Aeroméxico: Strong nonstop presence on the JFK→MEX route with full-service cabins, competitive business class, and SkyTeam alliance benefits. Expect standard international baggage allowances and good schedule choices in January. Delta Air Lines: Offers solid service, SkyMiles accrual, and reliable customer support; may operate nonstop or connecting options depending on the day. American Airlines: May offer one-stop options via Dallas or direct seasonal flights; AAdvantage members should compare award availability and fees for January travel. JetBlue: Competitive fares and extra legroom in some economy options, often with connections; best for travelers prioritizing value and in-flight entertainment. When choosing an airline for January travel from John F. Kennedy International Airport (JFK) to Mexico City International Airport (MEX), compare total trip cost including baggage, seat selection, and change policies, and book with the carrier that matches your comfort and loyalty preferences.