Bus service is mostly via Ankara or Samsun, so you may have to change buses there.
Sinop has no trains.
The nearest airport is at Samsun.
Distances & Travel Times
Amasra:312 km (194 miles) W, 7 hours by car (no direct bus service)
Amasya:263 km (163 miles) S, 5 hours
Ankara:434 km (270 miles) SW, 8 hours
Boğazkale:390 km (242 miles) S, 7 hours
Çorum:307 km (191 miles) S, 6.25 hours
Giresun:377 km (234 miles) E, 7 hours
Istanbul:700 km (435 miles) W, 13 hours
Kastamonu: 192 km (119 miles) SW, 4 hours
Safranbolu:300 km (186 miles) NE, 5.5 hours
Samsun:168 km (104 miles) NW, 3 hours
Trabzon:514 km (319 miles) E, 9 hours
—by Tom Brosnahan