Route · ICN → SFO
Flights from Seoul to San Francisco
Seoul Incheon to San Francisco is one of the busiest trans-Pacific corridors, spanning roughly 9,100 kilometres with a typical block time just under eleven hours eastbound and somewhat longer westbound against prevailing headwinds. Korean Air and Asiana Airlines dominate the route with wide-body equipment — generally Boeing 777s and Airbus A380s or A350s — while United Airlines offers a strong onward connection hub at SFO, and Delta provides an alternative for travellers routed through its Pacific partnerships. A practical note worth remembering: crossing the International Date Line means you arrive in San Francisco on the same calendar day you depart Seoul, which can wrong-foot itinerary planning and visa-entry date calculations. For fares, shoulder seasons around April to May and October tend to offer the most competitive economy pricing, while business-class redemptions on Korean Air's Prestige Class are often most available on midweek departures outside the summer peak.
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Cheapest dates to fly
Live prices · powered by AviasalesThe calendar below pulls live fares from our search partner for Seoul (ICN) → San Francisco (SFO). Use the year… view to spot the cheapest week to fly, the day-of-week patterns most travellers miss, and any shoulder-season dips worth shifting your trip around. Prices refresh every few hours, so what you see is what your booking page should look like a moment later — click any date to jump straight to the fare on Aviasales.
Airlines on this route
7 carriersThe 7 carriers we currently track on the Seoul–San Francisco route, from full-service flag carriers to low-cost competitors. Tap any airline for its full profile,… baggage rules, fleet context, and a live fare search pre-filtered to that carrier — useful if you're loyal to a frequent-flyer programme, want to compare onboard product on the same dates, or are weighing a cheaper one-stop against a pricier nonstop.
Flights from Seoul to San Francisco
Live schedule · powered by AviasalesBelow is the published weekly schedule for nonstop and one-stop services from Seoul to San Francisco — the actual flight numbers, departure and arrival times… your booking page will pull from. Use it to plan around departure preferences (early morning vs late evening), see which carriers fly on which weekdays, or pick a connection that lets you sleep in your own bed before a long-haul leg. Click any row to load it directly in the search.
Airport guides
Quick links into the airport profiles at both ends of the route. Each guide covers terminal layout, the airlines that base hubs at ICN and… SFO, the other routes those airports serve, and the ground-transit options most travellers wish they'd read about before landing — the practical context you only really need to know once you've booked, but want to skim before you do.