Popular airlines from Allentown to Carlsbad
HK ExpressHK Express
Cathay PacificCathay Pacific
PeachPeach
British AirwaysBritish Airways
AirAsiaAirAsia
Thai AirAsiaThai AirAsia
Hong Kong AirlinesHong Kong Airlines
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Find the cheapest month to fly from Philadelphia (PHL) to San Diego (SAN)
September is typically the cheapest month to fly
From HK$866 - HK$1,965 per traveller.
Graph displaying average flight prices per month
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