What airlines fly to Illinois?

Air Canada, United Airlines and American 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 63% 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.

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

Porter Airlines is the most popular carrier operating from Ottawa to Illinois

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

7 flights are operational daily from Ottawa to Illinois as of December 2025. The most popular departure time for this route is 6:00AM, with 62% of flights per day taking off at noon.

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

As of December 2025, there are 53 flights per week flying from Ottawa to Illinois. The most common day of the week flights depart is Tue, with 15% of flights taking off on this day.

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 December 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.

$142 Cheap Flights from Ottawa to Illinois in 2025/26

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Find the cheapest flights from Ottawa to Illinois

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Cheap round-trip flights

Enter your travel dates to find the best prices.

7:00 am - 9:03 pm

YOW

ORD

15h 03m1 stop

7:21 pm - 2:58 pm

ORD

YOW

18h 37m1 stop

$237Multiple Airlines

Wed, Jan 21 - Wed, Jan 28

7:00 am - 10:36 pm

YOW

ORD

16h 36m1 stop

2:52 pm - 12:25 am

ORD

YOW

8h 33m1 stop

$244Multiple Airlines

Thu, Jan 22 - Thu, Jan 29

9:40 am - 11:16 pm

YOW

ORD

14h 36m1 stop

4:38 pm - 5:15 pm

ORD

YOW

23h 37m1 stop

$245Multiple Airlines

Thu, Jan 22 - Sun, Feb 8

3:05 pm - 6:29 pm

YOW

ORD

28h 24m2 stops

7:21 pm - 2:58 pm

ORD

YOW

18h 37m1 stop

$251Multiple Airlines

Wed, Jan 21 - Wed, Jan 28

6:00 am - 10:41 am

YOW

STL

5h 41m1 stop

7:00 am - 4:30 pm

STL

YOW

8h 30m1 stop

$291United Airlines

Thu, Jan 8 - Wed, Jan 14

5:55 pm - 11:59 pm

YOW

STL

7h 04m1 stop

6:30 am - 5:12 pm

STL

YOW

9h 42m1 stop

$295United Airlines

Mon, Jan 19 - Sat, Jan 24

2:15 pm - 10:58 pm

YOW

STL

9h 43m2 stops

9:57 am - 9:56 pm

STL

YOW

10h 59m2 stops

$349Air Canada

Thu, Jan 22 - Mon, Jan 26

8:40 am - 3:20 pm

YOW

MDW

7h 40m1 stop

11:00 am - 5:29 pm

MDW

YOW

5h 29m1 stop

$357Porter Airlines

Sun, Feb 22 - Thu, Feb 26

5:40 am - 4:37 pm

YOW

STL

11h 57m2 stops

10:19 am - 12:42 am

STL

YOW

13h 23m2 stops

$548Delta

Mon, Jan 19 - Sat, Jan 24

5:40 am - 4:37 pm

YOW

STL

11h 57m2 stops

10:19 am - 12:42 am

STL

YOW

13h 23m2 stops

$550Delta

Mon, Jan 19 - Sat, Jan 24

WestJet flights from Ottawa to Illinois

Our best WestJet deals on Ottawa to Illinois flight tickets

WestJet

May 7

YOW3:45 pmOttawa

25h 58m

1 stop

ORD4:43 pmChicago O'Hare Intl

May 11

ORD5:30 pmChicago O'Hare Intl

30h 10m

1 stop

YOW12:40 amOttawa

$344

Find similar

WestJet

Mar 26

YOW5:40 amOttawa

13h 14m

2 stops

MDW5:54 pmChicago Midway

Mar 29

MDW10:45 amChicago Midway

12h 54m

2 stops

YOW12:39 amOttawa

$437

Find similar

WestJet

May 7

YOW5:55 amOttawa

13h 36m

2 stops

MDW6:31 pmChicago Midway

May 11

MDW1:05 pmChicago Midway

10h 17m

2 stops

YOW12:22 amOttawa

$451

Find similar

United Airlines flights from Ottawa to Illinois

Our best United Airlines deals on Ottawa to Illinois flight tickets

United Airlines

Jan 8

YOW6:00 amOttawa

5h 41m

1 stop

STL10:41 amLambert-St Louis

Jan 14

STL7:00 amLambert-St Louis

8h 30m

1 stop

YOW4:30 pmOttawa

$291

Find similar

United Airlines

Jan 19

YOW5:55 pmOttawa

7h 04m

1 stop

STL11:59 pmLambert-St Louis

Jan 24

STL6:30 amLambert-St Louis

9h 42m

1 stop

YOW5:12 pmOttawa

$295

Find similar

United Airlines

Jan 22

YOW5:55 pmOttawa

7h 04m

1 stop

STL11:59 pmLambert-St Louis

Jan 26

STL8:30 amLambert-St Louis

14h 24m

1 stop

YOW11:54 pmOttawa

$296

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Wed 1/21

7:00 am-9:03 pm

1 stop15h 03m

Chicago O'Hare Intl

Wed 1/28

7:21 pm-2:58 pm

1 stop18h 37m

$237

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 1/22

7:00 am-10:36 pm

1 stop16h 36m

Chicago O'Hare Intl

Thu 1/29

2:52 pm-12:25 am

1 stop8h 33m

$244

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 1/22

9:40 am-11:16 pm

1 stop14h 36m

Chicago O'Hare Intl

Sun 2/8

4:38 pm-5:15 pm

1 stop23h 37m

$245

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Wed 1/21

3:05 pm-6:29 pm

2 stops28h 24m

Chicago O'Hare Intl

Wed 1/28

7:21 pm-2:58 pm

1 stop18h 37m

$251

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Thu 1/8

6:00 am-10:41 am

1 stop5h 41m

Lambert-St Louis

Wed 1/14

7:00 am-4:30 pm

1 stop8h 30m

$291

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Mon 1/19

5:55 pm-11:59 pm

1 stop7h 04m

Lambert-St Louis

Sat 1/24

6:30 am-5:12 pm

1 stop9h 42m

$295

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Thu 1/22

2:15 pm-10:58 pm

2 stops9h 43m

Lambert-St Louis

Mon 1/26

9:57 am-9:56 pm

2 stops10h 59m

$349

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Sun 2/22

8:40 am-3:20 pm

1 stop7h 40m

Chicago Midway

Thu 2/26

11:00 am-5:29 pm

1 stop5h 29m

$357

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Mon 1/19

5:40 am-4:37 pm

2 stops11h 57m

Lambert-St Louis

Sat 1/24

10:19 am-12:42 am

2 stops13h 23m

$548

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Mon 1/19

5:40 am-4:37 pm

2 stops11h 57m

Lambert-St Louis

Sat 1/24

10:19 am-12:42 am

2 stops13h 23m

$550

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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 $317, 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 $479. Flights from Ottawa to Illinois on a Monday will generally be more expensive and average around $666. 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 $629.

What is the cheapest Ottawa to Illinois flight route?

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

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 2% 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	$326
Fastest flight time	2h 08m
Direct flights	Every day
Airports in Illinois	98 airports

The best one-way flight to Illinois from Ottawa in the past 72 hours is $326. The best round-trip flight deal from Ottawa to Illinois found on momondo in the last 72 hours is $495.

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

Direct flights go from Ottawa to Illinois every day.

There are 98 airports in Illinois. From Ottawa there are direct flights to 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 December 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 45.59% of all bookings. The subsequent popular models are Embraer 195 E2 at 18.75%, Canadair (Bombardier) Regional Jet CRJ-550 at 9.56%, and Boeing 777-300ER at 5.51%.

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
Air Canada	PriceFrom $306	Free Cancellation	Rating 7.1 10,561 reviews		Search Air Canada flights
United Airlines	PriceFrom $324	Free Cancellation	Rating 7.4 9,115 reviews		Search United Airlines 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

Flights to New Yorkfrom $50

Flights to Los Angelesfrom $47

Flights to Miamifrom $50

Flights to Chicagofrom $51

Flights to Orlandofrom $49

Flights to San Franciscofrom $59

Flights to Las Vegasfrom $49

Flights to Washington, D.C.from $58

Flights to Bostonfrom $51

Flights to Atlantafrom $44

Flights to Dallasfrom $51

Flights to Seattlefrom $57

Cheap flights from Ottawa to Illinois from $142

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 2/4. 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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Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

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Find the cheapest flights from Ottawa to Illinois

Cheap round-trip flights

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

See travel insights to Illinois from

How to get the cheapest flight ticket from Ottawa to Illinois

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 $629.

What is the cheapest Ottawa to Illinois flight route?

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

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 2% on your flight if you consider stops on a Ottawa to Illinois flight.

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

Porter Airlines is the most popular carrier operating from Ottawa to Illinois

What airlines fly to Illinois?

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

7 flights are operational daily from Ottawa to Illinois as of December 2025. The most popular departure time for this route is 6:00AM, with 62% of flights per day taking off at noon.

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

As of December 2025, there are 53 flights per week flying from Ottawa to Illinois. The most common day of the week flights depart is Tue, with 15% 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