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Cheap flights from Ottawa to Illinois from C$ 236

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 28/9. 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

Porter Airlines Logo
7:00 a.m. - 9:50 a.m.YOW-MDW
3h 50m1 stop
Porter Airlines Logo
9:35 a.m. - 4:34 p.m.MDW-YOW
5h 59m1 stop
C$ 397Porter Airlines
Find Deal
Mon, 1 Sep - Mon, 8 Sep
WestJet Logo
3:35 p.m. - 12:39 p.m.YOW-ORD
22h 04m2 stops
WestJet Logo
5:30 p.m. - 4:19 p.m.ORD-YOW
21h 49m2 stops
C$ 398WestJet
Find Deal
Fri, 19 Sep - Mon, 22 Sep
United Airlines Logo
6:33 a.m. - 8:00 a.m.YOW-ORD
2h 27mdirect
United Airlines Logo
1:55 p.m. - 5:06 p.m.ORD-YOW
2h 11mdirect
C$ 444United Airlines
Find Deal
Thu, 18 Sep - Thu, 25 Sep
United Airlines Logo
5:25 p.m. - 6:54 p.m.YOW-ORD
2h 29mdirect
United Airlines Logo
6:06 p.m. - 9:35 p.m.ORD-YOW
2h 29mdirect
C$ 445United Airlines
Find Deal
Fri, 5 Sep - Mon, 8 Sep
Air Canada Logo
11:05 a.m. - 2:55 p.m.YOW-ORD
4h 50m1 stop
Air Canada Logo
8:25 p.m. - 1:34 a.m.ORD-YOW
4h 09m1 stop
C$ 469Air Canada
Find Deal
Fri, 19 Sep - Mon, 22 Sep
Logo
5:55 a.m. - 8:39 a.m.YOW-MDW
27h 44m1 stop
Logo
9:35 a.m. - 12:22 a.m.MDW-YOW
13h 47m1 stop
C$ 480
Find Deal
Sat, 4 Oct - Sun, 12 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$ 481Air Canada
Find Deal
Fri, 5 Sep - Sun, 7 Sep
Logo
7:00 a.m. - 9:58 p.m.YOW-ORD
15h 58m2 stops
Logo
5:30 p.m. - 5:21 p.m.ORD-YOW
22h 51m3 stops
C$ 503
Find Deal
Fri, 19 Sep - Mon, 22 Sep
Air Transat Logo
8:40 a.m. - 3:20 p.m.YOW-MDW
7h 40m1 stop
Air Transat Logo
4:15 p.m. - 10:29 p.m.MDW-YOW
5h 14m1 stop
C$ 733Air Transat
Find Deal
Thu, 22 Jan - Mon, 26 Jan
Air Transat Logo
8:40 a.m. - 3:20 p.m.YOW-MDW
7h 40m1 stop
Air Transat Logo
4:15 p.m. - 10:29 p.m.MDW-YOW
5h 14m1 stop
C$ 790Air Transat
Find Deal
Thu, 18 Dec - Mon, 22 Dec

United Airlines flights from Ottawa to Illinois

Our best United Airlines deals on Ottawa to Illinois flight tickets
United Airlines
18 Sep
YOW6:33 a.m.Ottawa
2h 27m
ORD8:00 a.m.Chicago O'Hare Intl
25 Sep
ORD1:55 p.m.Chicago O'Hare Intl
2h 11m
YOW5:06 p.m.Ottawa
C$ 444
Find similar
United Airlines
5 Sep
YOW5:25 p.m.Ottawa
2h 29m
ORD6:54 p.m.Chicago O'Hare Intl
8 Sep
ORD6:06 p.m.Chicago O'Hare Intl
2h 29m
YOW9:35 p.m.Ottawa
C$ 445
Find similar
United Airlines
5 Sep
YOW5:25 p.m.Ottawa
2h 29m
ORD6:54 p.m.Chicago O'Hare Intl
8 Sep
ORD8:50 a.m.Chicago O'Hare Intl
4h 23m
1 stop
YOW2:13 p.m.Ottawa
C$ 459
Find similar

Air Canada flights from Ottawa to Illinois

Our best Air Canada deals on Ottawa to Illinois flight tickets
Air Canada
19 Sep
YOW11:05 a.m.Ottawa
4h 50m
1 stop
ORD2:55 p.m.Chicago O'Hare Intl
22 Sep
ORD8:25 p.m.Chicago O'Hare Intl
4h 09m
1 stop
YOW1:34 a.m.Ottawa
C$ 469
Find similar
Air Canada
5 Sep
YOW6:00 a.m.Ottawa
4h 51m
1 stop
ORD9:51 a.m.Chicago O'Hare Intl
7 Sep
ORD8:25 p.m.Chicago O'Hare Intl
4h 09m
1 stop
YOW1:34 a.m.Ottawa
C$ 481
Find similar
Air Canada
7 Sep
YOW10:00 a.m.Ottawa
4h 14m
1 stop
ORD1:14 p.m.Chicago O'Hare Intl
9 Sep
ORD9:55 a.m.Chicago O'Hare Intl
4h 09m
1 stop
YOW3:04 p.m.Ottawa
C$ 491
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 6 August 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 - MDW

YOWMDW

Ottawa

Mon 1/9

7:00 a.m.-9:50 a.m.

1 stop3h 50m

Chicago Midway

Mon 8/9

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

1 stop5h 59m

C$ 397

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 19/9

3:35 p.m.-12:39 p.m.

2 stops22h 04m

Chicago O'Hare Intl

Mon 22/9

5:30 p.m.-4:19 p.m.

2 stops21h 49m

C$ 398

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Thu 18/9

6:33 a.m.-8:00 a.m.

Nonstop2h 27m

Chicago O'Hare Intl

Thu 25/9

1:55 p.m.-5:06 p.m.

Nonstop2h 11m

C$ 444

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 5/9

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

Nonstop2h 29m

Chicago O'Hare Intl

Mon 8/9

6:06 p.m.-9:35 p.m.

Nonstop2h 29m

C$ 445

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 19/9

11:05 a.m.-2:55 p.m.

1 stop4h 50m

Chicago O'Hare Intl

Mon 22/9

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

1 stop4h 09m

C$ 469

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Sat 4/10

5:55 a.m.-8:39 a.m.

1 stop27h 44m

Chicago Midway

Sun 12/10

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

1 stop13h 47m

C$ 480

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 5/9

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

1 stop4h 51m

Chicago O'Hare Intl

Sun 7/9

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

1 stop4h 09m

C$ 481

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Fri 19/9

7:00 a.m.-9:58 p.m.

2 stops15h 58m

Chicago O'Hare Intl

Mon 22/9

5:30 p.m.-5:21 p.m.

3 stops22h 51m

C$ 503

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Thu 22/1

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

1 stop7h 40m

Chicago Midway

Mon 26/1

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

1 stop5h 14m

C$ 733

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Thu 18/12

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

1 stop7h 40m

Chicago Midway

Mon 22/12

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

1 stop5h 14m

C$ 790

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$ 467. 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$ 493.

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$ 822. 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$ 934.

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$ 920 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$ 701 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?

You could potentially save up to 10% 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$ 236

Fastest flight time

2h 19m

Direct flights

Tue, Wed, Thu, Fri, Sat and Sun

Airports in Illinois

3 airports
The best one-way flight to Illinois from Ottawa in the past 72 hours is C$ 236. The best round-trip flight deal from Ottawa to Illinois found on momondo in the last 72 hours is C$ 397.
The fastest flight from Ottawa to Illinois takes 2h 19m
Direct flights go from Ottawa to Illinois on Tuesday, Wednesday, Thursday, Friday, Saturday and Sunday. Airlines offering direct flights are: United Airlines and Air Canada.
There are 3 airports near Illinois: Chicago O'Hare Intl (ORD), Chicago Midway (MDW), Lambert-St Louis (STL)
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
8.0
322 reviews
Search Porter Airlines flights
United AirlinesPriceFrom C$ 464Free CancellationRating
7.4
8,916 reviews
Search United Airlines flights
Air CanadaPriceFrom C$ 502Free CancellationRating
7.1
9,890 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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