NK,
Although I've never heard of headphones triggering Migraines, I certainly can't say it's not possible.
Flying is a trigger for many of us becuase of the altitude and changes in pressure.
I use the Bose headphones when I fly, and they've not bothered me, but we're all different, so I don't know if that tells you much.
Sorry I couldn't give you more specific inforamtion. You might want to mention this to your doctor the next time you have an appointment.
Teri