Here are the most popular services to Denmark along with their average travel times. Download a podcast to make your flight whiz by: New York, NY (JFK-John F. Kennedy Intl.) to Kastrup Airport (CPH) - 7 hours and 52 minutes Newark, NJ (EWR-Liberty Intl.) to Kastrup Airport (CPH) - 7 hours and 45 minutes Chicago, IL (ORD-OHare Intl.) to Kastrup Airport (CPH) - 8 hours and 20 minutes