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$135+ Cheap flights from Ottawa (YOW) to Chicago (CHI)

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 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — CHI
Jan 20 — Jan 271
Tue 1/20
Tue 1/27
1 adult, Economy
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Find cheap flights from Ottawa to Chicago with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from Ottawa to Chicago are usually found in May or June, booked 51 days in advance, depart on a Saturday or Tuesday and return on a Saturday

Cheap flight deals from Ottawa to Chicago

Cheapest flights from Ottawa to Chicago
Explore the most affordable flight options available from Ottawa to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 21, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/18. 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 12/314:20 pmYOW - ORD
1 stop23h 01mMultiple Airlines
Tue 1/62:26 pmORD - YOW
2 stops24h 37mMultiple Airlines
Deal found 12/18$461
This Kiwi.com deal was found by Cheapflights users on 12/18. 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 12/319:30 amYOW - MDW
2 stops13h 42mMultiple Airlines
Mon 1/511:05 amMDW - YOW
1 stop5h 24mMultiple Airlines
Deal found 12/18$507
This Kiwi.com deal was found by Cheapflights users on 12/17. 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.
Mon 12/299:30 amYOW - MDW
1 stop13h 28mMultiple Airlines
Thu 1/17:44 amMDW - YOW
1 stop8h 41mMultiple Airlines
Deal found 12/17$553
This Kiwi.com deal was found by Cheapflights users on 12/17. 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.
Mon 12/294:20 pmYOW - ORD
1 stop17h 42mMultiple Airlines
Thu 1/19:34 amORD - YOW
1 stop6h 51mMultiple Airlines
Deal found 12/17$555
This Mytrip deal was found by Cheapflights users on 12/18. 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 12/275:40 amYOW - ORD
1 stop14h 10mMultiple Airlines
Fri 1/165:15 amORD - YOW
1 stop18h 10mMultiple Airlines
Deal found 12/18$577
This Kiwi.com deal was found by Cheapflights users on 12/17. 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 12/316:50 amYOW - MDW
1 stop4h 15mMultiple Airlines
Sat 1/36:12 amMDW - YOW
2 stops16h 46mMultiple Airlines
Deal found 12/17$593
This Kiwi.com deal was found by Cheapflights users on 12/17. 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.
Tue 12/306:50 amYOW - MDW
2 stops7h 11mMultiple Airlines
Thu 1/17:44 amMDW - YOW
1 stop8h 41mMultiple Airlines
Deal found 12/17$603
This Kiwi.com deal was found by Cheapflights users on 12/17. 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.
Fri 12/265:40 amYOW - MDW
1 stop10h 40mMultiple Airlines
Thu 1/17:44 amMDW - YOW
1 stop8h 41mMultiple Airlines
Deal found 12/17$608
This Kiwi.com deal was found by Cheapflights users on 12/18. 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 12/319:30 amYOW - ORD
1 stop10h 32mMultiple Airlines
Mon 1/59:34 amORD - YOW
1 stop6h 51mMultiple Airlines
Deal found 12/18$613
This Kiwi.com deal was found by Cheapflights users on 12/18. 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 12/278:55 pmYOW - MDW
1 stop14h 10mPorter Airlines
Fri 1/1611:00 amMDW - YOW
1 stop5h 29mPorter Airlines
Deal found 12/18$614
This Kiwi.com deal was found by Cheapflights users on 12/17. 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.
Tue 12/309:30 amYOW - ORD
1 stop10h 32mMultiple Airlines
Thu 1/19:34 amORD - YOW
1 stop6h 51mMultiple Airlines
Deal found 12/17$615
This FlightHub deal was found by Cheapflights users on 12/17. 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.
Wed 12/316:50 amYOW - MDW
1 stop4h 15mPorter Airlines
Sat 1/34:15 pmMDW - YOW
1 stop5h 14mPorter Airlines
Deal found 12/17$631

Find flight deals from Ottawa to Chicago

Discover tips and strategies to find the most affordable flight options for your journey from Ottawa (YOW) to Chicago (CHI). 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 December 21, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$227
(Kiwi.com)

One-way from

$135
(Trip.com)

Popular in

November

Cheapest in

May

Average price

$514

Good round-trip deal

$495 or less

Good one-way deal

$326 or less
Provider with most accurate pricing for Ottawa-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ottawa-Chicago (CHI) flights.
Search Deals
From Ottawa to Chicago (CHI)
Search Deals
One-way flight from Ottawa to Chicago (CHI)
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($76 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Ottawa to Chicago (CHI).
Search Deals
Price to beat on a one-way flight from Ottawa to Chicago (CHI).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ottawa to Chicago 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 December 21, 2025.
Use the filters below to find and compare flights from Ottawa to Chicago that are best for you.

Fly from

Ottawa

Fly to

Chicago

Route

Depart

Return

Price

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 1/22

7:00 am-10:36 pm

1 stop16h 36m

Chicago O'Hare Intl

Sun 1/25

5:15 am-5:25 pm

1 stop11h 10m

$242

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Fri 2/13

5:40 am-3:20 pm

1 stop10h 40m

Chicago Midway

Sun 2/15

11:05 am-12:39 am

1 stop12h 34m

$289

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 2/12

6:50 am-8:46 pm

2 stops14h 56m

Chicago O'Hare Intl

Tue 2/17

7:00 am-5:25 pm

1 stop9h 25m

$316

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sat 2/14

3:40 pm-12:40 am

2 stops10h 00m

Chicago O'Hare Intl

Tue 2/17

7:00 am-5:25 pm

1 stop9h 25m

$336

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Tue 2/3

4:20 pm-12:05 pm

2 stops20h 45m

Chicago Midway

Tue 2/10

11:05 am-5:29 pm

1 stop5h 24m

$358

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 1/16

7:00 am-10:42 pm

2 stops16h 42m

Chicago O'Hare Intl

Fri 1/23

8:43 pm-5:15 pm

2 stops19h 32m

$374

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Sun 2/15

5:40 am-3:20 pm

1 stop10h 40m

Chicago Midway

Tue 2/17

11:05 am-5:29 pm

1 stop5h 24m

$383

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Sat 2/14

5:40 am-11:55 am

1 stop7h 15m

Chicago Midway

Mon 2/16

4:15 pm-12:39 am

1 stop7h 24m

$385

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Wed 1/7

7:00 am-10:17 pm

2 stops16h 17m

Chicago Midway

Fri 1/16

11:05 am-5:29 pm

1 stop5h 24m

$385

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Tue 2/3

7:00 am-10:05 am

1 stop4h 05m

Chicago Midway

Tue 2/10

11:00 am-5:29 pm

1 stop5h 29m

$388

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/19

Showing 1-10 of 29 results
1
2
3

Compare providers for flights from Ottawa to Chicago

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ottawa to Chicago in December.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ottawa-Chicago flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ottawa-Chicago flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ottawa-Chicago flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ottawa-Chicago flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ottawa-Chicago flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ottawa to Chicago

Have a flexible travel schedule? Discover the best time to fly to Chicago 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

How far ahead should I book a flight from Ottawa to Chicago?

Use this chart to determine the optimal time to book a round-trip flight from Ottawa to Chicago. Price data was last updated on December 12, 2025.

Booking 51 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ottawa to Chicago. 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?

Currently, September is the cheapest month in which you can book a flight from Ottawa to Chicago (average of $131). Flying from Ottawa to Chicago in December is currently the most expensive (average of $271). 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 CHI?

Find hourly flight availability from Ottawa to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 21, 2025.

It’s typically best to fly out from Ottawa to Chicago at noon. Doing so could potentially save you 34% on the flight price compared to flying in the afternoon, which is usually more expensive.

Weekly flight availability from Ottawa to Chicago

Explore weekly flight availability from Ottawa to Chicago. 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 December 21, 2025.

The most flights from YOW to CHI are scheduled on a Tuesday (8 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (5 on average).

Reviews of airlines servicing Chicago

Get insights into the airlines that provide service to Chicago. 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 Chicago. Reviews last updated December 21, 2025.
Peruse reviews from past customers who have flown with Porter Airlines and United Airlines from Ottawa to Chicago to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
399 reviews

Comfort

7.9

Entertainment

7.0

Crew

8.6

Boarding

8.2

Overall

8.0

Food

7.6

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
Porter Airlines
8.0
Very good
399 reviews
Porter Airlines
8.0
Very good
399 reviews

Comfort

7.9

Entertainment

7.0

Crew

8.6

Boarding

8.2

Overall

8.0

Food

7.6

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out
United Airlines
7.4
Good
9,099 reviews
Porter Airlines
8.0
Very good
399 reviews

Comfort

7.9

Entertainment

7.0

Crew

8.6

Boarding

8.2

Overall

8.0

Food

7.6

Reviews

1 / 20
8.0
Excellent

Mohameed,Nov 2025

LAS - YYZ

It's good. Planes are new and fresh. WiFi is best and stands out

Related info for your journey

Find useful and relevant information for your journey from Ottawa to Chicago. 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?

    Located just 6.6 mi from the city center, Ottawa is the airport most travelers will use when flying to Chicago from Ottawa. Booking flights from Ottawa (YOW) to Chicago should be relatively easy as there are 7 daily outbound flights to Chicago from 2 different airlines.

  • What are the cheapest airlines flying from Ottawa to Chicago round-trip?

    Our cheapest airline available from Ottawa to Chicago is Air Canada. Our recent data shows that you can find tickets from as low as $306 on this airline. An additional option worth looking into is United Airlines, starting at $324. Air Canada is currently priced 26% below the average price you’ll pay for this route.

  • What are the most reliable airlines from Ottawa to Chicago?

    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 Ottawa to Chicago on time: SkyWest Airlines (100%), ANA (83%), United Airlines (80%).

  • What are the cheapest flights from Ottawa to Chicago?

    Looking for the cheapest flight from Ottawa to Chicago? While on average our users pay $724, our data indicates the cheapest price to be $207. The most popular route (Ottawa - Chicago O'Hare Intl), is priced around $227.

  • Can I find deals for flights from Ottawa to Chicago that include hotel bookings?

    Yes. In addition to deals on Ottawa to Chicago flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ottawa to Chicago?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ottawa to Chicago.

  • Can I find deals for business class flights from Ottawa to Chicago?

    Yes. Cheapflights offers flight deals from Ottawa to Chicago 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?

    Currently, September is the cheapest month in which you can book a flight from Ottawa to Chicago (average of $131). Flying from Ottawa to Chicago in December is currently the most expensive (average of $271). 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?

Book flights to Chicago if you plan to visit one of these locations
Lansing
Merrillville
Hammond
Porter
Benton Harbor

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Ottawa to Chicago

Discover the top 2 airlines that operate flights from Ottawa to Chicago. 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 December 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$306Average$544FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$324Average$522FlexibilityNo cancel feeOn-time69%

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