Albuquerque's Sunport isn't built for transatlantic ambition, which is precisely why the routing strategy matters more here than almost anywhere else in the Southwest. There's no nonstop option, so business class from Albuquerque to Munich means threading through a domestic hub before crossing the Atlantic, and the choice of connection shapes the entire journey. American routes through Dallas-Fort Worth or Chicago O'Hare onto oneworld metal or joint-venture partners; Delta funnels through Atlanta or Minneapolis before linking to its SkyTeam network; United channels travelers through Denver or Houston into Star Alliance connections, often landing you on a Lufthansa-operated segment into Munich itself, which is Lufthansa's second-largest hub and a genuinely smooth arrival point with efficient immigration for Star Alliance business passengers.
Having flown all three carriers out of ABQ repeatedly, I'll say the real decision isn't domestic legroom — it's which widebody you draw for the ocean crossing. United's best play is securing a Polaris-operated transatlantic segment with the reverse-herringbone seat and proper direct-aisle access; Delta's strongest card is its A330 or A350 Delta One suites with sliding doors, typically flown out of Atlanta on the JFK or Boston relay; American's is Flagship Suite service on its 777s or 787s when routed through a major eastern gateway. My insider tip: if United routes you through Denver with a Lufthansa continuation into MUC, request the Lufthansa segment specifically when booking — their Munich-based crews tend to run a tighter, more polished cabin than some U.S.-originating equivalents, and arrival into Munich's Terminal 2 (the Star Alliance terminal) is notably faster for connections or immigration than Terminal 1.
Seasonally, this itinerary rewards patience: January, February, March, and the shoulder months of October and November consistently produce the softest fares, as Munich's Oktoberfest and summer trade-fair crowds thin out and business travel dips. Given how much these connection-dependent fares fluctuate week to week, setting up automated fare alerts for this specific ABQ–MUC pairing is the smartest way to catch a premium-cabin deal before it disappears.