(Reuters) -U.S. carriers American Airlines and Southwest Airlines on Thursday signaled slower cash burn and pointed to a rebound in summer bookings as accelerated COVID-19 vaccinations make more people confident about traveling again. After nearly a year in the doldrums due to the pandemic, airlines are seeing light at the end of the tunnel with over 50% of the U.S. population having received one dose of the vaccine. “March was clearly a significant improvement over January and February and guidance is for continued improvement into the June quarter and the summer beyond it,” Cowen and Co analyst Helane Becker said. Southwest forecast second-quarter average daily core cash burn between $2 million and $4 million, compared with about $13 million per day in the prior quarter. It expects second-quarter capacity to rise about 90% from a year earlier. “In a normal year, at this point, we would expect to be around 60% booked for May roughly 35% or so booked for June and around 20% booked for July,” Southwest President Thomas Nealon said. “We are currently in the hunt with those levels of bookings.” American said average daily cash burn slowed to $4 million in March, while its overall average daily cash burn rate was about $27 million in the first quarter. American sees capacity to be down between 20% and 25% compared with 2019, slowing from a 35% fall in the previous quarter. Southwest shares were up about 1%, while American Airlines stock was down about 1.8%. American has a bigger exposure to international travel, which is not expected to rebound soon as most borders remained closed, analysts have said. “I know (the Biden administration) understands the importance of restoring international travel to the economy,” American Airlines CEO Doug Parker said. “We all need to go look at this in a risk-based way. No one wants to rush for certain, and no one’s pushing that either.” Southwest is recalling some furloughed pilots and flight attendants, while American plans to do it later this year to prepare for 2022. Meanwhile, operating revenue at the companies fell more than 50%, slower than the about 65% fall in the fourth quarter. Alaska Air Group also forecast improving cash flow from operations after reporting a smaller-than-expected loss.