It’s that time of year again. Leaves are changing colors, shoulder season trips are in full swing, and international airlines are sharing what new routes travelers can expect next summer.

Earlier this month, American Airlines announced plans to add five transatlantic flight paths to its roster. Not to be left out, Delta Air Lines recently divulged that its sunny-season calendar will include seven new routes, one new destination—Catania on the island of Sicily—and expanded service to some of its most popular destinations in Europe.

This will be Delta’s “largest-ever” summer schedule, with 700 weekly flights, according to the airline. Here’s everything you need to know about Delta’s summer 2025 calendar.

This summer saw record numbers of travelers in Europe. And even if residents continue to protest tourists’ presence, airlines are betting they’re still going to make the journey across the pond. More specifically, Delta is wagering they’ll want to experience la dolce vita—of its seven new Europe routes for 2025, four are to Italy. In a press release, the carrier said it is now the largest U.S. carrier in the Italian market.

New Routes for Summer 2025

The new routes for summer 2025 are:

• New York-JFK to Catania, Sicily: Delta is the first U.S. airline to offer direct flights to Catania, Sicily. Delta will begin daily service to Catania on May 2025.
• Atlanta to Naples: Delta will launch four-times-weekly service from Atlanta to Naples starting in May 2025. This route will complement Delta’s existing New York-JFK to Naples service, launched in summer 2024, adding more opportunities for customers to explore southern Italy’s picturesque charm.
• Minneapolis-St. Paul to Rome: Delta is adding four weekly flights from Minneapolis-St. Paul to Rome starting in May 2025, linking its second-largest hub to one of the most sought-after European destinations. With MSP joining Atlanta, Boston, Detroit, and New York-JFK, Delta will offer direct service to Rome from five U.S. hubs, further enhancing access to the Eternal City.
• Boston to Milan: For travelers drawn to Milan’s elegance, Delta will launch four weekly flights from Boston to Milan in May 2025, filling a crucial gap as Boston’s largest unserved European market. This route complements Delta’s existing Milan service from New York-JFK and Atlanta.
• Boston to Barcelona: Starting May 2025, Delta will introduce three-times-weekly service from Boston to Barcelona, offering customers the chance to discover the city’s iconic architecture, vibrant arts scene, and beautiful coastal views. This service complements Delta’s current routes from Atlanta and New York-JFK.
• Detroit to Dublin: In May 2025, Delta will begin four-times-weekly service from Detroit to Dublin, unlocking even more opportunities for customers to explore Ireland’s scenic landscapes and vibrant culture. This new route will complement existing Dublin service from Atlanta, Boston, New York-JFK, and Minneapolis St. Paul.
• Atlanta to Brussels: Delta is introducing new three-times-weekly nonstop service from Atlanta to Brussels, providing a convenient connection between the U.S. and Belgium’s vibrant capital. Known for its rich history, world-class museums, and role as the center of the European Union, Brussels is now even more accessible. This route complements Delta’s existing service from New York-JFK, further enhancing access to this important European city.

Increased Service to Popular Destinations

In addition to the new routes, Delta is beefing up its connections to old favorites, including:

• Atlanta to Athens: Delta continues to expand its trans-Atlantic offerings from Atlanta, adding more options for travelers to explore Europe. With four additional weekly flights to Athens, bringing the total to 11, Delta strengthens its position as the leading U.S. airline to Greece.
• Atlanta to Barcelona: Travelers can also enjoy three extra weekly flights to both Barcelona and Rome, for a total of 10 and 17 respectively, or opt for daily service to Zurich for the ultimate Swiss escape.
• Atlanta to Rome: Travelers can also enjoy three extra weekly flights to both Barcelona and Rome, for a total of 10 and 17 respectively, or opt for daily service to Zurich for the ultimate Swiss escape.
• Atlanta to Zurich: Travelers can also enjoy three extra weekly flights to both Barcelona and Rome, for a total of 10 and 17 respectively, or opt for daily service to Zurich for the ultimate Swiss escape.
• Detroit to Munich: In Detroit, Delta is increasing its service to Munich to daily flights, making it easier for travelers to explore the heart of Bavaria.

A Look Inside the Decision-Making Process

Two Delta Network Planning team members provide an inside look at some of the decisions that shape where and when customers can fly.

What Makes Delta’s Summer 2025 Schedule Special?

Delta’s summer 2025 schedule offers an unprecedented level of connectivity and comfort for travelers. Here are some of the key highlights:

New Routes to Exciting Destinations: Delta is adding new service to Catania, Sicily, the first U.S. airline to offer direct flights to this historic and culturally rich destination. The airline is also expanding its presence in popular European cities like Dublin, Barcelona, and Brussels.

Increased Service to Beloved Destinations: Delta is boosting its service to Italy, offering more flights than ever before to popular destinations like Rome, Milan, and Naples. The airline is also increasing service to Greece, Switzerland, and Germany.

Enhanced Travel Experience: Delta is introducing its new Delta One Lounges, offering a luxurious and exclusive setting for premium travelers. The airline is also rolling out free international Wi-Fi and increasing premium seating across its fleet, ensuring customers enjoy the best in connectivity and comfort from the moment they arrive at the airport to when they touch down.

What Makes Delta’s Summer 2025 Schedule Special?

An increased number of trans-Atlantic flights will be operated by Delta’s state-of-the-art A330-900 and A350-900 aircraft, featuring Delta One suites, Delta Premium Select, Delta Comfort+, and Main Cabin options.

Delta One customers can enjoy lie-flat seats with premium bedding made from recycled materials, along with a seasonal, chef-curated four-course dining experience. Additionally, thanks to a recently announced partnership with Italian luxury fashion house Missoni, Delta One customers can look forward to a new customer amenity kit and top-of-the-line details woven into key touchpoints throughout the Delta One travel experience.

Delta Premium Select offers extra room to relax with wider seats, deeper recline, and enhanced service. Passengers in all cabins will enjoy curated food and beverage options and access to over 1,000 hours of entertainment through Delta Studio.

Plus, Delta is bringing fast, free Wi-Fi presented by T-Mobile to international flights. Available on 90% of domestic routes today, the airline has started rolling out streaming-quality connectivity to SkyMiles Members on select long-haul international routes. Transatlantic flights are coming online on a route-by-route basis as service is available, and the entire global fleet is expected to be retrofitted with free Wi-Fi by the end of next year. Delta is also enhancing the pre-flight experience with the opening of its new Delta One Lounges. Following the launch of the JFK lounge, new lounges at LAX, BOS, and SEA will offer an exclusive and luxurious setting for Delta One and other eligible customers before embarking on their next summer adventure.

Booking Your Summer Vacation

Customers ready to book their summer vacation can make planning seamless with Delta Vacations, with flights, and expert recommended hotels, rides and activities booked all-in-one place. With Delta Vacations, SkyMiles Members enjoy exclusive benefits, such as earning Medallion Qualification Dollars (MQD) toward Medallion Status not only on their flight but also on the hotel, car rental, and activity portions of their trip. Plus, Members can earn up to 10,000 bonus miles per person on top of flight miles and even use miles to cover part or all their vacation costs. For those who have already booked a Delta flight, SkyMiles Members can still take advantage of earning 2x miles per $1 spent (excluding taxes and fees, additional terms apply) when booking hotels, vacation rentals, or car rentals through Delta Stays and Car Rentals.

What They’re Saying About Delta’s Summer 2025 Schedule

Georgia Department of Economic Development Commissioner Pat Wilson said, “Georgia’s position as the No. 1 state for business is supported by our globally recognized aviation industry and the connectivity that comes with being home to both the world’s busiest airport and Delta Air Lines. Italy is a top trading partner with significant investments in the Peach State. Building from our recent economic development mission to Italy, this new direct service between Atlanta and Naples is a welcome addition that will further strengthen Georgia’s longstanding bilateral partnerships.”

Port Authority of New York and New Jersey Aviation Director Charles R. Everett Jr., said, “We are thrilled to welcome Delta Air Lines’ new service to Catania, unlocking another exciting, in-demand destination while further cementing John F. Kennedy International Airport’s status as the premier international gateway in the United States. As we continue our unprecedented $19 billion redevelopment of JFK, Delta’s expansion is another key step in our commitment to offer passengers world-class travel options alongside a world-class airport experience.”

Massport’s Director of Aviation Ed Freni said, “Delta has been an excellent partner to Logan for many years and we are thrilled about their new routes to Milan and Barcelona as part of their trans-Atlantic expansion in summer 2025. These new services will provide our passengers with more travel opportunities and further strengthen our ties between New England and the many regions of Europe.”

Wayne County Airport Authority CEO Chad Newton said, “We’re always looking to take Detroit to the world and Delta's 2025 summer schedule will provide our passengers with even more opportunities for international travel. More than one million people with Irish heritage call Michigan home and we expect this first-ever DTW to Dublin route will be in high-demand.”

Metropolitan Airports Commission CEO and Executive Director Brian Ryks said, “We appreciate Delta’s continued commitment to MSP with the newest international non-stop route to Rome. Rome has been our top unserved European market, and this addition complements Delta’s robust existing service to Europe from MSP. It also provides Minnesota travelers with another prominent in-demand destination during the peak travel season.”

For more information about Delta’s trans-Atlantic schedule and to book your flights, please visit our website: delta.com.

Delta’s Commitment to Connectivity and Comfort

Delta’s summer 2025 schedule is a testament to the airline’s commitment to providing travelers with the best possible travel experience. With new routes, increased service, and a focus on comfort and connectivity, Delta is making it easier than ever to explore Europe’s most captivating destinations.