In general, when booking your flight to San Diego, April is the cheapest month on average.
On average, from most locations, when planning your trip to San Diego, try to book your flight in the region of 60 days in advance for the cheapest prices.
From most locations, the cheapest flights to San Diego are found on a Tuesday. Booking a Sunday departure is usually the most expensive.
Our data shows that the cheapest San Diego flights are usually those with evening departure times. morning flights are often costlier.