In 2025, an average scheduled passenger flight from the US to Europe will go 3,704 nautical miles (6,860 km). Cirium Diio data was used to analyze all airlines, routes, and flights from January to October.
The shortest airport pair is Boston-Terceira, measuring 1,998 nautical miles (3,700 km). It is served weekly on Azores Airlines’ A321neos throughout the year. So, what about the longest routes?
The top ten longest routes connecting the United States and Europe
The table below summarizes them. They are especially concerned with the European periphery and the United States’ West Coast. Turkish Airlines remains the top market between Istanbul Airport and Los Angeles, with a record 17 weekly flights this summer. More about this later.
Given that Air France’s Nice-Los Angeles service only has one roundtrip this year, it appears unfair to include it at the expense of a regular service. Level’s Barcelona-Los Angeles link would have made the cut even if it had not been included.
| Nautical miles | Max. block time* | Route | Airline | Comments (details may change) |
|---|---|---|---|---|
| 5,953 | 14h 10m | Istanbul-Los Angeles | Turkish Airlines | Double daily through June (12 weekly in February), but record 17 weekly from July to October. 777-300ER/787-9/A350-900 |
| 5,826 | 14h 00m | Istanbul-San Francisco | Turkish Airlines | 10 to 11 weekly, increasing to 12 weekly from June. A350-900/777-300ER/787-9 |
| 5,536 | 13h 35m | Istanbul-Houston Intercontinental | Turkish Airlines | 10 weekly (daily in February). 787-9/777-300ER |
| 5,521 | 13h 15m | Rome Fiumicino-Los Angeles | ITA Airways, Norse Atlantic | Norse begins in April (five weekly 787-9). ITA: returns in March, when it’ll be five weekly. Rises to six weekly and then daily June-October. A350-900/A330neo |
| 5,453 | 13h 20m | Istanbul-Dallas/Fort Worth | Turkish Airlines | Primarily nine weekly (daily in February), but 10 weekly from June. 787-9 |
| 5,443 | 13h 05m | Rome Fiumicino-San Francisco | ITA Airways, United | Both carriers began flights in May 2023. ITA: weekly in January, rising to three weekly and then daily June-September. United: returns on March 29; daily 777-200ER |
| 5,332 | 12h 10m | Vienna-Los Angeles | Austrian | Returns on April 29; daily but four times weekly in September/October. 777-200ER |
| 5,326 | 13h 10m | Istanbul-Denver | Turkish Airlines | Began in June 2024 and is Denver’s longest route. Three/four weekly but daily from June. Aside from the 787-9 in February, it’s all-A350-900 |
| 5,292 | 12h 00m | Nice-Los Angeles | Air France | May 12 to Los Angeles and May 26 back. For the Cannes Film Festival and Monaco F1 Grand Prix. A350-900 |
| 5,276 | 12h 45m | Istanbul-Seattle | Turkish Airlines | Began in May 2022. Mainly daily (five weekly in February) but record 10 weekly from June to October. A350-900/787-9 |
| * Either direction |
Turkish Airlines to Los Angeles: 17 weekly flights
The Star Alliance member has been serving Los Angeles since March 2011. According to data from the US Department of Transportation, about 3.2 million passengers were transported till September 2024.
It has filed for an average of 83% of seats. However, it was 86% in the first nine months of last year, but dropped to 78% in February. As a result, it is unsurprising that February will have the lowest frequency, lowering capacity while also assisting with loads, fares, and yields.
While Los Angeles flights have never exceeded double daily, they will increase to 17 weekly in July for peak season. The schedule is as follows, and all timings are local:
- Istanbul-Los Angeles: 8:00-11:45 (777-300ER/787-9; daily), 14:00-17:55 (777-300ER; daily), 18:35-22:20 (787-9; three times weekly).
- Los Angeles to Istanbul: 00:05-23:20 (787-9; three times weekly), 13:40-12:55+1 (777-300ER/787-9; daily), 19:50-19:05+1 (777-300ER; daily)
What are the ten longest transatlantic flights in 2025?
The longest transatlantic flights in 2025 include routes between major US cities and Europe, with durations of up to 14 hours and 10 minutes.
Which US cities are part of these longest transatlantic flights?
US cities like Los Angeles, San Francisco, and Miami feature prominently in these long-haul flights to Europe.
What European destinations are included in these longest flights?
European destinations include cities such as Istanbul, Athens, and Frankfurt, which are popular hubs for long-haul flights.
What airlines operate these long transatlantic flights?
Major airlines like Delta, United, and Turkish Airlines operate these routes, offering nonstop services across the Atlantic.
How can passengers prepare for long transatlantic flights?
Passengers can prepare by staying hydrated, bringing entertainment, choosing comfortable seating, and packing essentials like snacks and a travel pillow.