Cheap flights from Chicago to Ottawa from $164

In general, September is the cheapest month to fly from Chicago to Ottawa. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $161. The month of October is another great option to travel to Ottawa, with average flight prices from Chicago averaging around $174.

The cheapest day to depart from Chicago to Ottawa is on a Saturday. Travelers who choose to depart for Ottawa on a Saturday will often find tickets for as low as $449. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to Ottawa on Monday is $891.

In the afternoon is the cheapest time of day to fly from Chicago to Ottawa when you can find flight prices for as low as $546. 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 at noon when prices are $744 on average. Flights to Ottawa from Chicago at noon 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 - Ottawa flight prices

There are 4 cabin classes available to choose from on Chicago 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 39% on your flight if you consider stops on a Chicago to Ottawa flight.

Porter Airlines, American Airlines, and WestJet are the most popular carriers operating from Chicago to Ottawa

Air Canada, United Airlines and American Airlines are the top three most popular airlines that fly to Ottawa from Chicago according to our data. Air Canada is the first choice among our users, with 54% 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 141 minutes.

Generally, flights departing at night tend to experience fewer delays. Flights in the early afternoon 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.

As of July 2026, 12 flights take off from Chicago and land in Ottawa each day. The most common flight departure time for this route is 6:00PM, with 46% of daily flights taking off in the evening.

90 flights are operational weekly from Chicago to Ottawa as of July 2026. The most popular departure day for this route is Mon, with 14% of flights per week taking off on this day.