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$149+ Cheap flights from Ottawa (YOW) to Illinois

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 2/5. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — ORD
Feb 6 — Feb 131
Fri 2/6
Fri 2/13
1 adult, Economy
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Cheap flight deals from Ottawa to Illinois

Keep the following information in mind while searching for Ottawa to Illinois flight deals. Data was last updated January 7, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$245
(Kiwi.com)

One-way from

$149
(Kiwi.com)

Popular in

January

Cheapest in

May

Average price

$615

Good round-trip deal

$482 or less

Good one-way deal

$322 or less
Provider with most accurate pricing for Ottawa-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Ottawa-Chicago (CHI) flights.
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From Ottawa to Illinois
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One-way flight from Ottawa to Illinois
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Highest demand for flights based on searches. 14% potential increase in price ($74 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Price to beat on a round-trip flight from Ottawa to Illinois.
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Price to beat on a one-way flight from Ottawa to Illinois.
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Find flight deals from Ottawa to Illinois

Cheapest flights from Ottawa to Illinois
Explore the most affordable flight options available from Ottawa to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 7, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/5. 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 2/54:20 pmYOW - ORD
1 stop19h 15mMultiple Airlines
Sun 2/83:00 pmORD - YOW
1 stop25h 25mMultiple Airlines
Deal found 1/5$243
This Kiwi.com deal was found by Cheapflights users on 1/5. 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 2/57:00 amYOW - ORD
1 stop16h 36mMultiple Airlines
Mon 2/97:20 amORD - YOW
1 stop9h 05mMultiple Airlines
Deal found 1/5$244
This Kiwi.com deal was found by Cheapflights users on 1/6. 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 2/37:00 amYOW - ORD
1 stop15h 03mMultiple Airlines
Tue 2/107:20 amORD - YOW
1 stop9h 05mMultiple Airlines
Deal found 1/6$247
This Kiwi.com deal was found by Cheapflights users on 1/6. 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 2/59:40 amYOW - ORD
1 stop14h 36mMultiple Airlines
Tue 2/1012:44 pmORD - YOW
1 stop27h 29mMultiple Airlines
Deal found 1/6$252
This Mytrip deal was found by Cheapflights users on 1/5. 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.
Mon 2/24:15 pmYOW - ORD
1 stop8h 32mMultiple Airlines
Mon 2/95:15 amORD - YOW
1 stop11h 10mMultiple Airlines
Deal found 1/5$260
This Kiwi.com deal was found by Cheapflights users on 1/6. 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 2/64:35 pmYOW - ORD
2 stops17h 37mMultiple Airlines
Tue 2/1012:44 pmORD - YOW
1 stop27h 29mMultiple Airlines
Deal found 1/6$267
This Kiwi.com deal was found by Cheapflights users on 1/5. 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 2/67:00 amYOW - MDW
2 stops13h 52mMultiple Airlines
Mon 2/91:00 pmMDW - YOW
1 stop9h 58mMultiple Airlines
Deal found 1/5$292
This Kiwi.com deal was found by Cheapflights users on 1/5. 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 2/67:00 amYOW - MDW
2 stops13h 52mMultiple Airlines
Tue 2/1011:05 amMDW - YOW
1 stop12h 34mMultiple Airlines
Deal found 1/5$293
This United Airlines deal was found by Cheapflights users on 1/7. 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.
Wed 2/43:10 pmYOW - STL
2 stops8h 48mUnited Airlines
Wed 2/119:57 amSTL - YOW
2 stops12h 57mUnited Airlines
Deal found 1/7$294
This Mytrip deal was found by Cheapflights users on 1/5. 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 2/75:40 amYOW - MDW
1 stop7h 10mMultiple Airlines
Tue 2/1011:05 amMDW - YOW
1 stop12h 34mMultiple Airlines
Deal found 1/5$301
This Kiwi.com deal was found by Cheapflights users on 1/6. 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 2/57:00 amYOW - MDW
1 stop4h 10mMultiple Airlines
Mon 2/91:00 pmMDW - YOW
1 stop9h 58mMultiple Airlines
Deal found 1/6$308
This Kiwi.com deal was found by Cheapflights users on 1/6. 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 2/57:00 amYOW - MDW
1 stop4h 05mMultiple Airlines
Tue 2/1011:05 amMDW - YOW
1 stop12h 34mMultiple Airlines
Deal found 1/6$310

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ottawa to Illinois 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 January 7, 2026.
Use the filters below to find and compare flights from Ottawa to Illinois that are best for you.

Fly from

Ottawa

Fly to

Illinois

Route

Depart

Return

Price

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 2/5

7:00 am-10:36 pm

1 stop16h 36m

Chicago O'Hare Intl

Mon 2/9

7:20 am-5:25 pm

1 stop9h 05m

$244

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 2/5

7:00 am-10:36 pm

1 stop16h 36m

Chicago O'Hare Intl

Sun 2/8

3:00 pm-5:25 pm

1 stop25h 25m

$245

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 2/6

7:00 am-7:38 pm

1 stop13h 38m

Chicago O'Hare Intl

Mon 2/9

7:20 am-5:25 pm

1 stop9h 05m

$252

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Mon 2/2

4:15 pm-11:47 pm

1 stop8h 32m

Chicago O'Hare Intl

Mon 2/9

5:15 am-5:25 pm

1 stop11h 10m

$260

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 2/6

7:00 am-9:03 pm

1 stop15h 03m

Chicago O'Hare Intl

Tue 2/10

5:15 am-5:25 pm

1 stop11h 10m

$267

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 1/23

3:55 pm-10:42 pm

1 stop7h 47m

Chicago O'Hare Intl

Sun 1/25

3:05 pm-12:42 am

2 stops32h 37m

$293

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Wed 2/4

3:10 pm-10:58 pm

2 stops8h 48m

Lambert-St Louis

Wed 2/11

7:00 am-1:32 pm

1 stop5h 32m

$294

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Thu 2/5

6:50 pm-10:10 am

1 stop16h 20m

Chicago Midway

Mon 2/9

1:00 pm-11:58 pm

1 stop9h 58m

$308

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Tue 2/3

7:00 am-10:05 am

1 stop4h 05m

Chicago Midway

Tue 2/10

11:05 am-12:39 am

1 stop12h 34m

$311

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sat 1/17

4:15 pm-8:57 pm

1 stop29h 42m

Chicago O'Hare Intl

Tue 1/20

7:20 am-5:25 pm

1 stop9h 05m

$313

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/7

Showing 1-10 of 46 results
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Best time to book a flight from Ottawa to Illinois

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

What is the cheapest month to book a flight from Ottawa to Illinois?

Currently, September is the cheapest month in which you can book a flight from Ottawa to Illinois (average of $131). Flying from Ottawa to Illinois in March is currently the most expensive (average of $249). 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 IL?

Find hourly flight availability from Ottawa to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 7, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ottawa to Illinois as you normally would.

Weekly flight availability from Ottawa to Illinois

Explore weekly flight availability from Ottawa to Illinois. 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 January 7, 2026.

The most flights from YOW to USIL 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 Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated January 7, 2026.
See what other customers who have flown with Porter Airlines, United Airlines, and Air Canada from Ottawa to Illinois 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.
Porter Airlines
8.0
Very good
406 reviews

Crew

8.6

Comfort

7.9

Entertainment

7.0

Boarding

8.2

Food

7.6

Overall

8.0

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
406 reviews
Porter Airlines
8.0
Very good
406 reviews

Crew

8.6

Comfort

7.9

Entertainment

7.0

Boarding

8.2

Food

7.6

Overall

8.0

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
9,138 reviews
Porter Airlines
8.0
Very good
406 reviews

Crew

8.6

Comfort

7.9

Entertainment

7.0

Boarding

8.2

Food

7.6

Overall

8.0

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
Air Canada
7.1
Good
10,600 reviews
Porter Airlines
8.0
Very good
406 reviews

Crew

8.6

Comfort

7.9

Entertainment

7.0

Boarding

8.2

Food

7.6

Overall

8.0

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 Illinois. 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 Illinois?

    Located just 6.6 mi from the city center, Ottawa (YOW) is the airport most travelers will use when flying to Illinois from Ottawa.

  • How long is the flight from Ottawa to Illinois?

    A quick flight from Ottawa to Illinois can take about 4h 10m. United Airlines provides one of the quickest options available for as low as $323. The distance from Ottawa to Illinois is about 651 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Ottawa to Illinois one-way?

    To fly one-way, consider booking your trip with Porter Airlines, which is currently one of the cheapest options available, starting at $130. United Airlines flights start at $193 while deals on Air Canada start at $234 one-way.

  • What are the most popular routes from Ottawa to Illinois?

    When deciding which route to take from Ottawa to Illinois consider Ottawa - Chicago O'Hare Intl, Ottawa - Chicago Midway or Ottawa - Lambert-St Louis as they are the most popular.

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

    The top 3 most reliable airlines when flying from Ottawa to Illinois are SkyWest Airlines (100%), ANA (83%) and Avianca (82%).

  • What are the cheapest flights from Ottawa to Illinois?

    While on average a flight from Ottawa to Illinois is generally $775, our data shows the cheapest flight currently is $245. When looking at the most popular route, (Ottawa - Chicago O'Hare Intl), you can expect to pay $245 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ottawa to Illinois 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 Illinois?

    Currently, September is the cheapest month in which you can book a flight from Ottawa to Illinois (average of $131). Flying from Ottawa to Illinois in March is currently the most expensive (average of $249). 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.

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See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Ottawa to Illinois

Discover the top 2 airlines that operate flights from Ottawa to Illinois. 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 January 7, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$306Average$544FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$324Average$522FlexibilityNo cancel feeOn-time69%

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