Corrigan claimed to have noticed his "error" after flying for about 26 hours. This is not entirely consistent with his claim that after 10 hours, he felt his feet go cold; the cockpit floor was awash with gasoline leaking from the unrepaired tank. He used a screwdriver to punch a hole through the cockpit floor so that the fuel would drain away on the side opposite the hot exhaust pipe, reducing the risk of a midair explosion. Had he been truly unaware he was over ocean, it seems likely he would have descended at this point; instead, he claimed to have increased the engine speed by almost 20% in the hope of decreasing his flight time.
He landed at Baldonnel Aerodrome, County Dublin, on July 18, after a 28-hour, 13-minute flight. His provisions had been just two chocolate bars, two boxes of fig bars, and 25 US gal (94.64 L) of water.