Cheap flights from Ottawa to San Diego from C$ 239

In general, May is the cheapest month to fly from Ottawa to San Diego. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 440. If you are unable to visit San Diego during the month of May, then departing from Ottawa during the month June is also very affordable. Most momondo users find prices during this month for around C$ 492.

You are more likely to see cheaper flights to San Diego from Ottawa when booking weeks ahead of your departure date. In general, you can expect to find flights to San Diego for around C$ 605 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Diego from Ottawa for as low as C$ 446 on momondo.

You could potentially save up to 2% on your flight if you consider stops on a Ottawa to San Diego flight.

As of February 2026, prices for Ottawa to San Diego flights are approximately 35% more expensive when compared to flights at the same time last year.

United Airlines is the most popular carrier operating from Ottawa to San Diego

Air Canada, United Airlines and American Airlines are the top three most popular airlines that fly to San Diego from Ottawa according to our data. Air Canada is the first choice among our users, with 46% of people opting to fly with this airline when travelling to San Diego. Keep in mind that there are 6 different airlines that fly to San Diego on a routine basis, so you have a few additional options to choose from.

Chicago (ORD) was the most common stop: 50% of momondo users choosing one-stop flights on this route connected there.

Flights via Toronto (YYZ) offer the lowest average round-trip price of C$ 615.

Flights connecting via Chicago (ORD) have the shortest average one-way travel time: 8h 11m.

Chicago (ORD) has the shortest average layover time for this route: 0h 51m.