The flight distance from Cardiff International Airport (CWL) in Cardiff, United Kingdom to Washington Dulles International Airport (IAD) in Washington, United States is 5,720 kilometers (3,554 miles / 3,089 nautical miles). The estimated flight time for this route is approximately 8h, flying west northwest at a heading of 287°.

This is a long-haul route typically operated by wide-body aircraft such as the Boeing 777 or Airbus A350. Full meal service, in-flight entertainment, and comfort amenities are standard.

This is an international route connecting United Kingdom 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 11:11 in Cardiff, it's 06:11 in Washington. The 5-hour time difference may cause some jet lag. Most travelers adjust within a day or two.

The return flight from Washington (IAD) to Cardiff (CWL) follows a heading of 50° (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 Cardiff International Airport (CWL) and Washington Dulles International Airport (IAD) detail pages, or use our flight duration calculator to compare other routes.