The distance between Chengdu and Xi'an varies depending on the mode of transport, with the straight-line aerial distance measuring approximately 622 to 623 kilometers (387 miles). For those traveling by road, the distance is roughly 713 to 743 kilometers (443 to 462 miles), a journey that typically takes between 7 and 12 hours depending on traffic and the specific route. However, the most popular and efficient way to bridge the gap is via the high-speed rail network, which covers a running distance of approximately 658 kilometers (409 miles). Since the opening of the Xi'an-Chengdu High-Speed Railway in late 2017, travel time between these two provincial capitals has been drastically reduced to just 3 to 4.5 hours, making a day trip feasible. Alternatively, while direct flights take about 75 to 90 minutes, they are often considered less efficient than the bullet train when factoring in airport transfers and potential delays.