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Cheap flights from Chicago O'Hare Intl Airport to Ontario from $64

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago O'Hare Intl Airport to Ontario departing on 6/4. 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 Chicago O'Hare Intl Airport to Los Angeles

Cheap round-trip flights

These are some of the best round-trip flight deals from Chicago O'Hare Intl Airport to Los Angeles that have been recently found on momondo from popular airlines, departing in the coming months.
6:45 am - 2:27 pmORD-ONT
9h 42m1 stop
11:23 am - 10:07 pmONT-ORD
8h 44m1 stop
$164Frontier
Find Deal
mar., abr. 8 - mié., abr. 16
6:45 am - 2:27 pmORD-ONT
9h 42m1 stop
3:17 pm - 12:10 amONT-ORD
6h 53m1 stop
$166Frontier
Find Deal
mar., abr. 8 - mar., abr. 15
7:10 am - 12:32 pmORD-ONT
7h 22m1 stop
7:00 am - 1:03 pmONT-ORD
4h 03mnonstop
$237United Airlines
Find Deal
mar., jul. 8 - dom., ago. 3
6:55 pm - 11:00 pmORD-ONT
6h 05m1 stop
1:50 pm - 11:05 pmONT-ORD
7h 15m1 stop
$252Southwest
Find Deal
vie., abr. 25 - sáb., abr. 26
7:00 pm - 11:41 pmORD-ONT
6h 41m1 stop
2:35 pm - 11:59 pmONT-ORD
7h 24m1 stop
$257Delta
Find Deal
vie., abr. 25 - jue., may. 1
2:20 pm - 10:43 pmORD-ONT
10h 23m1 stop
7:05 pm - 7:49 amONT-ORD
10h 44m2 stops
$262Delta
Find Deal
jue., may. 1 - jue., may. 8
1:30 pm - 8:59 pmORD-ONT
9h 29m1 stop
7:20 pm - 5:17 amONT-ORD
7h 57m1 stop
$289American Airlines
Find Deal
sáb., abr. 12 - dom., abr. 13
7:55 pm - 10:26 pmORD-ONT
4h 31mnonstop
7:00 am - 1:03 pmONT-ORD
4h 03mnonstop
$317United Airlines
Find Deal
mié., jun. 4 - jue., jun. 12
5:00 am - 11:50 amORD-ONT
8h 50m1 stop
7:25 pm - 5:13 amONT-ORD
7h 48m1 stop
$339American Airlines
Find Deal
jue., may. 22 - lun., may. 26
1:30 pm - 7:30 pmORD-ONT
8h 00m2 stops
5:30 am - 3:25 pmONT-ORD
7h 55m2 stops
$368Southwest
Find Deal
mié., abr. 16 - dom., abr. 20

Frontier flights from Chicago O'Hare Intl Airport to Ontario

Our best Frontier deals on Chicago O'Hare Intl Airport to Ontario flight tickets
Frontier
Apr 8
ORD6:45 amChicago O'Hare Intl
9h 42m
1 stop
ONT2:27 pmOntario
Apr 16
ONT11:23 amOntario
8h 44m
1 stop
ORD10:07 pmChicago O'Hare Intl
Frontier
Apr 8
ORD6:45 amChicago O'Hare Intl
9h 42m
1 stop
ONT2:27 pmOntario
Apr 15
ONT3:17 pmOntario
6h 53m
1 stop
ORD12:10 amChicago O'Hare Intl
Frontier
Apr 1
ORD7:20 amChicago O'Hare Intl
8h 22m
1 stop
ONT1:42 pmOntario
Apr 3
ONT10:53 amOntario
16h 01m
1 stop
ORD4:54 amChicago O'Hare Intl

United Airlines flights from Chicago O'Hare Intl Airport to Ontario

Our best United Airlines deals on Chicago O'Hare Intl Airport to Ontario flight tickets
United Airlines
Jul 8
ORD7:10 amChicago O'Hare Intl
7h 22m
1 stop
ONT12:32 pmOntario
Aug 3
ONT7:00 amOntario
4h 03m
ORD1:03 pmChicago O'Hare Intl
United Airlines
Jun 4
ORD7:55 pmChicago O'Hare Intl
4h 31m
ONT10:26 pmOntario
Jun 12
ONT7:00 amOntario
4h 03m
ORD1:03 pmChicago O'Hare Intl
United Airlines
May 6
ORD6:30 amChicago O'Hare Intl
7h 54m
1 stop
ONT12:24 pmOntario
Jul 30
ONT7:00 amOntario
4h 03m
ORD1:03 pmChicago O'Hare Intl

See travel insights to Los Angeles from

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

In general, October is the cheapest month to fly from Chicago O'Hare Intl Airport to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $217. If you aren’t able to travel during the month of October, then book flights to Ontario from Chicago O'Hare Intl Airport during February instead. Flights to Ontario in February, while not as cheap as those in October, still average around $253.

What is the cheapest day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Saturday when prices can be found for as low as $370. This is often the case because there is less demand to fly during this day of the week. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Chicago O'Hare Intl Airport to Ontario for around $583.

What is the cheapest time of day to depart on your flight to Ontario?

In the evening is the cheapest time of day to fly from Chicago O'Hare Intl Airport to Ontario when you can find flight prices for as low as $318. Flying to Ontario in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $440 on average. Flights to Ontario from Chicago O'Hare Intl Airport in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Chicago O'Hare Intl to Ontario flight route?

Fly from Chicago O'Hare Intl to Ontario for the best Chicago O'Hare Intl - Ontario flight prices

How far in advance should I book a flight to Ontario?

You are more likely to see cheaper flights to Ontario from Chicago O'Hare Intl Airport when booking 8 weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $320 when searching 8 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from Chicago O'Hare Intl Airport for as low as $242 on momondo.

What cabin class options are available on Chicago O'Hare Intl to Ontario flights?

There are 2 cabin classes available to choose from on Chicago O'Hare Intl to Ontario flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

As of March 2025, prices for Chicago O'Hare Intl Airport to Ontario flights are approximately 90% more expensive when compared to flights at the same time last year.

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

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

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

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

Best Price Found

$64

Fastest flight time

4h 31m

Direct flights

Mon, Tue, Wed, Thu, Fri and Sat

Airports in Ontario

1 airport
The best one-way flight to Ontario from Chicago O'Hare Intl Airport in the past 72 hours is $64. The best round-trip flight deal from Chicago O'Hare Intl Airport to Ontario found on momondo in the last 72 hours is $164.
The fastest flight from Chicago O'Hare Intl Airport to Ontario takes 4h 31m
Direct flights go from Chicago O'Hare Intl Airport to Ontario on Monday, Tuesday, Wednesday, Thursday, Friday and Saturday. The only airline offering direct flights is United Airlines.
There is 1 airport near Ontario: Ontario (ONT)

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

    A flight from Chicago O'Hare Intl to Ontario will travel around 1697.7 mi. 4h 31m is a normal flight duration for this route.

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

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

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

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

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

    The travel and health documents you'll need for your trip to Ontario Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

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


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

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to Ontario with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $124Free CancellationRating
6.0
3,273 reviews
Search Frontier flights
American AirlinesPriceFrom $242Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $246Free CancellationRating
8.0
7,908 reviews
Search Delta flights
United AirlinesPriceFrom $256Free CancellationRating
7.4
8,611 reviews
Search United Airlines flights
SouthwestPriceFrom $256Free CancellationRating
8.0
4,280 reviews
Search Southwest flights
  • Southwest Flights From Chicago O'Hare Intl Airport to Ontario

    Southwest operates around 1 flight from Chicago O'Hare Intl Airport to Ontario every week. The average price of these flights found in the last 72 hours has been $505, but momondo users have found Southwest deals from Chicago O'Hare Intl Airport to Ontario from as low as $256 round-trip. Southwest has been scored 8.0/10 in 4,280 reviews.


Why use momondo?

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

Finding the right flight to Ontario from Chicago is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Ontario quick and easy, saving you time and money.

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

Yes. All flights to Ontario from Chicago on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo provides multiple filters to help you find the best flight to Ontario from Chicago. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes. momondo can track prices for Chicago to Ontario flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.


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dom. 3/23
dom. 3/30

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