Cheap flights from the United States to Ottawa from C$ 138

The month of January is, on average, the cheapest month to fly to Ottawa from United States, with most prices found around C$ 114. If you aren’t able to travel to Ottawa during the month of January, then flying in August is also cheap. Prices for this month can be found on momondo for an average of C$ 659.

Our data shows that Saturday is the least expensive day to fly to Ottawa. Tickets to fly out on this day can be as low as C$ 303. Flights from United States to Ottawa on a Monday will generally be more expensive and average around C$ 441. 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 in the evening. Flights from United States to Ottawa during this time can be as low as C$ 258. At noon is when there is more demand to fly to Ottawa, so prices are often more expensive at around C$ 378 per ticket.

Fly from Las Vegas Harry Reid Intl to Ottawa for the best United States - Ottawa flight prices

You are more likely to see cheaper flights to Ottawa from United States when booking weeks ahead of your departure date. In general, you can expect to find flights to Ottawa for around C$ 441 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ottawa from United States for as low as C$ 355 on momondo.

There is only 1 cabin class available to choose from on United States to Ottawa flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Porter Airlines, United Airlines, and Air Canada are the most popular carriers operating from United States to Ottawa

Air Canada, Porter Airlines and Air Transat are the top three most popular airlines that fly to Ottawa from United States according to our data. Air Canada is the first choice among our users, with 44% of people opting to fly with this airline when travelling to Ottawa. Keep in mind that there are 7 different airlines that fly to Ottawa on a routine basis, so you have a few additional options to choose from.

Historically, on average around 19% of flights between United States and Ottawa have experienced a delay on any given week. The average delay length over the past 12 months has been 144 minutes.

Generally, flights departing in the morning 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. Sunday 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 17% of their flights experiencing any sort of delay.

As of July 2026, there are 36 flights per day flying from United States to Ottawa. The most common time of day flights depart is 3:00p.m., with 48% of flights taking off in the afternoon.

As of July 2026, there are 254 flights per week flying from United States to Ottawa. The most common day of the week flights depart is Mon, with 15% of flights taking off on this day.