Well, I can tell you, I'm pretty on top of the industry, I get a few of the industry magazines and know most of the world airliners. I have never heard of Flash, if its a 2 plane operation, I would wager that they are pretty chintzy on their maintenance. As for charters, there are scads of charters from Sharm and Hurghada.
Egypt Air is a large airline, but when I flew them, the JFK-CAI flight was on a brand new 777, however, the CAI-Hurghada was on a fairly new A340 widebody that was in pretty ragged shape. At Cairo, I saw some pretty nasty looking planes from some charters that looked a bit dodgy. In Europe, charters like this are common, there are plenty of them, at all ranges of quality.
My fraternity brother was a United mechanic,now he's with Jet Blue. He won't fly any of the small guys, like Allegro...
His opinions on most of the plane crashes that end up on FR threads wouldn't go over well with most of the people here, so I never post them