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Illinois

$152+ 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 1/22. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — ORD
ene. 15 — ene. 221
mié. 1/15
mié. 1/22
1 adult, Economy
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Cheap flight deals from Ottawa to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from Ottawa (YOW) to Illinois (USIL). 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 enero 10, 2025.

Round-trip from

$280
(oojo)

One-way from

$152
(Kiwi.com)
From Ottawa to Illinois
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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 enero 10, 2025.

This oojo deal was found by Cheapflights users on 1/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 2/148:40 amYOW - MDW
1 stop4h 30mPorter Airlines
lun. 2/171:05 pmMDW - YOW
1 stop4h 29mPorter Airlines
Deal found 1/9$280
This Mytrip deal was found by Cheapflights users on 1/8. 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.
vie. 1/174:00 pmYOW - ORD
2 stops21h 57mMultiple Airlines
mar. 1/215:35 amORD - YOW
1 stop8h 22mMultiple Airlines
Deal found 1/8$307
This Kiwi.com deal was found by Cheapflights users on 1/9. 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.
vie. 1/178:10 pmYOW - MDW
2 stops28h 19mMultiple Airlines
lun. 1/2011:33 amMDW - YOW
1 stop7h 44mMultiple Airlines
Deal found 1/9$404
This United Airlines deal was found by Cheapflights users on 1/10. 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.
vie. 2/145:00 pmYOW - ORD
Nonstop2h 34mUnited Airlines
vie. 2/217:26 amORD - YOW
Nonstop2h 05mUnited Airlines
Deal found 1/10$407
This Air Canada deal was found by Cheapflights users on 1/9. 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.
jue. 3/611:00 amYOW - ORD
1 stop4h 45mAir Canada
jue. 3/136:13 pmORD - YOW
Nonstop2h 11mAir Canada
Deal found 1/9$414
This Kissandfly.com deal was found by Cheapflights users on 1/9. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 2/86:20 amYOW - ORD
Nonstop2h 40mLufthansa
dom. 2/91:55 pmORD - YOW
Nonstop2h 11mLufthansa
Deal found 1/9$431
This Kiwi.com deal was found by Cheapflights users on 1/9. 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.
vie. 3/144:20 pmYOW - STL
1 stop8h 29mMultiple Airlines
jue. 3/208:58 amSTL - YOW
1 stop10h 14mMultiple Airlines
Deal found 1/9$523
This FlightHub deal was found by Cheapflights users on 1/9. 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.
vie. 2/145:55 amYOW - ORD
2 stops17h 41mWestJet
lun. 2/174:45 pmORD - YOW
1 stop23h 03mWestJet
Deal found 1/9$533
This United Airlines deal was found by Cheapflights users on 1/9. 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.
dom. 2/235:50 pmYOW - DEC
2 stops16h 00mUnited Airlines
dom. 3/210:00 amDEC - YOW
1 stop10h 24mUnited Airlines
Deal found 1/9$589
This United Airlines deal was found by Cheapflights users on 1/9. 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.
sáb. 4/192:45 pmYOW - STL
2 stops8h 03mUnited Airlines
sáb. 4/2610:40 amSTL - YOW
1 stop5h 26mUnited Airlines
Deal found 1/9$601
This Air Canada deal was found by Cheapflights users on 1/9. 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.
vie. 3/1410:05 amYOW - STL
1 stop6h 01mAir Canada
mar. 3/1810:03 amSTL - YOW
1 stop6h 03mAir Canada
Deal found 1/9$617
This FlightHub deal was found by Cheapflights users on 1/9. 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.
dom. 4/205:55 amYOW - STL
2 stops8h 24mWestJet
vie. 4/254:00 pmSTL - YOW
2 stops31h 09mWestJet
Deal found 1/9$730

Find flights from Ottawa to Illinois within your budget

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 enero 10, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

vie. 2/14

8:40 am-12:10 pm

1 stop4h 30m

Chicago Midway

lun. 2/17

1:05 pm-6:34 pm

1 stop4h 29m

$280

OttawaChicago

YOW - ORD

YOWORD

Ottawa

mié. 2/5

6:10 pm-5:31 am

1 stop12h 21m

Chicago O'Hare Intl

mié. 2/12

5:15 am-3:55 pm

1 stop9h 40m

$332

OttawaChicago

YOW - ORD

YOWORD

Ottawa

vie. 2/14

5:00 pm-6:34 pm

Nonstop2h 34m

Chicago O'Hare Intl

vie. 2/21

7:26 am-10:31 am

Nonstop2h 05m

$407

OttawaChicago

YOW - ORD

YOWORD

Ottawa

lun. 3/31

5:25 pm-6:54 pm

Nonstop2h 29m

Chicago O'Hare Intl

lun. 4/7

3:35 pm-10:07 pm

1 stop5h 32m

$412

OttawaChicago

YOW - ORD

YOWORD

Ottawa

sáb. 2/8

6:20 am-8:00 am

Nonstop2h 40m

Chicago O'Hare Intl

dom. 2/9

1:55 pm-5:06 pm

Nonstop2h 11m

$431

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

sáb. 2/8

5:55 am-12:10 pm

1 stop7h 15m

Chicago Midway

dom. 2/9

1:05 pm-8:34 pm

1 stop6h 29m

$432

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

vie. 3/14

4:20 pm-11:49 pm

1 stop8h 29m

Lambert-St Louis

jue. 3/20

8:58 am-8:12 pm

1 stop10h 14m

$523

OttawaChicago

YOW - ORD

YOWORD

Ottawa

vie. 2/14

5:55 am-10:36 pm

2 stops17h 41m

Chicago O'Hare Intl

lun. 2/17

4:45 pm-4:48 pm

1 stop23h 03m

$533

OttawaDecatur

YOW - DEC

YOWDEC

Ottawa

dom. 2/23

5:50 pm-8:50 am

2 stops16h 00m

Decatur Arpt

dom. 3/2

10:00 am-9:24 pm

1 stop10h 24m

$589

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

sáb. 4/19

2:45 pm-9:48 pm

2 stops8h 03m

Lambert-St Louis

sáb. 4/26

10:40 am-5:06 pm

1 stop5h 26m

$601

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/8

Showing 1-10 of 24 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.

Travel insights for flights from Ottawa to Illinois

Get recent, data-driven insights about flights from Ottawa to Illinois including ideal travel times, pricing trends, and more.

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 $318). 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 enero 10, 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 enero 10, 2025.

The most flights from YOW to USIL are scheduled on a Monday (8 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (8 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 enero 10, 2025.
Read through reviews of airlines operating flights from Ottawa to Illinois, such as Air Canada, United Airlines and WestJet. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,501 reviews

Entertainment

7.9

Comfort

8.0

Food

7.3

Boarding

8.2

Crew

8.6

Overall

8.0

Reviews

1 / 10

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

Delta
8.0
Very good
8,501 reviews
Delta
8.0
Very good
8,501 reviews

Entertainment

7.9

Comfort

8.0

Food

7.3

Boarding

8.2

Crew

8.6

Overall

8.0

Reviews

1 / 10

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

Porter Airlines
7.9
Good
274 reviews
Delta
8.0
Very good
8,501 reviews

Entertainment

7.9

Comfort

8.0

Food

7.3

Boarding

8.2

Crew

8.6

Overall

8.0

Reviews

1 / 10

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

United Airlines
7.4
Good
8,944 reviews
Delta
8.0
Very good
8,501 reviews

Entertainment

7.9

Comfort

8.0

Food

7.3

Boarding

8.2

Crew

8.6

Overall

8.0

Reviews

1 / 10

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

WestJet
7.2
Good
2,820 reviews
Delta
8.0
Very good
8,501 reviews

Entertainment

7.9

Comfort

8.0

Food

7.3

Boarding

8.2

Crew

8.6

Overall

8.0

Reviews

1 / 10

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

Air Canada
7.0
Good
8,526 reviews
Delta
8.0
Very good
8,501 reviews

Entertainment

7.9

Comfort

8.0

Food

7.3

Boarding

8.2

Crew

8.6

Overall

8.0

Reviews

1 / 10

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 $165. United Airlines flights start at $227 while deals on Air Canada start at $232 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 (84%), ANA (80%) and Air Canada (74%).

  • What are the cheapest flights from Ottawa to Illinois?

    While on average a flight from Ottawa to Illinois is generally $564, our data shows the cheapest flight currently is $184. When looking at the most popular route, (Ottawa - Chicago O'Hare Intl), you can expect to pay $288 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 $318). 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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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 enero 10, 2025.
AirlineCheapestAverageFlexibilityOn-time
Porter AirlinesCheapest$266Average$425FlexibilityNo cancel feeOn-time52%
United AirlinesCheapest$410Average$560FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$423Average$554FlexibilityNo cancel feeOn-time67%
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