Cheap flights from Chicago to Ottawa from C$ 165

The month of May is, on average, the cheapest month to fly to Ottawa from Chicago, with most prices found around C$ 463. If you aren’t able to travel to Ottawa during the month of May, then flying in September is also cheap. Prices for this month can be found on momondo for an average of C$ 547.

Our data shows that Friday is the least expensive day to fly to Ottawa. Tickets to fly out on this day can be as low as C$ 664. Flights from Chicago to Ottawa on a Sunday will generally be more expensive and average around C$ 870. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Our most recent data shows that the best time of day to fly to Ottawa is at noon. Flights from Chicago to Ottawa during this time can be as low as C$ 666. In the morning is when there is more demand to fly to Ottawa, so prices are often more expensive at around C$ 694 per ticket.

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

There are 2 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 47% on your flight if you consider stops on a Chicago to Ottawa flight.

Historically, on average around 13% 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 in the evening tend to experience fewer delays. Flights departing at night have, in the past, seen delays more frequently in comparison.

Friday is statistically the day of the week that experiences the fewest 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 has had the least delays on this route over the last 12 months, with about 13% of their flights experiencing any sort of delay.

As of March 2026, there are 11 flights per day flying from Chicago to Ottawa. The most common time of day flights depart is 6:00p.m., with 41% of flights taking off in the evening.

As of March 2026, 80 flights take off from Chicago and land in Ottawa each week. The most common flight departure day for this route is Mon, with 15% of weekly flights taking off on this day.