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O'Hare Intl

$177+ 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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — ORD
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
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 70 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 August 14, 2025.

Round-trip from

$324
(United Airlines)

One-way from

$177
(Kiwi.com)

Popular in

March

Cheapest in

June

Average price

$449

Good round-trip deal

$460 or less

Good one-way deal

$217 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. 11% potential increase in price ($66 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 14, 2025.

This United Airlines deal was found by Cheapflights users on 8/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/195:25 pmYOW - ORD
Nonstop2h 29mUnited Airlines
Mon 9/226:06 pmORD - YOW
Nonstop2h 29mUnited Airlines
Deal found 8/12$324
This Kiwi.com deal was found by Cheapflights users on 8/12. 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.
Fri 9/264:25 pmYOW - ORD
1 stop23h 52mMultiple Airlines
Mon 9/298:49 pmORD - YOW
1 stop19h 08mMultiple Airlines
Deal found 8/12$327
This United deal was found by Cheapflights users on 8/13. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/186:33 amYOW - ORD
Nonstop2h 27mMultiple Airlines
Sun 10/198:40 amORD - YOW
1 stop4h 11mMultiple Airlines
Deal found 8/13$328
This Trip.com deal was found by Cheapflights users on 8/13. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/275:25 pmYOW - ORD
Nonstop2h 29mUnited Airlines
Sat 10/42:35 pmORD - YOW
1 stop6h 30mUnited Airlines
Deal found 8/13$336
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 9/67:00 amYOW - ORD
2 stops10h 50mMultiple Airlines
Sun 9/76:30 amORD - YOW
1 stop9h 27mMultiple Airlines
Deal found 8/12$337
This FlightHub deal was found by Cheapflights users on 8/12. 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.
Fri 9/195:15 pmYOW - ORD
1 stop20h 24mWestJet
Mon 9/225:30 pmORD - YOW
2 stops21h 49mWestJet
Deal found 8/12$338

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 August 14, 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

Fri 9/19

5:25 pm-6:54 pm

Nonstop2h 29m

Chicago O'Hare Intl

Mon 9/22

6:06 pm-9:35 pm

Nonstop2h 29m

$324

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 9/26

4:25 pm-3:17 pm

1 stop23h 52m

Chicago O'Hare Intl

Mon 9/29

8:49 pm-4:57 pm

1 stop19h 08m

$327

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sat 10/18

6:33 am-8:00 am

Nonstop2h 27m

Chicago O'Hare Intl

Sun 10/19

8:40 am-1:51 pm

1 stop4h 11m

$328

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sat 10/18

6:00 am-9:51 am

1 stop4h 51m

Chicago O'Hare Intl

Sun 10/19

8:40 am-1:51 pm

1 stop4h 11m

$333

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sat 9/27

5:25 pm-6:54 pm

Nonstop2h 29m

Chicago O'Hare Intl

Sat 10/4

2:35 pm-10:05 pm

1 stop6h 30m

$336

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sat 9/6

7:00 am-4:50 pm

2 stops10h 50m

Chicago O'Hare Intl

Sun 9/7

6:30 am-4:57 pm

1 stop9h 27m

$337

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 9/19

5:15 pm-12:39 pm

1 stop20h 24m

Chicago O'Hare Intl

Mon 9/22

5:30 pm-4:19 pm

2 stops21h 49m

$338

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 9/19

5:55 am-10:17 am

2 stops29h 22m

Chicago O'Hare Intl

Mon 9/22

5:05 am-5:20 pm

1 stop11h 15m

$338

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 9/5

3:25 pm-4:50 pm

2 stops26h 25m

$177

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 9/26

6:00 am-9:51 am

1 stop4h 51m

$183

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/12

Showing 1-10 of 18 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 August 8, 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 August 14, 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.

Weekly flight availability from Ottawa to Chicago O'Hare Intl Airport

Explore weekly flight availability from Ottawa to O'Hare Intl. 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 August 14, 2025.

The most flights from YOW to ORD are scheduled on a Monday (12 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (12 on average).

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 August 14, 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
8,916 reviews

Overall

7.4

Food

6.6

Entertainment

7.1

Boarding

7.7

Crew

8.1

Comfort

7.3

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
8,916 reviews
United Airlines
7.4
Good
8,916 reviews

Overall

7.4

Food

6.6

Entertainment

7.1

Boarding

7.7

Crew

8.1

Comfort

7.3

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
9,949 reviews
United Airlines
7.4
Good
8,916 reviews

Overall

7.4

Food

6.6

Entertainment

7.1

Boarding

7.7

Crew

8.1

Comfort

7.3

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.

  • 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 36% 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 (86%) and GoJet (82%).

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

    On average you can expect to pay $502 for a flight from Ottawa to Chicago O'Hare Intl Airport. The cheapest flight overall is $172 while the most popular route, (Ottawa - Chicago O'Hare Intl) is currently priced at $311.

  • 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
Beloit
Hoffman Estates
Skokie
Des Plaines
Elgin
Gurnee
Arlington Heights
Racine
Rockford
Great Lakes
Orland Park
Merrillville
Naperville
Waukegan
Elk Grove Village
Downers Grove
Tinley Park
Evanston

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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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$324Average$519FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$326Average$550FlexibilityNo cancel feeOn-time67%

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