invented to keep out the cold
She informed Mother of her plans yesterday, and got much the same response as when she was going off to be a caravan guard — somewhat less skepticism, but only somewhat. (And Mother knows she suddenly picked up second circle, and has been conspicuously not asking why. Some of the skepticism has probably come and gone.) That means she doesn't need to wait for anything!
Teleports to Magnimar aren't jumping as far as most Teleport routes go, and the path is doable by ship. It's correspondingly less valuable, and thus fewer wizards run the trip. On the other hand, unlike most Teleport connections from Korvosa, this one has quite a bit of regular active trade along those very same ships, which means a Teleport can handle all the things which a ship fails to handle in time. Apparently there's some scheme where this makes all the shipping more efficient between the two, because anything which is too slow goes on a Teleport and therefore there's no need to wait as long as you buy transport services through the Bank of Abadar and don't need any specific promises about how exactly it will go? She didn't follow all of it, honestly, the Bank clerks were very enthusiastic and very certain it was a clever and valuable scheme and that was all she really needed to know.
The important part of all of this is that there's a Teleport every two or three days, despite how short a route it's covering. Three a week. Fortunately, there happened to be one scheduled for today, so they didn't have to choose between rushing to be ready yesterday or delaying an extra day on getting to Magnimar. She meets Yanor an hour or so in advance, at the Bank.