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Flights between Seoul (ICN) and San Francisco (SFO)

Incheon International Airport, South Korea ↔ San Francisco International Airport, United States

A direct route between Seoul and San Francisco appears in the OpenFlights route network.

This reflects historical scheduled service and may be out of date — it is not a live timetable.

Airlines that have operated this route include:

Korean Air (KE)Asiana Airlines (OZ)Singapore Airlines (SQ)United Airlines (UA)US
Distance
9,085 km
5,645 miles
Est. flight time
11h 51m
great-circle estimate
Time difference
~17h
varies with DST
View this route on the live map →Search fares on Skyscanner ↗

Climate

Typical monthly temperatures in South Korea

Jan
3°
8/-2
20mm
Feb
6°
11/1
25mm
Mar
11°
16/6
50mm
Apr
18°
23/13
70mm
May
23°
28/18
100mm
Jun
27°
32/22
130mm
Jul
29°
34/24
350mm
Aug
30°
35/25
290mm
Sep
26°
31/21
170mm
Oct
20°
25/15
50mm
Nov
12°
17/7
50mm
Dec
5°
10/0
25mm

Mean °C (high/low below), avg. rainfall mm · country-level monthly normals, not airport-specific.

Typical monthly temperatures in United States

Jan
4°
9/-1
70mm
Feb
6°
11/1
60mm
Mar
11°
16/6
75mm
Apr
17°
22/12
80mm
May
23°
28/18
95mm
Jun
28°
33/23
100mm
Jul
30°
35/25
95mm
Aug
29°
34/24
90mm
Sep
25°
30/20
80mm
Oct
18°
23/13
70mm
Nov
11°
16/6
70mm
Dec
5°
10/0
75mm

Mean °C (high/low below), avg. rainfall mm · country-level monthly normals, not airport-specific.

Travel advisories

South Korea: Normal precautions (UK FCDO) ↗United States: Normal precautions (UK FCDO) ↗

Common questions

How far is Seoul from San Francisco?

Seoul (ICN) and San Francisco (SFO) are around 9,085 km (5,645 miles) apart — an estimated 11h 51m by air. Distances and flight times are great-circle estimates.

Which airlines have operated the ICN–SFO route?

Airlines recorded operating this route in the OpenFlights network include Korean Air, Asiana Airlines, Singapore Airlines, United Airlines, US. This reflects historical scheduled service and may be out of date.

What is the time difference between Seoul and San Francisco?

Time difference ~ 17 hours (varies with daylight-saving).

When is it warmest in United States?

Across United States, the warmest month on average is July, with mean temperatures around 30°C. These are country-level monthly climate normals, not airport-specific.

Are there travel advisories for South Korea and United States?

The UK FCDO currently rates South Korea as Normal precautions; The UK FCDO rates United States as Normal precautions. Check the official sources before you travel.

Distances and flight times are great-circle estimates, not booked block times.