How many flights depart from Ottawa to Illinois on average per day?

12 flights are operational daily from Ottawa to Illinois as of November 2025. The most popular departure time for this route is 11:00AM, with 73% of flights per day taking off at noon.

How many flights depart from Ottawa to Illinois on average per week?

As of November 2025, there are 84 flights per week flying from Ottawa to Illinois. The most common day of the week flights depart is Mon, with 14% of flights taking off on this day.

What is the cheapest airline that flies from Ottawa to Illinois?

United Airlines, Air Canada, and Porter Airlines are the most popular carriers operating from Ottawa to Illinois

What airlines fly to Illinois?

Air Canada, United Airlines and Porter Airlines are the top three most popular airlines that fly to Illinois from Ottawa according to our data. Air Canada is the first choice among our users, with 67% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 4 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Ottawa Airport to Illinois?

Prices for flights from Ottawa Airport to Illinois were last updated today.

How many operators does momondo search for flights from Ottawa Airport to Illinois?

As of November 2025, there are 2 operators available to choose from for flights from Ottawa Airport to Illinois.

How old do you have to be to fly from Ottawa Airport to Illinois?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ottawa Airport to Illinois.

What documentation or ID do you need to fly to Illinois?

The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$133 Cheap Flights from Ottawa to Illinois in 2025/26

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Cheap round-trip flights

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7:00 am - 12:16 amYOW-ORD

18h 16m3 stops

12:44 pm - 11:58 pmORD-YOW

10h 14m1 stop

$238Multiple Airlines

Find Deal

Wed, Jan 7 - Mon, Jan 12

9:30 am - 10:37 pmYOW-STL

14h 07m1 stop

5:11 pm - 5:13 pmSTL-YOW

23h 02m1 stop

$257Multiple Airlines

Find Deal

Fri, Jan 16 - Sun, Jan 25

5:55 pm - 11:59 pmYOW-STL

7h 04m1 stop

8:05 am - 5:12 pmSTL-YOW

8h 07m1 stop

$300United Airlines

Find Deal

Fri, Jan 23 - Sun, Jan 25

2:50 pm - 10:58 pmYOW-STL

9h 08m2 stops

6:30 am - 5:42 pmSTL-YOW

10h 12m2 stops

$352Air Canada

Find Deal

Fri, Jan 23 - Sun, Jan 25

2:50 pm - 10:58 pmYOW-STL

9h 08m2 stops

6:30 am - 5:42 pmSTL-YOW

10h 12m2 stops

$353Air Canada

Find Deal

Fri, Jan 23 - Sun, Jan 25

6:00 am - 12:29 pmYOW-STL

7h 29m2 stops

6:30 am - 2:30 pmSTL-YOW

7h 00m2 stops

$359United Airlines

Find Deal

Fri, Jan 16 - Sun, Jan 25

8:40 am - 3:20 pmYOW-MDW

7h 40m1 stop

11:00 am - 5:29 pmMDW-YOW

5h 29m1 stop

$398Porter Airlines

Find Deal

Fri, Dec 5 - Mon, Dec 8

8:40 am - 11:50 amYOW-MDW

4h 10m1 stop

11:00 am - 7:54 pmMDW-YOW

7h 54m1 stop

$426Porter Airlines

Find Deal

Sat, Dec 6 - Mon, Dec 8

5:40 am - 1:10 pmYOW-MDW

32h 30m2 stops

10:49 am - 12:42 amMDW-YOW

12h 53m2 stops

$454WestJet

Find Deal

Sat, Dec 6 - Mon, Dec 8

5:40 am - 9:54 amYOW-MDW

29h 14m2 stops

10:49 am - 12:42 amMDW-YOW

12h 53m2 stops

$468WestJet

Find Deal

Tue, Dec 2 - Sun, Dec 7

WestJet flights from Ottawa to Illinois

Our best WestJet deals on Ottawa to Illinois flight tickets

WestJet

Dec 6

YOW5:40 amOttawa

32h 30m

2 stops

MDW1:10 pmChicago Midway

Dec 8

MDW10:49 amChicago Midway

12h 53m

2 stops

YOW12:42 amOttawa

$454

Find similar

WestJet

Dec 2

YOW5:40 amOttawa

29h 14m

2 stops

MDW9:54 amChicago Midway

Dec 7

MDW10:49 amChicago Midway

12h 53m

2 stops

YOW12:42 amOttawa

$468

Find similar

WestJet

Dec 2

YOW5:40 amOttawa

29h 14m

2 stops

MDW9:54 amChicago Midway

Dec 7

MDW10:49 amChicago Midway

12h 53m

2 stops

YOW12:42 amOttawa

$469

Find similar

United Airlines flights from Ottawa to Illinois

Our best United Airlines deals on Ottawa to Illinois flight tickets

United Airlines

Jan 23

YOW5:55 pmOttawa

7h 04m

1 stop

STL11:59 pmLambert-St Louis

Jan 25

STL8:05 amLambert-St Louis

8h 07m

1 stop

YOW5:12 pmOttawa

$300

Find similar

United Airlines

Jan 16

YOW6:00 amOttawa

7h 29m

2 stops

STL12:29 pmLambert-St Louis

Jan 25

STL6:30 amLambert-St Louis

7h 00m

2 stops

YOW2:30 pmOttawa

$359

Find similar

United Airlines

Dec 20

YOW5:09 pmOttawa

5h 34m

1 stop

STL9:43 pmLambert-St Louis

Jan 5

STL8:15 amLambert-St Louis

14h 39m

1 stop

YOW11:54 pmOttawa

$461

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Wed 1/7

7:00 am-12:16 am

3 stops18h 16m

Chicago O'Hare Intl

Mon 1/12

12:44 pm-11:58 pm

1 stop10h 14m

$238

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 1/16

9:30 am-10:37 pm

1 stop14h 07m

Lambert-St Louis

Sun 1/25

5:11 pm-5:13 pm

1 stop23h 02m

$257

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 1/23

5:55 pm-11:59 pm

1 stop7h 04m

Lambert-St Louis

Sun 1/25

8:05 am-5:12 pm

1 stop8h 07m

$300

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 1/23

2:50 pm-10:58 pm

2 stops9h 08m

Lambert-St Louis

Sun 1/25

6:30 am-5:42 pm

2 stops10h 12m

$352

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 1/23

2:50 pm-10:58 pm

2 stops9h 08m

Lambert-St Louis

Sun 1/25

6:30 am-5:42 pm

2 stops10h 12m

$353

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 1/16

6:00 am-12:29 pm

2 stops7h 29m

Lambert-St Louis

Sun 1/25

6:30 am-2:30 pm

2 stops7h 00m

$359

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Fri 12/5

8:40 am-3:20 pm

1 stop7h 40m

Chicago Midway

Mon 12/8

11:00 am-5:29 pm

1 stop5h 29m

$398

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Sat 12/6

8:40 am-11:50 am

1 stop4h 10m

Chicago Midway

Mon 12/8

11:00 am-7:54 pm

1 stop7h 54m

$426

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Sat 12/6

5:40 am-1:10 pm

2 stops32h 30m

Chicago Midway

Mon 12/8

10:49 am-12:42 am

2 stops12h 53m

$454

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Tue 12/2

5:40 am-9:54 am

2 stops29h 14m

Chicago Midway

Sun 12/7

10:49 am-12:42 am

2 stops12h 53m

$468

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How to get the cheapest flight ticket from Ottawa to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Ottawa is in May. Flight prices, which tend to average around $339, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of May, then flying in June is also cheap. Prices for this month can be found on momondo for an average of $358.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Ottawa to Illinois is on a Saturday when prices can be found for as low as $472. Flights from Ottawa to Illinois on a Thursday will generally be more expensive and average around $670. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from Ottawa to Illinois during this time can be as low as $353. Flights in the morning are often more expensive with an average ticket price of $649.

What is the cheapest Ottawa to Illinois flight route?

Fly from Ottawa to Chicago O'Hare Intl for the best Ottawa - Illinois flight prices

How far in advance should I book a flight to Illinois?

You are more likely to see cheaper flights to Illinois from Ottawa when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $521 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Ottawa for as low as $355 on momondo.

What cabin class options are available on Ottawa to Illinois flights?

There are 4 cabin classes available to choose from on Ottawa to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Ottawa to Illinois flights?

You could potentially save up to 51% on your flight if you consider stops on a Ottawa to Illinois flight.

Cheap Ottawa to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ottawa to Illinois

Best Price Found	$240
Fastest flight time	2h 08m
Direct flights	Every day
Airports in Illinois	1 airport

The best one-way flight to Illinois from Ottawa in the past 72 hours is $240. The best round-trip flight deal from Ottawa to Illinois found on momondo in the last 72 hours is $407.

The fastest flight from Ottawa to Illinois takes 2h 08m

Direct flights go from Ottawa to Illinois every day.

There is 1 airport near Illinois: Chicago O'Hare Intl (ORD)

Search flight deals

When did momondo last update prices for flights from Ottawa Airport to Illinois?
Prices for flights from Ottawa Airport to Illinois were last updated today.
How many operators does momondo search for flights from Ottawa Airport to Illinois?
As of November 2025, there are 2 operators available to choose from for flights from Ottawa Airport to Illinois.
How old do you have to be to fly from Ottawa Airport to Illinois?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ottawa Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Ottawa to Illinois?
momondo data reveals that the most frequently booked plane model on the route from Ottawa to Illinois is Embraer 175 (Enhanced Winglets), representing 43.62% of all bookings. The subsequent popular models are Canadair (Bombardier) Regional Jet CRJ-550 at 27.84%, Embraer 195 E2 at 12.99%, and Boeing 777-300ER at 3.48%.

Best airlines flying from Ottawa to Illinois

Compare and see reviews for airlines that fly from Ottawa to Illinois with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $324	Free Cancellation	Rating 7.4 9,002 reviews		Search United Airlines flights
Air Canada	PriceFrom $326	Free Cancellation	Rating 7.1 10,409 reviews		Search Air Canada flights

Why use momondo?

Why should I use momondo to find a flight deal from Ottawa to Illinois?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Ottawa to Illinois for you.

Can I find flights from Ottawa to Illinois with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Ottawa to Illinois flights to just show those with flexible booking policies.

How can momondo help me find flights from Ottawa to Illinois?

momondo provides multiple filters to help you find the best flight to Illinois from Ottawa. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Ottawa to Illinois right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Illinois from Ottawa. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Find better results for your trip to Illinois

Popular cities in Illinois

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Flights to Washington, D.C.from $49

Flights to Bostonfrom $49

Flights to Atlantafrom $40

Flights to Dallasfrom $59

Flights to Seattlefrom $58

Cheap flights from Ottawa to Illinois from $133

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ottawa to Illinois departing on 12/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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WestJet flights from Ottawa to Illinois

Our best WestJet deals on Ottawa to Illinois flight tickets

United Airlines flights from Ottawa to Illinois

Our best United Airlines deals on Ottawa to Illinois flight tickets

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How to get the cheapest flight ticket from Ottawa to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Illinois?

What is the cheapest day to depart on your flight to Illinois?

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the evening. Flights from Ottawa to Illinois during this time can be as low as $353. Flights in the morning are often more expensive with an average ticket price of $649.

What is the cheapest Ottawa to Illinois flight route?

Fly from Ottawa to Chicago O'Hare Intl for the best Ottawa - Illinois flight prices

How far in advance should I book a flight to Illinois?

What cabin class options are available on Ottawa to Illinois flights?

There are 4 cabin classes available to choose from on Ottawa to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Ottawa to Illinois flights?

You could potentially save up to 51% on your flight if you consider stops on a Ottawa to Illinois flight.

What is the cheapest airline that flies from Ottawa to Illinois?

United Airlines, Air Canada, and Porter Airlines are the most popular carriers operating from Ottawa to Illinois

What airlines fly to Illinois?

How many flights depart from Ottawa to Illinois on average per day?

12 flights are operational daily from Ottawa to Illinois as of November 2025. The most popular departure time for this route is 11:00AM, with 73% of flights per day taking off at noon.

How many flights depart from Ottawa to Illinois on average per week?

As of November 2025, there are 84 flights per week flying from Ottawa to Illinois. The most common day of the week flights depart is Mon, with 14% of flights taking off on this day.

Cheap Ottawa to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ottawa to Illinois

Best Price Found

Fastest flight time

Direct flights

Airports in Illinois

When did momondo last update prices for flights from Ottawa Airport to Illinois?

How many operators does momondo search for flights from Ottawa Airport to Illinois?

How old do you have to be to fly from Ottawa Airport to Illinois?

What documentation or ID do you need to fly to Illinois?

What is the most popular plane model from Ottawa to Illinois?

Best airlines flying from Ottawa to Illinois

Compare and see reviews for airlines that fly from Ottawa to Illinois with momondo

Why use momondo?

Why should I use momondo to find a flight deal from Ottawa to Illinois?

Can I find flights from Ottawa to Illinois with flexible booking policies on momondo?

How can momondo help me find flights from Ottawa to Illinois?

I’m not ready to book a flight from Ottawa to Illinois right now. Can momondo alert me if prices change?

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Illinois

Popular cities in Illinois

Popular flights according to clicks in the last 7 days on momondo