HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news

Cheap flights from Ontario (ONT) to O'Hare Intl (ORD) from $63

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/21. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
ONT — ORD
may. 21 — may. 281
From?
To?
mar. 5/21
mar. 5/28
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

The best prices from Ontario to Chicago O'Hare Intl are usually found in May or April, booked 42 days in advance, depart on a Tuesday or Wednesday and return on a Thursday

Cheap flight deals from Ontario to O'Hare Intl

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to O'Hare Intl (ORD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated mayo 16, 2024.

Popular in

August

Cheapest in

May

Round-trip from

$223

One-way from

$63
High demand for flights, 16% potential price rise
Search Deals
Best time to find cheap flights, 20% potential price drop
Search Deals
From Ontario to Chicago O'Hare Intl
Search Deals
One-way flight from Ontario to Chicago O'Hare Intl
Search Deals

What is the cheapest day to fly round-trip from Ontario to Chicago O'Hare Intl Airport?

Users have found that leaving on a Monday can be a cost-effective option. It’s possible to save up to 28% on your flight compared to booking on days when demand is much higher.

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

Find a great deal and save up to 73% by booking at least 31 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Ontario to Chicago O'Hare Intl Airport within the next two weeks, with the cheapest ticket starting at $319.

What is the cheapest month to fly from Ontario to Chicago O'Hare Intl Airport?

January is one of the best times of the year to fly to Chicago O'Hare Intl Airport from Ontario. Prices for January average $314 per person but you can even find prices for as low as $135. The most expensive prices can be found in the month of March. Opting for a January flight can save you 20% on your journey compared to booking in March

When is the cheapest time to fly from Ontario to Chicago O'Hare Intl Airport (ONT - ORD)?

It’s typically best to fly out from Ontario to Chicago O'Hare Intl Airport in the afternoon. Doing so could potentially save you 15% on the flight price compared to flying in the morning, which is usually more expensive.

Cheap Frontier flights from Ontario to O'Hare Intl

Explore cheap flight options specifically provided by Frontier for the route between Ontario and O'Hare Intl. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,637,452 searches. Data last updated mayo 16, 2024.
Peruse some of the lowest-priced Frontier flights we've found from Ontario to Chicago. It's recommended that users confirm their flight details before booking.
mar. 8/2712:49 amONT - ORD
1 stop22h 14mFrontier
mar. 9/38:00 amORD - ONT
1 stop17h 39mFrontier
Deal found 5/14$137
mar. 8/2012:00 pmONT - ORD
1 stop14h 47mFrontier
sáb. 8/247:30 pmORD - ONT
1 stop13h 38mFrontier
Deal found 5/16$138
mar. 5/2812:59 amONT - ORD
1 stop22h 14mFrontier
mié. 6/58:23 pmORD - ONT
1 stop12h 40mFrontier
Deal found 5/15$139
mar. 8/2012:00 pmONT - ORD
1 stop14h 47mFrontier
dom. 8/257:30 pmORD - ONT
1 stop15h 36mFrontier
Deal found 5/16$140
vie. 5/3112:59 amONT - ORD
1 stop21h 19mFrontier
mar. 6/47:59 pmORD - ONT
1 stop23h 49mFrontier
Deal found 5/15$141
mar. 8/205:30 pmONT - ORD
1 stop9h 17mFrontier
jue. 8/227:30 pmORD - ONT
1 stop15h 36mFrontier
Deal found 5/14$142
lun. 8/198:35 pmONT - ORD
1 stop6h 12mFrontier
sáb. 8/245:56 pmORD - ONT
1 stop7h 48mFrontier
Deal found 5/16$143
dom. 6/211:30 pmONT - ORD
1 stop27h 30mFrontier
mié. 6/129:53 pmORD - ONT
1 stop28h 06mFrontier
Deal found 5/16$144
vie. 5/318:54 pmONT - ORD
1 stop25h 24mFrontier
sáb. 6/88:35 pmORD - ONT
1 stop12h 28mFrontier
Deal found 5/15$145

Cheap Delta flights from Ontario to O'Hare Intl

Explore cheap flight options specifically provided by Delta for the route between Ontario and O'Hare Intl. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,637,452 searches. Data last updated mayo 16, 2024.
Some of the lowest-priced Delta flights we've found at this time heading from Ontario to Chicago. If these deals don't fit your criteria, make sure to check back soon as new deals are always added.
vie. 5/311:20 pmONT - ORD
1 stop6h 12mDelta
sáb. 6/81:25 pmORD - ONT
2 stops11h 35mDelta
Deal found 5/15$284
vie. 5/3110:00 pmONT - ORD
2 stops8h 59mDelta
sáb. 6/81:25 pmORD - ONT
2 stops11h 35mDelta
Deal found 5/15$289
mié. 5/226:50 amONT - ORD
1 stop10h 51mDelta
mié. 5/2911:45 amORD - ONT
2 stops10h 21mDelta
Deal found 5/15$295
jue. 5/231:20 pmONT - ORD
1 stop6h 12mDelta
dom. 5/265:15 pmORD - ONT
1 stop6h 24mDelta
Deal found 5/16$322
jue. 5/231:20 pmONT - ORD
1 stop6h 12mDelta
dom. 5/266:07 amORD - ONT
2 stops8h 06mDelta
Deal found 5/16$327
mar. 5/212:13 pmONT - ORD
1 stop7h 52mDelta
lun. 5/276:07 amORD - ONT
2 stops8h 06mDelta
Deal found 5/14$405
mié. 5/226:42 pmONT - ORD
2 stops11h 57mDelta
mié. 5/298:45 amORD - ONT
2 stops13h 21mDelta
Deal found 5/15$494
jue. 5/2312:50 pmONT - ORD
1 stop9h 05mDelta
lun. 5/276:07 amORD - ONT
2 stops8h 06mDelta
Deal found 5/15$495
mar. 5/216:50 amONT - ORD
2 stops12h 42mDelta
dom. 5/266:07 amORD - ONT
2 stops8h 06mDelta
Deal found 5/16$500

Cheap Ontario to O'Hare Intl flights in May & June 2024

Find cheap flight options from Ontario to O'Hare Intl specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,637,452 searches. Prices were last updated on mayo 16, 2024.
Check out some of the best flight deals from Ontario to Chicago in 2024. Check back soon for alternative fares.
mar. 5/2812:59 amONT - ORD
1 stop22h 14mFrontier
mié. 6/58:23 pmORD - ONT
1 stop12h 40mFrontier
Deal found 5/15$139
sáb. 5/255:41 pmONT - ORD
1 stop9h 19mFrontier
mié. 5/296:45 pmORD - ONT
1 stop7h 14mFrontier
Deal found 5/16$140
vie. 5/2412:59 amONT - ORD
1 stop21h 19mFrontier
mié. 5/297:59 pmORD - ONT
1 stop15h 35mFrontier
Deal found 5/16$141
sáb. 5/255:41 pmONT - ORD
1 stop9h 19mFrontier
mar. 5/287:59 pmORD - ONT
1 stop15h 05mFrontier
Deal found 5/15$142
vie. 5/2412:59 amONT - ORD
1 stop21h 19mFrontier
mar. 5/287:59 pmORD - ONT
1 stop18h 56mFrontier
Deal found 5/15$143
sáb. 6/112:59 amONT - ORD
1 stop19h 36mFrontier
mar. 6/118:23 pmORD - ONT
1 stop23h 25mFrontier
Deal found 5/15$144
sáb. 5/255:41 pmONT - ORD
1 stop9h 19mFrontier
jue. 5/307:59 pmORD - ONT
1 stop24h 24mFrontier
Deal found 5/16$145
jue. 5/306:11 pmONT - ORD
1 stop8h 49mFrontier
mié. 6/58:23 pmORD - ONT
1 stop12h 40mFrontier
Deal found 5/15$147
mar. 5/2812:59 amONT - ORD
1 stop22h 14mFrontier
jue. 5/308:00 amORD - ONT
1 stop17h 59mFrontier
Deal found 5/14$148

Ontario to O'Hare Intl 2024 flight deals

Discover exclusive flight deals for travel between Ontario and O'Hare Intl in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,637,452 searches. Data last updated mayo 16, 2024.
Check out some of the best flight deals from Ontario to Chicago in 2024. Check back soon for alternative fares.
mar. 8/2712:49 amONT - ORD
1 stop22h 14mFrontier
mar. 9/38:00 amORD - ONT
1 stop17h 39mFrontier
Deal found 5/14$137
mar. 8/2012:00 pmONT - ORD
1 stop14h 47mFrontier
sáb. 8/247:30 pmORD - ONT
1 stop13h 38mFrontier
Deal found 5/16$138
mar. 5/2812:59 amONT - ORD
1 stop22h 14mFrontier
mié. 6/58:23 pmORD - ONT
1 stop12h 40mFrontier
Deal found 5/15$139
mar. 8/2012:00 pmONT - ORD
1 stop14h 47mFrontier
dom. 8/257:30 pmORD - ONT
1 stop15h 36mFrontier
Deal found 5/16$140
vie. 5/2412:59 amONT - ORD
1 stop21h 19mFrontier
mié. 5/297:59 pmORD - ONT
1 stop15h 35mFrontier
Deal found 5/16$141
sáb. 5/255:41 pmONT - ORD
1 stop9h 19mFrontier
mar. 5/287:59 pmORD - ONT
1 stop15h 05mFrontier
Deal found 5/15$142
lun. 8/198:35 pmONT - ORD
1 stop6h 12mFrontier
sáb. 8/245:56 pmORD - ONT
1 stop7h 48mFrontier
Deal found 5/16$143
sáb. 6/112:59 amONT - ORD
1 stop19h 36mFrontier
mar. 6/118:23 pmORD - ONT
1 stop23h 25mFrontier
Deal found 5/15$144
sáb. 5/255:41 pmONT - ORD
1 stop9h 19mFrontier
jue. 5/307:59 pmORD - ONT
1 stop24h 24mFrontier
Deal found 5/16$145

Ontario to O'Hare Intl flights leaving soon

Find last-minute flight options from Ontario to O'Hare Intl for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,637,452 searches. Data last updated mayo 16, 2024.
Have a look at some of the last-minute flights available departing from Ontario to Chicago. Users should be sure to double check the price, date, and time of their last-minute flight.
mar. 5/2112:59 amONT - ORD
1 stop22h 14mFrontier
mié. 5/296:45 pmORD - ONT
1 stop7h 14mFrontier
Deal found 5/15$139
sáb. 5/255:41 pmONT - ORD
1 stop9h 19mFrontier
mié. 5/296:45 pmORD - ONT
1 stop7h 14mFrontier
Deal found 5/16$140
vie. 5/2412:59 amONT - ORD
1 stop21h 19mFrontier
mié. 5/297:59 pmORD - ONT
1 stop15h 35mFrontier
Deal found 5/16$141
sáb. 5/255:41 pmONT - ORD
1 stop9h 19mFrontier
mar. 5/287:59 pmORD - ONT
1 stop15h 05mFrontier
Deal found 5/15$142
vie. 5/2412:59 amONT - ORD
1 stop21h 19mFrontier
mar. 5/287:59 pmORD - ONT
1 stop18h 56mFrontier
Deal found 5/15$143
sáb. 5/255:41 pmONT - ORD
1 stop9h 19mFrontier
jue. 5/307:59 pmORD - ONT
1 stop24h 24mFrontier
Deal found 5/16$145
mar. 5/2112:59 amONT - ORD
1 stop22h 14mFrontier
jue. 5/307:59 pmORD - ONT
1 stop24h 24mFrontier
Deal found 5/15$147
jue. 5/2311:07 pmONT - ORD
1 stop28h 03mFrontier
sáb. 5/257:59 pmORD - ONT
1 stop15h 33mFrontier
Deal found 5/15$149
vie. 5/2412:59 amONT - ORD
1 stop21h 19mFrontier
sáb. 6/17:59 pmORD - ONT
1 stop15h 35mFrontier
Deal found 5/16$151

One-way flights to O'Hare Intl from Ontario

Search for one-way flight options from Ontario to O'Hare Intl. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,637,452 searches. Data last updated mayo 16, 2024.
Users traveling one-way from Ontario to Chicago can select one of these great deals. Users in need of a round-trip flight from Ontario to Chicago instead should update the search form at the top of page.
mar. 5/2112:59 amONT - ORD
1 stop22h 14mFrontier
Deal found 5/15$63
mié. 8/288:35 pmONT - ORD
1 stop6h 12mFrontier
Deal found 5/15$70
mié. 6/58:55 pmONT - ORD
1 stop6h 28mFrontier
Deal found 5/15$71
mar. 5/2810:42 pmONT - ORD
1 stop28h 18mFrontier
Deal found 5/15$73
mar. 6/48:29 pmONT - ORD
1 stop6h 31mFrontier
Deal found 5/15$74
sáb. 6/87:15 pmONT - ORD
1 stop8h 22mFrontier
Deal found 5/16$75
sáb. 5/255:41 pmONT - ORD
1 stop9h 19mFrontier
Deal found 5/15$76
mar. 8/138:35 pmONT - ORD
1 stop6h 12mFrontier
Deal found 5/15$77
vie. 7/1912:39 amONT - ORD
1 stop20h 19mFrontier
Deal found 5/16$78

Find flights from Ontario to O'Hare Intl within your budget

Customize your flight search to find flights from Ontario to O'Hare Intl 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, Cheapflights users made 2,637,452 searches. Data last updated mayo 16, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$137 - $284

Route

Depart

Return

Price

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

mar. 8/27

1 stop22h 14m

Chicago O'Hare Intl

mar. 9/3

1 stop17h 39m

$137

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

mar. 8/20

1 stop14h 47m

Chicago O'Hare Intl

sáb. 8/24

1 stop13h 38m

$138

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

mar. 5/28

1 stop22h 14m

Chicago O'Hare Intl

mié. 6/5

1 stop12h 40m

$139

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

mar. 8/20

1 stop14h 47m

Chicago O'Hare Intl

dom. 8/25

1 stop15h 36m

$140

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

vie. 5/31

1 stop21h 19m

Chicago O'Hare Intl

mar. 6/4

1 stop23h 49m

$141

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

mar. 8/20

1 stop9h 17m

Chicago O'Hare Intl

jue. 8/22

1 stop15h 36m

$142

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

lun. 8/19

1 stop6h 12m

Chicago O'Hare Intl

sáb. 8/24

1 stop7h 48m

$143

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

dom. 6/2

1 stop27h 30m

Chicago O'Hare Intl

mié. 6/12

1 stop28h 06m

$144

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

vie. 5/31

1 stop6h 12m

Chicago O'Hare Intl

sáb. 6/8

2 stops11h 35m

$284

Flights are sorted by cheapest first

Deals found on 5/14

When is the best time to book a flight from Ontario to Chicago O'Hare Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to O'Hare Intl. Price data was last updated on May 10, 2024.
The price you pay for your flight from Ontario to Chicago O'Hare Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 42 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Search Deals

When is the cheapest time to fly from Ontario to Chicago O'Hare Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Ontario to O'Hare Intl. Price data was last updated on May 12, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Ontario to Chicago O'Hare Intl Airport flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to O'Hare Intl by month

Plan your trip from Ontario to O'Hare Intl by taking into account the cheapest months to travel. The average price of a one-way flight from Ontario to O'Hare Intl is currently $73 while a round-trip flight costs $156. Price data was last updated on May 12, 2024.

Currently, February is the cheapest month in which you can book a flight from Ontario to Chicago O'Hare Intl Airport (average of $244). Flying from Ontario to Chicago O'Hare Intl Airport in June is currently the most expensive (average of $342). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

January

$248

February

$244

March

$280

April

$258

May

$278

June

$342

July

$327

August

$274

September

$258

October

$248

November

$270

December

$248

Temperature and rainfall in O'Hare Intl by month

Plan your trip to O'Hare Intl by taking into account the average temperature and rainfall totals by month.

CHI

Temperature

23 - 73.4 °F

Reviews of airlines servicing O'Hare Intl

Get insights into the airlines that provide service to O'Hare Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to O'Hare Intl. Reviews last updated mayo 16, 2024.
Read through reviews of airlines operating flights from Ontario to Chicago, such as Frontier, Delta and American Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.2
Very good
6,040 reviews
Check prices

Entertainment

7.8

Boarding

8.3

Comfort

8.1

Food

7.3

Crew

8.7

Overall

8.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Southwest
8.2
Very good
6,040 reviews
Southwest
8.2
Very good
6,040 reviews
Check prices

Entertainment

7.8

Boarding

8.3

Comfort

8.1

Food

7.3

Crew

8.7

Overall

8.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Alaska Airlines
8.1
Very good
9,157 reviews
Southwest
8.2
Very good
6,040 reviews
Check prices

Entertainment

7.8

Boarding

8.3

Comfort

8.1

Food

7.3

Crew

8.7

Overall

8.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Delta
8.0
Very good
10,673 reviews
Southwest
8.2
Very good
6,040 reviews
Check prices

Entertainment

7.8

Boarding

8.3

Comfort

8.1

Food

7.3

Crew

8.7

Overall

8.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

United Airlines
7.4
Good
10,924 reviews
Southwest
8.2
Very good
6,040 reviews
Check prices

Entertainment

7.8

Boarding

8.3

Comfort

8.1

Food

7.3

Crew

8.7

Overall

8.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

American Airlines
7.3
Good
14,514 reviews
Southwest
8.2
Very good
6,040 reviews
Check prices

Entertainment

7.8

Boarding

8.3

Comfort

8.1

Food

7.3

Crew

8.7

Overall

8.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Related info for your journey

Find useful and relevant information for your journey from Ontario to O'Hare Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Chicago O'Hare Intl?

    Located just 3.1 mi from the city center, Ontario is the airport most travelers will use when flying to Chicago O'Hare Intl from Ontario. Booking flights from Ontario (ONT) to Chicago O'Hare Intl should be relatively easy as there are 0 daily outbound flights to Chicago O'Hare Intl from 5 different airlines.

  • Can I find flights from Ontario to Chicago O'Hare Intl Airport for under $200 on Cheapflights?

    Yes, there are multiple flights from Ontario to Chicago O'Hare Intl Airport for under $200. The cheapest flight booked recently is on Frontier for just $137, but on average you can expect to pay $146.

  • Are there last-minute flights available from Ontario to Chicago O'Hare Intl Airport for under $200?

    There are currently 20+ open flights from Ontario to Chicago O'Hare Intl Airport within the next 7 days for less than $200.

  • What is the cheapest airline to fly from Ontario to Chicago O'Hare Intl Airport round-trip?

    Our cheapest airline available from Ontario to Chicago O'Hare Intl Airport is Frontier. Our recent data shows that you can find tickets from as low as $137 on this airline. Frontier is currently priced 64% below the average price you’ll pay for this route.

  • What are the most popular airlines that fly from Ontario to Chicago O'Hare Intl Airport?

    When booking a flight from Ontario to Chicago O'Hare Intl Airport, you may want to consider flying on American Airlines, Delta or Frontier as they are the most popular for this route.

  • What does ONT to ORD mean?

    ONT stands for Ontario Airport, while ORD stands for Chicago O'Hare Intl Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry.

  • Can I find deals for flights from Ontario to O'Hare Intl that include extra baggage allowance?

    The amount of baggage you can bring on your Ontario to O'Hare Intl flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Ontario to O'Hare Intl with specific airlines?

    Yes, Cheapflights allows you to browse and filter Ontario to O'Hare Intl flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Ontario to O'Hare Intl that include hotel bookings?

    Yes. In addition to deals on Ontario to O'Hare Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to O'Hare Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to O'Hare Intl.

  • Can I find deals for business class flights from Ontario to O'Hare Intl?

    Yes. Cheapflights offers flight deals from Ontario to O'Hare Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Ontario to O'Hare Intl that allow pets onboard?

    Many airlines flying from Ontario to O'Hare Intl offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Ontario to O'Hare Intl?

    Yes, you can often find last-minute deals on Ontario to O'Hare Intl flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Ontario to Chicago O'Hare Intl Airport flight deals updated?

    The Ontario to Chicago O'Hare Intl Airport flight deals you see on this page were last updated on 5/16.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to O'Hare Intl
See prices for flight routes from nearby airports that may be better suited for you.

Los Angeles to O'Hare Intl flights
San Francisco to O'Hare Intl flights
Los Angeles to Midway flights
Santa Ana to O'Hare Intl flights
Burbank to O'Hare Intl flights
San Diego to O'Hare Intl flights
Oakland to O'Hare Intl flights
Ontario to Midway flights
San Diego to Midway flights
Las Vegas to O'Hare Intl flights
San Jose to O'Hare Intl flights
Santa Ana to Midway flights
San Francisco to Midway flights
Sacramento to O'Hare Intl flights
Long Beach to O'Hare Intl flights
San Jose to Midway flights
Sacramento to Midway flights
Las Vegas to Midway flights
Oakland to Midway flights
Fresno to O'Hare Intl flights
Palm Springs to O'Hare Intl flights
Burbank to Midway flights
Reno to O'Hare Intl flights
Los Angeles to Rockford flights
Fresno to Midway flights
Santa Barbara to O'Hare Intl flights
Palm Springs to Midway flights
Monterey to O'Hare Intl flights
Reno to Midway flights
Long Beach to Midway flights
San Luis Obispo to O'Hare Intl flights
Medford to O'Hare Intl flights
Oakland to Rockford flights
San Jose to Rockford flights
Las Vegas to Rockford flights
Santa Rosa to O'Hare Intl flights
Bakersfield to O'Hare Intl flights
San Diego to Rockford flights
Medford to Midway flights
Burbank to Rockford flights
Tijuana to O'Hare Intl flights
Sacramento to Rockford flights
Yuma to O'Hare Intl flights
Redding to O'Hare Intl flights
Arcata to O'Hare Intl flights
Tijuana to Midway flights
Bakersfield to Midway flights
Ontario to Rockford flights

Top 5 airlines flying from Ontario to O'Hare Intl

Discover the top 5 airlines that operate flights from Ontario to O'Hare Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,637,452 searches. Data last updated mayo 16, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$105Average$200FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
FrontierCheapest$148Average$217FlexibilityNo cancel feeOn-time62%
Search Frontier flights
United AirlinesCheapest$245Average$471FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
DeltaCheapest$276Average$364FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
American AirlinesCheapest$297Average$427FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Charlotte to Dallas flights
Cincinnati to Chicago flights
Jamaica to England flights
New York to Tel Aviv flights
Denver to London flights
Los Angeles to El Salvador flights
Atlanta to Phoenix flights
Phoenix to Austin flights
USA to Bora Bora flights
San Francisco to Vancouver flights
Seattle to Denver flights
Ontario to Norfolk flights

Search flights from Ontario to O'Hare Intl by cabin class

Find flights from Ontario to O'Hare Intl, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

Hourly flight availability from Ontario to O'Hare Intl

Find hourly flight availability from Ontario to O'Hare Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated mayo 16, 2024.
0%of flight departuresEarly morningMidnight to 6 am
0%of flight departuresMorning6 am to noon
100%of flight departuresAfternoonNoon to 6 pm
0%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Noon
6 PM

Book a flight to one of these trending destinations

User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations
Flights to Montes Claros
Flights to Girona Costa Brava
Flights to Naxos
Flights to Bourgas
Flights to Hyannis Barnstable
Flights to Samos
Flights to Reggio Calabria Tito Menniti
Flights to Devils Lake
Flights to Ningbo Lishe Intl
Flights to Pellston Emmet County
Flights to Provincetown
Flights to Cortez Montezuma County
Flights to Ohrid
Flights to Oran Es Senia
Flights to Menorca/Mahon
Flights to Hakodate
Flights to Ordu/Giresun
Flights to Laayoune Hassan I
Flights to Cornwall Newquay
Flights to Melilla
Flights to Rennes St Jacques
Flights to Parikia Paros
Flights to Constanţa Mihail Kogalniceanu
Flights to Miyakojima Hirara

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ontario to O'Hare Intl?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ontario to O'Hare Intl. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Ontario to O'Hare Intl?

Cheapflights helps you find that perfect flight to O'Hare Intl from Ontario by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Ontario to O'Hare Intl with no change fees?

Yes, we can. To see specific flights from Ontario to O'Hare Intl with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Ontario to O'Hare Intl become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to O'Hare Intl from Ontario today and book when prices fit your budget.

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
View all available airlines