In general, when booking your flight to San Diego, February 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 55 days in advance for the cheapest prices.
From most locations, the cheapest day to fly to San Diego is Wednesday. Most users found that departing on a Sunday was most expensive.
In general, when looking for the cheapest flight to San Diego, our data indicates that midday flights are the most cost-effective. afternoon flights tend to be the most expensive.