There is no nonstop path connecting Idaho's high desert to the Balkan coast, which is precisely what makes booking business class from Boise to Podgorica an exercise in routing strategy rather than simple search-box shopping. The honest answer for anyone typing this exact query into Google: there is no direct flight, and total journey time runs roughly 12.5 hours of air time spread across two or three segments, meaning your real decision is which hub carrier gets you there with the fewest headaches and the best hard product. Delta, Lufthansa, and Turkish Airlines all touch this corridor in different ways, and after flying it multiple times, I lean toward routing through Frankfurt or Munich on Lufthansa, connecting onward to Tirana or Dubrovnik with a short drive or puddle-jump into Podgorica, since Montenegro's own airport infrastructure remains limited for wide-body long-haul connections.
Lufthansa's Allegris business class, now rolling out across more 787 and A350 rotations, is worth chasing on the transatlantic leg from a West Coast Delta-fed connection into Frankfurt or Munich — the suite doors and adjustable panels make the eight-hour ocean crossing genuinely restful. Delta itself will get you from Boise to a major gateway like Seattle, Salt Lake, or Atlanta, then onward to Amsterdam or Paris via joint-venture partners, where Delta One suites with sliding doors are now standard on most reconfigured 767s and A330s. Turkish Airlines is the wildcard worth considering: routing through Istanbul opens excellent onward frequency into the Adriatic region, and their business class lounge in IST remains one of the most theatrical in the industry, complete with a live cooking station — arrive with time to enjoy it, since it's part of the experience, not just a waiting room.
My insider tip: book the Istanbul routing during shoulder months like October or March, when Turkish often opens saver business awards on the Boise-adjacent US gateways before European summer demand tightens inventory. Given how thin and seasonal these fare buckets are, setting up automated price and award-space alerts for this specific routing is the smartest move you can make before committing to dates.