How many miles from Heathrow to Dublin by air?
242 air miles.
The Distance between London / Heathrow Airport (England,UK) [Airport] and Dublin (County Dublin,Ireland) is : 443.32 kilometers (km). In Other Units: 275.46 miles. 239.21 nautical miles. Note: the distance is straight line distance (may be called as flying or air distance) between the two locations calculated based on their latitudes and longitudes. This distance may be very much different from the actual travel distance.