United Airlines has been quietly turning San Francisco International Airport (SFO) into its transpacific mega-hub. Its latest move is not another frequency to Seoul or Sydney, but something far more unusual: a new winter-seasonal nonstop to Sapporo, the capital of Japan’s northern Hokkaido prefecture and one of Asia’s great snow sports destinations.

The new route takes United to 19 Asia-Pacific destinations from San Francisco. It also reinforces a bigger strategic story: while Los Angeles has long been the United States’ most obvious transpacific gateway, United is building a rival transpacific platform at SFO that combines nonstop scale, Star Alliance connectivity, widebody depth, and a growing appetite for thinner, more adventurous long-haul routes.

A Rare Winter Long-Haul To Sapporo

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United will begin the first nonstop flights between the continental United States and Sapporo on December 11, operating three times weekly through March 26, 2027. The route will be flown by the Boeing 787-9 Dreamliner and is being pitched directly at adventure-seeking winter travelers, including skiers heading for Hokkaido’s powder, visitors to the world-renowned Sapporo Snow Festival, and food-focused tourists drawn by ramen, seafood, and Japan’s northern winter culture.

United is no stranger to interesting long-haul seasonal routes, but these are usually designed around summer demand to Europe. Sapporo is different: it is a genuine winter-seasonal long-haul route built around snow, ski, and cold-weather leisure demand. The schedule also works as a network play, with United saying that SFO will connect travelers from nearly 80 US cities to Sapporo, rather than it being a niche point-to-point route.

United will not be alone in testing North America–Sapporo demand. Air Canada has also announced thrice-weekly Sapporo flights from Vancouver International Airport (YVR), starting in December 2026, so the Star Alliance partners clearly both see an opportunity. Patrick Quale, United’s SVP of Network Planning, had the following to say:

“Whether customers are dreaming of skiing, exploring or an even bigger adventure across Asia, our new nonstop service from San Francisco to Sapporo makes it easier to vacation in one of Japan’s most unique destinations.”

San Francisco Is United’s Pacific Powerhouse

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The Sapporo launch is part of a much larger SFO story. United is the largest carrier between the continental United States and Japan, carrying over 1.8 million passengers between the two countries last year, more than all other US carriers combined. With the addition of Sapporo, the airline will fly up to 13 daily flights between the two countries this winter.

The four routes to Japan are bolstered by 15 other transpacific routes. These range from its largest trunk routes such as Hong Kong International Airport (HKG) and Singapore Changi Airport (SIN), which are flown twice-daily with its Boeing 777-300ER flagship, to a range of newer routes initiated in recent years that it is building up to daily service. In total, United operates up to 25 daily transpacific flights, far more than any other airline.

The aircraft mix also tells its own story. United is using the 777-300ER on the heaviest business and VFR markets, while the Boeing 777-200ER remains the workhorse for large daily markets such as Beijing Capital Airport (PEK) and Kansai International Airport(KIX) in Osaka. The 787-9 is used to add flights or for longer routes, such as the 8,400-mile (13,600 km) slog to Singapore with its 17-hour westbound block time, or for newer seasonal services.

That matters because United’s Pacific expansion is increasingly about long-and-thin growth. Adelaide and Christchurch, for example, are new long-haul routes from San Francisco, and part of a broader pattern of United using the 787 to reach cities that would be harder to justify with larger 777 capacity. They also show that seasonal does not mean experimental and forgotten; both return in December, and now Sapporo is added to that mix.

What Transpacific Routes Will United Add Next?

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With 137 Dreamliners still on order, and 20 expected to arrive this year, we can expect United to keep up its brisk pace of transpacific expansion. But what new Asia-Pacific routes from San Francisco will it launch next?

The first place to look would be at United’s own history, as it has previously served several Asia-Pacific markets from SFO that are not currently part of its route map. There are multiple destinations in China that the carrier might be tempted to resume, or it wants to add more Japanese destinations, then Nagoya Airport (NGO) and Fukuoka Airport (FUK) are strong choices. And then there’s also the fast-growing Indian market, which remains untouched from SFO.

There are also markets from San Francisco that other airlines serve, but United does not. These include Guangzhou Baiyun International Airport (CAN), which is served by China Southern Airlines, Delhi with Air India (another Star Alliance partner), or Tan Son Nhat International Airport (Ho Chi Minh City) (SGN) with Vietnam Airlines. Indeed, Southeast Asia as a whole, with its massive travel growth, probably offers the most attractive opportunities with the incoming 787-9s.

The broader point is that United is capitalizing on its dominance in San Francisco for long-haul growth. This means building a transpacific gateway that not only connects to the largest Asia-Pacific markets, but increasingly, more unusual destinations like Adelaide, Christchurch, Kaohsiung, and Sapporo. And that is particularly exciting for globe-trotters on the lookout for new, interesting and adventurous destinations.