Taylor Swift fans are causing a spike in European air travel surrounding the Eras Tour

By Jordan Valinsky, CNNAir travellers, are you ready for it? Euro summer is going to get even busier, thanks in part to Taylor Swift.United Airlines revealed that demand for flights to Lisbon, Portugal, where Swift is performing for her Eras Tour, shot up 25 per cent for this weekend compared to last summer — and the surge is going to continue for the next few months as fans flock to Europe to for concert tickets that are thousands of dollars cheaper compared to the US.Bookings to other European cities where she's performing in the coming weeks, including Madrid, Edinburgh and Dublin, are also surging, a United representative told CNN.READ MORE: The most in-demand cruise destinations for Aussies in 2024United's flights to Milan and Munich for Swift's shows in July have captured the biggest increase in demand – upwards of 45 per cent more passengers compared to last year.Delta Air Lines told CNN demand is on the rise for flights to her European tour. The airline said it is prepared as it flies its largest-ever international summer schedule by adding destinations and restoring routes that were cut because of the pandemic.Both airlines are bracing for record-breaking summer travel overall. Delta and United said it will fly nearly 3 million people during Memorial Day weekend, lasting from Thursday to next Monday, a 5 per cent increase from last year.Airlines for America, a group representing major US airlines, predicts record numbers of passengers this summer, with carriers expected to fly 270 million passengers — up 6 per cent from last year.READ MORE: Best time to visit Bali'Swiftonomics' meets travelThe increase in bookings is just another example of "Swiftonomics," the pop icon's ability to influence the economies of the cities and countries that she visits on her mammoth global tour.More than 1 million Swifties will attend the superstar's shows in the United Kingdom later this summer, with the typical fan expected to spend £642 ($1224) on travel, accommodation and other expenses, injecting a total of £755 million ($1.4b) into the economy, according to a recent Barclays report."When it comes to cultural icons like Taylor Swift — like we saw with Elvis and Beatlemania in the 50s and 60s — supporters have such a strong connection to the artist and to the rest of the fandom that the desire to spend becomes even more powerful," Dr. Peter Brooks, chief behavioural scientist at Barclays, said in the report.-CNN's Anna Cooban contributed to this report.