Yeah, I understand that, but I didn’t realize that before the HSR there were flights between Taipei and Hsinchu, which seem close enough that driving would be more convenient for most people.
Well TSA to KHH still kinda makes sense as both airports are right in town and the flight itself takes 35 to 40 mins
With push back back to gate within 60 mins
Back in the day there was a flight almost every 45
Mins and you can use any airline on any ticket and prices were fixed so no complications And tickets were good for a year and no penalties for no show
They ran like shuttles and there was no long security line
Basically show your ID get your reusable boarding pass which you surrendered at the gate
No high security taking up a long time
So just taxi to airport and taxis from airport
No fuss
Tickets were less than 2000nt IIRC
When I first started flying that route tickets were 650nt IIRC
To be honest I’d rather take the HSR with its 90 mins point to point
Flights really only make sense TSA and KHH to Taitung now
They were pushing east coast tourism hard in 2017-2019. Penghu also had flights to HK, PRC. If you go to the airport you can see their shuttered dusty customs area.