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Cheap flights from Ottawa to Illinois from C$ 194

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 4/2. 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

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:00 a.m. - 9:03 p.m.
YOW
-
ORD
15h 03m1 stop
Multiple Airlines Logo
7:21 p.m. - 2:58 p.m.
ORD
-
YOW
18h 37m1 stop
C$ 324Multiple Airlines
Wed, 21 Jan - Wed, 28 Jan
Multiple Airlines Logo
7:00 a.m. - 11:22 a.m.
YOW
-
ORD
29h 22m1 stop
Multiple Airlines Logo
2:13 p.m. - 5:15 p.m.
ORD
-
YOW
26h 02m1 stop
C$ 334Multiple Airlines
Sun, 8 Feb - Sun, 15 Feb
Multiple Airlines Logo
9:40 a.m. - 11:16 p.m.
YOW
-
ORD
14h 36m1 stop
Multiple Airlines Logo
4:38 p.m. - 5:15 p.m.
ORD
-
YOW
23h 37m1 stop
C$ 335Multiple Airlines
Thu, 22 Jan - Sun, 8 Feb
Multiple Airlines Logo
3:05 p.m. - 6:29 p.m.
YOW
-
ORD
28h 24m2 stops
Multiple Airlines Logo
7:21 p.m. - 2:58 p.m.
ORD
-
YOW
18h 37m1 stop
C$ 343Multiple Airlines
Wed, 21 Jan - Wed, 28 Jan
United Airlines Logo
6:00 a.m. - 10:41 a.m.
YOW
-
STL
5h 41m1 stop
United Airlines Logo
7:00 a.m. - 4:30 p.m.
STL
-
YOW
8h 30m1 stop
C$ 398United Airlines
Thu, 8 Jan - Wed, 14 Jan
United Airlines Logo
5:55 p.m. - 11:59 p.m.
YOW
-
STL
7h 04m1 stop
United Airlines Logo
6:30 a.m. - 5:12 p.m.
STL
-
YOW
9h 42m1 stop
C$ 403United Airlines
Mon, 19 Jan - Sat, 24 Jan
United Airlines Logo
5:55 p.m. - 11:59 p.m.
YOW
-
STL
7h 04m1 stop
United Airlines Logo
9:57 a.m. - 6:52 p.m.
STL
-
YOW
7h 55m2 stops
C$ 405United Airlines
Thu, 22 Jan - Mon, 26 Jan
United Airlines Logo
9:45 a.m. - 5:43 p.m.
YOW
-
STL
8h 58m2 stops
United Airlines Logo
7:00 a.m. - 1:32 p.m.
STL
-
YOW
5h 32m1 stop
C$ 412United Airlines
Thu, 8 Jan - Wed, 14 Jan
Porter Airlines Logo
8:40 a.m. - 3:20 p.m.
YOW
-
MDW
7h 40m1 stop
Porter Airlines Logo
11:00 a.m. - 5:29 p.m.
MDW
-
YOW
5h 29m1 stop
C$ 488Porter Airlines
Sun, 22 Feb - Thu, 26 Feb
Porter Airlines Logo
6:50 a.m. - 10:05 a.m.
YOW
-
MDW
4h 15m1 stop
Porter Airlines Logo
4:15 p.m. - 10:29 p.m.
MDW
-
YOW
5h 14m1 stop
C$ 563Porter Airlines
Thu, 26 Mar - Sun, 29 Mar

WestJet flights from Ottawa to Illinois

Our best WestJet deals on Ottawa to Illinois flight tickets
WestJet
7 May
YOW3:45 p.m.Ottawa
25h 58m
1 stop
ORD4:43 p.m.Chicago O'Hare Intl
11 May
ORD5:30 p.m.Chicago O'Hare Intl
30h 10m
1 stop
YOW12:40 a.m.Ottawa
C$ 470
Find similar
WestJet
26 Mar
YOW5:40 a.m.Ottawa
13h 14m
2 stops
MDW5:54 p.m.Chicago Midway
29 Mar
MDW10:45 a.m.Chicago Midway
12h 54m
2 stops
YOW12:39 a.m.Ottawa
C$ 598
Find similar
WestJet
7 May
YOW5:55 a.m.Ottawa
13h 36m
2 stops
MDW6:31 p.m.Chicago Midway
11 May
MDW1:05 p.m.Chicago Midway
10h 17m
2 stops
YOW12:22 a.m.Ottawa
C$ 617
Find similar

American Airlines flights from Ottawa to Illinois

Our best American Airlines deals on Ottawa to Illinois flight tickets
American Airlines
19 Jan
YOW10:00 a.m.Ottawa
11h 32m
2 stops
STL8:32 p.m.Lambert-St Louis
24 Jan
STL7:00 a.m.Lambert-St Louis
8h 53m
2 stops
YOW4:53 p.m.Ottawa
C$ 759
Find similar
American Airlines
19 Jan
YOW6:45 a.m.Ottawa
16h 06m
3 stops
STL9:51 p.m.Lambert-St Louis
24 Jan
STL7:00 a.m.Lambert-St Louis
8h 53m
2 stops
YOW4:53 p.m.Ottawa
C$ 781
Find similar
American Airlines
19 Jan
YOW6:45 a.m.Ottawa
16h 06m
3 stops
STL9:51 p.m.Lambert-St Louis
24 Jan
STL7:00 a.m.Lambert-St Louis
8h 53m
2 stops
YOW4:53 p.m.Ottawa
C$ 784
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 26 December 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

Wed 21/1

7:00 a.m.-9:03 p.m.

1 stop15h 03m

Chicago O'Hare Intl

Wed 28/1

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

1 stop18h 37m

C$ 324

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Sun 8/2

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

1 stop29h 22m

Chicago O'Hare Intl

Sun 15/2

2:13 p.m.-5:15 p.m.

1 stop26h 02m

C$ 334

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 22/1

9:40 a.m.-11:16 p.m.

1 stop14h 36m

Chicago O'Hare Intl

Sun 8/2

4:38 p.m.-5:15 p.m.

1 stop23h 37m

C$ 335

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Wed 21/1

3:05 p.m.-6:29 p.m.

2 stops28h 24m

Chicago O'Hare Intl

Wed 28/1

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

1 stop18h 37m

C$ 343

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Thu 8/1

6:00 a.m.-10:41 a.m.

1 stop5h 41m

Lambert-St Louis

Wed 14/1

7:00 a.m.-4:30 p.m.

1 stop8h 30m

C$ 398

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Mon 19/1

5:55 p.m.-11:59 p.m.

1 stop7h 04m

Lambert-St Louis

Sat 24/1

6:30 a.m.-5:12 p.m.

1 stop9h 42m

C$ 403

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Thu 22/1

5:55 p.m.-11:59 p.m.

1 stop7h 04m

Lambert-St Louis

Mon 26/1

9:57 a.m.-6:52 p.m.

2 stops7h 55m

C$ 405

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Thu 8/1

9:45 a.m.-5:43 p.m.

2 stops8h 58m

Lambert-St Louis

Wed 14/1

7:00 a.m.-1:32 p.m.

1 stop5h 32m

C$ 412

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Sun 22/2

8:40 a.m.-3:20 p.m.

1 stop7h 40m

Chicago Midway

Thu 26/2

11:00 a.m.-5:29 p.m.

1 stop5h 29m

C$ 488

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Thu 26/3

6:50 a.m.-10:05 a.m.

1 stop4h 15m

Chicago Midway

Sun 29/3

4:15 p.m.-10:29 p.m.

1 stop5h 14m

C$ 563

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$ 433. 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$ 490.

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

According to our data, Saturday is the cheapest day to fly to Illinois from Ottawa. The lowest ticket price found for a Saturday departure recently was C$ 730. 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 Sunday, with ticket prices averaging around C$ 892.

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$ 501. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are C$ 847 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

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 37% 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

C$ 286

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 C$ 286. The best round-trip flight deal from Ottawa to Illinois found on momondo in the last 72 hours is C$ 539.
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?

  • 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$ 328Free CancellationRating
8.0
401 reviews
Search Porter Airlines flights
United AirlinesPriceFrom C$ 460Free CancellationRating
7.4
9,116 reviews
Search United Airlines flights
Air CanadaPriceFrom C$ 498Free CancellationRating
7.1
10,562 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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