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…

No cached fares for exactly 2026-06-08 → 2026-06-15. Showing recent fares on SFO → ICN — pick a different date in the calendar above or run a live search.

San Francisco → Seoul · 18 fares

Cached from Travelpayouts · filter & sort below

Showing 18 of 18 results

Cheapest
F8 · F8 1849
OutboundSFO → ICNTue, Jun 2 · 1:45 AM· 14h 40m· 1 stop
$649
one-way
Book →
ZG · ZG 25
OutboundSFO → ICNWed, Aug 26 · 12:15 AM· 13h 30m· 1 stop
ReturnICN ← SFOMon, Sep 7 · 10:30 PM· 13h 5m· 2 stops
$795
total round-trip
Book →
Philippine Airlines · PR 105
OutboundSFO → ICNWed, Aug 5 · 7:30 AM· 18h 5m· 1 stop
ReturnICN ← SFOThu, Sep 3 · 3:55 AM· 12h 20m· 1 stop
$839
total round-trip
Book →
United Airlines · UA 893
OutboundSFO → ICNThu, Apr 30 · 5:20 PM· 12h 40m· Non-stop
ReturnICN ← SFOSun, May 3 · 2:30 AM· 10h 45m· Non-stop
$870
total round-trip
Book →
ZG · ZG 25
OutboundSFO → ICNWed, Sep 2 · 12:15 AM· 13h 15m· 1 stop
ReturnICN ← SFOSun, Sep 13 · 3:55 AM· 12h 20m· 1 stop
$896
total round-trip
Book →
Philippine Airlines · PR 105
OutboundSFO → ICNSat, Sep 12 · 7:30 AM· 18h 5m· 1 stop
ReturnICN ← SFOFri, Oct 2 · 10:20 PM· 17h 5m· 1 stop
$977
total round-trip
Book →
Cathay Pacific · CX 879
OutboundSFO → ICNFri, Oct 2 · 8:00 PM· 18h 35m· 1 stop
ReturnICN ← SFOSun, Oct 18 · 11:05 AM· 16h 25m· 1 stop
$1,024
total round-trip
Book →
ZG · ZG 25
OutboundSFO → ICNMon, Sep 21 · 12:15 AM· 13h 15m· 1 stop
ReturnICN ← SFOSun, Oct 4 · 11:55 AM· 14h 25m· 3 stops
$1,067
total round-trip
Book →
United Airlines · UA 1233
OutboundSFO → ICNFri, May 29 · 1:15 PM· 18h 2m· 2 stops
ReturnICN ← SFOSun, Jun 7 · 2:30 AM· 11h· Non-stop
$1,148
total round-trip
Book →
United Airlines · UA 893
OutboundSFO → ICNMon, May 18 · 5:20 PM· 12h 40m· Non-stop
ReturnICN ← SFOThu, May 28 · 7:50 AM· 11h 10m· Non-stop
$1,218
total round-trip
Book →
Air Canada · AC 567
OutboundSFO → ICNThu, Jun 18 · 7:15 PM· 14h 39m· 1 stop
ReturnICN ← SFOFri, Jul 3 · 11:45 AM· 13h 30m· 1 stop
$1,461
total round-trip
Book →
2E · 2E 3084
OutboundSFO → ICNSun, Dec 27 · 9:05 PM· 14h 15m· 1 stop
ReturnICN ← SFOFri, Jan 8 · 7:00 AM· 10h 30m· Non-stop
$1,480
total round-trip
Book →
2E · 2E 3084
OutboundSFO → ICNSun, Dec 27 · 9:05 PM· 14h 15m· 1 stop
ReturnICN ← SFOSat, Jan 9 · 7:00 AM· 10h 30m· Non-stop
$1,480
total round-trip
Book →
China Eastern · MU 590
OutboundSFO → ICNSat, Dec 26 · 8:00 PM· 15h 25m· 1 stop
ReturnICN ← SFOFri, Jan 8 · 10:55 PM· 11h 40m· 1 stop
$1,510
total round-trip
Book →
American Airlines · AA 2228
OutboundSFO → ICNSun, Jun 28 · 6:29 AM· 18h 34m· 1 stop
ReturnICN ← SFOFri, Jul 3 · 11:45 AM· 13h 30m· 1 stop
$1,553
total round-trip
Book →
Vietnam Airlines · VN 99
OutboundSFO → ICNFri, Jun 26 · 5:50 AM· 21h· 1 stop
ReturnICN ← SFOFri, Jul 3 · 11:45 AM· 13h 30m· 1 stop
$1,584
total round-trip
Book →
ZG · ZG 25
OutboundSFO → ICNFri, Jun 26 · 11:45 PM· 13h 45m· 1 stop
ReturnICN ← SFOSat, Jul 4 · 3:55 AM· 12h 20m· 1 stop
$1,593
total round-trip
Book →
China Southern · CZ 660
OutboundSFO → ICNFri, Jun 26 · 7:35 AM· 21h 50m· 1 stop
ReturnICN ← SFOFri, Jul 3 · 11:45 AM· 13h 30m· 1 stop
$1,642
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.

Apr
Low
from $870
May
Shoulder
from $1148
Jun
Peak
from $1461
Jul
No data
Aug
Low
from $795
Sep
Low
from $896
Oct
Shoulder
from $1024
Nov
No data
Dec
Peak
from $1480
Jan
No data
Feb
No data
Mar
No data

Cheapest next 12 months: August from $795 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.

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.

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