Cheap flights from Chicago O'Hare Intl Airport to Ottawa from $131

In general, October is the cheapest month to fly from Chicago O'Hare Intl Airport to Ottawa. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $486. The month of September is another great option to travel to Ottawa, with average flight prices from Chicago O'Hare Intl Airport averaging around $601.

The cheapest day to depart from Chicago O'Hare Intl Airport to Ottawa is on a Saturday. Travelers who choose to depart for Ottawa on a Saturday will often find tickets for as low as $578. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Ottawa on Sunday is $997.

In the afternoon is the cheapest time of day to fly from Chicago O'Hare Intl Airport to Ottawa when you can find flight prices for as low as $661. Flying to Ottawa in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $868 on average. Flights to Ottawa from Chicago O'Hare Intl Airport in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

Fly from Chicago O'Hare Intl to Ottawa for the best Chicago O'Hare Intl - Ottawa flight prices

There are 4 cabin classes available to choose from on Chicago O'Hare Intl Airport to Ottawa flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 37% on your flight if you consider stops on a Chicago O'Hare Intl Airport to Ottawa flight.

Porter Airlines and WestJet are the most popular carriers operating from Chicago O'Hare Intl to Ottawa

Air Canada, United Airlines and American Airlines are the top three most popular airlines that fly to Ottawa from Chicago O'Hare Intl Airport according to our data. Air Canada is the first choice among our users, with 60% of people opting to fly with this airline when traveling to Ottawa. Keep in mind that there are 5 different airlines that fly to Ottawa on a routine basis, so you have a few additional options to choose from.

Historically, on average around 17% of flights between Chicago and Ottawa have experienced a delay on any given week. The average delay length over the past 12 months has been 146 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

Friday is statistically the day of the week which experiences the fewest number of delays on this flight route. Wednesday has historically seen more delays on average compared to the rest of the week.

According to our data, United Airlines have had the least number of delays on this route over the last 12 months; with about 17% of their flights experiencing any sort of delay.

7 flights are operational daily from Chicago O'Hare Intl Airport to Ottawa as of September 2026. The most popular departure time for this route is 6:00PM, with 38% of flights per day taking off in the evening.

The number of flights available between Chicago O'Hare Intl Airport and Ottawa is 52 per week as of September 2026. The most frequent departure day is Tue, with 21% of weekly flights leaving on this day.