I use a Garmin ETrex HCx and it will even get signal from the middle and sometimes aisle seat if it is orientated right and depending on the plane. If you're by the window it's solid. It is best to let it aquire sats at the gate and not while flying. I have tracks from DFW-ORD-FCO and back and all over the US. I especially like using it to know when to see meteor crater on the DFW-LAS flight. Keep it out of sight, I have been scolded.