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O'Hare Intl

$174+ Cheap flights from Ottawa (YOW) to O'Hare Intl (ORD)

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 10/2. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — ORD
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheapflights Tip: The best prices from Ottawa to Chicago O'Hare Intl are usually found in June or July, booked 74 days in advance, depart on a Saturday or Friday and return on a Thursday

Cheap flight deals from Ottawa to O'Hare Intl

Discover tips and strategies to find the most affordable flight options for your journey from Ottawa (YOW) 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 September 17, 2025.

Round-trip from

$299
(Kiwi.com)

One-way from

$174
(Kiwi.com)

Popular in

March

Cheapest in

June

Average price

$578

Good round-trip deal

$523 or less

Good one-way deal

$340 or less
From Ottawa to Chicago O'Hare Intl
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One-way flight from Ottawa to Chicago O'Hare Intl
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Highest demand for flights based on searches. 10% potential increase in price ($58 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Ottawa to Chicago O'Hare Intl.
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Price to beat on a one-way flight from Ottawa to Chicago O'Hare Intl.
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Find flight deals from Ottawa to O'Hare Intl

Cheapest flights from Ottawa to O'Hare Intl
Explore the most affordable flight options available from Ottawa to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/126:00 amYOW - ORD
1 stop11h 43mWestJet
Sun 10/195:30 pmORD - YOW
1 stop12h 15mWestJet
Deal found 9/16$299
This Kiwi.com deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/16:55 pmYOW - ORD
1 stop20h 40mMultiple Airlines
Tue 11/47:43 pmORD - YOW
1 stop20h 42mMultiple Airlines
Deal found 9/16$313
This Kiwi.com deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/53:50 pmYOW - ORD
1 stop20h 00mMultiple Airlines
Thu 10/912:53 pmORD - YOW
2 stops10h 29mMultiple Airlines
Deal found 9/16$314
This Mytrip deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/143:50 pmYOW - ORD
1 stop8h 55mMultiple Airlines
Tue 10/215:05 amORD - YOW
1 stop11h 15mMultiple Airlines
Deal found 9/16$321
This Kiwi.com deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/153:50 pmYOW - ORD
1 stop8h 55mMultiple Airlines
Wed 10/225:05 amORD - YOW
1 stop11h 15mMultiple Airlines
Deal found 9/17$335
This Kiwi.com deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/164:25 pmYOW - ORD
1 stop16h 09mMultiple Airlines
Fri 10/245:05 amORD - YOW
1 stop11h 15mMultiple Airlines
Deal found 9/16$337
This FlightHub deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/166:00 amYOW - ORD
1 stop11h 43mWestJet
Fri 10/245:30 pmORD - YOW
1 stop23h 50mWestJet
Deal found 9/17$343
This Mytrip deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1810:00 amYOW - ORD
1 stop4h 14mAir Canada
Sun 10/198:25 pmORD - YOW
1 stop4h 09mAir Canada
Deal found 9/16$344
This Mytrip deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/33:50 pmYOW - ORD
2 stops26h 00mMultiple Airlines
Mon 10/65:05 amORD - YOW
1 stop11h 15mMultiple Airlines
Deal found 9/15$345
This Kissandfly.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/165:25 pmYOW - ORD
Nonstop2h 29mLufthansa
Sun 10/196:06 pmORD - YOW
Nonstop2h 29mLufthansa
Deal found 9/15$346

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ottawa 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 2,558,603 searches. Data last updated September 17, 2025.
Use the filters below to find and compare flights from Ottawa to Chicago O'Hare Intl Airport that are best for you.

Fly from

Ottawa

Fly to

O'Hare Intl

Route

Depart

Return

Price

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sun 10/12

6:00 am-4:43 pm

1 stop11h 43m

Chicago O'Hare Intl

Sun 10/19

5:30 pm-6:45 am

1 stop12h 15m

$299

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sat 11/1

6:55 pm-2:35 pm

1 stop20h 40m

Chicago O'Hare Intl

Tue 11/4

7:43 pm-5:25 pm

1 stop20h 42m

$313

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sun 10/5

3:50 pm-10:50 am

1 stop20h 00m

Chicago O'Hare Intl

Thu 10/9

12:53 pm-12:22 am

2 stops10h 29m

$314

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Wed 10/15

3:50 pm-11:45 pm

1 stop8h 55m

Chicago O'Hare Intl

Wed 10/22

5:05 am-5:20 pm

1 stop11h 15m

$335

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 10/16

6:00 am-4:43 pm

1 stop11h 43m

Chicago O'Hare Intl

Fri 10/24

5:30 pm-6:20 pm

1 stop23h 50m

$343

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 10/16

5:25 pm-6:54 pm

Nonstop2h 29m

Chicago O'Hare Intl

Sun 10/19

6:06 pm-9:35 pm

Nonstop2h 29m

$346

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 10/3

5:25 pm-6:54 pm

Nonstop2h 29m

Chicago O'Hare Intl

Tue 10/7

6:00 am-11:45 am

1 stop4h 45m

$349

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Wed 10/15

5:25 pm-6:54 pm

Nonstop2h 29m

Chicago O'Hare Intl

Wed 10/22

8:50 am-2:13 pm

1 stop4h 23m

$351

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 11/7

3:55 pm-7:13 am

1 stop16h 18m

Chicago O'Hare Intl

Mon 11/10

6:20 am-12:42 am

2 stops17h 22m

$351

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Mon 11/10

4:15 pm-9:23 am

1 stop18h 08m

Chicago O'Hare Intl

Sun 11/16

6:10 pm-12:42 am

2 stops29h 32m

$352

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 17 results
1
2

Best time to book a flight from Ottawa to O'Hare Intl

Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl from Ottawa 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 Ottawa to Chicago O'Hare Intl Airport

How far ahead should I book a flight from Ottawa to Chicago O'Hare Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from Ottawa to O'Hare Intl. Price data was last updated on September 12, 2025.

Booking 70 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ottawa to Chicago O'Hare Intl Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, August is the cheapest month in which you can book a flight from Ottawa to Chicago O'Hare Intl Airport (average of $245). Flying from Ottawa to Chicago O'Hare Intl Airport in March is currently the most expensive (average of $321). 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 YOW to ORD?

Find hourly flight availability from Ottawa 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 September 17, 2025.

When flying from Ottawa to Chicago O'Hare Intl Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 13% versus a flight in the morning.

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

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 September 17, 2025.
Read reviews from past customers who have flown United Airlines and Air Canada from Ottawa to Chicago O'Hare Intl Airport. 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
8,926 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Crew

8.1

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,926 reviews
United Airlines
7.4
Good
8,926 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Crew

8.1

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
Air Canada
7.1
Good
10,000 reviews
United Airlines
7.4
Good
8,926 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Crew

8.1

Boarding

7.7

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

Find useful and relevant information for your journey from Ottawa 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 Ottawa to Chicago O'Hare Intl?

    Ottawa (YOW), located 6.6 mi from the city center, is the airport you fly out of when you book flights from Ottawa to Chicago O'Hare Intl. 2 airlines have flights from Ottawa to Chicago O'Hare Intl on a regular basis. Booking flights from Ottawa to Chicago O'Hare Intl should not be difficult; the airport handles an average of 12 outbound flights to Chicago O'Hare Intl per day.

  • How long is the flight from Ottawa to Chicago O'Hare Intl Airport?

    Airlines like WestJet fly from Ottawa to Chicago O'Hare Intl Airport in about 11h 43m. The time it takes to get you to your destination can typically vary by up to . There are 653 mi between Ottawa and Chicago O'Hare Intl Airport.

  • What are the cheapest airlines flying from Ottawa to Chicago O'Hare Intl Airport round-trip?

    According to our current data, United Airlines ($324), and Air Canada ($326) offers the cheapest pricing from Ottawa to Chicago O'Hare Intl Airport. These flights start at 37% lower than the current average price 3 months from now.

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

    The top 3 most reliable airlines when flying from Ottawa to Chicago O'Hare Intl Airport are Avianca (90%), ANA (88%) and GoJet (85%).

  • What are the cheapest flights from Ottawa to Chicago O'Hare Intl Airport?

    On average you can expect to pay $845 for a flight from Ottawa to Chicago O'Hare Intl Airport. The cheapest flight overall is $201 while the most popular route, (Ottawa - Chicago O'Hare Intl) is currently priced at $299.

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

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

  • How can I find direct flights from Ottawa 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 Ottawa to O'Hare Intl.

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

    Yes. Cheapflights offers flight deals from Ottawa 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.

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

    Currently, August is the cheapest month in which you can book a flight from Ottawa to Chicago O'Hare Intl Airport (average of $245). Flying from Ottawa to Chicago O'Hare Intl Airport in March is currently the most expensive (average of $321). 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

Traveling to a place near Chicago O'Hare Intl Airport?

Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locations
Schaumburg
Rosemont
Skokie
Gurnee
Hoffman Estates
Des Plaines
Elgin
Arlington Heights
Orland Park
Beloit
Racine
Rockford
Oak Brook
Elk Grove Village
Downers Grove
Naperville
Evanston
Merrillville
Bridgeview
Warrenville

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Top 2 airlines flying from Ottawa to O'Hare Intl

Discover the top 2 airlines that operate flights from Ottawa 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 2,558,603 searches. Data last updated September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$324Average$519FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$326Average$550FlexibilityNo cancel feeOn-time67%

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