Denver International Airport had the most domestic nonstop connections in the U.S. out of any airport in 2025.

The airport announced it ranked No. 1 in its domestic flight network this year, a first for DIA.

Denver beat Chicago’s O’Hare International Airport and Dallas-Fort Worth International Airport, which each had 195 domestic connections. DIA offers service to 197 destinations within the U.S.

There were several new expansions in 2025 that helped Denver grow its domestic network. Contour Airlines began operating at the airport in April and brought in four destinations new to Denver: Page, Ariz.; Taos, N.M.; Moab and Vernal, Utah.

In total, Denver added 12 new destinations this year.

Other locations include Butte, Mont.; Columbia, Mo.; Corpus Christi, Texas; Farmington, N.M.; Redding, Calif.; Stockton, Calif.; Wilmington, N.C. and Seattle’s Paine Field Airport. Denver also added more carrier options to 12 destinations it previously served.

The milestone comes as DIA celebrated its 30-year anniversary. The iconic tented-roof airport opened its doors in 1995.

The airport is also expanding its international options, offering 34 nonstop flights to 19 different countries.

Denver gained three new connections this year, from Punta Cana, Dominican Republic, Regina, Saskatchewan to the Italian capital of Rome.

Denver International Airport was named the third-busiest airport in the U.S. for the fourth year in a row in 2024, according to the Airports Council International. It also kept its ranking as the sixth-busiest airport in the world in 2024.

More than 82 million passengers went through the airport in 2024, up 5.8% from 2023.

Meanwhile, Chicago O’Hare is catching up to challenge Denver’s position in North America. Chicago jumped from the fifth-busiest airport on the continent in 2023 to the fourth, surpassing Los Angeles International Airport.

Chicago saw more than 80 million passengers and had a faster growth rate of 8.3% in 2024.

Throughout 2025, Denver saw a slowdown in the growth of passenger traffic compared to past years. Still, it saw several record-breaking months and days, the airport said.

From the beginning of the year until October — as data for all of 2025 is not available yet — Denver saw total passenger traffic grow 0.2% compared to the same period in 2024. International traffic grew by 5.4%. Six months broke passenger traffic records: January, June, July, August, September and October.

The busiest month in the airport’s history was July, when DIA had its first month with more than 8 million passengers.

The airport also had its biggest TSA security checkpoint date on July 6. The agency screened more than 97,000 people, another all-time record.