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Cheap flights from Illinois to Ottawa from C$ 155

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 17/2. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — YOW
28 Feb — 7 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Illinois to Ottawa

Enter your travel dates to find the best prices.

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 29 January 2026.

Tue 7/49:05 a.m.
ORD
-
YOW
1 stop31h 20m
Multiple Airlines
Wed 15/47:00 a.m.
YOW
-
ORD
1 stop15h 17m
Multiple Airlines
Deal found 27/1C$ 354
Wed 8/47:17 a.m.
ORD
-
YOW
1 stop9h 08m
Multiple Airlines
Wed 15/47:00 a.m.
YOW
-
ORD
1 stop15h 17m
Multiple Airlines
Deal found 27/1C$ 356
Thu 9/412:00 p.m.
ORD
-
YOW
1 stop11h 25m
Multiple Airlines
Wed 15/47:00 a.m.
YOW
-
ORD
1 stop15h 17m
Multiple Airlines
Deal found 27/1C$ 357
Tue 7/49:05 a.m.
ORD
-
YOW
1 stop31h 20m
Multiple Airlines
Tue 14/47:00 a.m.
YOW
-
ORD
1 stop15h 17m
Multiple Airlines
Deal found 27/1C$ 358
Wed 8/47:17 a.m.
ORD
-
YOW
1 stop9h 08m
Multiple Airlines
Tue 14/47:00 a.m.
YOW
-
ORD
1 stop15h 17m
Multiple Airlines
Deal found 27/1C$ 361
Thu 9/412:00 p.m.
ORD
-
YOW
1 stop11h 25m
Multiple Airlines
Tue 14/47:00 a.m.
YOW
-
ORD
1 stop15h 17m
Multiple Airlines
Deal found 27/1C$ 362
Sat 4/412:25 p.m.
ORD
-
YOW
1 stop11h 00m
Multiple Airlines
Wed 8/43:55 p.m.
YOW
-
ORD
1 stop9h 12m
Multiple Airlines
Deal found 26/1C$ 380
Thu 26/211:05 a.m.
MDW
-
YOW
1 stop6h 04m
Porter Airlines
Thu 19/311:00 a.m.
YOW
-
MDW
1 stop5h 20m
Porter Airlines
Deal found 27/1C$ 383
Wed 11/35:22 p.m.
ORD
-
YOW
1 stop20h 36m
Multiple Airlines
Wed 18/33:55 p.m.
YOW
-
ORD
1 stop9h 12m
Multiple Airlines
Deal found 27/1C$ 388
Thu 26/28:16 p.m.
ORD
-
YOW
1 stop20h 09m
Multiple Airlines
Thu 19/34:05 p.m.
YOW
-
ORD
1 stop8h 54m
Multiple Airlines
Deal found 27/1C$ 394
Sat 28/212:50 p.m.
MDW
-
YOW
1 stop10h 49m
Multiple Airlines
Thu 19/35:40 a.m.
YOW
-
MDW
1 stop10h 40m
Multiple Airlines
Deal found 27/1C$ 395
Tue 7/411:00 a.m.
MDW
-
YOW
1 stop12h 39m
Multiple Airlines
Mon 13/45:40 a.m.
YOW
-
MDW
1 stop10h 40m
Multiple Airlines
Deal found 27/1C$ 398

Find flight deals from Illinois to Ottawa

Keep the following information in mind while searching for Illinois to Ottawa flight deals. Data was last updated 29 January 2026.

Round-trip from

C$ 354

One-way from

C$ 155

Popular in

January

Cheapest in

May

Average price

C$ 869
7/4-15/4
  • 7/4-15/4
  • 2 total stops
  • 46h 37m total
  • Illinois to Ottawa
Search Deals
17/2
  • 17/2
  • 1 total stop
  • 23h 42m total
  • Illinois to Ottawa
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (C$ 118 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 29 January 2026.
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

ORD - YOW

ORDYOW

Chicago O'Hare Intl

Thu 9/4

12:00 p.m.-12:25 a.m.

1 stop11h 25m

Ottawa

Wed 15/4

7:00 a.m.-9:17 p.m.

1 stop15h 17m

C$ 357

ChicagoOttawa

ORD - YOW

ORDYOW

Chicago O'Hare Intl

Tue 7/4

9:05 a.m.-5:25 p.m.

1 stop31h 20m

Ottawa

Tue 14/4

7:00 a.m.-9:17 p.m.

1 stop15h 17m

C$ 358

ChicagoOttawa

MDW - YOW

MDWYOW

Chicago Midway

Thu 26/2

11:05 a.m.-6:09 p.m.

1 stop6h 04m

Ottawa

Thu 19/3

11:00 a.m.-3:20 p.m.

1 stop5h 20m

C$ 383

ChicagoOttawa

ORD - YOW

ORDYOW

Chicago O'Hare Intl

Sat 4/4

12:25 p.m.-12:25 a.m.

1 stop11h 00m

Ottawa

Wed 8/4

3:35 p.m.-12:07 a.m.

2 stops9h 32m

C$ 386

ChicagoOttawa

MDW - YOW

MDWYOW

Chicago Midway

Wed 8/4

11:00 a.m.-5:29 p.m.

1 stop5h 29m

Ottawa

Tue 14/4

6:50 a.m.-10:05 a.m.

1 stop4h 15m

C$ 395

ChicagoOttawa

MDW - YOW

MDWYOW

Chicago Midway

Thu 9/4

4:15 p.m.-10:29 p.m.

1 stop5h 14m

Ottawa

Tue 14/4

6:50 a.m.-10:05 a.m.

1 stop4h 15m

C$ 395

ChicagoOttawa

MDW - YOW

MDWYOW

Chicago Midway

Sat 28/2

12:50 p.m.-12:39 a.m.

1 stop10h 49m

Ottawa

Thu 19/3

5:40 a.m.-3:20 p.m.

1 stop10h 40m

C$ 395

ChicagoOttawa

MDW - YOW

MDWYOW

Chicago Midway

Wed 8/4

11:00 a.m.-12:39 a.m.

1 stop12h 39m

Ottawa

Tue 14/4

6:50 a.m.-1:00 p.m.

2 stops7h 10m

C$ 407

ChicagoOttawa

MDW - YOW

MDWYOW

Chicago Midway

Tue 7/4

11:00 a.m.-12:39 a.m.

1 stop12h 39m

Ottawa

Wed 15/4

6:50 a.m.-1:00 p.m.

2 stops7h 10m

C$ 407

ChicagoOttawa

MDW - YOW

MDWYOW

Chicago Midway

Thu 9/4

4:15 p.m.-10:29 p.m.

1 stop5h 14m

Ottawa

Mon 13/4

6:50 a.m.-10:05 a.m.

1 stop4h 15m

C$ 417

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/1

Showing 1-10 of 41 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, April is the cheapest month in which you can book a flight from Illinois to Ottawa (average of C$ 144). Flying from Illinois to Ottawa in January is currently the most expensive (average of C$ 341). 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 29 January 2026.

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 29 January 2026.

The most flights from USIL to YOW are scheduled on a Wednesday (10 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (8 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 6h 04m. 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 cheapest airlines to fly from Illinois to Ottawa one-way?

    C$ 167 is the cheapest one-way deal found within the past few days, from Porter Airlines. You may also be able to find cheap deals on Air Canada and United Airlines, with prices starting from C$ 232 and C$ 238, respectively.

  • 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 SkyWest Airlines (100%), United Airlines (77%) or Air Canada (69%) as they are the most reliable in getting you off to your destination on time.

  • 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, April is the cheapest month in which you can book a flight from Illinois to Ottawa (average of C$ 144). Flying from Illinois to Ottawa in January is currently the most expensive (average of C$ 341). 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
Pembroke
Wakefield

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Alternative routes for Illinois to Ottawa

See prices for flight routes from nearby airports that may be better suited for you.
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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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