The flight distance from Seattle-Tacoma International Airport (SEA) in Seattle, United States to Christmas Island Airport (XCH) in Christmas Island, CX is 13,939 kilometers (8,661 miles / 7,526 nautical miles). The estimated flight time for this route is approximately 17h, flying west northwest at a heading of 296°.

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 CX. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 16:11 in Seattle, it's 07:11 in Christmas Island. 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 Christmas Island (XCH) to Seattle (SEA) follows a heading of 38° (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 Christmas Island Airport (XCH) detail pages, or use our flight duration calculator to compare other routes.