The Original Delta flyer took an unknown amount of days to build, and they pretty much dedicated all resources and manpower possible to build it while the ship remained in orbit of a gas giant.
The second Delta Flyer took even longer to rebuild.
A federation shipyard? Could probally spit out a shuttle ready to fly in far less than 24 hours.
As a lot of people probally know, the Delta Flyer is going to be craftable towards the end of Series 3 at Memory Alpha.
I don't know about anyone else, but i think Memory Alpha really is not the right place to craft/build/research starships.
A far more suitable location for this would be Utopia Planitia Shipyards
With that in mind, I think Cryptic should seriously consider moving the crafting location for the Delta Flyer to said location.
There already is a Klingon Episode that specificly involves a raid Utopia Planitia Shipyards, which means the map already exists.
So what Cryptic would need to do is just take that map from the mission and add a ship/shuttle crafting console with a waypoint of sorts from SOL or sector space.
Who's with me!!?
Aye Use Utopia Planita for any future ship building too Interior design could be interesting :O walking inside a drydock above a docked ship