You can Fast Travel in Hollow Knight: Silksong, but you must defeat the first boss in the game to gain the Fast Travel function. There are plenty of things you must perform to get the chance to slay the boss in the game. Here we are going to guide you through all the details you need to know to unlock Fast Travel in Hollow Knight: Silksong.
When Does Fast Travel Become Available In Hollow Knight: Silksong?

You must defeat the Bell Beast boss to unlock the ability to Fast Travel in Hollow Knight: Silksong. Bell Beast counts as the first boss encounter in the game, so prepare for a tough fight.
From the Bench available at the Marrow, get to the platform on the right and move to the right to reach the Bell Beast, but the boss will be trapped inside the web. You will need a special ability called Silkspear to break the web to free the Bell Beast from the webbing and defeat him. Follow our quick guide on where to find the Silkspear ability in Hollow Knight: Silksong. After learning the ability to make your way to the Bell Beast area, use the Silkspear ability to destroy the webs to free the beast and defeat him.
Once the Bell Beast is defeated, you will gain Silk Heart. As you are about to leave, the Bell Beast will emerge from the bells on the ground, but it will not attack you. Here, if you stand on the platform on the right, you will see the option to “Travel “on the screen. Here, you can choose to travel back to the Bone Bottom Area from The Marrow.
You can Travel to previous locations in the game only from these distinct spots. You can’t Fast Travel from anywhere in the game. Think of the Fast Travel spots as benches; you need to be at these specific spots to carry out the Fast Travel mechanic. Bell Beast will serve as a rider that helps you travel from one place to another in Hollow Knight: Silksong, as you further unlock Fast Travel spots in the game.