Satellites are vulnerable because they are not shielded by the atmosphere. The grid is vulnerable because electrical wires sort of act as antennas, gathering energy along their entire path and focusing it on wherever they terminate.
Your plane will be fine. But in a worst case, GPS might be down and radios will not work, or only work over much shorter distances.
Both of those are unlikely, but not impossible. These were pretty strong ejections.
What more likely is that you'd find them distracting and overfly your destination because you're so busy looking at the light show.