Find cheap Frontier flights to San Diego from $55 - Compare and Save

The cheapest month for Frontier flights to San Diego is February, where tickets cost $104 (return) on average. On the other hand, the most expensive months to fly this route on Frontier are June and March, where the average cost of round-trip tickets is $223 and $185 respectively.

For the absolute cheapest price on Frontier, our data suggests you should book 4 weeks before departure.

The cheapest airline ticket to San Diego from the United States with Frontier in the last 5 days was $55 one-way, and $79 round-trip on the route from San Francisco to San Diego. The most popular route is from San Francisco to San Diego and the cheapest ticket found on this route in the last 5 days was $79 return.

Each week there are around 63 direct flights from within the United States to San Diego. The most common day for departures is Monday, with 16% of flights taking off on this day.

Based on KAYAK data, the cheapest day to fly to San Diego is Saturday where tickets can be as cheap as $151. On the other hand, the most expensive day to fly is Sunday, where prices are $192 on average.

The cheapest time of day to fly to San Diego with Frontier is generally in the morning, when flights cost $147 on average.