When trains are cancelled (at least in Europe), and there are no alternative ways to get travellers to their destination by train a little bit later, there are often replaced by buses to get travellers to their destination.
Currently, I've been rebooked twice to get on a flight to a destination that is only 383 km by road. Originally I should have flown on Monday evening, and currently I'm booked on a flight Wednesday morning, effectively a 36 hour delay. If the airline had booked a bus, all Monday evening passengers would have arrived to the other airport by Monday night, with perhaps a 4–5 hour delay. To me, it would make sense from the perspective of customer satisfaction.
Does it happen that airlines offer to bus passengers to their destination when cancellations lead to multi-day delays, but a bus would take only several hours? If not, why not?
Many passengers, including me, travel to destinations beyond the airport that is 383 km by road, but travelling the short-haul flight segment by bus in order to wait for the first available connection would still benefit travellers.