Cheap flights from Ottawa to Illinois from $175
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 8/29. 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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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?
The cheapest month to fly to Illinois from Ottawa is in May. Flight prices, which tend to average around $339, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of May, then flying in April is also cheap. Prices for this month can be found on momondo for an average of $387.
What is the cheapest day to depart on your flight to Illinois?
The cheapest day to depart from Ottawa to Illinois is on a Saturday when prices can be found for as low as $543. Flights from Ottawa to Illinois on a Sunday will generally be more expensive and average around $706. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
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 evening. Flights from Ottawa to Illinois during this time can be as low as $353. Flights in the morning are often more expensive with an average ticket price of $657.
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 12 weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $525 when searching 12 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 $435 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.
What is the cheapest airline that flies from Ottawa to Illinois?
WestJet, Porter Airlines, and APG Airlines are the most popular carriers operating from Ottawa to Illinois
What airlines fly to Illinois?
Air Canada, American Airlines and United 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 65% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 5 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?
12 flights are operational daily from Ottawa to Illinois as of June 2025. The most popular departure time for this route is 6:00AM, with 75% of flights per day taking off at noon.
How many flights depart from Ottawa to Illinois on average per week?
As of June 2025, there are 84 flights per week flying from Ottawa to Illinois. The most common day of the week flights depart is Mon, with 14% of 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
Best Price Found | $175 |
|---|---|
Fastest flight time | 2h 22m |
Direct flights | Mon, Wed, Thu, Fri and Sat |
Airports in Illinois | 3 airports |
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 June 2025, 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 required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
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 34.68% of all bookings. The subsequent popular models are Canadair (Bombardier) Regional Jet CRJ-550 at 33.67%, Embraer 170 at 13.16%, and Embraer 195 E2 at 5.44%.
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 $410 | Free Cancellation | Rating 7.4 8,801 reviews | |||
| PriceFrom $423 | Free Cancellation | Rating 7.1 9,553 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Ottawa to Illinois?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Ottawa to Illinois for you.
Can I find flights from Ottawa to Illinois with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for Ottawa to Illinois flights to just show those with flexible booking policies.
How can momondo help me find flights from Ottawa to Illinois?
momondo provides multiple filters to help you find the best flight to Illinois from Ottawa. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from Ottawa to Illinois right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to Illinois from Ottawa. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.