Airbnb shares fell 5 per cent in extended trading after the company forecast a decline in quarterly bookings compared with pre-pandemic levels, citing the spread of the Delta variant of Covid-19. The home-rental company said the number of nights and experiences booked in the third quarter will fall short of the total during the same period in 2019. The disclosure on Thursday amplified fears from investors that the latest outbreak will weigh heavily on the travel industry. Booking Holdings and Expedia Group issued similar warnings about the impact of the Delta variant during their financial reports this month. All three reported otherwise outstanding quarters. Airbnb blitzed past expectations for second-quarter bookings and gave a surprisingly positive revenue outlook for the current period, indicating the expected decline in total bookings won’t hamper sales. The San Francisco-based company reported a second-quarter gross bookings value of $13.4 billion, a 37 per cent increase from pre-pandemic levels in 2019. Analysts had predicted $11.2bn on average, according to data compiled by Bloomberg. Quarterly revenue came in at $1.34bn for the three months that ended June 30, a 10 per cent gain from the same period in 2019. “The travel rebound is upon us, and Airbnb is leading the way,” the company, which went public in December, wrote in a letter to shareholders published with the results. “In the last few weeks, we had our biggest night ever in the US and our biggest night globally since the pandemic began, with more than 4 million guests staying at an Airbnb listing.” While Airbnb has benefited from a US domestic travel boom linked to rising vaccination rates and easing restrictions, international sales remain stifled, and the Delta variant has raised further doubts for the future. “We anticipate that the impact of Covid-19 and the introduction and spread of new variants of the virus, including the Delta variant, will continue to affect overall travel behaviour,” the company said. However, it added a positive outlook for the current period, predicting the “strongest quarterly revenue on record”. Chief executive Brian Chesky said the pandemic had forced the home-share company to become “much more disciplined and much more efficient”. Covid-19 will leave “indelible marks” on Airbnb, Mr Chesky said during a conference call. “When we started Airbnb, stays of longer than a month wasn’t a major part of the business,” he said. Now, long-term stays of 28 days or more were the fastest-growing category by trip length. That’s “not even traveling, it’s living”, Mr Chesky said. The travel industry has been gutted by the coronavirus pandemic, which caused most of the world’s tourism hotspots to shut down last year. Airbnb fared better than rivals due to the remote work movement, where city dwellers abandoned their apartments for extended stays in rental homes near beach towns and mountain villages. The home-rental company saw bookings plunge 80 per cent last March, but they quickly bounced back by the summer. Short-term rentals were the fastest-growing part of the online travel industry even before Covid-19. Over the past 18 months, they’ve largely kept the sector afloat. Almost 30 cents of every dollar spent in hospitality today is going towards short-term rentals, according to an analysis of data compiled by researchers AirDNA and STR. The increase in demand has led to a heightened rivalry between the world’s biggest online travel companies. Booking and Expedia have been aggressively courting landlords in the US, particularly those who list on Airbnb. “There’s been some recent concern about whether Airbnb is reaching a point of maturation and whether they can continue the supply growth they’ve seen,” Dan Wasiolek, an analyst at Morningstar Investment Service, said before the results were published. Airbnb reported the number of active listings grew in the second quarter. “We’re seeing the strongest supply increases in the areas with the greatest guest demand,” the company said. Despite the doubts raised by Delta, Airbnb saw an almost 200 per cent surge in nights and experiences booked, which includes all stays and tourist activities sold on the platform. The company reported 83.1 million total bookings for the quarter, topping the average analyst estimate of 77.5 million. Airbnb reported adjusted earnings before interest, tax and other expenses of $217 million, well above analyst predictions of $50.4m. The company reported a loss of 11 cents a share. Analysts were expecting a wider loss of 41 cents.