Prague is about 395 km from the ocean.
If you're driving to a town near the beach or coastline, you could try Szczecin.
How far is Kalamazoo from the ocean
How far is Leavenworth, WA from the ocean
How far is Newport, OR from the ocean
How far is Dana Point from the ocean
How far is Anchorage from the ocean
How far is Solvang from the ocean
How far is Colorado Springs from the ocean
How far is Gainesville from the ocean
How far is Solana Beach from the ocean
How far is Phuket from the ocean