There are two airports in Kyiv. One is Boryspil International Airport (KBP), one is Kyiv Sikorsky Airport (IEV).
From Boryspil International Airport (KBP) there is an express train.
Here is the schedule:
“Boryspil-Aeroport” - “Kyiv-Pasazhyrskyi” railway station
“Kyiv-Pasazhyrskyi” railway station - “Boryspil-Aeroport”
If you are coming to Kyiv Sikorsky Airport (IEV), we recommend you to take a taxi OnTaxi or Uber - approx. price to Zolotie vorota (Golden Gate) is 4 EUR.
Best to search accommodation close to Zolotie vorota (Golden Gate)