Cheapest Day to Buy Flights from San Francisco to Seoul
San Francisco to Seoul is 9,086 km (5,646 mi) great-circle — usually 12 h+ with at least 1 stop. Fares typically bottom out 3–12 weeks before departure; the calendar below shows the cheapest price for every day of the next 12 months.
Check live prices on Aviasales ↗Low Fare Calendar — San Francisco to Seoul
When to book vs. when to fly — San Francisco → Seoul
Live data from recent Aviasales searches for SFO → ICN, plus a booking rule of thumb.
Lowest indicative per-adult round-trip fares seen in Aviasales searches — confirmed live on the booking site before payment.
See the cheapest month’s fares ↗Search any date — San Francisco → Seoul
Flight options — San Francisco → Seoul
Recently-seen round-trip fares — click any flight for details, alternatives and booking.
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FAQ — SFO → ICN
How much is a flight from San Francisco to Seoul?
Prices vary by season and departure day. The Low Fare Calendar on this page shows the cheapest fare for every day of the coming year between San Francisco (SFO) and Seoul (ICN).
Which airlines fly from San Francisco to Seoul?
The San Francisco → Seoul route covers about 9,086 km and usually 12 h+ with at least 1 stop. Multiple carriers operate it — search FlyTiming to compare every airline and agency serving SFO → ICN in one search.
What is the cheapest day to fly from San Francisco to Seoul?
It varies by month. The price card on this page highlights the cheapest month and the historically cheapest day of the week to fly this route — the Low Fare Calendar below marks low-fare days in green.
When is the best time to book flights from San Francisco to Seoul?
As a rule of thumb, fares on international routes are usually lowest roughly 3–12 weeks before departure — and northern-summer peak (June–August) usually means the highest fares — book early or aim for the shoulder months. The calendar below is the fastest way to spot the cheapest months for San Francisco → Seoul.