Atlanta-based Delta Air Lines looks to have trimmed operations at several US and international airports this year, to match continued fluctuating passenger demand and optimize the airline’s operations and profitability. Airlines continue to evaluate and cut underperforming routes to support fleet availability.

Using data from Cirium, an online aviation analytics company, let’s crunch the numbers and look at where the SkyTeam partner has trimmed its schedule by more than 1%, and the airports identified may surprise you. While the majority of this analysis will look at domestic airports, three long-haul international markets are worth mentioning, which include Dublin (-11%), Rome (-12%), and Seoul (-10%), which all see a visible drop in flights for the first half of 2026.

121 Airports With More Than A 1% Drop

Airports primarily located across the United States, with a handful of short-haul international destinations, will see a shift of more than 1% fewer flights operated by Delta Air Lines in the first half of 2026. Whether this is a reduction in the number of daily or weekly flights, or the dropping of unprofitable routes, it will see these airports experience less of a Delta presence this year. All 121 airports are detailed on the map below.

By percentage of decrease, the top three airports feeling the biggest hit will be Colorado Springs, Williston Basin, and Providenciales, followed by St. Thomas (-25%), Bozeman (-24.4%), and Central Illinois (-24.1%).

Understanding Those With The Biggest Drop

Colorado Springs is forecasted to see the biggest drop with 32% less flights when compared to the same half of 2025. In the first half of 2026, 217 fewer flights are scheduled, representing around eight a week. According to the Bureau of Transportation Statistics, Delta operates just 5% of all flights to and from the airport, quite a gap between the airport’s leading airline, Southwest Airlines (with more than half of all operations).

Williston Basin International Airport, serving the sixth largest city in North Dakota (Williston), is the second biggest airport to feel the pinch, with a forecasted 28.7% less flights scheduled in 1H of 2026. The drop of 148 flights total is more than five per week. Current Delta operations at these top three airports are noted in the table below.

The primary gateway into the Turks and Caicos Islands, Providenciales International Airport, is the leading international airport that will see the biggest drop in Delta services by % measured. Delta is set to drop 26.6% of flights to and from the airport, a drop of 146 in the first half of the year, representing an average of five weekly flights.

Leading The Pack For Growth

On the flipside, the top three markets with the biggest increase in Delta services this first half of 2026 include Great Falls (+32%), Sao Paulo (+28%), and Montego Bay (+28%). All three of these airports will reap the rewards of more DL flights in the first half of 2026.

Great Falls International Airport (GTF), serving Cascade County, Montana, will see the highest growth by a 32.7% increase in flights, with 702 total services scheduled in the first half of the year. This is an increase of 173 compared to the same time last year, or six additional flights weekly. Delta operates to Great Falls through its subsidiary Delta Connection with non-stop services to Salt Lake City.

São Paulo/Guarulhos–Governor André Franco Montoro International Airport (GRU) is the largest international market to gain more Delta flights, with an increase 28.8% or 129 more flights overall in the first half, an average of four to five additional flights per week. Delta operates to GRU non-stop from Atlanta and New York JFK Airport.

Finally, rounding out the top three is Sangster International Airport (MBJ), serving the Jamaican city of Montego Bay. Delta will increase its presence in the first half by 28.4%, 250 flights, or an average of over nine flights weekly. Delta offers non-stop flights to MBJ year-round from Atlanta and New York JFK, with seasonal services added from Boston, Detroit, and Minneapolis/St. Paul.