Delta Airlines Oslo Office A variety of services are offered by the Delta Airlines Oslo Office to help passengers flying to and from Oslo. The office, which is situated at Gardermoen Airport, provides passengers with flight information, ticketing, and customer service. The employees at the Delta Airlines office in Oslo are here to make sure your trip goes smoothly, whether you need assistance making a reservation, modifying your flight, or handling any other travel-related concerns. The office provides the excellent level of service for which Delta Airlines is renowned and is conveniently located to serve both business and leisure customers.