The flight distance from Denver International Airport (DEN) in Denver, United States to Letterkenny Airport (LTR) in Letterkenny, Ireland is 6,883 kilometers (4,277 miles / 3,717 nautical miles). The estimated flight time for this route is approximately 9h, flying northeast at a heading of 40°.

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

Time zone information: When it's 02:58 in Denver, it's 09:58 in Letterkenny. With a 7-hour time difference, travelers should plan for significant jet lag. It typically takes one day per hour of time difference to fully adjust.

There is a significant elevation difference of 5,414 feet between the two airports. Letterkenny Airport sits lower than Denver International Airport. Travelers arriving at the higher-elevation airport should be aware of potential altitude effects.

The return flight from Letterkenny (LTR) to Denver (DEN) follows a heading of 300° (west 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 Denver International Airport (DEN) and Letterkenny Airport (LTR) detail pages, or use our flight duration calculator to compare other routes.