The flight distance from St Mary's Airport (KSM) in St Mary'S, United States to San Diego International Airport (SAN) in San Diego, United States is 4,596 kilometers (2,856 miles / 2,481 nautical miles). The estimated flight time for this route is approximately 6h, flying east southeast at a heading of 113°.

This is a long-haul route typically operated by wide-body aircraft such as the Boeing 777 or Airbus A350. Full meal service, in-flight entertainment, and comfort amenities are standard.

This is a domestic route within United States. Both airports operate in the same country, which may simplify travel requirements and documentation. Despite being a domestic route, there is a 1-hour time difference between the two cities.

Time zone information: When it's 05:59 in St Mary'S, it's 06:59 in San Diego.

The return flight from San Diego (SAN) to St Mary'S (KSM) follows a heading of 329° (north northwest). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

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