Cheap flights from Ottawa to the United States from $155

In general, January is the cheapest month to fly from Ottawa to United States. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $308. If you aren’t able to travel during the month of January, then book flights to United States from Ottawa during August instead. Flights to United States in August, while not as cheap as those in January, still average around $322.

According to our data, Friday is the cheapest day to fly to United States from Ottawa. The lowest ticket price found for a Friday departure recently was $321. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $490. These prices are subject to change though, so be sure to set up a Price Alert for flights to United States.

The cheapest time of day to fly to United States is in the morning when flights can be purchased for as low as $382. Try not to purchase tickets at noon because they tend to be around $493. Of course, these prices can vary depending on the time of year and what airport you fly to.

Fly from Ottawa to Boston Logan Intl for the best Ottawa - United States flight prices

You could potentially save up to 57% on your flight if you consider stops on a Ottawa to United States flight.

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

Air Canada, Porter Airlines and United Airlines are the top three most popular airlines that fly to United States from Ottawa according to our data. Air Canada is the first choice among our users, with 67% of people opting to fly with this airline when traveling to United States. Keep in mind that there are 7 different airlines that fly to United States on a routine basis, so you have a few additional options to choose from.

Historically, on average around 24% of flights between Ottawa and United States have experienced a delay on any given week. The average delay length over the past 12 months has been 133 minutes.

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

Wednesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Thursday 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 18% of their flights experiencing any sort of delay.

The number of flights available between Ottawa and United States is 36 per day as of May 2026. The most frequent departure time is 2:00PM, with 65% of daily flights leaving in the afternoon.

The number of flights available between Ottawa and United States is 256 per week as of May 2026. The most frequent departure day is Mon, with 15% of weekly flights leaving on this day.