Boulder to Lethbridge: Road Trip Guide & Distance

How far is Boulder from Lethbridge?

The distance from Boulder to Lethbridge is 763.6 miles (1228.9 km) as the crow flies. Lethbridge is located NNW of Boulder. By car, the driving distance is approximately 916.3 miles, taking about 18h 26min. A direct flight would take roughly 2h 2min. Boulder is in Colorado, United States, while Lethbridge is in Alberta, Canada.

This is a serious multi-day road trip! We strongly recommend breaking this journey up with an overnight stay to ensure you arrive safely and refreshed. Since you'll be heading mostly West, pack a good pair of sunglasses if you plan to drive during the late afternoon to avoid the harsh sun glare. Keep in mind this route crosses international borders. Don't forget your passport, and check current border crossing times and vehicle insurance requirements. For a trip of this distance, flying is significantly faster. However, driving offers the flexibility to explore stops along the way.

Coordinates come from public place data for Boulder and Lethbridge. The driving distance is estimated from straight-line distance with a road-factor model, so confirm the route in your navigation app. Fuel, flight, bus, and train values are planning estimates and can change by date, provider, road closures, and border rules.