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The straight line between two Alberta places is computed from coordinates and is exact. The road distance is either a figure checked along a named highway, or an estimate that says so — because north of Slave Lake the road can be nearly three times the straight line, and a number that hides that is worse than no number.
281 km
Straight line, Edmonton to Calgary
299 km
By road
3 h 9 min
Driving time
175 mi
Straight line in miles
Road distance checked along Highway 2 (QEII). Driving time assumes highway speeds and no stops, which is not how anyone actually drives it.
Coordinates are town centres to about half a kilometre — fine for a straight line between towns, not a survey. The list above is deliberately short: a long table of guesses dressed up as checked distances would be worse than no table at all.
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