Not normally but I think if there's room they might accept. You need to call to find out.
Usually they allow a different time on the same day... Maybe call customer service and check if it's going to be a different day
Depends on the ticket. I know that when I get a round trip ticket to the Logan airport and arrive a day late on the returning flight, the bus driver accepts the ticket as long as there is room for me on that bus.
Pretty sure call and check
Thanks! Your answer is awaiting moderation.