Closest Major City to Dublin: Belfast

Straight-Line Distance: ~165 km (103 miles)

Belfast, capital of Northern Ireland, is the nearest major city to Dublin. The drive via M1/A1 takes ~2 hours (165 km / 103 mi).

Other Close Cities

• Derry/Londonderry: ~230 km (143 mi) northwest.
• Liverpool (via ferry): ~220 km sea route; 8 hr ferry + drive.
• Glasgow/Edinburgh: ~350 km + flight/ferry.

Why Belfast?

Geography: both cities sit on the Irish Sea coast, separated by the Mourne Mountains and County Louth. Historically linked by trade, migration, and the Enterprise cross-border rail service (2 hr 15 min).

Note: If considering any settlement, Warrenpoint (NI) is ~90 km south of Dublin, but Belfast is the closest city by standard definitions.