It is 1,257.36 miles according to MapQuest.
It is about 1,250 miles by road from San Diego, CA, to Seattle, WA.
1,063 miles
About 100 miles
Seattle, WA is many miles further west than San Diego, CA. Actually, Spokane WA is just a mere 2 miles further West than San Diego, CA. The Meridian that passes the most west in Spokane is W 117.53 whereas the Merdian for San Diego is W 117.17.
Phoenix is 354.78 miles away from San Diego.
About 110 road miles.
It is about 440 miles.
20 miles
About 500 miles.
35 miles taking this route:Take 78 FREEWAY - EAST, from San Marcos, to I-15 SOUTH to SAN DIEGO off EXIT 17A.Take I-15 SOUTH to San Diego.
about 144 miles taking I-405 SOUTH to I-5 SOUTH, then I-5 SOUTH to San Diego.