Cheap flights from Ottawa to the United States from C$ 169

The month of July is, on average, the cheapest month to fly to United States from Ottawa, with most prices found around C$ 353. If you don’t want to visit United States in July, then you should wait until September to fly from Ottawa, when ticket prices are also cheap, with an average price of C$ 356.

On average, the least expensive day to fly to United States from Ottawa is on a Monday. momondo users have found tickets for Monday departures for as low as C$ 355. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to United States on Saturday is C$ 431.

Our most recent data shows that the best time of day to fly to United States is at noon. Flights from Ottawa to United States during this time can be as low as C$ 255. Flights to United States are more costly in the morning, with an average ticket price of C$ 402. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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

You are more likely to see cheaper flights to United States from Ottawa when booking weeks ahead of your departure date. In general, you can expect to find flights to United States for around C$ 391 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United States from Ottawa for as low as C$ 324 on momondo.

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

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

Air Canada, Porter Airlines and WestJet 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 54% of people opting to fly with this airline when travelling to United States. Keep in mind that there are 8 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 23% 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 135 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.

Wednesday 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 18% of their flights experiencing any sort of delay.

As of April 2026, 37 flights take off from Ottawa and land in United States each day. The most common flight departure time for this route is 3:00p.m., with 64% of daily flights taking off in the afternoon.

As of April 2026, there are 261 flights per week flying from Ottawa to United States. The most common day of the week flights depart is Fri, with 16% of flights taking off on this day.