STOCKHOLM, Sept. 18 — Multiple commercial flights have reported GPS and satellite-navigation interference while operating over Swedish airspace during the past 24 hours, raising renewed concerns about GNSS reliability along a busy European aviation corridor.

According to a report by AIRLIVE, a KLM flight operating from Amsterdam to Helsinki experienced navigation anomalies while flying over southern Sweden on September 17. The crew contacted maintenance control after persistent satellite-signal loss triggered avionics-related warnings.

An Air Canada flight traveling from New Delhi to Toronto also reported GPS interference while crossing Swedish airspace early Friday. Both flights continued their journeys safely after crews dealt with the navigation disruption.

Swedish aviation information currently includes an official warning that GNSS operations may be affected by jamming and spoofing, with GPS described as potentially unreliable or unavailable in the southeastern part of the Sweden Flight Information Region. The notice is valid from September 7 through October 23, 2026.

What GPS jamming means for aircraft

GPS jamming occurs when radio-frequency interference overwhelms satellite-navigation signals received by an aircraft. Because GPS signals arriving from satellites are relatively weak, interference can prevent aircraft systems from receiving reliable positioning information.

A GPS disruption does not normally mean an aircraft loses control. Modern airliners have multiple navigation systems and can use alternatives such as inertial navigation and ground-based radio navigation aids. However, interference can trigger cockpit alerts, affect automated navigation functions and increase the workload for flight crews.

The problem is different from GPS spoofing, in which false satellite-navigation signals can cause an aircraft system to calculate an incorrect position.

Growing European concern

GNSS interference has become an increasingly important issue for European aviation. Previous reports have documented widespread jamming and spoofing affecting aircraft operating around the Baltic and northern European regions.

The latest incidents over Sweden highlight the continuing need for airlines and aviation authorities to maintain alternative navigation procedures and ensure crews are prepared to operate when satellite-navigation signals become unreliable.

At present, the reported flights were able to continue safely, and there is no indication from the available information that the interference resulted in an accident or loss of control.