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Cheap flights from Ottawa to Illinois from C$ 244

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 19/10. 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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Find the cheapest flights from Ottawa to Illinois

Cheap round-trip flights

WestJet Logo
6:00 a.m. - 4:43 p.m.YOW-ORD
11h 43m1 stop
WestJet Logo
5:30 p.m. - 6:45 a.m.ORD-YOW
12h 15m1 stop
C$ 412WestJet
Find Deal
Sun, 12 Oct - Sun, 19 Oct
Porter Airlines Logo
1:15 p.m. - 4:24 p.m.YOW-MDW
4h 09m1 stop
Porter Airlines Logo
9:35 a.m. - 4:34 p.m.MDW-YOW
5h 59m1 stop
C$ 414Porter Airlines
Find Deal
Sun, 12 Oct - Sun, 19 Oct
WestJet Logo
5:55 a.m. - 4:43 p.m.YOW-ORD
11h 48m2 stops
WestJet Logo
5:30 p.m. - 6:45 a.m.ORD-YOW
12h 15m1 stop
C$ 421WestJet
Find Deal
Sun, 12 Oct - Sun, 19 Oct
Multiple Airlines Logo
6:55 p.m. - 2:35 p.m.YOW-ORD
20h 40m1 stop
Multiple Airlines Logo
7:43 p.m. - 5:25 p.m.ORD-YOW
20h 42m1 stop
C$ 432Multiple Airlines
Find Deal
Sat, 1 Nov - Tue, 4 Nov
Multiple Airlines Logo
11:00 a.m. - 4:24 p.m.YOW-MDW
6h 24m1 stop
Multiple Airlines Logo
9:35 a.m. - 12:22 a.m.MDW-YOW
13h 47m1 stop
C$ 433Multiple Airlines
Find Deal
Tue, 14 Oct - Tue, 21 Oct
Multiple Airlines Logo
3:50 p.m. - 10:50 a.m.YOW-ORD
20h 00m1 stop
Multiple Airlines Logo
12:53 p.m. - 12:22 a.m.ORD-YOW
10h 29m2 stops
C$ 433Multiple Airlines
Find Deal
Sun, 5 Oct - Thu, 9 Oct
Air Canada Logo
6:00 a.m. - 9:51 a.m.YOW-ORD
4h 51m1 stop
Air Canada Logo
8:25 p.m. - 1:34 a.m.ORD-YOW
4h 09m1 stop
C$ 477Air Canada
Find Deal
Sun, 12 Oct - Sun, 19 Oct
United Airlines Logo
5:25 p.m. - 6:54 p.m.YOW-ORD
2h 29mdirect
United Airlines Logo
6:00 a.m. - 11:45 a.m.ORD-YOW
4h 45m1 stop
C$ 481United Airlines
Find Deal
Fri, 3 Oct - Tue, 7 Oct
United Airlines Logo
5:25 p.m. - 6:54 p.m.YOW-ORD
2h 29mdirect
United Airlines Logo
10:41 a.m. - 4:43 p.m.ORD-YOW
5h 02m1 stop
C$ 483United Airlines
Find Deal
Mon, 20 Oct - Sat, 25 Oct
Air Canada Logo
3:55 p.m. - 7:24 p.m.YOW-ORD
4h 29m1 stop
Air Canada Logo
8:25 p.m. - 1:34 a.m.ORD-YOW
4h 09m1 stop
C$ 487Air Canada
Find Deal
Sat, 11 Oct - Tue, 14 Oct

WestJet flights from Ottawa to Illinois

Our best WestJet deals on Ottawa to Illinois flight tickets
WestJet
12 Oct
YOW6:00 a.m.Ottawa
11h 43m
1 stop
ORD4:43 p.m.Chicago O'Hare Intl
19 Oct
ORD5:30 p.m.Chicago O'Hare Intl
12h 15m
1 stop
YOW6:45 a.m.Ottawa
C$ 412
Find similar
WestJet
12 Oct
YOW5:55 a.m.Ottawa
11h 48m
2 stops
ORD4:43 p.m.Chicago O'Hare Intl
19 Oct
ORD5:30 p.m.Chicago O'Hare Intl
12h 15m
1 stop
YOW6:45 a.m.Ottawa
C$ 421
Find similar
WestJet
16 Oct
YOW6:00 a.m.Ottawa
11h 43m
1 stop
ORD4:43 p.m.Chicago O'Hare Intl
19 Oct
ORD5:30 p.m.Chicago O'Hare Intl
21h 49m
2 stops
YOW4:19 p.m.Ottawa
C$ 463
Find similar

Air Canada flights from Ottawa to Illinois

Our best Air Canada deals on Ottawa to Illinois flight tickets
Air Canada
12 Oct
YOW6:00 a.m.Ottawa
4h 51m
1 stop
ORD9:51 a.m.Chicago O'Hare Intl
19 Oct
ORD8:25 p.m.Chicago O'Hare Intl
4h 09m
1 stop
YOW1:34 a.m.Ottawa
C$ 477
Find similar
Air Canada
11 Oct
YOW3:55 p.m.Ottawa
4h 29m
1 stop
ORD7:24 p.m.Chicago O'Hare Intl
14 Oct
ORD8:25 p.m.Chicago O'Hare Intl
4h 09m
1 stop
YOW1:34 a.m.Ottawa
C$ 487
Find similar
Air Canada
12 Oct
YOW6:33 a.m.Ottawa
2h 27m
ORD8:00 a.m.Chicago O'Hare Intl
19 Oct
ORD8:25 p.m.Chicago O'Hare Intl
4h 09m
1 stop
YOW1:34 a.m.Ottawa
C$ 552
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ottawa to Illinois 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, momondo users made 96,600 searches. Data last updated 19 September 2025.
Use the filters below to find and compare flights from Ottawa to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sun 12/10

6:00 a.m.-4:43 p.m.

1 stop11h 43m

Chicago O'Hare Intl

Sun 19/10

5:30 p.m.-6:45 a.m.

1 stop12h 15m

C$ 412

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Sun 12/10

1:15 p.m.-4:24 p.m.

1 stop4h 09m

Chicago Midway

Sun 19/10

9:35 a.m.-4:34 p.m.

1 stop5h 59m

C$ 414

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sun 12/10

5:55 a.m.-4:43 p.m.

2 stops11h 48m

Chicago O'Hare Intl

Sun 19/10

5:30 p.m.-6:45 a.m.

1 stop12h 15m

C$ 421

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sat 1/11

6:55 p.m.-2:35 p.m.

1 stop20h 40m

Chicago O'Hare Intl

Tue 4/11

7:43 p.m.-5:25 p.m.

1 stop20h 42m

C$ 432

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Tue 14/10

11:00 a.m.-4:24 p.m.

1 stop6h 24m

Chicago Midway

Tue 21/10

9:35 a.m.-12:22 a.m.

1 stop13h 47m

C$ 433

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sun 5/10

3:50 p.m.-10:50 a.m.

1 stop20h 00m

Chicago O'Hare Intl

Thu 9/10

12:53 p.m.-12:22 a.m.

2 stops10h 29m

C$ 433

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sun 12/10

6:00 a.m.-9:51 a.m.

1 stop4h 51m

Chicago O'Hare Intl

Sun 19/10

8:25 p.m.-1:34 a.m.

1 stop4h 09m

C$ 477

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 3/10

5:25 p.m.-6:54 p.m.

Nonstop2h 29m

Chicago O'Hare Intl

Tue 7/10

6:00 a.m.-11:45 a.m.

1 stop4h 45m

C$ 481

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Mon 20/10

5:25 p.m.-6:54 p.m.

Nonstop2h 29m

Chicago O'Hare Intl

Sat 25/10

10:41 a.m.-4:43 p.m.

1 stop5h 02m

C$ 483

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sat 11/10

3:55 p.m.-7:24 p.m.

1 stop4h 29m

Chicago O'Hare Intl

Tue 14/10

8:25 p.m.-1:34 a.m.

1 stop4h 09m

C$ 487

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Illinois from

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?

In general, May is the cheapest month to fly from Ottawa to Illinois. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 466. If you don’t want to visit Illinois in May, then you should wait until June to fly from Ottawa, when ticket prices are also cheap, with an average price of C$ 494.

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

According to our data, Friday is the cheapest day to fly to Illinois from Ottawa. The lowest ticket price found for a Friday departure recently was C$ 808. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Illinois is Monday, with ticket prices averaging around C$ 933.

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 at noon. Flights from Ottawa to Illinois during this time can be as low as C$ 505. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are C$ 911 on average. Flights to Illinois from Ottawa in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

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 C$ 712 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 C$ 320 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?

No. A direct flight is the cheapest option for a flight between Ottawa to Illinois.

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

C$ 318

Fastest flight time

2h 08m

Direct flights

Mon, Wed, Thu, Fri, Sat and Sun

Airports in Illinois

1 airport
The best one-way flight to Illinois from Ottawa in the past 72 hours is C$ 318. The best round-trip flight deal from Ottawa to Illinois found on momondo in the last 72 hours is C$ 595.
The fastest flight from Ottawa to Illinois takes 2h 08m
Direct flights go from Ottawa to Illinois on Monday, Wednesday, Thursday, Friday, Saturday and Sunday. There are no airlines offering direct flights.
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?

  • 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 you'll need for your trip to Illinois may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Illinois. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • 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
Airline
Rating
Free Cancellation
Price
Porter AirlinesPriceFrom C$ 370Free CancellationRating
7.9
365 reviews
Search Porter Airlines flights
United AirlinesPriceFrom C$ 464Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
Air CanadaPriceFrom C$ 502Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights

Why use momondo?

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

Finding the right flight to Illinois from Ottawa is quick and easy when you have a range of options in front of you, from reputable agents and recognizable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Illinois quick and easy, saving you time and money.

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

Yes. All flights to Illinois from Ottawa on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Ottawa.

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

Price alerts on flights to Illinois from Ottawa are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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