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Cheap flights from Chicago O'Hare Intl Airport to Los Angeles from $61

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 Los Angeles departing on 4/1. 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

Enter your travel dates to find the best prices.
Frontier Logo
10:53 am - 11:59 pm
ORD
-
ONT
15h 06m
1 stop
Frontier Logo
4:49 pm - 6:08 am
ONT
-
ORD
11h 19m
1 stop
$161Frontier
jue., mar. 12 - mar., mar. 17
Frontier Logo
9:15 am - 1:11 pm
ORD
-
ONT
29h 56m
2 stops
Frontier Logo
4:49 pm - 6:08 am
ONT
-
ORD
11h 19m
1 stop
$166Frontier
mar., mar. 3 - mar., mar. 10
Frontier Logo
4:42 pm - 7:26 am
ORD
-
ONT
40h 44m
2 stops
Frontier Logo
7:22 pm - 5:26 pm
ONT
-
ORD
20h 04m
1 stop
$171Frontier
jue., feb. 19 - jue., feb. 26
Frontier Logo
4:16 pm - 11:59 pm
ORD
-
ONT
9h 43m
1 stop
Frontier Logo
8:21 am - 11:17 pm
ONT
-
ORD
12h 56m
1 stop
$180Frontier
jue., feb. 19 - sáb., feb. 21
Frontier Logo
6:07 pm - 9:34 pm
ORD
-
ONT
29h 27m
2 stops
Frontier Logo
2:08 pm - 11:14 pm
ONT
-
ORD
7h 06m
1 stop
$181Frontier
mar., feb. 10 - jue., feb. 12
Frontier Logo
11:51 am - 9:34 am
ORD
-
ONT
23h 43m
2 stops
Frontier Logo
4:49 pm - 6:08 am
ONT
-
ORD
11h 19m
1 stop
$188Frontier
mié., mar. 4 - mar., mar. 10
Frontier Logo
7:00 am - 8:06 am
ORD
-
ONT
27h 06m
2 stops
Frontier Logo
4:49 pm - 6:08 am
ONT
-
ORD
11h 19m
1 stop
$191Frontier
jue., mar. 12 - mar., mar. 17
Frontier Logo
5:40 am - 12:23 pm
ORD
-
ONT
8h 43m
1 stop
Frontier Logo
7:17 pm - 9:03 pm
ONT
-
ORD
23h 46m
1 stop
$193Frontier
lun., feb. 16 - mié., feb. 18
Frontier Logo
5:40 am - 12:23 pm
ORD
-
ONT
8h 43m
1 stop
Frontier Logo
2:06 pm - 9:03 pm
ONT
-
ORD
28h 57m
1 stop
$194Frontier
lun., feb. 16 - mié., feb. 18
Frontier Logo
12:53 pm - 11:59 pm
ORD
-
ONT
13h 06m
1 stop
Frontier Logo
8:21 am - 11:17 pm
ONT
-
ORD
12h 56m
1 stop
$195Frontier
vie., feb. 20 - sáb., feb. 21

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
Mar 12
ORD10:53 amChicago O'Hare Intl
15h 06m
1 stop
ONT11:59 pmOntario
Mar 17
ONT4:49 pmOntario
11h 19m
1 stop
ORD6:08 amChicago O'Hare Intl
$161
Frontier
Mar 3
ORD9:15 amChicago O'Hare Intl
29h 56m
2 stops
ONT1:11 pmOntario
Mar 10
ONT4:49 pmOntario
11h 19m
1 stop
ORD6:08 amChicago O'Hare Intl
$166
Frontier
Feb 19
ORD4:42 pmChicago O'Hare Intl
40h 44m
2 stops
ONT7:26 amOntario
Feb 26
ONT7:22 pmOntario
20h 04m
1 stop
ORD5:26 pmChicago O'Hare Intl
$171

Delta flights from Chicago O'Hare Intl Airport to Ontario

Our best Delta deals on Chicago O'Hare Intl Airport to Ontario flight tickets
Delta
Jan 30
ORD6:40 pmChicago O'Hare Intl
7h 18m
1 stop
ONT11:58 pmOntario
Feb 11
ONT6:00 amOntario
5h 38m
1 stop
ORD1:38 pmChicago O'Hare Intl
$521
Delta
Jan 31
ORD7:30 amChicago O'Hare Intl
8h 26m
1 stop
ONT1:56 pmOntario
Feb 6
ONT1:11 pmOntario
6h 41m
1 stop
ORD9:52 pmChicago O'Hare Intl
$610
Delta
Jan 31
ORD5:30 amChicago O'Hare Intl
8h 01m
1 stop
ONT11:31 amOntario
Feb 4
ONT10:30 pmOntario
9h 35m
1 stop
ORD10:05 amChicago O'Hare Intl
$648

momondo Fare Finder

 
Customize your flight search to find flights from Chicago O'Hare Intl Airport to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated enero 21, 2026.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

jue. 3/12

10:53 am-11:59 pm

1 stop15h 06m

Ontario

mar. 3/17

4:49 pm-6:08 am

1 stop11h 19m

$161

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

mar. 3/3

9:15 am-1:11 pm

2 stops29h 56m

Ontario

mar. 3/10

4:49 pm-6:08 am

1 stop11h 19m

$166

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

jue. 2/19

4:42 pm-7:26 am

2 stops40h 44m

Ontario

jue. 2/26

7:22 pm-5:26 pm

1 stop20h 04m

$171

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

jue. 2/19

4:16 pm-11:59 pm

1 stop9h 43m

Ontario

sáb. 2/21

8:21 am-11:17 pm

1 stop12h 56m

$180

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

mar. 2/10

6:07 pm-9:34 pm

2 stops29h 27m

Ontario

jue. 2/12

2:08 pm-11:14 pm

1 stop7h 06m

$181

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

mié. 3/4

11:51 am-9:34 am

2 stops23h 43m

Ontario

mar. 3/10

4:49 pm-6:08 am

1 stop11h 19m

$188

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

jue. 3/12

7:00 am-8:06 am

2 stops27h 06m

Ontario

mar. 3/17

4:49 pm-6:08 am

1 stop11h 19m

$191

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

lun. 2/16

5:40 am-12:23 pm

1 stop8h 43m

Ontario

mié. 2/18

7:17 pm-9:03 pm

1 stop23h 46m

$193

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

lun. 2/16

5:40 am-12:23 pm

1 stop8h 43m

Ontario

mié. 2/18

2:06 pm-9:03 pm

1 stop28h 57m

$194

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

vie. 2/20

12:53 pm-11:59 pm

1 stop13h 06m

Ontario

sáb. 2/21

8:21 am-11:17 pm

1 stop12h 56m

$195

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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, April 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 $246. If you aren’t able to travel during the month of April, 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 April, still average around $268.

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 Sunday when prices can be found for as low as $382. This is often the case because there is less demand to fly during this day of the week. When flying out on a Saturday, 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 $499.

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

At noon 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 $379. Flying to Ontario at noon 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 morning when prices are $502 on average. Flights to Ontario from Chicago O'Hare Intl Airport in the morning 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 weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $366 when searching 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 $227 on momondo.

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

There are 4 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.

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

You could potentially save up to 18% on your flight if you consider stops on a Chicago O'Hare Intl Airport to Ontario flight.

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

As of January 2026, prices for Chicago O'Hare Intl Airport to Ontario flights are approximately 37% 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

Fastest flight time

4h 26m

Direct flights

Every day

Airports in Ontario

1 airport
The fastest flight from Chicago O'Hare Intl Airport to Ontario takes 4h 26m
Direct flights go from Chicago O'Hare Intl Airport to Ontario every day.
There is 1 airport in Ontario. From Chicago O'Hare Intl Airport there are direct flights to Ontario (ONT).
Search flight deals

  • 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 26m 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 $125Free CancellationRating
5.7
3,057 reviews
Search Frontier flights
American AirlinesPriceFrom $231Free CancellationRating
7.2
11,174 reviews
Search American Airlines flights
United AirlinesPriceFrom $237Free CancellationRating
7.4
9,191 reviews
Search United Airlines flights
SouthwestPriceFrom $246Free CancellationRating
8.0
4,266 reviews
Search Southwest flights
DeltaPriceFrom $256Free CancellationRating
7.9
8,089 reviews
Search Delta flights

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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