US airlines and airports are preparing for a surge in passengers over the Thanksgiving holiday, with the number of travelers expected to hit the highest level in three years.

Nearly 55 million Americans will take to the roads, skies and rails for the holiday, with air travel recovering to about 99 percent of the 2019 levels before the Covid-19 pandemic, travel group AAA estimates.

"I expect most flights to be running very full," said John Grant, senior analyst at travel data firm OAG. "So finding a seat ... might be quite difficult."

Weary of coronavirus-related lockdowns, Americans are eager to travel more as the impact of the pandemic eases. However, staffing and aircraft shortages have capped the airline industry's ability to ramp up capacity, resulting in fewer seats and higher fares for travelers.

Eric Fabricant, 38, of Connecticut, was flying on Monday from Newark International Airport to San Francisco for the holiday and his ticket cost him US$800 compared with US$250 two years ago.

"I'm always a little bit worried about delays because I don't feel like the airlines are as reliable," he said, citing concerns about exposure to Covid-19 on more crowded planes. "Knock on wood that works out.”

Thanksgiving Eve on Wednesday tends to be the busiest day for travel. However, the option to work remotely has allowed many Americans to stretch out their trips and avoid the last-day rush.

The new travel pattern is also expected to ease the pressure on airline operations, said Sharon Pinkerton, a senior vice president at Airlines for America (A4A), an industry trade group. Yet A4A and analysts are advising travelers to pack their patience and arrive early to allow extra time for security.

"We are delighted that (travel) demand is returning," U.S. Transportation Secretary Pete Buttigieg said on Monday at an event at Chicago O'Hare Airport. "I would not say we're out of the woods ... But I am cautiously optimistic about this week being off to a good start." (Reuters)