Getting from the Rockies to the Algarve coast requires patience and smart routing, since no carrier offers a one-stop shortcut worth bragging about—there is no nonstop business class from Boise to Faro, and there won't be anytime soon given the market size. Instead, the savvy move is routing through Delta's Atlantic gateways like JFK or Boston, then connecting onward via a European partner, or building an itinerary through London on British Airways, whose Club Suite—with its sliding door and direct aisle access—makes the transatlantic leg feel like a proper reset before the short hop down to Faro. TAP Air Portugal, Portugal's flag carrier, is the other essential piece of this puzzle, and flying into Lisbon on TAP's A330neo business class, with its lie-flat seats and Portuguese-inflected service, sets a genuinely pleasant tone before the quick domestic connection to Faro's compact, easy-to-navigate airport.
Having routed this journey multiple times, I've found that Lisbon is the more elegant hub than London for the final approach—TAP's frequency into Faro is generous, especially as Algarve season ramps up, and immigration in Lisbon tends to move faster than the queues at Heathrow's Terminal 5. If you're connecting through London instead, build in extra buffer time; BA's short-haul Faro flights depart from a different terminal than the long-haul arrivals, and Heathrow's internal transfer process punishes tight connections. One insider tip few travelers know: booking the BOI–JFK or BOI–ATL domestic segment separately from the transatlantic business fare, then pairing it with a TAP or BA award or discounted fare, often unlocks better seat availability than a single through-itinerary search will surface.
April, May, September, and October are the sweet spots here, both for Algarve weather and for business class award space, as summer's beach crowds thin out fares considerably outside peak season. Given how few weekly options exist on this city pair, prices swing quickly when a hub carrier releases premium inventory—which is exactly why setting up fare alerts for this specific corridor pays off far more than manual searching ever will.