I'd like to go from San Miguel Allende to Terminal 2 of the Mexico City airport on a first-class Primera Plus bus on Friday the 22nd. I'm having trouble purchasing a ticket or even getting the schedule on the Primera Plus website and my Spanish isn't good enough for a call.
I believe I get the bus at the Calle Canal station in SMA and change in Queretero direct to the airport. I can only access the airport-to-Queretero route online and not the other way around, but it looks like buses leave hourly. Do you know if it's possible to show up and buy a ticket without a reservation and/or if some buses have less frequent stops than others? If not I'll have to go to the station in advance as I can't seem to make the website work.
Any advice you could give me would be most appreciated.