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Cheap flights from Illinois to Ottawa from C$ 187

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 2/10. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — YOW
14 Oct — 21 Oct1
1 adult
1 adult, Economy

Cheap flight deals from Illinois to Ottawa

Keep the following information in mind while searching for Illinois to Ottawa flight deals. Data was last updated 14 September 2025.

Round-trip from

C$ 424

One-way from

C$ 187

Popular in

November

Cheapest in

May

Average price

C$ 742

Good one-way deal

C$ 243 or less
27/9-30/9
  • 27/9-30/9
  • 3 total stops
  • 52h 55m total
  • Illinois to Ottawa
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2/10
  • 2/10
  • 2 total stops
  • 13h 11m total
  • Illinois to Ottawa
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Highest demand for flights based on searches. 4% potential increase in price (C$ 48 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 21 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a one-way flight from Illinois to Ottawa.
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Find flight deals from Illinois to Ottawa

Cheapest flights from Illinois to Ottawa
Explore the most affordable flight options available from Illinois to Ottawa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 14 September 2025.

Sat 27/99:35 a.m.MDW - YOW
1 stop7h 34mMultiple Airlines
Tue 30/94:25 p.m.YOW - MDW
2 stops45h 21mMultiple Airlines
Deal found 14/9C$ 424
Fri 14/112:20 p.m.ORD - YOW
1 stop9h 20mMultiple Airlines
Mon 17/115:40 a.m.YOW - ORD
2 stops15h 51mMultiple Airlines
Deal found 13/9C$ 428
Fri 17/107:43 p.m.ORD - YOW
1 stop20h 37mMultiple Airlines
Mon 20/107:50 a.m.YOW - ORD
1 stop9h 53mMultiple Airlines
Deal found 13/9C$ 437
Wed 15/109:35 a.m.MDW - YOW
1 stop7h 34mPorter Airlines
Mon 20/101:25 p.m.YOW - MDW
1 stop3h 59mPorter Airlines
Deal found 12/9C$ 439
Tue 14/106:58 p.m.ORD - YOW
2 stops18h 58mMultiple Airlines
Thu 16/104:25 p.m.YOW - ORD
1 stop16h 09mMultiple Airlines
Deal found 13/9C$ 439
Fri 10/107:43 p.m.ORD - YOW
1 stop20h 37mMultiple Airlines
Sun 12/106:00 a.m.YOW - ORD
1 stop11h 43mMultiple Airlines
Deal found 12/9C$ 440
Wed 15/107:43 p.m.ORD - YOW
1 stop20h 37mMultiple Airlines
Mon 20/105:55 a.m.YOW - ORD
2 stops18h 49mMultiple Airlines
Deal found 13/9C$ 442
Mon 3/116:40 a.m.ORD - YOW
1 stop9h 45mMultiple Airlines
Sun 9/116:00 a.m.YOW - ORD
1 stop32h 35mMultiple Airlines
Deal found 12/9C$ 444
Fri 10/105:30 p.m.ORD - YOW
1 stop23h 50mWestJet
Sun 12/106:00 a.m.YOW - ORD
1 stop11h 43mWestJet
Deal found 12/9C$ 446
Fri 17/105:30 p.m.ORD - YOW
1 stop18h 30mMultiple Airlines
Sun 19/103:50 p.m.YOW - ORD
1 stop20h 00mMultiple Airlines
Deal found 12/9C$ 447
Fri 17/109:45 a.m.MDW - YOW
2 stops13h 37mMultiple Airlines
Mon 20/101:25 p.m.YOW - MDW
1 stop3h 59mMultiple Airlines
Deal found 13/9C$ 454
Fri 3/105:05 a.m.ORD - YOW
1 stop11h 15mMultiple Airlines
Sun 5/103:50 p.m.YOW - ORD
1 stop20h 00mMultiple Airlines
Deal found 14/9C$ 454

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Ottawa 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 629,999 searches. Data last updated 14 September 2025.
Use the filters below to find and compare flights from Illinois to Ottawa that are best for you.

Fly from

Illinois

Fly to

Ottawa

Route

Depart

Return

Price

ChicagoOttawa

MDW - YOW

MDWYOW

Chicago Midway

Sat 27/9

9:35 a.m.-6:09 p.m.

1 stop7h 34m

Ottawa

Tue 30/9

4:25 p.m.-12:46 p.m.

2 stops45h 21m

C$ 424

ChicagoOttawa

MDW - YOW

MDWYOW

Chicago Midway

Wed 15/10

9:35 a.m.-6:09 p.m.

1 stop7h 34m

Ottawa

Mon 20/10

1:25 p.m.-4:24 p.m.

1 stop3h 59m

C$ 439

ChicagoOttawa

ORD - YOW

ORDYOW

Chicago O'Hare Intl

Wed 15/10

7:43 p.m.-5:20 p.m.

1 stop20h 37m

Ottawa

Mon 20/10

5:55 a.m.-11:44 p.m.

2 stops18h 49m

C$ 443

ChicagoOttawa

ORD - YOW

ORDYOW

Chicago O'Hare Intl

Mon 3/11

6:40 a.m.-5:25 p.m.

1 stop9h 45m

Ottawa

Sun 9/11

6:00 a.m.-1:35 p.m.

1 stop32h 35m

C$ 444

ChicagoOttawa

MDW - YOW

MDWYOW

Chicago Midway

Fri 17/10

9:45 a.m.-12:22 a.m.

2 stops13h 37m

Ottawa

Sun 19/10

1:15 p.m.-4:24 p.m.

1 stop4h 09m

C$ 457

ChicagoOttawa

ORD - YOW

ORDYOW

Chicago O'Hare Intl

Fri 5/12

2:20 p.m.-12:40 a.m.

1 stop9h 20m

Ottawa

Tue 16/12

7:00 a.m.-9:00 p.m.

1 stop15h 00m

C$ 468

ChicagoOttawa

ORD - YOW

ORDYOW

Chicago O'Hare Intl

Fri 10/10

5:30 p.m.-1:03 p.m.

2 stops18h 33m

Ottawa

Sun 12/10

6:00 a.m.-4:43 p.m.

1 stop11h 43m

C$ 473

ChicagoOttawa

MDW - YOW

MDWYOW

Chicago Midway

Wed 15/10

9:35 a.m.-4:34 p.m.

1 stop5h 59m

Ottawa

Mon 20/10

4:25 p.m.-1:38 p.m.

2 stops22h 13m

C$ 475

ChicagoOttawa

ORD - YOW

ORDYOW

Chicago O'Hare Intl

Wed 22/10

7:43 p.m.-12:22 a.m.

2 stops27h 39m

Ottawa

Fri 24/10

5:55 a.m.-12:17 a.m.

2 stops19h 22m

C$ 479

ChicagoOttawa

MDW - YOW

MDWYOW

Chicago Midway

Fri 3/10

9:35 a.m.-4:34 p.m.

1 stop5h 59m

Ottawa

Sun 5/10

1:15 p.m.-4:24 p.m.

1 stop4h 09m

C$ 483

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/9

Showing 1-10 of 34 results
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Best time to book a flight from Illinois to Ottawa

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

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

Currently, October is the cheapest month in which you can book a flight from Illinois to Ottawa (average of C$ 224). Flying from Illinois to Ottawa in December is currently the most expensive (average of C$ 326). 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 IL to YOW?

Find hourly flight availability from Illinois to Ottawa. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 14 September 2025.

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

Weekly flight availability from Illinois to Ottawa

Explore weekly flight availability from Illinois to Ottawa. 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 14 September 2025.

The most flights from USIL to YOW 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).

Related info for your journey

Find useful and relevant information for your journey from Illinois to Ottawa. 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 into for flights to Ottawa from Illinois?

    Most people fly into Ottawa (YOW) if they book a flight to Ottawa from Illinois. Ottawa is conveniently located just 10.6 km from Ottawa’s city centre.

  • How long is the flight from Illinois to Ottawa?

    Airlines like Porter Airlines fly from Illinois to Ottawa in about 7h 34m. The time it takes to get you to your destination can typically vary by up to . Illinois and Ottawa are separated by a distance of 1048 km.

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

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

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

    No one likes to see their flight delayed. When booking a flight from Illinois to Ottawa consider choosing GoJet (80%), United Airlines (80%) or Republic Airways (80%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Illinois to Ottawa?

    The cheapest flight price from Illinois to Ottawa is C$ 243. On average you can expect to pay C$ 243. The most popular route, (Chicago O'Hare Intl - Ottawa), can usually be booked for C$ 424.

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Illinois to Ottawa (average of C$ 224). Flying from Illinois to Ottawa in December is currently the most expensive (average of C$ 326). 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

Travelling to a place near Ottawa?

Book flights to Ottawa if you plan to visit one of these locations
Gatineau
Brockville
Smiths Falls
Perth
Prescott
Pembroke
Wakefield

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Illinois to Ottawa?

When you search for this flight from Illinois to Ottawa, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Illinois to Ottawa?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Illinois to Ottawa.

Can Cheapflights find flights from Illinois to Ottawa with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Illinois to Ottawa, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Illinois to Ottawa become cheaper?

Not ready to book yet? You can track prices for flights from Illinois to Ottawa on Cheapflights with our Price Alert feature and get notified when better prices are available.

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