Singapore Airlines and United Airlines both offer nonstop flights between San Francisco and Seoul ICN South Korea with airfare at $695 for April departures and as low as $715 for late May departure dates. June fares rise by $100 to $300. Singapore Airlines San Francisco SFO – Seoul ICN South Korea. Tuesday April 14 – […] The post Singapore or United SFO to Seoul ICN $695 to $715 April-May 2015 appeared first on Loyalty Traveler. Continue reading...