United Airlines: Commonly used for routing through Los Angeles (LAX) or San Francisco (SFO) with one-stop itineraries to Antonio B. Won Pat International Airport (GUM), strong for U.S. frequent flyers. Hawaiian Airlines: Ideal if routing via Honolulu (HNL), offering Pacific expertise and comfortable service for island segments. Japan Airlines and Korean Air: Best for itineraries that route through Tokyo (NRT/HND) or Seoul (ICN), useful if combining Guam with Asia stops. Philippine Airlines: An option when routing via Manila (MNL) for price-sensitive travelers. Compare fare classes, baggage allowances, and alliance status; choose based on layover length, total travel time, and stopover preferences. CTA: Check multi-airline itineraries and alliance partners to maximize upgrade and baggage benefits for November travel.