The flight distance from Chiang Rai International Airport (CEI) in Chiang Rai, Thailand to Sydney Kingsford Smith International Airport (SYD) in Sydney, Australia is 8,087 kilometers (5,025 miles / 4,366 nautical miles). The estimated flight time for this route is approximately 11h, flying southeast at a heading of 137°.

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

Time zone information: When it's 04:29 in Chiang Rai, it's 08:29 in Sydney. The 4-hour time difference may cause some jet lag. Most travelers adjust within a day or two.

There is a significant elevation difference of 1,259 feet between the two airports. Sydney Kingsford Smith International Airport sits lower than Chiang Rai International Airport.

The return flight from Sydney (SYD) to Chiang Rai (CEI) follows a heading of 310° (northwest). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

For more information about these airports, visit the Chiang Rai International Airport (CEI) and Sydney Kingsford Smith International Airport (SYD) detail pages, or use our flight duration calculator to compare other routes.