For a route under 3,500 nm and a passenger load under ten, a super-midsize aircraft is almost always the right answer. Challenger 3500, Citation Longitude, Gulfstream G280, Praetor 600. Non-stop transcontinental range within the continental United States, non-stop London to Athens, non-stop Los Angeles to Anchorage, all inside the same airframe class. Hourly rates run roughly thirty percent less than comparable heavy metal, and parking fees track proportionally lower.
For a route over 3,500 nm, or for a passenger load above ten with significant baggage, heavy is the practical floor. Falcon 2000LXS, Challenger 650, Gulfstream G450, Legacy 650. Transatlantic eastbound is a comfortable non-stop on any of these airframes with winds; westbound holds reserves. Above 4,500 nm sector length, the calculus shifts again to ultra-long-range: Global 7500, G650ER, G700, Falcon 8X. Our Flight Desk quotes both options wherever the sector sits near a category boundary.