The flight distance from RAF Ascension Island (ASI) in Ascension Island, SH to George Bush Intcntl/Houston Airport (IAH) in Houston, United States is 9,589 kilometers (5,958 miles / 5,178 nautical miles). The estimated flight time for this route is approximately 12h, flying west northwest at a heading of 301°.

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 SH with United States. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 22:20 in Ascension Island, it's 17:20 in Houston. The 5-hour time difference may cause some jet lag. Most travelers adjust within a day or two.

The return flight from Houston (IAH) to Ascension Island (ASI) follows a heading of 101° (east southeast). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

For more information about these airports, visit the RAF Ascension Island (ASI) and George Bush Intcntl/Houston Airport (IAH) detail pages, or use our flight duration calculator to compare other routes.