The Airbus A321neo-LR is certified for long-range flights up to 11-12 hours nonstop, though most TCS legs are 4-8 hours. Itineraries are designed with passenger comfort in mind, including rest days between long flights and timing to arrive with daylight when possible. Overnight flights are avoided at all costs.
The aircraft’s lie-flat seating makes long flights far more comfortable than commercial business class.
