Cheap Flights from San Francisco to Seoul — $307

San Francisco International (SFO) is the region’s primary international hub, typically handling long-haul carriers alongside U.S. legacy and major low-cost airlines; it can be pricier than smaller Bay Area airports for some routes. The airport sits about 21 km (13 miles) south of downtown San Francisco, with options including BART (roughly 30–45 minutes to center, fares usually in the low double digits), airport shuttle/taxis (30–60 minutes depending on traffic, fares vary), and ride-hailing services. Pros: extensive international connections, full-service terminals and amenities. Cons: peak-hour traffic and security queues can add time, and ground transit can be costly compared with nearby secondary airports.

Seoul is served primarily by two airports with distinct roles. Incheon International (ICN) functions as the city’s major international hub, handling most long-haul and premium carriers as well as many full-service Asian airlines; it’s about 48 km west of central Seoul and reachable by AREX express or ITX trains in roughly 45–60 minutes (fares typically in the mid-range for public rail) or by airport limousine bus and taxis, which can take 60–90 minutes depending on traffic. Gimpo (GMP) operates more as a domestic and short-haul gateway, favored by budget and low-cost carriers as well as select regional and domestic routes; it sits roughly 15 km from downtown, with a 20–30 minute metro or taxi ride and modest fares. Pros: ICN offers extensive amenities and international connections; Gimpo is closer and often quicker for city access. Cons: ICN’s distance can mean longer ground transfers and occasional traffic or higher taxi costs, while Gimpo has fewer long-haul options.

The route San Francisco — Seoul is served by many carriers — 5 in total, including United Airlines, Asiana Airlines, Perimeter Aviation Ltd., Westjet, and Air Canada. This gives passengers wide opportunities: from finding the lowest fare (from $307) to selecting flights by schedule or service class. Our service aggregates data from multiple booking systems so you can compare offers in one place. This saves time and money: no need to check dozens of sites — just pick the right option and book online.