to be to fly from Ontario Airport to Chicago O'Hare Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ontario Airport to Chicago O'Hare Intl Airport.

  • What documentation or ID do you need to fly to Chicago O'Hare Intl Airport?

    The necessary travel and health documents for your Chicago O'Hare Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Ontario to Chicago O'Hare Intl Airport?


Best airlines flying from Ontario to Chicago O'Hare Intl Airport

Compare and see reviews for airlines that fly from Ontario to Chicago O'Hare Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $92Free CancellationRating
6.3
8,120 reviews
Search Spirit Airlines flights
FrontierPriceFrom $109Free CancellationRating
6.1
3,480 reviews
Search Frontier flights
DeltaPriceFrom $236Free CancellationRating
8.0
8,615 reviews
Search Delta flights
American AirlinesPriceFrom $254Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $273Free CancellationRating
7.4
9,070 reviews
Search United Airlines flights
SouthwestPriceFrom $358Free CancellationRating
8.1
4,854 reviews
Search Southwest flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Chicago from Ontario.

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

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

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

Once all potential Ontario to Chicago flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

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


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