Philippine Airlines often has strong connectivity into Manila from U.S. West Coast hubs (LAX) with full-service offerings on long-haul legs, while U.S. carriers (United, Delta) provide solid alliance connections via SFO/LAX/SEA and partner airlines for the Pacific hop. Asian carriers such as ANA, Japan Airlines, Korean Air and Cathay Pacific can provide high service standards and additional hub options (Tokyo, Seoul, Hong Kong). For December travel, compare total journey time, luggage allowances and change/cancellation policies; full-service carriers may cost more but include checked baggage and fewer add-ons, which can be beneficial during busy holiday travel. CTA: Compare airlines side-by-side for your December SAN→MNL dates to select the best balance of price and convenience.