The flight distance from Seattle-Tacoma International Airport (SEA) in Seattle, United States to Southern Cross Airport (SQC) in Southern Cross Airport, Australia is 14,570 kilometers (9,053 miles / 7,867 nautical miles). The estimated flight time for this route is approximately 18h, flying west at a heading of 266°.

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 United States with Australia. It is an intercontinental flight between North America and Oceania. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 16:00 in Seattle, it's 07:00 in Southern Cross Airport. With a 15-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 Southern Cross Airport (SQC) to Seattle (SEA) follows a heading of 52° (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 Seattle-Tacoma International Airport (SEA) and Southern Cross Airport (SQC) detail pages, or use our flight duration calculator to compare other routes.