Philadelphia (PHL) to Los Angeles (LAX): 2,396 miles (3,856 km) great-circle, about 5h 20m nonstop by our estimate. Cheapest fare observed: $301 round-trip on Frontier, with 1 stop, departing June 24, 2026.
$301 round-trip, Frontier F91601, departing 2026-06-24 at 11:06, returning 2026-06-29. The recorded itinerary left on a Wednesday, returning on a Monday 5 nights later; the fare was observed 60 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $301, it ranked 18th of the 30 round-trip fares we recorded from PHL (median $234). That is 12.6 cents per great-circle mile (round-trip price over one-way distance), below the PHL median of 21.3 cents across 30 round-trip routes.
Routes from PHL of similar length: San Diego (2,365 mi) at $196 and Las Vegas (2,171 mi) at $122.
Frontier had the cheapest fare on 19 of 30 PHL routes. It is the 5th longest of the 30 routes we track from PHL.
Of 40 departure airports with a fare to Los Angeles, Philadelphia (PHL) ranked 31st at $301. Lowest: $77 from Seattle (SEA); highest: $1224 from Sapporo (CTS); 11 nonstop. Cheapest-fare airlines (routes): Frontier (18), Spirit (5), Southwest (3), EVA Air (2), Fiji Airways (2) and WestJet (2), plus 8 more.
The reverse, Los Angeles (LAX) to Philadelphia (PHL), was $121 round-trip on Frontier, 1 stop, departing June 1, 2026. Los Angeles to Philadelphia flights.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones America/New_York, America/Los_Angeles; flight time is our estimate.