The United States is one of the world’s largest countries, and it’s the world’s largest aviation market. This means that there’s no shortage of demand for long routes connecting distant corners of the country, with flights within the continental US pushing six hours in some cases, longer than some transatlantic routes. In addition, there’s robust demand for services to the state of Alaska, which is physically separated from the US, and flights to the ‘Last Frontier’ can exceed seven hours.

Then, however, there are flights to Hawaii, which is separated from the continental US by the Pacific Ocean. As such, even services between Hawaii and the US West Coast can exceed five hours. Because Hawaii is an incredibly popular tourist destination for Americans, it also receives services from all across the United States, even as far as the US East Coast. Let’s examine data from Cirium, an aviation analytics company, to establish the US’s longest domestic flights in 2026.

5

Atlanta – Honolulu

3,912 nautical miles (7,246 km)

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Hartsfield-Jackson Atlanta International Airport (ATL) is the world’s busiest airport, in part because it’s the primary hub for Delta Air Lines. Delta essentially flies everywhere from Atlanta, including most European cities, destinations as far south as Johannesburg, as far east as Seoul, and virtually everywhere within the United States. Delta’s longest domestic route from Atlanta is its nonstop service to Honolulu Daniel K. Inouye International Airport, at 3,912 nautical miles (7,246 km), and is blocked for over ten hours when headed west.

Delta operates daily flights year-round with the Airbus A330-300, a plane that it configures with 34 DeltaOne seats, 21 Delta Premium Select seats, 24 Delta Comfort seats, and 203 Delta Main seats, for a total capacity of 282 passengers. In addition, Delta operates a second daily flight on this route during the winter season, when demand to Hawaii is generally higher. During the upcoming winter season, this flight will run from December 19, 2026, to January 4, 2027, and will primarily use the Boeing 767-300ER.

This is the busiest route on this list, as it’s the only one to have more than one daily flight. Delta can support such a high level of flights due to the size of its hub in Atlanta, which has strong local demand as well as excellent geography for connections. Its competitors also have strong service to Hawaii from their largest hubs, that being Dallas/Fort Worth in the case of American Airlines and Chicago O’Hare in the case of United Airlines. In addition to the Honolulu flight, Delta also connects Atlanta with Kahului, which is shorter than the route to Honolulu.

4

Washington DC – Honolulu

4,186 nautical miles (7,752 km)

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Before United Airlines inherited a massive operation out of Newark Liberty International Airport (EWR), courtesy of its 2010 merger with Continental Airlines, its easternmost hub was in Washington Dulles International Airport (IAD). This was its primary transatlantic hub and was its main airport serving the Northeast, the most densely populated region in the United States. As such, it remains a critical component of United’s network, even if it’s frequently overshadowed by Newark.

In 2012, United Airlines launched nonstop flights from Washington Dulles to Honolulu. In 2026, its service is rather irregular, as it is operating six times per week as of the time of writing, a frequency that will last until April 11. Service will then be suspended for three weeks and will resume on May 2, operating on Saturdays only. On June 25, flights will begin operating daily until August 10, after which service will be cut to Saturdays only. This will continue until December 17, when flights will begin operating daily again.

In total, United Airlines will operate 137 flights each way between Washington Dulles and Honolulu. It will use the Boeing 767-400ER, configured to seat 231 passengers in United’s layout. This consists of 34 Polaris seats, 24 Premium Plus seats, 48 Economy Plus seats, and 125 economy seats. This is one of United’s least-premium aircraft, as the carrier tends to have the largest business class cabins of the three US legacy carriers, which makes the 767-400ER a good fit for Hawaii, which is traditionally low-yielding.

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3

Newark – Honolulu

4,312 nautical miles (7,986 km)

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United Airlines’ Boeing 767-400ER fleet was inherited from Continental Airlines. Continental primarily ordered the 767-400ER as a replacement for its aging McDonnell Douglas DC-10 fleet, and as such, it took over many DC-10 routes. This included Continental’s nonstop route from Newark Liberty International Airport to Honolulu Daniel K. Inouye International Airport, one of the longest routes using the Boeing 767-400ER in the world. Although Continental no longer exists, United Airlines continues to operate this route with the 767-400ER.

Similar to the Washington Dulles route, United only operates the route from Newark to Honolulu for only part of the year. United will not fly this route from April 11 to November 20. Beginning November 20, United will fly this route five times per week, and starting from December 17, the route will operate daily. It will remain daily throughout the rest of the year, and in January 2027, it will be cut slightly to six flights per week, where it will remain until being cut again in April.

Apart from service disruptions during the COVID-19 pandemic and a brief period afterwards when United assigned the 767-300ER and 777 to this route, the Boeing 767-400ER has continuously operated this route for over 20 years. Continental Airlines formerly maintained a high-density 255-seat layout for its 767-400ERs that were dedicated to domestic and Hawaiian flights, but the route from Newark always used international 235-seat 767-400ERs. This was primarily because the planes rotated from European services.

2

New York – Honolulu

4,330 nautical miles (8,020 km)

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Whereas Newark is a United fortress hub and was historically a Continental Airlines fortress hub, New York-JFK Airport is more competitive. In addition, JFK tends to be preferred by passengers traveling to the New York area and is heavily used by New Yorkers traveling on long-haul flights. This is why Hawaiian Airlines, based in Honolulu, serves the New York area via JFK Airport. It operates this route year-round using an Airbus A330-200.

More recently, Hawaiian Airlines has had to compete against Delta Air Lines on this route. The carrier uses the Boeing 767-300ER, and is currently operating this route five times per week. However, beginning April 1, the Atlanta-based carrier will increase service to daily, providing stiffer competition against Hawaiian Airlines, which had been struggling leading up to its acquisition by Alaska Airlines. This change is also coming as part of a general increase in service to the Hawaiian Islands from almost all of its hubs.

Hawaiian Airlines configures its Airbus A330-200s with 278 seats: 18 first class seats, 68 Extra Comfort seats, and 192 economy seats. In contrast, Delta has just 216 seats on its 767-300ERs: 26 DeltaOne seats, 18 Delta Premium Select seats, 21 Delta Comfort seats, and 151 Delta Main seats.

While Delta has been criticized for the age of its cabins on the 767-300ERs, it offers direct aisle access on these planes in business class, whereas the first class cabin on Hawaiian’s A330s is configured six-abreast. However, these aircraft will receive new seats and a premium economy cabin in 2028.

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1

Boston – Honolulu

4,427 nautical miles (8,200 km)

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In November 2025, Hawaiian Airlines ended its nonstop services from Honolulu to Boston Logan International Airport, which was then the longest US domestic route. Since then, the longest domestic route has been the JFK to Honolulu route, but on December 19, 2026, the Boston to Honolulu route will return. This time, however, it won’t be Hawaiian Airlines flying this route, but rather Delta Air Lines, which will operate this route daily from December 19 until January 2, 2027, using an Airbus A330-300.

After January 2, 2027, this route will be flown four times per week. Flight times will be blocked for 11 hours 40 minutes headed to Honolulu, and nine hours 55 minutes returning to Boston. At 4,427 nautical miles (8,200 km), this is the longest domestic route in the US, and is longer than many services from the US East Coast to Europe. As such, it pushes the limits of Delta’s older 233-ton A330-300s, although Delta also has ten A330-300s rated for a Maximum Takeoff Weight of 242 tons with more range.

Delta has been aggressively expanding in Boston, engaging in fierce competition against JetBlue, the city’s other large airline. However, JetBlue primarily operates services within the US East Coast and to the Caribbean, along with a handful of token European flights. Delta, in contrast, has a fully developed European network with widebody aircraft, along with a comprehensive domestic network to many markets where JetBlue is absent, and will now serve Hawaii as well.