Distance from San Diego to Thornton by Car and Plane

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3. Distance Between San Diego and Thornton

The flight distance from San Diego (CA) to Thornton (CO) is 842 miles or 1355 kilometers or 731 nautical miles.
Driving distance from San Diego to Thornton is 1089 miles (1754 kilometers).
Difference between fly and travel by a car is 247 miles or 399 km.

San Diego to Thornton Flight Route Map

Map Showing the Distance Between San Diego, CA and Thornton, CO
This map shows the distance from San Diego, CA, Usa to Thornton, CO, Usa. You can also see the distance in miles and km below the map. Flight route map from San Diego, California to Thornton, Colorado is displayed below.

Driving distance from San Diego, CA to Thornton, CO

The driving distance from San Diego, California to Thornton, Colorado is 1089 miles or 1754 km.
The total driving distance from San Diego, CA to Thornton, CO is 1089 miles or 1754 kilometers. Your trip begins in San Diego, California. It ends in Thornton, Colorado.
The driving distance from San Diego, California to Thornton, Colorado is approximately 1089 miles (1754 kilometers), depending on the specific route you take. Without considering any traffic or other delays, driving this distance typically takes around 19 to 20 hours under normal conditions.

Driving time from San Diego, CA to Thornton, CO

How long is the drive from San Diego, CA to Thornton, CO?
The total driving time is 19 hours, 11 minutes.
How long does a car ride from San Diego to Thornton take?
San Diego and Thornton are 19 hours 11 mins far apart, if you drive non-stop.

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Attention! According to the recommendations of experts, you should stop and take a break every 2 hours on average, take a fresh air and walk a little to protect your alertness and health during long trips by car. In addition, you can drink some coffee to prevent you from sleeping. People who drive constantly without taking a break lose their focus and can eventually cause accidents. Also, please drive carefully and follow the speed rules.

Time Difference between San Diego and Thornton

Time difference between San Diego (CA) and Thornton (CO) is 1 Hours.
Thornton time is 1 Hours ahead of San Diego.

Current local time in San Diego	Current local time in Thornton
2026-04-01, 14:29:40 PDT	2026-04-01, 15:29:40 MDT

How Far is it Between San Diego California, USA and Thornton Colorado, USA?

You can compare air and road distance between San Diego, CA and Thornton, CO in this summary table of distances in miles, kilometers and nautical miles.

Distance type	Miles	Kilometers	Nautical miles
Driving distance	1089 mi	1754 km	945.69 nmi
Straight line distance	842 mi	1355 km	731 nmi
Difference	247 mi	399 km	214 nmi

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