The flight distance from Ciampino Airport (CIA) in Roma, Italy to San Diego International Airport (SAN) in San Diego, United States is 10,268 kilometers (6,380 miles / 5,544 nautical miles). The estimated flight time for this route is approximately 13h, flying northwest at a heading of 320°.

This is an ultra-long-haul route, one of the longest in aviation. It requires wide-body aircraft with extended range capability such as the Airbus A350-900ULR or Boeing 777-200LR. Passengers should prepare for an extended flight with multiple meal services.

This is an international route connecting Italy with United States. It is an intercontinental flight between Europe and North America. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 06:45 in Roma, it's 21:45 in San Diego. With a 9-hour time difference, travelers should plan for significant jet lag. It typically takes one day per hour of time difference to fully adjust.

The return flight from San Diego (SAN) to Roma (CIA) follows a heading of 35° (northeast). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

For more information about these airports, visit the Ciampino Airport (CIA) and San Diego International Airport (SAN) detail pages, or use our flight duration calculator to compare other routes.