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Illinois

$174+ 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 5/7. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — ORD
Mar 31 — Apr 71
Mon 3/31
Mon 4/7
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 March 26, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$318
(Kiwi.com)

One-way from

$174
(FlightHub)

Popular in

November

Cheapest in

April

Average price

$431

Good round-trip deal

$298 or less

Good one-way deal

$169 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 ($30 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 March 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 March 26, 2025.

This Kiwi.com deal was found by Cheapflights users on 3/25. 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 5/112:35 pmYOW - MDW
1 stop4h 49mPorter Airlines
Mon 5/59:40 amMDW - YOW
1 stop5h 53mPorter Airlines
Deal found 3/25$318
This Mytrip deal was found by Cheapflights users on 3/25. 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.
Thu 5/15:55 amYOW - ORD
1 stop10h 10mMultiple Airlines
Mon 5/512:00 pmORD - YOW
1 stop11h 22mMultiple Airlines
Deal found 3/25$363
This Kiwi.com deal was found by Cheapflights users on 3/25. 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 4/24:25 pmYOW - MDW
1 stop20h 18mMultiple Airlines
Sun 4/65:15 amMDW - YOW
1 stop10h 55mMultiple Airlines
Deal found 3/25$378
This Ticket deal was found by Cheapflights users on 3/25. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/15:25 pmYOW - ORD
Nonstop2h 29mAir Canada
Mon 5/57:00 amORD - YOW
1 stop5h 45mAir Canada
Deal found 3/25$414
This United Airlines deal was found by Cheapflights users on 3/24. 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 5/15:25 pmYOW - ORD
Nonstop2h 29mUnited Airlines
Sun 5/47:00 amORD - YOW
1 stop6h 27mUnited Airlines
Deal found 3/24$441
This FlightHub deal was found by Cheapflights users on 3/25. 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.
Sun 5/45:55 amYOW - ORD
2 stops11h 15mWestJet
Sun 5/116:24 amORD - YOW
2 stops16h 58mWestJet
Deal found 3/25$457
This Kiwi.com deal was found by Cheapflights users on 3/25. 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 4/36:15 amYOW - STL
2 stops12h 37mMultiple Airlines
Fri 4/44:57 pmSTL - YOW
1 stop23h 15mMultiple Airlines
Deal found 3/25$491
This United Airlines deal was found by Cheapflights users on 3/25. 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 5/96:05 amYOW - DEC
2 stops12h 45mUnited Airlines
Fri 5/169:50 amDEC - YOW
1 stop10h 45mUnited Airlines
Deal found 3/25$611
This Delta deal was found by Cheapflights users on 3/25. 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.
Thu 5/15:55 amYOW - MDW
2 stops13h 25mDelta
Mon 5/59:20 amMDW - YOW
2 stops14h 02mDelta
Deal found 3/25$694
This Delta deal was found by Cheapflights users on 3/25. 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.
Thu 5/15:55 amYOW - ORD
2 stops11h 13mDelta
Mon 5/59:30 amORD - YOW
2 stops13h 52mDelta
Deal found 3/25$694
This deal was found by Cheapflights users on 3/24. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1710:05 amYOW - STL
1 stop5h 44mAir Canada
Sun 4/203:30 pmSTL - YOW
1 stop5h 04mAir Canada
Deal found 3/24$705
This United Airlines deal was found by Cheapflights users on 3/24. 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 4/176:05 amYOW - STL
2 stops9h 37mUnited Airlines
Mon 4/219:39 amSTL - YOW
1 stop10h 56mUnited Airlines
Deal found 3/24$720

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 March 26, 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

Thu 5/1

12:35 pm-4:24 pm

1 stop4h 49m

Chicago Midway

Mon 5/5

9:40 am-4:33 pm

1 stop5h 53m

$318

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 5/1

5:55 am-3:05 pm

1 stop10h 10m

Chicago O'Hare Intl

Mon 5/5

12:00 pm-12:22 am

1 stop11h 22m

$363

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Fri 4/18

5:55 am-4:40 pm

1 stop11h 45m

Chicago Midway

Tue 4/22

11:15 am-12:09 am

1 stop11h 54m

$387

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 5/1

5:25 pm-6:54 pm

Nonstop2h 29m

Chicago O'Hare Intl

Mon 5/5

7:00 am-1:45 pm

1 stop5h 45m

$414

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 5/1

5:25 pm-6:54 pm

Nonstop2h 29m

Chicago O'Hare Intl

Sun 5/4

7:00 am-2:27 pm

1 stop6h 27m

$441

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sun 5/4

5:55 am-4:10 pm

2 stops11h 15m

Chicago O'Hare Intl

Sun 5/11

6:24 am-12:22 am

2 stops16h 58m

$457

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Thu 4/17

5:45 pm-11:45 am

3 stops43h 00m

Lambert-St Louis

Mon 4/21

12:15 pm-5:09 pm

3 stops27h 54m

$551

OttawaDecatur

YOW - DEC

YOWDEC

Ottawa

Fri 5/9

6:05 am-5:50 pm

2 stops12h 45m

Decatur Arpt

Fri 5/16

9:50 am-9:35 pm

1 stop10h 45m

$611

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Thu 5/1

5:55 am-6:20 pm

2 stops13h 25m

Chicago Midway

Mon 5/5

9:20 am-12:22 am

2 stops14h 02m

$694

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 5/1

5:55 am-4:08 pm

2 stops11h 13m

Chicago O'Hare Intl

Mon 5/5

9:30 am-12:22 am

2 stops13h 52m

$694

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/25

Showing 1-10 of 24 results
1
2
3

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 $323). 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 March 26, 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.

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 March 26, 2025.
Read through reviews of airlines operating flights from Ottawa to Illinois, such as Delta, Porter Airlines and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,891 reviews

Overall

8.0

Comfort

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,891 reviews
Delta
8.0
Very good
7,891 reviews

Overall

8.0

Comfort

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Porter Airlines
7.9
Good
276 reviews
Delta
8.0
Very good
7,891 reviews

Overall

8.0

Comfort

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,608 reviews
Delta
8.0
Very good
7,891 reviews

Overall

8.0

Comfort

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
WestJet
7.2
Good
2,785 reviews
Delta
8.0
Very good
7,891 reviews

Overall

8.0

Comfort

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Air Canada
7.0
Good
8,967 reviews
Delta
8.0
Very good
7,891 reviews

Overall

8.0

Comfort

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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 $174. WestJet flights start at $215 while deals on Air Canada start at $240 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 ANA (81%), GoJet (80%) and Avianca (80%).

  • What are the cheapest flights from Ottawa to Illinois?

    While on average a flight from Ottawa to Illinois is generally $446, our data shows the cheapest flight currently is $141. When looking at the most popular route, (Ottawa - Chicago O'Hare Intl), you can expect to pay $363 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 $323). 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 March 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$272Average$433FlexibilityNo cancel feeOn-time52%
United AirlinesCheapest$410Average$685FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$423Average$551FlexibilityNo cancel feeOn-time67%
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