The flight distance from Prefeito Doutor Joao Silva Filho Airport (PHB) in Parnaiba, Brazil to Seattle-Tacoma International Airport (SEA) in Seattle, United States is 9,540 kilometers (5,928 miles / 5,151 nautical miles). The estimated flight time for this route is approximately 12h, flying northwest at a heading of 318°.

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

Time zone information: When it's 02:00 in Parnaiba, it's 22:00 in Seattle. The 4-hour time difference may cause some jet lag. Most travelers adjust within a day or two.

The return flight from Seattle (SEA) to Parnaiba (PHB) follows a heading of 99° (east). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

For more information about these airports, visit the Prefeito Doutor Joao Silva Filho Airport (PHB) and Seattle-Tacoma International Airport (SEA) detail pages, or use our flight duration calculator to compare other routes.