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Illinois

$185+ 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 7/9. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — ORD
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$307
(Kiwi.com)

One-way from

$185
(Kiwi.com)

Popular in

November

Cheapest in

May

Average price

$351

Good round-trip deal

$390 or less

Good one-way deal

$245 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. 6% potential increase in price ($28 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in May 2025
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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 May 1, 2025.

This Kiwi.com deal was found by Cheapflights users on 4/30. 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 6/612:35 pmYOW - MDW
1 stop5h 19mPorter Airlines
Sun 6/229:40 amMDW - YOW
1 stop5h 53mPorter Airlines
Deal found 4/30$307
This Kiwi.com deal was found by Cheapflights users on 4/30. 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 6/55:55 amYOW - MDW
1 stop11h 29mMultiple Airlines
Sun 6/89:40 amMDW - YOW
1 stop13h 42mMultiple Airlines
Deal found 4/30$322
This Kiwi.com deal was found by Cheapflights users on 4/30. 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 5/2811:15 amYOW - ORD
1 stop9h 52mMultiple Airlines
Wed 6/45:51 amORD - YOW
1 stop8h 05mMultiple Airlines
Deal found 4/30$326
This Air Canada deal was found by Cheapflights users on 4/29. 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 6/195:25 pmYOW - ORD
Nonstop2h 28mAir Canada
Mon 6/236:15 pmORD - YOW
Nonstop2h 20mAir Canada
Deal found 4/29$421
This United Airlines deal was found by Cheapflights users on 4/30. 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 5/307:29 pmYOW - ORD
1 stop13h 33mUnited Airlines
Fri 6/69:31 pmORD - YOW
1 stop11h 27mUnited Airlines
Deal found 4/30$492
This Kiwi.com deal was found by Cheapflights users on 4/30. 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 6/144:25 pmYOW - STL
1 stop8h 28mMultiple Airlines
Sat 6/215:47 pmSTL - YOW
1 stop22h 19mMultiple Airlines
Deal found 4/30$512
This WestJet deal was found by Cheapflights users on 4/30. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/73:45 pmYOW - ORD
1 stop25h 59mWestJet
Tue 6/105:30 pmORD - YOW
2 stops21h 50mWestJet
Deal found 4/30$583
This Delta deal was found by Cheapflights users on 4/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/255:55 amYOW - ORD
2 stops11h 23mDelta
Tue 7/299:00 amORD - YOW
2 stops14h 22mDelta
Deal found 4/30$617
This United Airlines deal was found by Cheapflights users on 4/30. 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 5/306:12 amYOW - STL
1 stop5h 37mUnited Airlines
Sun 6/155:00 amSTL - YOW
2 stops8h 27mUnited Airlines
Deal found 4/30$630
This Delta deal was found by Cheapflights users on 4/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/245:55 amYOW - MDW
2 stops13h 46mDelta
Fri 6/2712:44 pmMDW - YOW
2 stops10h 38mDelta
Deal found 4/30$713
This WestJet deal was found by Cheapflights users on 4/30. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/145:55 amYOW - BMI
2 stops17h 51mWestJet
Sat 6/216:00 amBMI - YOW
2 stops17h 22mWestJet
Deal found 4/30$854
This WestJet deal was found by Cheapflights users on 4/29. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/197:15 pmYOW - MDW
2 stops15h 26mWestJet
Mon 6/239:21 amMDW - YOW
2 stops14h 20mWestJet
Deal found 4/29$877

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 May 1, 2025.
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 - MDW

YOWMDW

Ottawa

Fri 6/6

12:35 pm-4:54 pm

1 stop5h 19m

Chicago Midway

Sun 6/22

9:40 am-4:33 pm

1 stop5h 53m

$307

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Thu 6/5

5:55 am-4:24 pm

1 stop11h 29m

Chicago Midway

Sun 6/8

9:40 am-12:22 am

1 stop13h 42m

$322

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Wed 5/28

11:15 am-8:07 pm

1 stop9h 52m

Chicago O'Hare Intl

Wed 6/4

5:51 am-2:56 pm

1 stop8h 05m

$326

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 6/19

5:25 pm-6:53 pm

Nonstop2h 28m

Chicago O'Hare Intl

Mon 6/23

6:15 pm-9:35 pm

Nonstop2h 20m

$421

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 6/13

5:25 pm-6:53 pm

Nonstop2h 28m

Chicago O'Hare Intl

Fri 6/20

10:56 am-2:04 pm

Nonstop2h 08m

$477

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Sat 6/14

4:25 pm-11:53 pm

1 stop8h 28m

Lambert-St Louis

Sat 6/21

5:47 pm-5:06 pm

1 stop22h 19m

$512

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 5/30

5:55 am-10:41 pm

2 stops17h 46m

Chicago O'Hare Intl

Sun 6/29

1:40 pm-5:25 am

1 stop14h 45m

$556

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sat 7/12

5:55 am-12:50 pm

2 stops7h 55m

Chicago O'Hare Intl

Tue 7/15

9:00 am-12:22 am

2 stops14h 22m

$585

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 5/30

6:12 am-10:49 am

1 stop5h 37m

Lambert-St Louis

Sun 6/15

5:00 am-2:27 pm

2 stops8h 27m

$630

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Sat 7/5

5:55 am-6:41 pm

2 stops13h 46m

Chicago Midway

Tue 7/8

9:25 am-12:22 am

2 stops13h 57m

$635

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 22 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, August is the cheapest month in which you can book a flight from Ottawa to Illinois (average of $245). Flying from Ottawa to Illinois 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 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 May 1, 2025.

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 May 1, 2025.

The most flights from YOW to USIL 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).

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 May 1, 2025.
Read through reviews of airlines operating flights from Ottawa to Illinois, such as Porter Airlines, Delta and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Porter Airlines
8.0
Very good
285 reviews

Boarding

8.2

Food

7.6

Overall

8.0

Comfort

8.1

Entertainment

7.0

Crew

8.8

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
Porter Airlines
8.0
Very good
285 reviews
Porter Airlines
8.0
Very good
285 reviews

Boarding

8.2

Food

7.6

Overall

8.0

Comfort

8.1

Entertainment

7.0

Crew

8.8

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
Delta
8.0
Very good
7,934 reviews
Porter Airlines
8.0
Very good
285 reviews

Boarding

8.2

Food

7.6

Overall

8.0

Comfort

8.1

Entertainment

7.0

Crew

8.8

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
United Airlines
7.4
Good
8,696 reviews
Porter Airlines
8.0
Very good
285 reviews

Boarding

8.2

Food

7.6

Overall

8.0

Comfort

8.1

Entertainment

7.0

Crew

8.8

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
WestJet
7.2
Good
2,826 reviews
Porter Airlines
8.0
Very good
285 reviews

Boarding

8.2

Food

7.6

Overall

8.0

Comfort

8.1

Entertainment

7.0

Crew

8.8

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you
Air Canada
7.0
Good
9,245 reviews
Porter Airlines
8.0
Very good
285 reviews

Boarding

8.2

Food

7.6

Overall

8.0

Comfort

8.1

Entertainment

7.0

Crew

8.8

Reviews

1 / 18
10.0
Excellent

Anonymous,Apr 2025

MCO - YHZ

A good flight and the crew was very nice. Thank you

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.

  • 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 $191. Air Canada flights start at $231 while deals on United Airlines start at $263 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 Avianca (90%), Republic Airways (83%) and ANA (82%).

  • What are the cheapest flights from Ottawa to Illinois?

    While on average a flight from Ottawa to Illinois is generally $680, our data shows the cheapest flight currently is $178. When looking at the most popular route, (Ottawa - Chicago O'Hare Intl), you can expect to pay $365 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, August is the cheapest month in which you can book a flight from Ottawa to Illinois (average of $245). Flying from Ottawa to Illinois 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

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Alternative routes for Ottawa to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Ottawa to Illinois

Discover the top 3 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$291Average$372FlexibilityNo cancel feeOn-time52%
United AirlinesCheapest$410Average$606FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$423Average$553FlexibilityNo cancel feeOn-time67%

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