Cheap flights from Ottawa to Illinois from C$ 312
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 10/11. 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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Porter Airlines flights from Ottawa to Illinois
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Fly from
Fly to
Route
Depart
Return
OttawaChicago
YOW Ottawa - ORD Chicago O'Hare Intl
YOWORD
Ottawa
Sat 21/11
12:10 p.m.-3:38 p.m.
1 stop4h 28m
Chicago O'Hare Intl
Sun 22/11
1:55 p.m.-7:52 p.m.
1 stop4h 57m
OttawaChicago
YOW Ottawa - ORD Chicago O'Hare Intl
YOWORD
Ottawa
Sat 21/11
9:00 a.m.-5:43 p.m.
2 stops9h 43m
Chicago O'Hare Intl
Sun 22/11
1:55 p.m.-7:52 p.m.
1 stop4h 57m
OttawaChicago
YOW Ottawa - ORD Chicago O'Hare Intl
YOWORD
Ottawa
Sat 14/11
12:40 p.m.-5:40 p.m.
1 stop6h 00m
Chicago O'Hare Intl
Sun 15/11
12:15 p.m.-6:12 p.m.
1 stop4h 57m
OttawaChicago
YOW Ottawa - ORD Chicago O'Hare Intl
YOWORD
Ottawa
Fri 13/11
12:15 p.m.-5:40 p.m.
1 stop6h 25m
Chicago O'Hare Intl
Sun 15/11
12:15 p.m.-6:12 p.m.
1 stop4h 57m
OttawaChicago
YOW Ottawa - ORD Chicago O'Hare Intl
YOWORD
Ottawa
Sun 1/11
8:25 a.m.-11:35 a.m.
1 stop4h 10m
Chicago O'Hare Intl
Sun 22/11
12:15 p.m.-6:12 p.m.
1 stop4h 57m
OttawaChicago
YOW Ottawa - ORD Chicago O'Hare Intl
YOWORD
Ottawa
Tue 8/12
6:00 a.m.-3:30 p.m.
1 stop10h 30m
Chicago O'Hare Intl
Sat 12/12
7:00 a.m.-9:50 p.m.
2 stops13h 50m
OttawaChicago
YOW Ottawa - ORD Chicago O'Hare Intl
YOWORD
Ottawa
Sat 5/12
6:00 a.m.-8:06 p.m.
1 stop15h 06m
Chicago O'Hare Intl
Sat 12/12
9:34 p.m.-1:10 p.m.
2 stops14h 36m
OttawaChicago
YOW Ottawa - ORD Chicago O'Hare Intl
YOWORD
Ottawa
Sat 5/12
6:00 a.m.-6:41 p.m.
2 stops13h 41m
Chicago O'Hare Intl
Sat 12/12
7:00 a.m.-9:50 p.m.
2 stops13h 50m
OttawaChicago
YOW Ottawa - ORD Chicago O'Hare Intl
YOWORD
Ottawa
Thu 12/11
10:50 a.m.-3:02 p.m.
1 stop5h 12m
Chicago O'Hare Intl
Sun 15/11
1:55 p.m.-7:52 p.m.
1 stop4h 57m
OttawaChicago
YOW Ottawa - ORD Chicago O'Hare Intl
YOWORD
Ottawa
Fri 6/11
5:10 a.m.-9:23 a.m.
1 stop5h 13m
Chicago O'Hare Intl
Sun 8/11
1:55 p.m.-7:52 p.m.
1 stop4h 57m
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, March 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$ 579. If you don’t want to visit Illinois in March, then you should wait until February to fly from Ottawa, when ticket prices are also cheap, with an average price of C$ 586.
What is the cheapest day to depart on your flight to Illinois?
According to our data, Wednesday is the cheapest day to fly to Illinois from Ottawa. The lowest ticket price found for a Wednesday departure recently was C$ 787. 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$ 1,010.
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$ 798. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are C$ 871 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 15% 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
Which airlines fly to Illinois?
Air Canada, United Airlines and Porter 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 73% of people opting to fly with this airline when travelling 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.
How many flights depart from Ottawa to Illinois on average per day?
As of October 2026, there are 12 flights per day flying from Ottawa to Illinois. The most common time of day flights depart is 6:00a.m., with 66% of flights taking off at noon.
How many flights depart from Ottawa to Illinois on average per week?
As of October 2026, 84 flights take off from Ottawa and land in Illinois each week. The most common flight departure day for this route is Mon, with 14% of weekly 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
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?
As of October 2026, 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 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?
momondo data reveals that the most frequently booked plane model on the route from Ottawa to Illinois is Embraer 175 (Enhanced Winglets), representing 50.96% of all bookings. The subsequent popular models are Airbus A319 at 22.12%, Embraer 195 E2 at 12.82%, and Airbus A321-100/200 at 2.24%.
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 | ||
|---|---|---|---|---|---|
| PriceFrom C$ 752 | Free Cancellation | Rating 7.4 10,352 reviews | |||
| PriceFrom C$ 842 | Free Cancellation | Rating 7.1 11,764 reviews |
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.