NEW YORK (NYTIMES) - Across America on Monday (Nov 8), airports expect to be filled with people reuniting with significant others, parents and friends from the 33 countries that have been prohibited from travelling directly to the US for more than 18 months.

Ms Luise Greve, 23, of Erlangen in Germany is among the travellers who bought the first flight that would get them to their loved ones' side as soon as the White House announced that travel would open on Nov 8 to fully vaccinated visitors from previously banned countries.

Singapore is not one of the 33 countries affected by the travel ban.

Under the new rules, fully vaccinated travellers will be allowed to enter the United States if they can show proof of Covid-19 vaccination and a negative coronavirus test taken within three calendar days of travel.

Unvaccinated Americans and children younger than 18 are exempt from the requirement but must take a coronavirus test within 24 hours of travel.

Ms Greve last saw her boyfriend in March 2020 - "just short of 600 days ago", she noted - when she visited him for three weeks in Sedalia, Missouri.

The pair met in early 2019 when they were randomly assigned to be part of the same castle-building "guild" in Lords Mobile, a cooperative game they play on their phones.

About a week before she flew back to Germany during their March 2020 visit, the US suspended most travel from Europe. As the pandemic dragged on, her boyfriend, who is 20, could have visited her in Germany. But his job did not offer vacation days, and he could not afford to quit.

Ms Greve, who is a university student, had been planning to use a workaround utilised by many frustrated travellers during the pandemic and enter the US after spending two weeks in Canada.

But before she could do that, the White House announced that it would be lifting the travel ban. Once officials announced the date, she secured a flight from Nuremberg and arrived, after several layovers, in Kansas City, Missouri.

Last Friday, ahead of her trip, she was excited but nervous. At check-in, she will have to show her proof of vaccination and a negative Covid-19 test result. She was not allowing herself to get her hopes up.

"I'm just worried things will go wrong because all through the pandemic, things went wrong," she said. "Once I'm in Kansas City, I can breathe again after 1½ years."

Ms Beatrice Fratini, 24, who lives about an hour from Venice, Italy, also expressed hesitation that her reunion with her American fiance would actually happen on Monday evening in Washington. The travel ban had traumatised her, she said.

"I'm excited, but I'm not going to believe it until I'm there," she said.

These long separations can put pressure on relationships, said Ms Giulia Polvara, who lives near Milan. Ms Polvara, 30, is travelling to the US on Saturday, the first day she has off work after the ban lifts.

Ms Polvara met her "special friend", as she is calling him, in December when she was visiting her sister in New York City. They spent one intense week together.

She was supposed to visit him in early March 2020, but then the Lombardy region, one of the parts of Europe hit hard by the coronavirus, was on lockdown, meaning she could not even leave her town near Lake Como to get to the airport.

By the time Italy loosened its restrictions on Lombardy, the US had banned most visitors from Europe.

"There is so much building up to this event," she said. "I'm very happy. I'm also scared of being underwhelmed or that he will be underwhelmed."

The man she is travelling to see could not come to Europe because he is an Iranian living in New York City, and he was waiting for the US to issue his green card. The same week that the ban was lifted, his green card was issued, she said.