Cheap flights from Ottawa to Chicago from $157
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 Chicago departing on 7/21. 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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United Airlines flights from Ottawa to Chicago
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Air Canada flights from Ottawa to Chicago
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How to get the cheapest flight ticket from Ottawa to Chicago
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 typical price of a round-trip flight between Ottawa and Chicago?
What is the cheapest month to fly to Chicago?
The month of May is, on average, the cheapest month to fly to Chicago from Ottawa, with most prices found around $339. If you’re not able to fly to Chicago in May, then April is your next best option. Flight prices from Ottawa to Chicago during April average around $387.
What is the cheapest day to depart on your flight to Chicago?
The cheapest day to depart on your flight to Chicago is on a Saturday when prices can be found for as low as $532. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Ottawa to Chicago for around $705.
What is the cheapest time of day to depart on your flight to Chicago?
Our most recent data shows that the best time of day to fly to Chicago is in the evening. Flights from Ottawa to Chicago during this time can be as low as $353. In contrast, the most expensive time of day to depart to Chicago is in the morning when prices are around $661.
What is the cheapest Ottawa to Chicago flight route?
Fly from Ottawa to Chicago O'Hare Intl for the best Ottawa - Chicago flight prices
How far in advance should I book a flight to Chicago?
You are more likely to see cheaper flights to Chicago from Ottawa when booking 12 weeks ahead of your departure date. In general, you can expect to find flights to Chicago 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 Chicago from Ottawa for as low as $435 on momondo.
What cabin class options are available on Ottawa to Chicago flights?
There are 4 cabin classes available to choose from on Ottawa to Chicago 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 Chicago flights?
No. A direct flight is the cheapest option for a flight between Ottawa to Chicago.
How have Ottawa to Chicago flight prices changed over time?
As of June 2025, prices for Ottawa to Chicago flights are approximately 31% more expensive when compared to flights at the same time last year.
What is the cheapest airline that flies from Ottawa to Chicago?
Porter Airlines, WestJet, and United Airlines are the most popular carriers operating from Ottawa to Chicago
What airlines fly to Chicago?
Air Canada, American Airlines and United Airlines are the top three most popular airlines that fly to Chicago 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 Chicago. Keep in mind that there are 5 different airlines that fly to Chicago on a routine basis, so you have a few additional options to choose from.
How many flights depart from Ottawa to Chicago on average per day?
As of June 2025, there are 12 flights per day flying from Ottawa to Chicago. The most common time of day flights depart is 6:00AM, with 75% of flights taking off at noon.
How many flights depart from Ottawa to Chicago on average per week?
As of June 2025, 84 flights take off from Ottawa and land in Chicago each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.
When to book flights from Ottawa to Chicago
Cheap Ottawa to Chicago (YOW to CHI) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Ottawa to Chicago
How far is Ottawa to Chicago by plane?
The straight-line distance from Ottawa to Chicago is 643.5 mi. 2h 19m is a normal flight duration for this route.
When did momondo last update prices for flights from Ottawa Airport to Chicago?
Prices for flights from Ottawa Airport to Chicago were last updated today.
How many operators does momondo search for flights from Ottawa Airport to Chicago?
As of June 2025, there are 2 operators available to choose from for flights from Ottawa Airport to Chicago.
How old do you have to be to fly from Ottawa Airport to Chicago?
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 Chicago.
What documentation or ID do you need to fly to Chicago?
The necessary travel and health documents for your Chicago trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Ottawa to Chicago?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Ottawa to Chicago is Embraer 175 (Enhanced Winglets) (34.74% of total bookings). The next most popular plane models are Canadair (Bombardier) Regional Jet CRJ-550 (33.17%), Embraer 170 (14.96%), and Embraer 195 E2 (5.67%).
What is the most popular airline from Ottawa to Chicago?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Ottawa to Chicago is Porter Airlines (48% of total bookings). The next most popular airlines are Air Canada (31%) and United Airlines (21%).
Best airlines flying from Ottawa to Chicago
Compare and see reviews for airlines that fly from Ottawa to Chicago with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $410 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom $423 | Free Cancellation | Rating 7.1 9,537 reviews |
United Airlines Flights From Ottawa to Chicago
The lowest priced United Airlines flight from Ottawa to Chicago from the last 72 hours was $410. Generally, United Airlines has 21 flights on this route every week with an average price of $606. United Airlines is rated 7.4/10 by our users.
Air Canada Flights From Ottawa to Chicago
$423 is the best Air Canada flight deal from Ottawa to Chicago found on momondo over the last 72 hours. The average Air Canada ticket price found was closer to $550, however, with flight time and availability significantly affecting the price. Air Canada (7.1/10 from 9,531 user reviews) flies into Chicago from Ottawa 21 times in an average week so prices can vary.
Traveling to a place near Chicago?
Book flights to Chicago if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Ottawa to Chicago?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ottawa to Chicago. momondo saves you time and could save you money on your trip.
Can I find flights from Ottawa to Chicago with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for Ottawa to Chicago flights to just show those with flexible booking policies.
How can momondo help me find flights from Ottawa to Chicago?
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 Chicago from Ottawa.
I’m not ready to book a flight from Ottawa to Chicago right now. Can momondo alert me if prices change?
If you are not ready to book a flight from Ottawa to Chicago now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Chicago and let you know when they change.