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Cheap flights from Chicago O'Hare Intl Airport to Ontario from C$ 112

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 13/5. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — YYZ
12 Apr — 19 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from O'Hare Intl to Ontario

Enter your travel dates to find the best prices.

Cheapest flights from O'Hare Intl to Ontario
Explore the most affordable flight options available from O'Hare Intl to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 March 2026.

Thu 16/412:50 p.m.
ORD
-
YUL
Nonstop2h 15m
Air Canada
Sun 19/49:15 a.m.
YUL
-
ORD
1 stop4h 50m
Air Canada
Deal found 10/3C$ 276
Sat 25/43:45 p.m.
ORD
-
YUL
Nonstop2h 11m
Air Canada
Mon 27/412:00 p.m.
YUL
-
ORD
1 stop6h 50m
Air Canada
Deal found 13/3C$ 287
Thu 9/47:55 a.m.
ORD
-
YUL
1 stop4h 26m
Air Canada
Sun 12/47:00 a.m.
YUL
-
ORD
1 stop7h 05m
Air Canada
Deal found 9/3C$ 291
Fri 17/47:55 a.m.
ORD
-
YUL
1 stop4h 26m
Air Canada
Mon 20/411:10 a.m.
YUL
-
ORD
1 stop5h 05m
Air Canada
Deal found 9/3C$ 296
Thu 9/49:50 a.m.
ORD
-
YYZ
Nonstop1h 36m
Air Canada
Sun 12/48:15 a.m.
YYZ
-
ORD
Nonstop1h 55m
Air Canada
Deal found 9/3C$ 297
Sat 25/48:40 a.m.
ORD
-
YUL
Nonstop2h 11m
Air Canada
Sat 25/43:15 p.m.
YUL
-
ORD
1 stop5h 10m
Air Canada
Deal found 12/3C$ 300
Thu 23/412:50 p.m.
ORD
-
YUL
Nonstop2h 15m
Air Canada
Mon 27/43:15 p.m.
YUL
-
ORD
1 stop5h 10m
Air Canada
Deal found 10/3C$ 301
Fri 24/42:00 p.m.
ORD
-
YYZ
Nonstop1h 43m
Air Canada
Fri 1/54:00 p.m.
YYZ
-
ORD
Nonstop1h 59m
Air Canada
Deal found 10/3C$ 302
Sat 11/46:40 p.m.
ORD
-
YYZ
Nonstop1h 43m
Air Canada
Sun 12/46:15 a.m.
YYZ
-
ORD
1 stop5h 38m
Air Canada
Deal found 10/3C$ 313
Thu 24/93:20 p.m.
ORD
-
YTZ
Nonstop1h 40m
Porter Airlines
Sat 26/910:05 a.m.
YTZ
-
ORD
Nonstop1h 55m
Porter Airlines
Deal found 12/3C$ 316
Mon 21/97:00 a.m.
ORD
-
YTZ
Nonstop1h 40m
Porter Airlines
Mon 28/910:05 a.m.
YTZ
-
ORD
Nonstop1h 55m
Porter Airlines
Deal found 11/3C$ 317
Fri 4/911:45 a.m.
ORD
-
YTZ
Nonstop1h 40m
Porter Airlines
Sat 5/910:05 a.m.
YTZ
-
ORD
Nonstop1h 55m
Porter Airlines
Deal found 12/3C$ 323

Find flight deals from O'Hare Intl to Ontario

Keep the following information in mind while searching for O'Hare Intl to Ontario flight deals. Data was last updated 13 March 2026.

Round-trip from

C$ 274

One-way from

C$ 112

Popular in

December

Cheapest in

September

Average price

C$ 345

Good round-trip deal

C$ 370 or less

Good one-way deal

C$ 143 or less
Air Canada
  • Air Canada
  • 16/4-20/4
  • Nonstop
  • 4h 50m total
  • Chicago to Ontario
Search Deals
Air Canada
  • Air Canada
  • 13/5
  • Nonstop
  • 2h 15m total
  • Chicago to Ontario
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 35 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals
Price to beat on a round-trip flight from Chicago O'Hare Intl to Ontario.
Search Deals
Price to beat on a one-way flight from Chicago O'Hare Intl to Ontario.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from O'Hare Intl 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, Cheapflights users made 629,999 searches. Data last updated 13 March 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

Cheapest round-trip

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Sat 23/5

6:30 a.m.-7:45 p.m.

1 stop12h 15m

Montreal Pierre Elliott Trudeau Intl

Sun 24/5

6:10 a.m.-7:50 a.m.

Nonstop2h 40m

C$ 337

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Tue 28/4

6:00 a.m.-1:09 p.m.

1 stop6h 09m

Montreal Pierre Elliott Trudeau Intl

Wed 29/4

6:10 a.m.-8:00 a.m.

Nonstop2h 50m

C$ 337

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Wed 8/4

2:00 p.m.-5:30 p.m.

Nonstop2h 30m

Montreal Pierre Elliott Trudeau Intl

Mon 13/4

11:23 a.m.-4:04 p.m.

1 stop5h 41m

C$ 345
Quickest round-trip

ChicagoToronto

ORD - YTZ

ORDYTZ

Chicago O'Hare Intl

Wed 10/6

7:25 a.m.-10:06 a.m.

Nonstop1h 41m

Toronto Island

Sun 14/6

7:20 p.m.-8:16 p.m.

Nonstop1h 56m

C$ 354

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Tue 7/4

5:40 p.m.-11:13 p.m.

1 stop4h 33m

Montreal Pierre Elliott Trudeau Intl

Wed 15/4

6:00 a.m.-12:45 p.m.

1 stop7h 45m

C$ 357

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Sat 16/5

3:00 p.m.-11:57 p.m.

1 stop7h 57m

Montreal Pierre Elliott Trudeau Intl

Thu 21/5

6:00 a.m.-1:01 p.m.

1 stop8h 01m

C$ 357

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Thu 4/6

2:59 p.m.-11:57 p.m.

1 stop7h 58m

Montreal Pierre Elliott Trudeau Intl

Sat 13/6

7:00 a.m.-4:44 p.m.

1 stop10h 44m

C$ 357

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Wed 1/4

2:30 p.m.-10:06 p.m.

1 stop6h 36m

Montreal Pierre Elliott Trudeau Intl

Tue 7/4

11:23 a.m.-4:56 p.m.

1 stop6h 33m

C$ 357

ChicagoMontreal

ORD - YUL

ORDYUL

Chicago O'Hare Intl

Fri 29/5

3:53 p.m.-12:13 a.m.

1 stop7h 20m

Montreal Pierre Elliott Trudeau Intl

Mon 1/6

6:35 p.m.-11:26 p.m.

1 stop5h 51m

C$ 357

ChicagoToronto

ORD - YYZ

ORDYYZ

Chicago O'Hare Intl

Thu 7/5

9:04 a.m.-11:49 a.m.

Nonstop1h 45m

Toronto Pearson Intl

Tue 12/5

8:50 a.m.-9:50 a.m.

Nonstop2h 00m

C$ 367

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/3

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from O'Hare Intl to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from O'Hare Intl with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Chicago O'Hare Intl Airport to Ontario

What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to Region of Ontario?

Currently, October is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Region of Ontario (average of C$ 116). Flying from Chicago O'Hare Intl Airport to Region of Ontario in March is currently the most expensive (average of C$ 298). 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.

What is the cheapest time of day to fly from ORD to ON?

Find hourly flight availability from O'Hare Intl to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 13 March 2026.

It’s typically best to fly out from Chicago O'Hare Intl Airport to Region of Ontario in the evening. Doing so could potentially save you 58% on the flight price compared to flying in the afternoon, which is usually more expensive.

What is the cheapest day to fly from Chicago O'Hare Intl Airport to Region of Ontario?

Use this chart to determine the cheapest time to fly round-trip from O'Hare Intl to Ontario. Price data was last updated on 12 March 2026.

Travelers seeking maximum savings on their Chicago O'Hare Intl Airport to Region of Ontario flight should consider departing on Wednesday evenings when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Chicago O'Hare Intl Airport to Region of Ontario

Explore weekly flight availability from O'Hare Intl to Ontario. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 13 March 2026.

The most flights from ORD to CAON are scheduled on a Monday (65 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (49 on average).

How much does it cost to fly round-trip from Chicago O'Hare Intl Airport to Region of Ontario?

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated 13 March 2026.
See what other customers who have flown with United Airlines and Air Canada from Chicago O'Hare Intl Airport to Ontario have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,423 reviews
Check prices

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,423 reviews
United Airlines
7.4
Good
9,423 reviews
Check prices

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
Air Canada
7.1
Good
10,800 reviews
United Airlines
7.4
Good
9,423 reviews
Check prices

Entertainment

7.1

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

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

  • How long is the flight from Chicago O'Hare Intl Airport to Region of Ontario?

    Departing from Chicago O'Hare Intl Airport to Region of Ontario will take you 1h 41m. Airlines will cover a distance of 716 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines to fly from Chicago O'Hare Intl Airport to Region of Ontario one-way?

    C$ 94 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on American Airlines and Porter Airlines, with prices starting from C$ 111 and C$ 118, respectively.

  • What are the most popular routes from Chicago O'Hare Intl Airport to Region of Ontario?

    When deciding which route to take from Chicago O'Hare Intl Airport to Region of Ontario consider Chicago O'Hare Intl - Toronto Pearson Intl, Chicago O'Hare Intl - Montreal Pierre Elliott Trudeau Intl or Chicago O'Hare Intl - Toronto Island as they are the most popular.

  • What are the most reliable airlines from Chicago O'Hare Intl Airport to Region of Ontario?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Chicago O'Hare Intl Airport to Region of Ontario on time: Korean Air (94%), Alaska Airlines (74%), Royal Jordanian (72%).

  • What are the cheapest flights from Chicago O'Hare Intl Airport to Region of Ontario?

    While on average a flight from Chicago O'Hare Intl Airport to Region of Ontario is generally C$ 357, our data shows the cheapest flight currently is C$ 124. When looking at the most popular route, (Chicago O'Hare Intl - Toronto Pearson Intl), you can expect to pay C$ 357 for that flight.

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

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

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

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

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

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

  • What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to Region of Ontario?

    Currently, October is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Region of Ontario (average of C$ 116). Flying from Chicago O'Hare Intl Airport to Region of Ontario in March is currently the most expensive (average of C$ 298). 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.

See more FAQs

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Top 2 airlines flying from O'Hare Intl to Ontario

Discover the top 2 airlines that operate flights from O'Hare Intl to Ontario. 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 629,999 searches. Data last updated 13 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 166AverageC$ 352FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 208AverageC$ 338FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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

Deals for O'Hare Intl to Ontario flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Millions of users choose and trust Cheapflights to book the best flight deals from O'Hare Intl to Ontario for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Yes! Cheapflights helps users easily find flights from O'Hare Intl to Ontario with no change fees.

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

Yes! Start tracking prices for O'Hare Intl to Ontario flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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