The US vaccine roll-out has been patchy and many European countries are discouraging travel and implementing more travel curbs to contain the spread of new infections.
Despite strong cost-cutting efforts in place, airlines continue to burn millions of dollars of cash every day.
While the company expected the election to impact trends, it is unclear whether the softness in booking trends is also a direct result of the recent rise in COVID-19 cases.
"As such, the company remains cautious in this uncertain revenue environment."