10-12-2018, 05:31 PM
I looked at flightaware.com and you can look back in time. You can look at flights from an airport as well so I looked at Hilo but didn't see anything that flew over HPP Thursday afternoon other than helicopters. There were a couple of flights for which no information was shown. I also don't think that site shows military flights, so if it was a coastguard flight it probably wouldn't have been shown.
https://www.flightradar24.com/ is a site that also tracks flights but am not too familiar with it so haven't checked there.
https://www.flightradar24.com/ is a site that also tracks flights but am not too familiar with it so haven't checked there.