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Cheap flights from Ottawa to Illinois from C$ 269

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 24/9. 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

Enter your travel dates to find the best prices.
United Airlines Logo
2:48 p.m. - 11:37 p.m.
YOW
-
STL
9h 49m
1 stop
United Airlines Logo
7:01 a.m. - 9:56 p.m.
STL
-
YOW
13h 55m
1 stop
C$ 466United Airlines
Fri, 11 Sep - Mon, 14 Sep
United Airlines Logo
3:10 p.m. - 11:44 p.m.
YOW
-
STL
9h 34m
1 stop
United Airlines Logo
6:00 a.m. - 9:35 p.m.
STL
-
YOW
14h 35m
1 stop
C$ 480United Airlines
Thu, 9 Jul - Sat, 11 Jul
United Airlines Logo
6:25 a.m. - 3:46 p.m.
YOW
-
STL
10h 21m
1 stop
United Airlines Logo
6:00 a.m. - 6:48 p.m.
STL
-
YOW
11h 48m
2 stops
C$ 481United Airlines
Thu, 9 Jul - Sat, 11 Jul
Multiple Airlines Logo
6:55 a.m. - 9:35 a.m.
YOW
-
MDW
27h 40m
1 stop
Multiple Airlines Logo
10:15 a.m. - 12:20 a.m.
MDW
-
YOW
13h 05m
1 stop
C$ 533Multiple Airlines
Wed, 10 Jun - Wed, 17 Jun
Multiple Airlines Logo
6:25 p.m. - 9:35 a.m.
YOW
-
MDW
16h 10m
1 stop
Multiple Airlines Logo
10:15 a.m. - 12:20 a.m.
MDW
-
YOW
13h 05m
1 stop
C$ 580Multiple Airlines
Sun, 14 Jun - Tue, 16 Jun
American Airlines Logo
7:00 a.m. - 12:45 p.m.
YOW
-
ORD
6h 45m
1 stop
American Airlines Logo
8:08 a.m. - 2:55 p.m.
ORD
-
YOW
5h 47m
1 stop
C$ 590American Airlines
Wed, 27 May - Fri, 29 May
Delta Logo
6:55 a.m. - 1:05 p.m.
YOW
-
STL
7h 10m
2 stops
Delta Logo
6:30 a.m. - 5:35 p.m.
STL
-
YOW
10h 05m
2 stops
C$ 617Delta
Thu, 9 Jul - Sat, 11 Jul
Porter Airlines Logo
11:00 a.m. - 2:35 p.m.
YOW
-
MDW
4h 35m
1 stop
Porter Airlines Logo
3:20 p.m. - 8:04 p.m.
MDW
-
YOW
3h 44m
1 stop
C$ 625Porter Airlines
Thu, 11 Jun - Mon, 15 Jun
American Airlines Logo
8:40 a.m. - 2:22 p.m.
YOW
-
ORD
6h 42m
1 stop
American Airlines Logo
8:10 a.m. - 2:55 p.m.
ORD
-
YOW
5h 45m
1 stop
C$ 625American Airlines
Wed, 29 Jul - Fri, 31 Jul
Porter Airlines Logo
11:00 a.m. - 9:35 a.m.
YOW
-
MDW
23h 35m
1 stop
Porter Airlines Logo
10:25 a.m. - 5:54 p.m.
MDW
-
YOW
6h 29m
1 stop
C$ 654Porter Airlines
Tue, 16 Jun - Wed, 24 Jun

Air Canada flights from Ottawa to Illinois

Our best Air Canada deals on Ottawa to Illinois flight tickets
Air Canada
13 Jun
YOW9:55 a.m.Ottawa
4h 15m
1 stop
ORD1:10 p.m.Chicago O'Hare Intl
20 Jun
ORD2:00 p.m.Chicago O'Hare Intl
4h 52m
1 stop
YOW7:52 p.m.Ottawa
C$ 786
Air Canada
16 Jun
YOW9:55 a.m.Ottawa
4h 15m
1 stop
ORD1:10 p.m.Chicago O'Hare Intl
24 Jun
ORD7:25 a.m.Chicago O'Hare Intl
4h 52m
1 stop
YOW1:17 p.m.Ottawa
C$ 817
Air Canada
27 May
YOW5:05 a.m.Ottawa
5h 45m
1 stop
ORD9:50 a.m.Chicago O'Hare Intl
1 Jun
ORD2:00 p.m.Chicago O'Hare Intl
4h 51m
1 stop
YOW7:51 p.m.Ottawa
C$ 874

Porter Airlines flights from Ottawa to Illinois

Our best Porter Airlines deals on Ottawa to Illinois flight tickets
Porter Airlines
16 Jun
YOW11:00 a.m.Ottawa
23h 35m
1 stop
MDW9:35 a.m.Chicago Midway
24 Jun
MDW10:25 a.m.Chicago Midway
6h 29m
1 stop
YOW5:54 p.m.Ottawa
C$ 654
Porter Airlines
21 Jun
YOW8:50 p.m.Ottawa
13h 50m
1 stop
MDW9:40 a.m.Chicago Midway
24 Jun
MDW10:25 a.m.Chicago Midway
6h 29m
1 stop
YOW5:54 p.m.Ottawa
C$ 664
Porter Airlines
16 Jun
YOW11:00 a.m.Ottawa
23h 35m
1 stop
MDW9:35 a.m.Chicago Midway
24 Jun
MDW10:25 a.m.Chicago Midway
6h 29m
1 stop
YOW5:54 p.m.Ottawa
C$ 665

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 17 May 2026.
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

Cheapest round-trip

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 11/9

2:48 p.m.-11:37 p.m.

1 stop9h 49m

Lambert-St Louis

Mon 14/9

7:01 a.m.-9:56 p.m.

1 stop13h 55m

C$ 466

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Thu 9/7

3:10 p.m.-11:44 p.m.

1 stop9h 34m

Lambert-St Louis

Sat 11/7

6:00 a.m.-9:35 p.m.

1 stop14h 35m

C$ 480

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Thu 9/7

6:25 a.m.-3:46 p.m.

1 stop10h 21m

Lambert-St Louis

Sat 11/7

6:00 a.m.-6:48 p.m.

2 stops11h 48m

C$ 481

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Wed 10/6

6:55 a.m.-9:35 a.m.

1 stop27h 40m

Chicago Midway

Wed 17/6

10:15 a.m.-12:20 a.m.

1 stop13h 05m

C$ 533

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Sun 14/6

6:25 p.m.-9:35 a.m.

1 stop16h 10m

Chicago Midway

Tue 16/6

10:15 a.m.-12:20 a.m.

1 stop13h 05m

C$ 580

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Wed 27/5

7:00 a.m.-12:45 p.m.

1 stop6h 45m

Chicago O'Hare Intl

Fri 29/5

8:08 a.m.-2:55 p.m.

1 stop5h 47m

C$ 590

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Thu 9/7

6:55 a.m.-1:05 p.m.

2 stops7h 10m

Lambert-St Louis

Sat 11/7

6:30 a.m.-5:35 p.m.

2 stops10h 05m

C$ 617
Quickest round-trip

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Thu 11/6

11:00 a.m.-2:35 p.m.

1 stop4h 35m

Chicago Midway

Mon 15/6

3:20 p.m.-8:04 p.m.

1 stop3h 44m

C$ 625

OttawaChicago

YOW - ORD

YOWORD

Ottawa

Wed 29/7

8:40 a.m.-2:22 p.m.

1 stop6h 42m

Chicago O'Hare Intl

Fri 31/7

8:10 a.m.-2:55 p.m.

1 stop5h 45m

C$ 625

OttawaChicago

YOW - MDW

YOWMDW

Ottawa

Tue 16/6

11:00 a.m.-9:35 a.m.

1 stop23h 35m

Chicago Midway

Wed 24/6

10:25 a.m.-5:54 p.m.

1 stop6h 29m

C$ 654

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, August 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$ 180. If you don’t want to visit Illinois in August, then you should wait until June to fly from Ottawa, when ticket prices are also cheap, with an average price of C$ 271.

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$ 717. 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$ 951.

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 afternoon. Flights from Ottawa to Illinois during this time can be as low as C$ 744. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are C$ 846 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

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$ 342

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$ 342. The best round-trip flight deal from Ottawa to Illinois found on momondo in the last 72 hours is C$ 603.
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

Frequently asked questions about flying from Ottawa to Illinois

  • 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$ 318Free CancellationRating
8.0
439 reviews
Search Porter Airlines flights
Air CanadaPriceFrom C$ 421Free CancellationRating
7.1
11,056 reviews
Search Air Canada flights
United AirlinesPriceFrom C$ 462Free CancellationRating
7.4
9,731 reviews
Search United Airlines 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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