Delta Air Lines announced last month it broke its own record, flying more passengers in June than any month in its history. The airline seated 17.7 million passengers on mainline and Delta Connection flights around the world.

“We’ve made a commitment to our customers to be a reliability leader, delivering a safe, on-time product and the 80,000 employees of Delta are doing just that,” said Dave Holtz, senior vice president — operations and customer center, Delta. “We’re seeing customers fly Delta in record numbers this summer and it’s a resounding testament to the hard work and focus of our employees.”

The airline is reaping the financial benefits of increased traffic, too. It had its best quarter ever April through June, with more than 50 million passengers in that time. The airline’s best day on record was June 30, 2017, when the airline flew 646,000 customers.

But June 2018 was a blockbuster month, with six of the airline’s top 10 passenger days ever. Even soaring fuel prices, passed down to customers through hiked fares, isn’t affecting the bottom line.