Sapporo (CTS) to Ontario, California (ONT): 5,147 miles (8,284 km) great-circle, about 10h 50m nonstop by our estimate. Cheapest fare observed: $1594 round-trip on EVA Air, with 2 stops, departing April 26, 2026.
$1594 round-trip, EVA Air BR115, departing 2026-04-26 at 16:15, returning 2026-05-03. The recorded itinerary left on a Sunday, returning on a Sunday 7 nights later; the fare was observed 1 day before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $1594, it ranked 16th of the 16 round-trip fares we recorded from CTS (median $388). That is 31.0 cents per great-circle mile (round-trip price over one-way distance), above the CTS median of 23.7 cents across 16 round-trip routes.
Routes from CTS of similar length: Los Angeles (5,118 mi) at $1224 and New York (6,263 mi) at $1276.
EVA Air had the cheapest fare on 2 of 16 CTS routes. It is the 2nd longest of the 16 routes we track from CTS.
Of 4 departure airports with a fare to Ontario, California, Sapporo (CTS) ranked 4th at $1594. Lowest: $59 from Las Vegas (LAS); highest: $1594 from Sapporo (CTS); 3 nonstop. Cheapest-fare airlines (routes): Frontier (2), EVA Air (1) and Volaris (1).
That depends on your passport and trip, so check the official source for United States: U.S. Customs and Border Protection: international visitors. Connecting elsewhere? Check that country's transit rules too.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones Asia/Tokyo, America/Los_Angeles; flight time is our estimate.