Covid testing is a popular option for travelers who are planning to travel on holiday. However, there are long wait times and lengthy lines for the results.

On Tuesday, the covid testing lines of some New York walk-in clinics were closed. At-home testing was not available in pharmacies. Walgreens restricted their purchases of at home tests four per customer. CVS HealthLimit them to 6 per person

XpresCheck provides testing at many major U.S. airports. Doug Satzman, the CEO, of the parent company said that while it is not running out, the agency has exceeded its capacity for appointments during some times. XpresSpaThis is what I said via e-mail.

Tuesday’s White House announcement stated that the government would buy 500 million Covid testing kits, which can be ordered online free of charge. The program will begin in January. The testing crisis is already disrupting holiday plans.

Britt Groosman is an economist who works as a program manager for the Environmental Defense Fund. Her family cancelled their Christmas trip to visit relatives in Belgium, the U.K. and because it was difficult to get test results. She said that it would have been the first holiday they had spent there for two years.

Groosman from New York City said because of the spread of omircron, she would not feel at home visiting her elderly parents if she had taken a 48 hour test.

Groosman did a PCR test on Saturday, but she hadn’t yet received her results on Tuesday. An American AirlinesShe was told by a representative that she would receive a credit from the carrier for roughly $4,000 she had paid for four tickets.

Omicron quickly became the predominant variant of sequential Covid cases. However, many travelers remain loyal to their vacation plans, regardless of the wide spread.

On Tuesday, 1.98 Million people were screened by the Transportation Security Administration. This was the longest period of screening since Thanksgiving Week. UnitedAnd Delta are expecting their busiest days since the beginning of the pandemic during the year-end holiday period — though still shy of 2019 levels.

Delta reported that they expect to fly 7.8 millions passengers in December 17-January 3, which is about 16% more than prior to the pandemic. However, these are the busiest days during the crisis.

United said it last week expects to carryThere were 420,000 passengers per day from Dec. 16 to Jan. 3. This is an increase of about 400,000 for Thanksgiving but a decrease of around 13% from two-years ago.

Scott Kirby from United stated that the greatest impact will be on international travel. The travel restrictions on the United Kingdom have rapidly changed since last month’s first detection. This includes the U.S. where visitors and residents alike must show proof of negative Covid tests within one day.

Kirby told “Good Morning America” that demand had not fallen in America’s domestic market. Kirby spoke to the media on Monday. Internationally, the demand has dropped quite significantly due to international borders closing and lockdowns. The story is actually about two cities.”

–CNBC’s Spencer KimballContributed to the report.