$106 Cheap Frontier Airlines flights from Philadelphia to San Diego (PHL to SAN)

For info on any present San Diego Intl. Airport (SAN) travel advice and quarantine requirements, go to the Covid-19 Travel Advisor. Check before you arrange your flight, so you don’t get caught up.

If you’re booked with Frontier Airlines from PHL to San Diego Intl. Airport (SAN), you should be able to find out the terminal information when you’re issued with your boarding pass. If not, consult your airline.

As you can’t travel nonstop from PHL to San Diego Intl. Airport (SAN) with Frontier Airlines, make the most of your layover. Shout yourself a few refreshments at a nice airport bar, or go for a wander around the terminal and enjoy a little retail therapy.

As it’ll take around 6 hours and 59 minutes for your Frontier Airlines flight to jet from PHL to SAN, think about packing a couple of travel games in your carry-on bag. You never know — the passenger beside you might welcome a challenge to break up the trip.

If you’re thinking about a jaunt from PHL to SAN, you can select from at least 2 Frontier Airlines flights daily.

For more info about changing your flight to San Diego Intl. Airport (SAN), please visit our Customer Service Portal.

This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.

Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.

Trying to figure out how early you should book your flight? It’s possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.