€335 Cheap flights to San Diego

Beaches like Mission Beach are most often visited during August, as the weather is usually above 70 degrees Fahrenheit (21°C) with a low chance of rain.

The cheapest month to fly to San Diego from Ireland is in April. Flight prices, which tend to average around €656, are often lower during this time because this is during the off-season. If you’re not able to fly to San Diego in April, then May is your next best option. Flight prices from Ireland to San Diego during May average around €672.

Finding an alternative and possibly cheaper destination airport near San Diego is possible. If you are planning a flight to San Diego, consider booking flights to San Diego Carlsbad-Palomar Airport (47 km from San Diego city centre), Santa Ana J. Wayne/Orange Cnty Airport (126 km from San Diego city centre), Palm Springs Airport (138 km from San Diego city centre), Long Beach Municipal Airport (153 km from San Diego city centre) or Ontario Airport (155 km from San Diego city centre).

Prices for flights to San Diego Airport are refreshed on a daily basis.

As of March 2026, there are 3 operators available to choose from for flights to San Diego Airport.

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel to San Diego Airport.

The travel and health documents you'll need for your trip to San Diego Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's licence and a passport that is valid for six months after your intended arrival at San Diego Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.