We recommend booking a flight to the Madrid-Barajas Airport then making your way to the castle!
There are a couple of different ways to get to Sigüenza.
1) Renfe- This is Spain's train system that connects towns and cities throughout the country. They have slower trains and high-speed AVE trains and have a station in Sigüenza.
If you are traveling from Madrid you can leave from the Madrid-Chamartín-Clara Campoamor station in the North (direct) or from the more centrally located Madrid-Puerta de Atocha station (which travels through Chamartín).
From Madrid, it is a 1.5-2 hour train ride with stops.
For more information and to buy tickets visit www.renfe.com
2) Rental Car - You can take a beautiful scenic route by car via the highway from Madrid to Sigüenza via the A2 (N-II).
There are two places from which you can exit the highway to arrive at Sigüenza.
1. At km 104, take the exit for the CM-1101 (23 km from Sigüenza)
2. At km 136 take the Alcolea exit (20 km from Sigüenza)
3) Bus - You can also take a bus from Madrid (various stops available) to Sigüenzs (one stop).
To find more information about how to get to Sigüenza click on the link.
https://www.visitasiguenza.es/como-llegar/