Completed my trip on Monday and had some data to report back. Sitting in the aisle seat of a United CR2 from ATW-ORD and had no problem getting a GPS fix using GPS Test. I really liked GPS test and will keep it for future flights, really liked that is showed me speed, heading and altitude. Tried three mapping apps while airborne: Flyover Country, Maps.me and Here WeGo. Of the three, Flyover Country was the clear winner. Gave me the location, speed and altitude at a glance and was able to use it to identify what I was seeing out of my window on the UA 753 from ORD-MCO. Maps.me and Here WeGo are both rather obviously designed for car use and weren't nearly as helpful in the air. On the trip back nothing worked as well as it did on the way down. I was on a DL A321 from MCO-MSP in an aisle seat and was not able to get a GPS lock at all. I tried for about twenty minutes a couple different times and couldn't get it to lock up. The DL CR2 from MSP-ATW I was in the same seat as I was on the UA one a few days earlier and it was intermittent to get a lock. Took 5 minutes to get the first one and then would lose lock for 10-15 minutes at a time, get it back for a few minutes and lose it again. GPS Test and Flyover Country will be on my phone when I fly with my son MSP-SAN in a couple months so I have answers when he asks me what that is out of his window.