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O'Hare Intl

$210+ 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 7/28. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — ORD
Jul 5 — Jul 121
Sat 7/5
Sat 7/12
1 adult, Economy
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Cheapflights Tip: The best prices from Ottawa to Chicago O'Hare Intl are usually found in May or June, booked 23 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 June 30, 2025.

Round-trip from

$318
(United Airlines)

One-way from

$210
(Kiwi.com)

Popular in

March

Cheapest in

May

Average price

$466

Good round-trip deal

$381 or less

Good one-way deal

$220 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. 8% potential increase in price ($50 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 30, 2025.

This United Airlines deal was found by Cheapflights users on 6/28. 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.
Thu 9/2510:37 amYOW - ORD
Nonstop2h 24mUnited Airlines
Wed 10/810:50 amORD - YOW
Nonstop2h 14mUnited Airlines
Deal found 6/28$318
This Air Canada deal was found by Cheapflights users on 6/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/189:05 amYOW - ORD
1 stop6h 50mAir Canada
Sun 9/286:20 pmORD - YOW
1 stop4h 59mAir Canada
Deal found 6/28$344
This Kiwi.com deal was found by Cheapflights users on 6/27. 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 7/113:50 pmYOW - ORD
1 stop9h 03mMultiple Airlines
Sun 7/135:05 amORD - YOW
1 stop11h 10mMultiple Airlines
Deal found 6/27$380
This FlightHub deal was found by Cheapflights users on 6/28. 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.
Mon 9/86:00 amYOW - ORD
1 stop11h 43mWestJet
Wed 9/105:30 pmORD - YOW
2 stops21h 49mWestJet
Deal found 6/28$399

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 June 30, 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

Thu 9/25

10:37 am-12:01 pm

Nonstop2h 24m

Chicago O'Hare Intl

Wed 10/8

10:50 am-2:04 pm

Nonstop2h 14m

$318

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 9/18

9:05 am-2:55 pm

1 stop6h 50m

Chicago O'Hare Intl

Sun 9/28

6:20 pm-12:19 am

1 stop4h 59m

$344

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 7/11

3:50 pm-11:53 pm

1 stop9h 03m

Chicago O'Hare Intl

Sun 7/13

5:05 am-5:15 pm

1 stop11h 10m

$380

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Mon 9/8

6:00 am-4:43 pm

1 stop11h 43m

Chicago O'Hare Intl

Wed 9/10

5:30 pm-4:19 pm

2 stops21h 49m

$399

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Mon 7/28

4:25 pm-10:14 am

1 stop18h 49m

$210

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Wed 8/13

11:05 am-2:55 pm

1 stop4h 50m

$218

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Mon 7/28

6:33 am-7:55 am

Nonstop2h 22m

$221

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/28

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 June 27, 2025.

Booking 23 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 June 30, 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 June 30, 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 June 30, 2025.
Read reviews from past customers who have flown United Airlines, WestJet, 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
8,852 reviews

Boarding

7.7

Entertainment

7.0

Overall

7.4

Comfort

7.3

Food

6.6

Crew

8.1

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
8,852 reviews
United Airlines
7.4
Good
8,852 reviews

Boarding

7.7

Entertainment

7.0

Overall

7.4

Comfort

7.3

Food

6.6

Crew

8.1

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!
WestJet
7.2
Good
2,908 reviews
United Airlines
7.4
Good
8,852 reviews

Boarding

7.7

Entertainment

7.0

Overall

7.4

Comfort

7.3

Food

6.6

Crew

8.1

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
9,657 reviews
United Airlines
7.4
Good
8,852 reviews

Boarding

7.7

Entertainment

7.0

Overall

7.4

Comfort

7.3

Food

6.6

Crew

8.1

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 ($318), Air Canada ($344), and WestJet ($399) offers the cheapest pricing from Ottawa to Chicago O'Hare Intl Airport. These flights start at 39% 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 (92%), ANA (90%) and GoJet (89%).

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

    On average you can expect to pay $572 for a flight from Ottawa to Chicago O'Hare Intl Airport. The cheapest flight overall is $184 while the most popular route, (Ottawa - Chicago O'Hare Intl) is currently priced at $318.

  • 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 Ottawa?

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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 June 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$394Average$588FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$423Average$551FlexibilityNo cancel feeOn-time67%

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