Cheap flights from San Francisco (SFO) to Ulsan (USN)
Find cheap flights from San Francisco to Ulsan with Cheapflights
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Find flight deals from San Francisco to Ulsan
Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Ulsan (USN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Popular in | December |
Cheapest in | March |
Average price | $1,191 |
Best time to book a flight from San Francisco to Ulsan
Have a flexible travel schedule? Discover the best time to fly to Ulsan from San Francisco with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from San Francisco to Ulsan
What is the cheapest month to book a flight from San Francisco to Ulsan?
Currently, March is the cheapest month in which you can book a flight from San Francisco to Ulsan (average of $832). Flying from San Francisco to Ulsan in December is currently the most expensive (average of $1,593). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from SFO to USN?
One of the essential ways to save on airfare from San Francisco to Ulsan is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 61% on airfare.
What is the cheapest day to fly from San Francisco to Ulsan?
Travelers seeking maximum savings on their San Francisco to Ulsan flight should consider departing on Monday at noon when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
How often are flights from San Francisco to Ulsan delayed?
About 16% of weekly flights between San Francisco and Ulsan have experienced delays in the past year, with the average delay time being 182 minutes.
What is the most punctual flight time for San Francisco to Ulsan flights?
Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Tuesday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on San Francisco to Ulsan flights?
Over the last year, American Airlines have had the lowest number of delays on this route, with just 11% of flights being delayed.