U.S. booking sites including Vrbo, Hopper, and KAYAK are seeing higher demand for spring and summer leisure travel as COVID-19 restrictions ease and travelers appear to be shrugging off added costs to plane tickets and road trips from rising fuel prices. “We are seeing strong booking activity for spring break and the beginnings of a very strong summer,” said Jamie Lane, VP of research at AirDNA, which tracks the daily performance of over 10 million properties on vacation rental firms Airbnb and Vrbo. Oil has soared over $100 a barrel as Russia’s invasion of Ukraine jolted global markets. But U.S. carriers including Delta Air Lines Inc., United Airline Holdings Inc., and American Airlines Inc. this week reported a strong rebound in travel demand after the blip caused by the Omicron coronavirus variant. AirDNA data said the booking pace for travel in the northern hemisphere spring is 49 percent higher than …