HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news

Cheap flights from Ontario (ONT) to O'Hare Intl (ORD) from $59

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 5/22. 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 12 — May 191
From?
To?
Sun 5/12
Sun 5/19
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 April or May, 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 May 7, 2024.

Popular in

August

Cheapest in

April

Round-trip from

$223

One-way from

$59
High demand for flights, 18% 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 29% 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 78% by booking at least 60 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 14% on the flight price compared to flying at noon, 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 2,749,864 searches. Data last updated May 7, 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.
Mon 5/2012:59 amONT - ORD
1 stop18h 16mFrontier
Sat 5/257:59 pmORD - ONT
1 stop13h 30mFrontier
Deal found 5/6$132
Wed 5/222:35 pmONT - ORD
1 stop8h 38mFrontier
Sat 5/257:59 pmORD - ONT
1 stop13h 30mFrontier
Deal found 5/7$133
Sat 5/185:41 pmONT - ORD
1 stop9h 19mFrontier
Tue 5/216:45 pmORD - ONT
1 stop13h 29mFrontier
Deal found 5/6$135
Tue 5/1412:59 amONT - ORD
1 stop21h 57mFrontier
Tue 5/216:45 pmORD - ONT
1 stop13h 29mFrontier
Deal found 5/6$138
Tue 5/1412:59 amONT - ORD
1 stop21h 57mFrontier
Mon 5/207:59 pmORD - ONT
1 stop15h 05mFrontier
Deal found 5/6$139
Wed 6/58:55 pmONT - ORD
1 stop6h 28mFrontier
Sat 6/88:35 pmORD - ONT
1 stop12h 28mFrontier
Deal found 5/6$140
Sat 5/255:41 pmONT - ORD
1 stop9h 19mFrontier
Tue 6/47:59 pmORD - ONT
1 stop23h 49mFrontier
Deal found 5/6$141
Sat 5/185:41 pmONT - ORD
1 stop9h 19mFrontier
Mon 5/207:59 pmORD - ONT
1 stop18h 55mFrontier
Deal found 5/6$142
Tue 6/412:59 amONT - ORD
1 stop17h 49mFrontier
Wed 6/128:23 pmORD - ONT
1 stop12h 40mFrontier
Deal found 5/6$143

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 2,749,864 searches. Data last updated May 7, 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.
Tue 6/411:22 amONT - ORD
1 stop10h 44mDelta
Sat 6/81:25 pmORD - ONT
2 stops11h 35mDelta
Deal found 5/6$241
Wed 6/52:13 pmONT - ORD
1 stop7h 53mDelta
Thu 6/61:32 pmORD - ONT
2 stops11h 15mDelta
Deal found 5/6$284
Mon 5/136:42 pmONT - ORD
2 stops11h 57mDelta
Thu 5/161:32 pmORD - ONT
2 stops11h 15mDelta
Deal found 5/6$326
Tue 5/146:00 amONT - ORD
2 stops10h 17mDelta
Sat 5/185:15 pmORD - ONT
1 stop6h 24mDelta
Deal found 5/6$327
Tue 5/146:42 pmONT - ORD
2 stops10h 58mDelta
Sat 5/1811:59 amORD - ONT
2 stops10h 07mDelta
Deal found 5/6$332
Mon 5/136:42 pmONT - ORD
2 stops10h 58mDelta
Thu 5/1611:45 amORD - ONT
2 stops13h 02mDelta
Deal found 5/7$336
Sun 5/126:00 amONT - ORD
2 stops10h 17mDelta
Fri 5/177:30 pmORD - ONT
1 stop6h 13mDelta
Deal found 5/7$337
Wed 5/156:50 amONT - ORD
2 stops12h 42mDelta
Sat 5/1811:59 amORD - ONT
2 stops10h 07mDelta
Deal found 5/7$342
Mon 5/1310:00 pmONT - ORD
1 stop8h 17mDelta
Thu 5/161:32 pmORD - ONT
2 stops11h 15mDelta
Deal found 5/6$398

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 2,749,864 searches. Prices were last updated on May 7, 2024.
Check out some of the best flight deals from Ontario to Chicago in 2024. Check back soon for alternative fares.
Mon 5/2012:59 amONT - ORD
1 stop18h 16mFrontier
Sat 5/257:59 pmORD - ONT
1 stop13h 30mFrontier
Deal found 5/6$132
Mon 5/2012:59 amONT - ORD
1 stop18h 16mFrontier
Sat 5/257:59 pmORD - ONT
1 stop15h 33mFrontier
Deal found 5/7$133
Sat 5/185:41 pmONT - ORD
1 stop9h 19mFrontier
Tue 5/216:45 pmORD - ONT
1 stop13h 29mFrontier
Deal found 5/6$135
Wed 5/222:35 pmONT - ORD
1 stop8h 38mFrontier
Wed 5/296:45 pmORD - ONT
1 stop7h 14mFrontier
Deal found 5/7$137
Tue 5/1412:59 amONT - ORD
1 stop21h 57mFrontier
Tue 5/216:45 pmORD - ONT
1 stop13h 29mFrontier
Deal found 5/6$138
Tue 5/1412:59 amONT - ORD
1 stop21h 57mFrontier
Mon 5/207:59 pmORD - ONT
1 stop15h 05mFrontier
Deal found 5/6$139
Wed 6/58:55 pmONT - ORD
1 stop6h 28mFrontier
Sat 6/88:35 pmORD - ONT
1 stop12h 28mFrontier
Deal found 5/6$140
Mon 5/1311:07 pmONT - ORD
1 stop10h 22mFrontier
Tue 5/216:45 pmORD - ONT
1 stop13h 29mFrontier
Deal found 5/6$141
Sat 5/185:41 pmONT - ORD
1 stop9h 19mFrontier
Mon 5/207:59 pmORD - ONT
1 stop18h 55mFrontier
Deal found 5/6$142

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 2,749,864 searches. Data last updated May 7, 2024.
Check out some of the best flight deals from Ontario to Chicago in 2024. Check back soon for alternative fares.
Mon 5/2012:59 amONT - ORD
1 stop18h 16mFrontier
Sat 5/257:59 pmORD - ONT
1 stop13h 30mFrontier
Deal found 5/6$132
Mon 5/2012:59 amONT - ORD
1 stop18h 16mFrontier
Sat 5/257:59 pmORD - ONT
1 stop15h 33mFrontier
Deal found 5/7$133
Sat 5/185:41 pmONT - ORD
1 stop9h 19mFrontier
Tue 5/216:45 pmORD - ONT
1 stop13h 29mFrontier
Deal found 5/6$135
Wed 5/222:35 pmONT - ORD
1 stop8h 38mFrontier
Wed 5/296:45 pmORD - ONT
1 stop7h 14mFrontier
Deal found 5/7$137
Tue 5/1412:59 amONT - ORD
1 stop21h 57mFrontier
Tue 5/216:45 pmORD - ONT
1 stop13h 29mFrontier
Deal found 5/6$138
Tue 5/1412:59 amONT - ORD
1 stop21h 57mFrontier
Mon 5/207:59 pmORD - ONT
1 stop15h 05mFrontier
Deal found 5/6$139
Wed 6/58:55 pmONT - ORD
1 stop6h 28mFrontier
Sat 6/88:35 pmORD - ONT
1 stop12h 28mFrontier
Deal found 5/6$140
Mon 5/1311:07 pmONT - ORD
1 stop10h 22mFrontier
Tue 5/216:45 pmORD - ONT
1 stop13h 29mFrontier
Deal found 5/6$141
Sat 5/185:41 pmONT - ORD
1 stop9h 19mFrontier
Mon 5/207:59 pmORD - ONT
1 stop18h 55mFrontier
Deal found 5/6$142

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 2,749,864 searches. Data last updated May 7, 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.
Tue 5/1412:59 amONT - ORD
1 stop21h 57mFrontier
Tue 5/216:45 pmORD - ONT
1 stop13h 29mFrontier
Deal found 5/6$138
Tue 5/1412:59 amONT - ORD
1 stop21h 57mFrontier
Mon 5/207:59 pmORD - ONT
1 stop15h 05mFrontier
Deal found 5/6$139
Mon 5/1311:07 pmONT - ORD
1 stop10h 22mFrontier
Tue 5/216:45 pmORD - ONT
1 stop13h 29mFrontier
Deal found 5/6$141
Mon 5/1312:59 amONT - ORD
1 stop21h 57mFrontier
Tue 5/216:45 pmORD - ONT
1 stop13h 29mFrontier
Deal found 5/6$143
Mon 5/1312:59 amONT - ORD
1 stop21h 57mFrontier
Sat 5/187:59 pmORD - ONT
1 stop13h 30mFrontier
Deal found 5/7$144
Tue 5/142:01 pmONT - ORD
1 stop8h 51mFrontier
Mon 5/207:59 pmORD - ONT
1 stop15h 05mFrontier
Deal found 5/7$147
Thu 5/1612:59 amONT - ORD
1 stop22h 09mFrontier
Tue 5/217:59 pmORD - ONT
1 stop18h 56mFrontier
Deal found 5/7$152
Fri 5/1711:04 pmONT - ORD
1 stop27h 56mFrontier
Tue 5/217:59 pmORD - ONT
1 stop15h 05mFrontier
Deal found 5/6$153
Mon 5/1311:07 pmONT - ORD
1 stop10h 22mFrontier
Mon 5/207:59 pmORD - ONT
1 stop15h 05mFrontier
Deal found 5/6$156

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 2,749,864 searches. Data last updated May 7, 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.
Wed 5/222:35 pmONT - ORD
1 stop8h 38mFrontier
Deal found 5/7$59
Wed 5/222:35 pmONT - ORD
1 stop8h 38mFrontier
Deal found 5/5$60
Wed 5/222:35 pmONT - ORD
1 stop8h 38mFrontier
Deal found 5/6$61
Sat 6/18:29 amONT - ORD
1 stop13h 49mFrontier
Deal found 5/7$64
Tue 5/217:04 amONT - ORD
1 stop29h 53mFrontier
Deal found 5/6$66
Wed 5/297:45 pmONT - ORD
1 stop7h 15mFrontier
Deal found 5/7$67
Wed 5/297:45 pmONT - ORD
1 stop7h 15mFrontier
Deal found 5/6$68
Tue 5/2810:42 pmONT - ORD
1 stop28h 18mFrontier
Deal found 5/7$69
Wed 6/58:55 pmONT - ORD
1 stop6h 28mFrontier
Deal found 5/6$70

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 2,749,864 searches. Data last updated May 7, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$132 - $288

Route

Depart

Return

Price

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

Mon 5/20

1 stop18h 16m

Chicago O'Hare Intl

Sat 5/25

1 stop13h 30m

$132

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

Wed 5/22

1 stop8h 38m

Chicago O'Hare Intl

Sat 5/25

1 stop13h 30m

$133

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

Sat 5/18

1 stop9h 19m

Chicago O'Hare Intl

Tue 5/21

1 stop13h 29m

$135

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

Wed 8/21

1 stop14h 17m

Chicago O'Hare Intl

Wed 8/28

1 stop6h 51m

$138

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

Wed 6/5

1 stop6h 28m

Chicago O'Hare Intl

Sat 6/8

1 stop12h 28m

$140

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

Sat 5/25

1 stop9h 19m

Chicago O'Hare Intl

Tue 6/4

1 stop23h 49m

$141

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

Tue 6/4

1 stop10h 44m

Chicago O'Hare Intl

Sat 6/8

2 stops11h 35m

$241

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

Tue 6/4

1 stop6h 31m

Chicago O'Hare Intl

Thu 6/6

2 stops11h 04m

$277

OntarioChicago O'Hare Intl

ONT - ORD

ONTORD

Ontario

Wed 6/5

1 stop10h 29m

Chicago O'Hare Intl

Wed 6/12

2 stops17h 58m

$288

Flights are sorted by cheapest first

Deals found on 5/6

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 3, 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 5, 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 $65 while a round-trip flight costs $181. Price data was last updated on May 5, 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 $348). 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

$348

July

$330

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 May 7, 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
6,075 reviews
Check prices

Entertainment

7.8

Crew

8.7

Boarding

8.3

Comfort

8.1

Overall

8.2

Food

7.3

Reviews

1 / 10

I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.

Southwest
8.2
Very good
6,075 reviews
Southwest
8.2
Very good
6,075 reviews
Check prices

Entertainment

7.8

Crew

8.7

Boarding

8.3

Comfort

8.1

Overall

8.2

Food

7.3

Reviews

1 / 10

I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.

Alaska Airlines
8.1
Very good
9,147 reviews
Southwest
8.2
Very good
6,075 reviews
Check prices

Entertainment

7.8

Crew

8.7

Boarding

8.3

Comfort

8.1

Overall

8.2

Food

7.3

Reviews

1 / 10

I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.

Delta
8.1
Very good
10,810 reviews
Southwest
8.2
Very good
6,075 reviews
Check prices

Entertainment

7.8

Crew

8.7

Boarding

8.3

Comfort

8.1

Overall

8.2

Food

7.3

Reviews

1 / 10

I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.

United Airlines
7.4
Good
11,073 reviews
Southwest
8.2
Very good
6,075 reviews
Check prices

Entertainment

7.8

Crew

8.7

Boarding

8.3

Comfort

8.1

Overall

8.2

Food

7.3

Reviews

1 / 10

I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.

American Airlines
7.3
Good
14,686 reviews
Southwest
8.2
Very good
6,075 reviews
Check prices

Entertainment

7.8

Crew

8.7

Boarding

8.3

Comfort

8.1

Overall

8.2

Food

7.3

Reviews

1 / 10

I was very relaxed and calm so I took a brief nap. The flight was pretty smooth.

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 $132, but on average you can expect to pay $144.

  • 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 $132 on this airline. Frontier is currently priced 66% 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 5/7.

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
San Diego to O'Hare Intl flights
Oakland to O'Hare Intl flights
Burbank to O'Hare Intl flights
Ontario to Midway flights
San Jose to O'Hare Intl flights
San Diego to Midway flights
San Francisco to Midway flights
Santa Ana to Midway flights
Sacramento to O'Hare Intl flights
San Jose to Midway flights
Sacramento to Midway flights
Long Beach to O'Hare Intl 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
Palm Springs to Midway flights
Fresno to Midway flights
Monterey to O'Hare Intl flights
Santa Barbara to O'Hare Intl flights
Los Angeles to Rockford flights
Long Beach to Midway flights
San Luis Obispo to O'Hare Intl flights
Reno to Midway flights
San Jose to Rockford flights
Oakland to Rockford flights
Burbank to Rockford flights
Santa Rosa to O'Hare Intl flights
San Diego to Rockford flights
Sacramento to Rockford flights
Arcata to O'Hare Intl flights
Tijuana to O'Hare Intl flights
Redding to O'Hare Intl flights
Bakersfield to O'Hare Intl flights
San Francisco to Rockford flights
Tijuana to Midway flights
Yuma to O'Hare Intl flights
Bakersfield to Midway flights
Ontario to Rockford flights
El Centro to O'Hare Intl 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 2,749,864 searches. Data last updated May 7, 2024.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$105Average$200FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
FrontierCheapest$148Average$214FlexibilityNo 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$434FlexibilityNo 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

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 Ordu/Giresun
Flights to Hakodate
Flights to Gazipasa
Flights to Kirkwall Arpt
Flights to Skiathos
Flights to Bourgas
Flights to Kalamata
Flights to Menorca/Mahon
Flights to Mytilene
Flights to Mason City
Flights to Pau Pyrénées
Flights to Neiva La Marguita
Flights to Cortez Montezuma County
Flights to Biarritz Parme
Flights to Parikia Paros
Flights to Ohrid
Flights to Edremit/Korfez
Flights to Naxos
Flights to Dalaman
Flights to Lublin
Flights to Miyakojima Hirara
Flights to Champaign University-Willard
Flights to Kagoshima
Flights to Constanţa Mihail Kogalniceanu

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