In terms of precipitation, rainfall in Ottawa ranges from 50.0 - 93.0 mm per month. June is typically the wettest month, when rainfall can reach 93.0 mm. February is typically the driest time to visit Ottawa when rainfall is around 50.0 mm.

If weather is an important factor for your trip to Ottawa, 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 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -10.0 C).

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 cheapest flights from Illinois to Ottawa?

The cheapest flight price from Illinois to Ottawa is C$ 519. On average you can expect to pay C$ 519. The most popular route, (Chicago O'Hare Intl - Ottawa), can usually be booked for C$ 623.

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 Republic Airways (79%), Air Canada (76%) or Air New Zealand (76%) as they are the most reliable in getting you off to your destination on time.

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.

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.

C$ 272+ Cheap Flights from Illinois to Ottawa

Cheap flight deals from Illinois to Ottawa

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

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 October 2026.

Tue 8/124:00 p.m. -

2 stops21h 32m

Tue 15/128:00 a.m. -

1 stop18h 08m

Deal found 24/10C$ 553

Sun 22/112:52 p.m. -

2 stops24h 45m

Fri 27/1112:15 p.m. -

1 stop6h 25m

Deal found 25/10C$ 584

Sun 22/112:52 p.m. -

2 stops24h 45m

Sat 28/1112:40 p.m. -

1 stop6h 00m

Deal found 25/10C$ 611

Wed 25/114:00 p.m. -

1 stop24h 24m

Wed 2/123:15 p.m. -

2 stops17h 02m

Deal found 26/10C$ 614

Sun 22/116:20 p.m. -

1 stop22h 52m

Fri 27/118:25 a.m. -

1 stop4h 10m

Deal found 25/10C$ 621

Wed 2/123:55 p.m. -

2 stops21h 37m

Tue 8/1212:15 p.m. -

1 stop6h 25m

Deal found 27/10C$ 623

Thu 10/1212:15 p.m. -

1 stop4h 58m

Thu 17/1212:15 p.m. -

1 stop6h 25m

Deal found 26/10C$ 629

Sat 21/116:20 p.m. -

1 stop12h 47m

Fri 27/118:25 a.m. -

1 stop4h 10m

Deal found 25/10C$ 635

Tue 8/1212:15 p.m. -

1 stop4h 58m

Sat 12/1212:40 p.m. -

1 stop6h 00m

Deal found 25/10C$ 637

Tue 1/126:20 p.m. -

1 stop17h 53m

Thu 17/1212:15 p.m. -

1 stop6h 25m

Deal found 27/10C$ 640

Wed 25/118:42 p.m. -

1 stop19h 03m

Wed 2/123:15 p.m. -

2 stops25h 52m

Deal found 26/10C$ 740

Mon 23/118:42 p.m. -

1 stop19h 03m

Mon 30/117:05 a.m. -

2 stops29h 28m

Deal found 26/10C$ 877

Best flights from Illinois to Ottawa
Discover carefully curated flight deals from Illinois to Ottawa that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 29 October 2026.

Tue 8/124:00 p.m. -

2 stops21h 32m

Tue 15/128:00 a.m. -

1 stop18h 08m

Deal found 24/10C$ 553

Mon 16/1112:15 p.m. -

1 stop4h 57m

Tue 17/1112:15 p.m. -

1 stop6h 25m

Deal found 26/10C$ 731

Tue 20/411:48 a.m. -

1 stop5h 10m

Sun 25/47:00 a.m. -

2 stops13h 57m

Deal found 26/10C$ 1,181

Thu 26/1111:56 a.m. -

1 stop9h 00m

Sun 29/116:15 a.m. -

Nonstop2h 45m

Deal found 28/10C$ 1,313

Thu 10/126:21 a.m. -

3 stops14h 45m

Thu 17/1212:15 p.m. -

1 stop6h 25m

Deal found 26/10C$ 755

Fri 20/116:44 p.m. -

2 stops27h 56m

Tue 24/115:30 a.m. -

2 stops29h 16m

Deal found 27/10C$ 1,563

Mon 23/118:42 p.m. -

1 stop19h 03m

Mon 30/117:05 a.m. -

2 stops29h 28m

Deal found 26/10C$ 877

Sat 21/115:26 p.m. -

3 stops17h 06m

Sat 28/1112:40 p.m. -

1 stop6h 00m

Deal found 24/10C$ 898

Tue 8/1210:24 a.m. -

2 stops12h 16m

Tue 15/123:15 p.m. -

2 stops21h 18m

Deal found 24/10C$ 1,082

Mon 7/129:37 a.m. -

2 stops13h 03m

Thu 10/125:30 a.m. -

2 stops13h 31m

Deal found 26/10C$ 1,571

Thu 10/129:37 a.m. -

2 stops13h 03m

Thu 17/125:30 a.m. -

2 stops8h 31m

Deal found 26/10C$ 1,571

Fri 20/111:06 p.m. -

3 stops23h 06m

Tue 24/1110:30 a.m. -

2 stops22h 42m

Deal found 27/10C$ 1,216

Thu 26/1112:05 p.m. -

2 stops34h 35m

Mon 30/115:30 a.m. -

2 stops29h 07m

Deal found 25/10C$ 1,612

Sat 21/112:40 p.m. -

3 stops19h 52m

Sun 29/115:45 p.m. -

2 stops17h 01m

Deal found 24/10C$ 1,227

Sat 21/115:29 p.m. -

2 stops29h 11m

Sat 28/115:30 a.m. -

2 stops29h 16m

Deal found 27/10C$ 1,628

Thu 10/128:37 p.m. -

1 stop19h 08m

Thu 17/128:55 p.m. -

2 stops23h 35m

Deal found 26/10C$ 1,285

Wed 25/1111:56 a.m. -

1 stop9h 00m

Wed 2/126:15 a.m. -

Nonstop2h 45m

Deal found 26/10C$ 1,297

Fri 27/1111:56 a.m. -

1 stop9h 00m

Tue 29/124:42 p.m. -

Nonstop2h 48m

Deal found 28/10C$ 1,324

Sat 21/112:40 p.m. -

3 stops19h 52m

Sat 28/1112:40 p.m. -

3 stops20h 34m

Deal found 24/10C$ 1,482

Find flight deals from Illinois to Ottawa

Round-trip from	C$ 553
One-way from	C$ 216
Popular in	October
Cheapest in	April
Average price	C$ 1,235
Good one-way deal	C$ 519 or less

8/12-15/12
3 total stops
39h 40m total
Illinois to Ottawa

Search Deals

25/1-31/12
2 total stops
19h 58m total
Illinois to Ottawa

Search Deals

High demand for flights, 6% potential price rise

Search Deals

Cheapest flight prices on average. 3% potential price decrease (C$ 40 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in October 2026

Search Deals

Price to beat on a one-way flight from Illinois to Ottawa.

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoOttawa

ORD Chicago O'Hare Intl - YOW Ottawa

ORDYOW

Chicago O'Hare Intl

Thu 10/12

6:20 p.m.-11:33 a.m.

1 stop16h 13m

Ottawa

Wed 31/12

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

Nonstop0h 00m

C$ 285

ChicagoOttawa

ORD Chicago O'Hare Intl - YOW Ottawa

ORDYOW

Chicago O'Hare Intl

Sun 13/12

12:15 p.m.-6:13 p.m.

1 stop4h 58m

Ottawa

Wed 31/12

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

Nonstop0h 00m

C$ 293

ChicagoOttawa

ORD Chicago O'Hare Intl - YOW Ottawa

ORDYOW

Chicago O'Hare Intl

Thu 10/12

8:15 a.m.-5:15 p.m.

3 stops32h 00m

Ottawa

Wed 31/12

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

Nonstop0h 00m

C$ 314

ChicagoOttawa

MDW Chicago Midway - YOW Ottawa

MDWYOW

Chicago Midway

Thu 17/12

6:52 a.m.-11:40 p.m.

3 stops39h 48m

Ottawa

Wed 31/12

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

Nonstop0h 00m

C$ 320

ChicagoOttawa

ORD Chicago O'Hare Intl - YOW Ottawa

ORDYOW

Chicago O'Hare Intl

Thu 10/12

12:15 p.m.-6:13 p.m.

1 stop4h 58m

Ottawa

Wed 31/12

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

Nonstop0h 00m

C$ 321

ChicagoOttawa

MDW Chicago Midway - YOW Ottawa

MDWYOW

Chicago Midway

Thu 10/12

5:02 p.m.-5:15 p.m.

3 stops23h 13m

Ottawa

Wed 31/12

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

Nonstop0h 00m

C$ 331

ChicagoOttawa

ORD Chicago O'Hare Intl - YOW Ottawa

ORDYOW

Chicago O'Hare Intl

Sun 13/12

8:15 a.m.-2:32 p.m.

2 stops29h 17m

Ottawa

Wed 31/12

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

Nonstop0h 00m

C$ 344

ChicagoOttawa

MDW Chicago Midway - YOW Ottawa

MDWYOW

Chicago Midway

Sun 13/12

5:02 p.m.-11:33 a.m.

3 stops17h 31m

Ottawa

Wed 31/12

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

Nonstop0h 00m

C$ 392

ChicagoOttawa

MDW Chicago Midway - YOW Ottawa

MDWYOW

Chicago Midway

Sat 21/11

8:42 p.m.-2:32 p.m.

3 stops40h 50m

Ottawa

Wed 31/12

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

Nonstop0h 00m

C$ 403

ChicagoOttawa

ORD Chicago O'Hare Intl - YOW Ottawa

ORDYOW

Chicago O'Hare Intl

Sun 8/11

11:45 a.m.-5:52 p.m.

1 stop5h 07m

Ottawa

Wed 31/12

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

Nonstop0h 00m

C$ 438

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/10

Showing 1-10 of 40 resultsSorted by cheapest first

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.

ORD-YOW

MDW-YOW

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

USIL-YOW

ORD-YOW

MDW-YOW

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$ 562). Flying from Illinois to Ottawa in October is currently the most expensive (average of C$ 1,235). 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?

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.

Related info for your journey

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 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 Republic Airways (79%), Air Canada (76%) or Air New Zealand (76%) 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$ 519. On average you can expect to pay C$ 519. The most popular route, (Chicago O'Hare Intl - Ottawa), can usually be booked for C$ 623.
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$ 562). Flying from Illinois to Ottawa in October is currently the most expensive (average of C$ 1,235). 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

Gatineau

Prescott

Brockville

Wakefield

Pembroke

Smiths Falls

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Alternative routes for Illinois to Ottawa

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Ontario to Pearson Intl flights

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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.

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Cheap flights from Illinois to Ottawa from C$ 272

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 22/12. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Illinois to Ottawa

Cheapest flights from Illinois to OttawaExplore 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 October 2026.

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 October 2026.

Best flights from Illinois to OttawaDiscover carefully curated flight deals from Illinois to Ottawa that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 29 October 2026.

Discover carefully curated flight deals from Illinois to Ottawa that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 29 October 2026.

Direct flights from Illinois to OttawaExplore direct flight options from Illinois to Ottawa based on user searches, and compare prices and availability for your desired travel dates. Data last updated 29 October 2026.

Explore direct flight options from Illinois to Ottawa based on user searches, and compare prices and availability for your desired travel dates. Data last updated 29 October 2026.

Last-minute flights from Illinois to OttawaDiscover last-minute flight deals from Illinois to Ottawa. Data last updated 29 October 2026 and is based on user searches.

Discover last-minute flight deals from Illinois to Ottawa. Data last updated 29 October 2026 and is based on user searches.

One-way flights from Illinois to OttawaSearch for one-way flight options from Illinois to Ottawa. Find affordable one-way fares based on user searches. Data last updated 29 October 2026.

Search for one-way flight options from Illinois to Ottawa. Find affordable one-way fares based on user searches. Data last updated 29 October 2026.

Find flight deals from Illinois to Ottawa

Round-trip from

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Popular in

Cheapest in

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Use the filters below to find and compare flights from Illinois to Ottawa that are best for you.

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.

Cheapflights Insights

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

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 October 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.

Related info for your journey

What airport do you fly into for flights to Ottawa from Illinois?

What are the most popular routes from Illinois to Ottawa?

What are the most reliable airlines from Illinois to Ottawa?

What are the cheapest flights from Illinois to Ottawa?

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

How can I find direct flights from Illinois to Ottawa?

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

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

Travelling to a place near Ottawa?

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Alternative routes for Illinois to Ottawa

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Complete your trip

Complete your trip to Ottawa by adding a car rental and/or hotel reservation to your travel itinerary.

Direct flights to Ontario

Book a non-stop flight to one of these other cities located in Ontario.

Search flights from Illinois to Ottawa by cabin class

Find flights from Illinois to Ottawa, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Illinois and Ottawa flights

Browse other Illinois and Ottawa flight options. Last updated on 29 October 2026.

Other flights to Ottawa

Explore flights to Ottawa departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 29 October 2026.

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Illinois to Ottawa flights

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

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

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

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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 October 2026.

Best flights from Illinois to Ottawa
Discover carefully curated flight deals from Illinois to Ottawa that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 29 October 2026.

Direct flights from Illinois to Ottawa
Explore direct flight options from Illinois to Ottawa based on user searches, and compare prices and availability for your desired travel dates. Data last updated 29 October 2026.

Last-minute flights from Illinois to Ottawa
Discover last-minute flight deals from Illinois to Ottawa. Data last updated 29 October 2026 and is based on user searches.

One-way flights from Illinois to Ottawa
Search for one-way flight options from Illinois to Ottawa. Find affordable one-way fares based on user searches. Data last updated 29 October 2026.