US airlines have been busy reshaping their transatlantic networks for 2027, with a wave of new nonstop routes that will deepen connections between American cities and a broad range of European destinations. From the Aegean coast to the Adriatic, the coming year promises more choice for travellers on both sides of the Atlantic.
Alaska Airlines: Seattle reaches Athens and Paris
Alaska Airlines is making its first foray into two European capitals. Starting 12 May 2027, the carrier will operate a thrice-weekly seasonal service from Seattle-Tacoma International Airport to Athens International Airport. Just under two weeks later, on 25 May, it will launch a five-times-weekly flight to Paris Charles de Gaulle. Both routes will run until October, catering to the peak summer travel period.
The Seattle-Athens link is particularly notable: it will be the only direct connection between the Pacific Northwest and the Greek capital, offering a gateway to the eastern Mediterranean. The Paris service, meanwhile, strengthens Seattle's position as a hub for European travel, complementing existing flights to London, Frankfurt and Amsterdam.
American Airlines: Philadelphia expands, JFK adds capacity
American Airlines has confirmed a substantial summer 2027 schedule from its Philadelphia hub, adding three destinations that have never been served nonstop from the city. From 28 March, Philadelphia will see its first-ever flights to Porto, Portugal, and a return to Reykjavik, Iceland, after a six-year hiatus. On 6 May, Vienna becomes the third new addition, making American the only US carrier flying directly to the Austrian capital.
Beyond Philadelphia, American is bolstering its New York presence with a new daily flight from JFK to Amsterdam (starting 28 March) and a fourth daily frequency to London Heathrow on the same date. Nice, on the French Riviera, will be served from JFK from 6 May, while Charlotte, North Carolina, gains a Barcelona route on 27 May. These additions reflect a strategy of tapping into secondary European markets while reinforcing core business corridors.
Delta: Austin gets its first Paris nonstop
Delta Air Lines will launch the first-ever nonstop service between Austin, Texas, and Paris Charles de Gaulle on 27 March 2027. The daily summer flight will be operated in partnership with Air France-KLM and Virgin Atlantic under their joint venture, allowing passengers to connect seamlessly to onward destinations across Europe.
During the peak season, the three carriers will collectively offer up to ten weekly nonstop flights between Austin and Europe, including services to Amsterdam. This marks a significant upgrade for the Texan capital, which has seen rapid growth in tech and business travel, and underscores the importance of the transatlantic market for Delta's network strategy.
United: record expansion with ten new European cities
United Airlines is undertaking the largest international expansion in its history, adding ten cities to its network in 2027. Among the new European routes are Washington Dulles to Toulouse, France, and Newark to a diverse set of destinations: Luxembourg, Marseille, Ibiza, Valencia, Terceira in the Azores, Ljubljana, Olbia in Sardinia, and Catania in Sicily. These routes will operate on a seasonal basis, with frequencies varying from three to five times weekly.
United is also strengthening existing links: from 28 May, it will add a thrice-weekly Washington Dulles-Milan service, and from 27 May, a daily Denver-Paris flight. The new routes are designed to capture demand from both leisure and business travellers, particularly to emerging tech hubs like Toulouse and Ljubljana, as well as popular Mediterranean holiday spots.
The expansion comes at a time when transatlantic travel is rebounding strongly, with airlines betting on sustained demand. For European cities, the new flights mean improved access to US markets, which could boost tourism and business ties. As rail connections within Europe also grow, the continent's transport network is becoming more integrated than ever.
While the focus is on 2027, the announcements also signal a broader trend: US carriers are increasingly looking beyond traditional hubs like London and Frankfurt to serve a wider array of European destinations. This diversification is likely to benefit smaller cities that have historically been underserved by direct transatlantic flights.
For travellers, the new routes offer more options and potentially lower fares, as competition intensifies on key corridors. Whether you're planning a summer getaway to the Greek islands or a business trip to the Austrian capital, the coming year will bring new ways to cross the Atlantic.
