Well, a compression fitting doesn't actually replace a flared tubing, but I'm sure the OP will easily piece together a fuel line that will work. A ferrule compression fitting on a piece of metal line that came in a roll will often leak, since coiling the metal line distorts it and makes it egg shaped. My fuel lines , which usually include non-stock filters, are usually combinations of rubber fuel line, barbed fittings, and copper lines. When connecting a rubber fuel line to a copper line, I always put a small single or double flare in the copper line to prevent the hose from slipping off ( even though I also use a hose clamp). Years ago, I connected the transmission cooler lines on my car with two hose clamps, but no barb in the metal line to keep the rubber line on . Sure enough, the rubber line eventually slid off of the metal line, dumped most of the transmission fluid on the road, and deprived me of second gear for the last two years I drove the car. ( Having only first and third gear in the automatic transmission was adequate, but I soon learned that the kickdown from third to first was a bit extreme.)