The flight distance from Cascais Airport (CAT) in Cascais Airport, Portugal to San Francisco International Airport (SFO) in San Francisco, United States is 9,111 kilometers (5,661 miles / 4,919 nautical miles). The estimated flight time for this route is approximately 12h, flying northwest at a heading of 313°.

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 Portugal 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 05:44 in Cascais Airport, it's 21:44 in San Francisco. With a 8-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 Francisco (SFO) to Cascais Airport (CAT) follows a heading of 46° (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 Cascais Airport (CAT) and San Francisco International Airport (SFO) detail pages, or use our flight duration calculator to compare other routes.