Nonstop Vietnam: San Francisco to Saigon on Vietnam Airlines
Vietnam Airlines flies from San Francisco to Saigon, Vietnam, three times a week on an Airbus A350-900, with a flight time of 16 hours and 30 minutes.
Nonstop Korea: Salt Lake City to Seoul on Delta Air Lines
Delta Air Lines operates this 13-hour-and-15-minute flight from Salt Lake City to Seoul, Korea, daily on an Airbus A350-900, beginning in June 2025.