How long is the flight from San Francisco to Seoul?

Non-stop flights on SFO → ICN are typically around 12 hours. Connecting itineraries add 3–8 hours depending on the hub and layover.

Which airlines fly from San Francisco to Seoul?

The main carriers on this route are Korean Air, United, Asiana. Codeshare and one-stop options add several more — the filter panel above shows every airline in the current fare set.

When is the cheapest time to fly from San Francisco to Seoul?

Historically the lowest fares land in January, February, May. Summer (mid-June through mid-August) and the Christmas / New Year window are always peak. Mid-week departures (Tuesday–Thursday) typically beat weekend prices by 10–20%.

How far ahead should I book San Francisco to Seoul?

Six to ten weeks ahead is the sweet spot for this route. Inside three weeks, fares tend to spike as airlines sell to last-minute business travellers. Award availability often opens 10–11 months out if you're booking on miles.

Can I book directly on destination.com?

The Book button on each fare opens the airline or OTA (Trip.com, Kiwi, Expedia, Booking, Priceline, etc.) that's actually selling that ticket. You complete payment there at the same price you saw here — we never add a markup.

SFO → ICN

San Francisco to Seoul flights.

Live cached fares on San Francisco (SFO) → Seoul (ICN), refreshed every 30 minutes. Non-stop and connecting itineraries side by side — compare airlines, times and stops, then book in one click.

Flying time
~12h non-stop
Airlines
Korean Air, United, Asiana
Cheapest months
January, February, May

Flex dates · cheapest nearby

Loading prices…

Read our best-time-to-book guide for SFO → ICN →Target price, booking window, weekday pattern.

See 30-day price history for SFO → ICN →Median fare, lows, and best-day patterns.

No cached fares for exactly 2026-09-07 → 2026-09-14. Showing recent fares on SFO → ICN — pick a different date in the calendar above or run a live search.

San Francisco → Seoul · 9 fares12-month low · $353

Cached from Travelpayouts · filter & sort below

Showing 9 of 9 results

Cheapest
YP · YP 112
OutboundSFO → ICNSat, Sep 5 · 12:00 AM· 12h 40m· Non-stop
$353
one-way
Book →
YP · YP 112
OutboundSFO → ICNThu, Sep 10 · 12:00 AM· 12h 40m· Non-stop
$369
one-way
Book →
YP · YP 112
OutboundSFO → ICNTue, Sep 15 · 12:00 AM· 12h 40m· Non-stop
$369
one-way
Book →
United Airlines · UA 805
OutboundSFO → ICNTue, Sep 8 · 6:55 AM· 12h 25m· Non-stop
$385
one-way
Book →
United Airlines · UA 805
OutboundSFO → ICNWed, Sep 9 · 6:45 AM· 12h 35m· Non-stop
$385
one-way
Book →
United Airlines · UA 893
OutboundSFO → ICNSun, Sep 6 · 5:40 PM· 12h 20m· Non-stop
ReturnICN ← SFOSat, Sep 12 · 2:30 AM· 10h 40m· Non-stop
$513
total round-trip
Book →
United Airlines · UA 893
OutboundSFO → ICNWed, Aug 5 · 5:40 PM· 12h 20m· Non-stop
ReturnICN ← SFOThu, Sep 3 · 2:30 AM· 11h· Non-stop
$730
total round-trip
Book →
United Airlines · UA 1149
OutboundSFO → ICNMon, Apr 26 · 11:20 PM· 21h 21m· 1 stop
ReturnICN ← SFOFri, May 7 · 7:50 AM· 10h 45m· Non-stop
$841
total round-trip
Book →
YP · YP 112
OutboundSFO → ICNSat, Jul 25 · 12:00 AM· 12h 40m· Non-stop
ReturnICN ← SFOSat, Aug 1 · 1:50 AM· 14h 40m· 1 stop
$1,051
total round-trip
Book →

Try a nearby airport

Thin routes often have more options from a neighbouring airport.

Oakland (OAK) → Seoul (ICN)

nearby origin

San Jose (SJC) → Seoul (ICN)

nearby origin

San Francisco (SFO) → Seoul (GMP)

nearby destination

About San Francisco → Seoul

Korean Air + United dominate. ICN → onward Asia is faster and cheaper than connecting via HKG or NRT.

Typical non-stop flying time is around 12 hours. Major carriers on this route include Korean Air, United, Asiana. Fares are usually cheapest in January, February, May — book 6–10 weeks ahead and avoid school-holiday peaks (late June–August, Christmas–New Year) for the best pricing.

Month-by-month price guide: San Francisco to Seoul

Live cheapest round-trip fare cached on SFO → ICN for each of the next 12 months. Tap any month and run a live search to confirm.

Jul
Peak
from $1051
Aug
Shoulder
from $730
Sep
Low
from $513
Oct
No data
Nov
No data
Dec
No data
Jan
No data
Feb
No data
Mar
No data
Apr
Shoulder
from $841
May
No data
Jun
No data

Cheapest next 12 months: September from $513 round-trip. Run a live search →

Booking window tip

Long-haul fares are most predictable when booked 10-16 weeks ahead. Inside six weeks expect sharp increases, especially in premium cabins. If you're paying with miles, search 330+ days ahead when award inventory first loads.

Price drop alerts

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Where to stay

Once you’ve booked the flight, pick a Seoul neighbourhood.

See where to stay in Seoul →

Questions, answered

How long is the flight from San Francisco to Seoul?
Non-stop flights on SFO → ICN are typically around 12 hours. Connecting itineraries add 3–8 hours depending on the hub and layover.
Which airlines fly from San Francisco to Seoul?
The main carriers on this route are Korean Air, United, Asiana. Codeshare and one-stop options add several more — the filter panel above shows every airline in the current fare set.
When is the cheapest time to fly from San Francisco to Seoul?
Historically the lowest fares land in January, February, May. Summer (mid-June through mid-August) and the Christmas / New Year window are always peak. Mid-week departures (Tuesday–Thursday) typically beat weekend prices by 10–20%.
How far ahead should I book San Francisco to Seoul?
Six to ten weeks ahead is the sweet spot for this route. Inside three weeks, fares tend to spike as airlines sell to last-minute business travellers. Award availability often opens 10–11 months out if you're booking on miles.
Can I book directly on destination.com?
The Book button on each fare opens the airline or OTA (Trip.com, Kiwi, Expedia, Booking, Priceline, etc.) that's actually selling that ticket. You complete payment there at the same price you saw here — we never add a markup.

Other ways to reach Seoul

If your plans are flexible on the origin, these alternate departure airports also serve Seoul on the routes we track.

Other popular routes

Keep planning

Complete your Seoul trip

Trip plannerSeoul one-stop planTours, transfers, packages, and events for Seoul in one place.StaysWhere to stay in SeoulNeighborhood-by-neighborhood picks with live nightly rates.ExperiencesThings to do in SeoulCurated sights, food, nightlife, and tours across every district.Getting thereCheap flights to SeoulUS gateway fares with the months each route bottoms out.NeighborhoodsSeoul by districtLongform breakdowns of where locals eat, drink, and sleep.When to goBest time to visit South KoreaMonth-by-month verdicts on weather, crowds, and prices.