Top 10 Longest Narrowbody Routes Between North America and Europe

Long-haul flights have traditionally been operated by widebody aircraft. However, advances in technology have changed that perception. Over the past few decades, aircraft manufacturers have developed new-generation narrowbodies with extended range and efficiency, which gives airlines more flexibility to serve long, thin routes that do not require the capacity of larger jets. The Airbus A321XLR, which has a published range of 4,700 nautical miles (8,700 kilometers), is a good example.

Indeed, airlines expect slightly lower real-world capability, but even so, it extends the reach of the A321neo family well into long-haul territory. That said, other narrowbody aircraft such as the A321neo, A320neo, Boeing 737 MAX 8 and MAX 9, and the Boeing 757-200, are also used on several routes, including many transatlantic routes. Today, airlines such as American Airlines, JetBlue, Icelandair, Air Canada, SAS, United Airlines, and Aer Lingus regularly deploy these single-aisle aircraft on routes between North America and Europe.

Key Long-Haul Narrowbody Routes Scheduled Through August 2026

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We took a look at scheduled data from aviation analytics provider Cirium for the period between November 2025 and August 2026, and airlines have planned more than 24,000 narrowbody flights between Europe and the US and Canada. Unsurprisingly, the Airbus A321neo family dominates this segment, accounting for over 15,000 of those flights. The longest narrowbody route in this period is Washington Dulles–Copenhagen, operated by Scandinavian Airlines (SAS) with the Airbus A321LR.

The route covers approximately 4,074 miles (6,556 kilometers). The A321LR is a long-range variant of the A321neo; it has a range of up to 4,000 nautical miles, which is roughly 4,600 miles. According to ch-aviation data, SAS operates three A321LRs and first deployed the type on the route back in 2022. It continues to use the aircraft on several US and Canadian routes. For the current winter season, the carrier operates four weekly flights on the Washington Dulles– Copenhagen sector.

The second-longest route is Toronto–Berlin, operated by Canadian leisure carrier Air Transat, also using the A321LR. The service covers roughly 4,052 miles and launched in June 2025 as a summer-seasonal route. The third-longest route is Newark–Milan Malpensa, which is operated by La Compagnie. The all-business-class carrier flies the A321LR between Newark and Milan, as well as to Nice and Paris Orly. La Compagnie currently operates two A321LRs and has two additional aircraft on order.

A Closer Look At United’s Expanding 757 Network To Europe

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As seen in the table above, most of the longest narrowbody routes between North America and Europe are operated by the A321neo family. However, one notable exception is United Airlines’ Newark–Stockholm service, which is flown by the Boeing 757-200. It is currently the longest 757 route in the world (at least through August 2026). The 757 is one of the most capable long-range narrowbodies ever built. It entered service in 1983 and quickly became a favorite among legacy carriers for its ability to operate both long domestic sectors and select transatlantic flights. Boeing ended production of the 757 over two decades ago, but did not offer a direct replacement.

This meant there was effectively no other single-aisle aircraft combining similar range and performance until the arrival of the A321LR. Indeed, United has a long history with the 757-200, much of it inherited from Continental. The airline continues to operate around 40 of these aircraft, with an average age of 28.8 years. Notably, as previously analyzed by Simple Flying, the carrier has scheduled more 757 flights to Europe for the peak of summer 2026 than in any year since 2017. This includes the launch of Washington Dulles–Keflavik on May 22. According to United’s current schedule, the carrier has planned fifteen 757 transatlantic city pairs at the peak of next summer.

Across the period through next August, more than 2,501 United 757 flights to Europe are scheduled, representing a 4.4% increase year-over-year and roughly 46% more than pre-pandemic levels. Beyond United, other carriers continue to rely on the 757 as well. Icelandair, which operates a fleet of around ten 757-200s, has scheduled more than 200 flights between Denver and Reykjavik through next August. Similarly, Delta Air Lines is also deploying the aircraft on its Detroit–Keflavik route, with approximately 114 one-way flights planned over the same period.

Icelandair Leads 737 MAX Deployments Across The Atlantic

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Besides, several airlines continue to use the Boeing 737 MAX for transatlantic flying. WestJet, Air Canada, United, and Icelandair all deploy the type across the North Atlantic, although Icelandair remains by far the largest operator in this category. According to Cirium data through August next year, the Icelandic carrier has scheduled more than 4,800 narrowbody flights between North America and Europe, of which 3,505 will be operated by its 737 MAX 8s and MAX 9s. The airline currently flies 17 MAX 8s and four MAX 9s. Simple Flying readers might recall that the carrier has made some notable changes in narrowbody deployment next year, particularly with the A321LR.

One of the shifts involves its Seattle–Keflavik route. This past summer, Icelandair operated the route up to three times daily, primarily using the A321LR between June and August. That said, earlier this year, the airline also deployed the 757-200, 767-300ER, and MAX 8. From May 21 next year, however, every Seattle–Keflavik flight will switch to the 160-seat 737 MAX 8. This is due to the competitive dynamics rather than reduced demand. Icelandair’s codeshare partner, Alaska Airlines, will launch the same route next year, and total market capacity will increase by around 10%. So, maintaining three daily A321LR would create significantly higher capacity and could pressure yields.

Even with the switch, Seattle–Keflavik will remain Icelandair’s largest MAX 8 deployment across the Atlantic and, at roughly 3,622 miles, it will be the longest 737 MAX 8 route scheduled through August 2026. Furthermore, Icelandair also continues to use the 737 MAX 9 on several transatlantic routes. At present, the aircraft is deployed to Toronto, New York JFK (until the end of this year), and Newark. Looking into 2026, the airline plans to keep the MAX 9 on select services and add further deployments, including Nashville, Baltimore, Toronto, Chicago, and Newark, based on its current schedule.