As a result of the new things introduced by Survival Mode, when enabled Fallout 4 won’t allow you to fast travel between the game’s locations. This is something you will fall in love with in case you appreciate the most realistic mods now available for Bethesda’s game and if you liked that in Fallout: New Vegas as well.
Anyway, since it still is in beta, Survival Mode isn’t perfect already. There is a way, in fact, to work around this lack of fast travels, as discovered by a Reddit user.
Get the pip-boy app you have installed on your smartphone and select the location you want to fast travel to. There isn’t anything blocking you from doing that at this point but, again, since the Survival Mode is in beta we think this exploit won’t… survive the final release.
In case it should, we really hope Bethesda will fix it since the lack of fast travel is something defining the Survival Mode itself. It would be a terrible mistake not getting the point there.