Transatlantic airfares have dropped to rates last seen before the pandemic, data shows, the latest sign that fewer Europeans are traveling to the U.S. due to concerns about U.S. border controls and Donald Trump’s policies.

The trend could extend into and beyond the summer holiday period, typically the busiest time for airlines and travel companies.

Overseas arrivals to the United States fell 2.8% in May from a year ago, according to preliminary data from the U.S. National Travel and Tourism Office within the U.S. Department of Commerce. Travel from Western Europe fell 4.4% in May, led by a decline in travelers from Denmark and Germany.