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Cheap flights from Illinois to Ottawa from C$ 175

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 8/1. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — YOW
11 Jan — 18 Jan1
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 12 December 2025.

Thu 25/129:34 a.m.ORD - YOW
1 stop26h 01mMultiple Airlines
Thu 8/17:00 a.m.YOW - ORD
1 stop14h 30mMultiple Airlines
Deal found 10/12C$ 495
Thu 25/129:34 a.m.ORD - YOW
1 stop26h 01mMultiple Airlines
Fri 9/13:05 p.m.YOW - ORD
2 stops8h 37mMultiple Airlines
Deal found 10/12C$ 536
Thu 25/129:34 a.m.ORD - YOW
1 stop26h 01mMultiple Airlines
Sat 10/18:40 a.m.YOW - ORD
2 stops15h 02mMultiple Airlines
Deal found 10/12C$ 539
Thu 25/129:34 a.m.ORD - YOW
1 stop26h 01mMultiple Airlines
Wed 7/19:30 a.m.YOW - ORD
1 stop10h 32mMultiple Airlines
Deal found 10/12C$ 552
Thu 25/129:34 a.m.ORD - YOW
1 stop26h 01mMultiple Airlines
Sun 11/12:50 p.m.YOW - ORD
2 stops8h 52mMultiple Airlines
Deal found 10/12C$ 565
Tue 30/1212:09 p.m.ORD - YOW
1 stop10h 49mMultiple Airlines
Mon 12/17:00 a.m.YOW - ORD
1 stop29h 22mMultiple Airlines
Deal found 11/12C$ 570
Thu 25/129:34 a.m.ORD - YOW
1 stop26h 01mMultiple Airlines
Thu 1/13:40 p.m.YOW - ORD
2 stops17h 51mMultiple Airlines
Deal found 10/12C$ 593
Tue 30/1212:09 p.m.ORD - YOW
1 stop10h 49mMultiple Airlines
Tue 13/19:30 a.m.YOW - ORD
1 stop9h 22mMultiple Airlines
Deal found 11/12C$ 607
Sun 28/1211:00 a.m.MDW - YOW
1 stop5h 29mMultiple Airlines
Tue 13/13:05 p.m.YOW - MDW
2 stops9h 57mMultiple Airlines
Deal found 11/12C$ 615
Tue 30/127:44 a.m.MDW - YOW
1 stop8h 41mMultiple Airlines
Tue 13/13:05 p.m.YOW - MDW
2 stops9h 57mMultiple Airlines
Deal found 11/12C$ 626
Wed 31/1211:00 a.m.MDW - YOW
1 stop5h 29mPorter Airlines
Mon 5/112:10 p.m.YOW - MDW
1 stop4h 10mPorter Airlines
Deal found 10/12C$ 643
Wed 31/126:12 a.m.MDW - YOW
2 stops40h 46mMultiple Airlines
Mon 5/112:10 p.m.YOW - MDW
1 stop4h 10mMultiple Airlines
Deal found 10/12C$ 655

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 12 December 2025.

Round-trip from

C$ 335

One-way from

C$ 175

Popular in

December

Cheapest in

May

Average price

C$ 887
25/1-1/2
  • 25/1-1/2
  • 4 total stops
  • 38h 32m total
  • Illinois to Ottawa
Search Deals
8/1
  • 8/1
  • 1 total stop
  • 10h 37m total
  • Illinois to Ottawa
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (C$ 184 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 12 December 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

ORD - YOW

ORDYOW

Chicago O'Hare Intl

Sun 25/1

8:43 p.m.-12:42 a.m.

2 stops26h 59m

Ottawa

Sun 1/2

4:20 p.m.-7:38 p.m.

3 stops28h 18m

C$ 346

ChicagoOttawa

ORD - YOW

ORDYOW

Chicago O'Hare Intl

Fri 23/1

7:21 p.m.-2:58 p.m.

1 stop18h 37m

Ottawa

Sun 25/1

2:50 p.m.-10:42 p.m.

2 stops8h 52m

C$ 386

ChicagoOttawa

ORD - YOW

ORDYOW

Chicago O'Hare Intl

Tue 6/1

3:26 p.m.-5:25 p.m.

1 stop24h 59m

Ottawa

Sun 11/1

7:00 a.m.-11:22 a.m.

1 stop29h 22m

C$ 389

ChicagoOttawa

ORD - YOW

ORDYOW

Chicago O'Hare Intl

Thu 8/1

12:48 p.m.-12:25 a.m.

1 stop10h 37m

Ottawa

Thu 15/1

4:35 p.m.-10:42 p.m.

2 stops31h 07m

C$ 448

ChicagoOttawa

ORD - YOW

ORDYOW

Chicago O'Hare Intl

Fri 9/1

7:21 p.m.-2:58 p.m.

1 stop18h 37m

Ottawa

Sun 11/1

12:10 p.m.-10:42 p.m.

2 stops11h 32m

C$ 480

ChicagoOttawa

MDW - YOW

MDWYOW

Chicago Midway

Thu 15/1

6:30 p.m.-5:25 p.m.

1 stop21h 55m

Ottawa

Mon 19/1

9:30 a.m.-10:43 p.m.

2 stops14h 13m

C$ 505

ChicagoOttawa

MDW - YOW

MDWYOW

Chicago Midway

Fri 23/1

1:00 p.m.-11:58 p.m.

1 stop9h 58m

Ottawa

Sun 25/1

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

1 stop10h 40m

C$ 510

ChicagoOttawa

ORD - YOW

ORDYOW

Chicago O'Hare Intl

Thu 25/12

5:25 a.m.-11:58 p.m.

2 stops41h 33m

Ottawa

Thu 8/1

7:00 a.m.-8:30 p.m.

1 stop14h 30m

C$ 520

ChicagoOttawa

ORD - YOW

ORDYOW

Chicago O'Hare Intl

Fri 23/1

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

1 stop9h 20m

Ottawa

Sun 25/1

5:45 p.m.-1:35 p.m.

1 stop20h 50m

C$ 567

ChicagoOttawa

ORD - YOW

ORDYOW

Chicago O'Hare Intl

Thu 15/1

7:20 a.m.-10:29 p.m.

3 stops14h 09m

Ottawa

Sun 18/1

12:10 p.m.-10:42 p.m.

2 stops11h 32m

C$ 578

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/12

Showing 1-10 of 31 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$ 142). Flying from Illinois to Ottawa in July is currently the most expensive (average of C$ 325). 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 12 December 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 12 December 2025.

The most flights from USIL to YOW are scheduled on a Tuesday (13 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (10 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.

  • What are the cheapest airlines to fly from Illinois to Ottawa one-way?

    C$ 169 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$ 236 and C$ 242, 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%), Avianca (93%) or United Airlines (80%) 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$ 142). Flying from Illinois to Ottawa in July is currently the most expensive (average of C$ 325). 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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Alternative routes for Illinois to Ottawa

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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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