How far is Harrisburg pa from derby ct?

250 miles taking this route:

1. Take ROUTE 8 - SOUTH (towards BRIDGEPORT), from Derby, to I-95 SOUTH to New York City.
2. Take I-95 SOUTH to I-287 WEST to TAPPAN ZEE BRIDGE at EXIT 21 in NEW YORK.
3. Take I-287 WEST & SOUTH, around NYC, to I-78 WEST to ALLENTOWN at EXIT 21B in New Jersey.
4. Take I-78 WEST to I-81 SOUTH to HARRISBURG at EXIT 1A in Pennsylvania.
5. Take I-81 SOUTH to Harrisburg.