This study validates aviation’s radiation hazard mitigation strategy articulated by numerous stakeholders to deviate flight paths to lower altitudes and lower magnetic latitude routes during major geomagnetic storms. Not only does this approach mitigate HF communication outages but it also reduces risks from increased GNSS errors for take-off and landing navigation. Lower latitude magnetic field shielding is an important risk reduction factor for radiation, communication, and navigation while lower altitude atmospheric shielding reduces radiation hazard risks. These findings point to policy implementation in international aviation.