San Francisco to Seoul SFO → GMP, ICN
San Francisco International Airport (SFO) → Gimpo International Airport (GMP), Incheon International Airport (ICN)
The cheapest return found recently is $636 with Air Premia, 5 Feb 2027 – 14 Feb 2027, found yesterday. The cheapest one-way found recently is $319 with Air Premia, 11 Jan 2027, found 3 days ago.
Return
The cheapest return fare on each of 8 departure dates is usually $659 to $954.
Cheapest return found recently
$636
5 Feb 2027 – 14 Feb 2027 · Air Premia
San Francisco International Airport (SFO) → Incheon International Airport (ICN)
Leaves 3:20 p.m. · Return leaves 7:45 p.m. · 23 h 35 min of travel, both ways together
out nonstop, back nonstop
found yesterday
Cheapest nonstop return
$636
5 Feb 2027 – 14 Feb 2027 · Air Premia
San Francisco International Airport (SFO) → Incheon International Airport (ICN)
Leaves 3:20 p.m. · Return leaves 7:45 p.m. · 23 h 35 min of travel, both ways together
out nonstop, back nonstop
found yesterday
Found recently, and the cheapest we hold
$636 5 Feb 2027 – 14 Feb 2027found yesterdaySee prices for these dates
It is also the cheapest return we hold, of any age.
What have prices looked like?
Over 25 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $636 to $794.
At $636, the cheapest return found recently is at the low end of that range.
25 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good return price?
Compared with the cheapest return fare on each of 8 departure dates from 6 Nov to 5 Feb 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other 9-night return fares leaving within 3 days of 5 Feb 2027 to compare.
Every date we hold
9 fares on 8 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 6 Nov – 16 Nov | $880 | United Airlines | San Francisco International Airport (SFO) → Incheon International Airport (ICN) | out nonstop, back nonstop | found yesterday | See prices for these dates |
| 7 Nov – 16 Nov | $662 | United Airlines | San Francisco International Airport (SFO) → Incheon International Airport (ICN) | out 1 stop, back nonstop | found yesterday | See prices for these dates |
| 8 Nov – 15 Nov | $794 | United Airlines | San Francisco International Airport (SFO) → Incheon International Airport (ICN) | out nonstop, back nonstop | found yesterday | See prices for these dates |
| 15 Nov – 22 Nov | $794 | United Airlines | San Francisco International Airport (SFO) → Incheon International Airport (ICN) | out nonstop, back nonstop | found 2 days ago | See prices for these dates |
| 5 Dec – 13 Dec | $650 | United Airlines | San Francisco International Airport (SFO) → Incheon International Airport (ICN) | out 1 stop, back nonstop | found yesterday | See prices for these dates |
| 12 Dec – 20 Dec | $1,177 | Alaska Airlines | San Francisco International Airport (SFO) → Gimpo International Airport (GMP) | out 2 stops, back 1 stop | found yesterday | See prices for these dates |
| 17 Dec – 22 Dec | $1,959 | United Airlines | San Francisco International Airport (SFO) → Gimpo International Airport (GMP) | out 2 stops, back 1 stop | found today | See prices for these dates |
| 5 Feb 2027 – 14 Feb 2027 | $636 | Air Premia | San Francisco International Airport (SFO) → Incheon International Airport (ICN) | out nonstop, back nonstop | found yesterday | See prices for these dates |
Which month looks cheapest?
February 2027 is the cheapest month — from $636.
Airlines on the cheapest dates: United Airlines, Alaska Airlines, Air Premia.
One-way
The cheapest one-way fare on each of 4 departure dates is usually $341 to $371.
Cheapest one-way found recently
$319
11 Jan 2027 · Air Premia
San Francisco International Airport (SFO) → Incheon International Airport (ICN)
Leaves 3:20 p.m. · 13 h trip
nonstop
found 3 days ago
Cheapest nonstop one-way
$319
11 Jan 2027 · Air Premia
San Francisco International Airport (SFO) → Incheon International Airport (ICN)
Leaves 3:20 p.m. · 13 h trip
nonstop
found 3 days ago
Found recently, and the cheapest we hold
$319 11 Jan 2027found 3 days agoOpen this trip
It is also the cheapest one-way we hold, of any age.
What have prices looked like?
Over 25 days, 24 Sept to 18 Oct, the cheapest one-way we saw each day was $319 to $373.
At $319, the cheapest one-way found recently is at the low end of that range.
25 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good one-way price?
Compared with the cheapest one-way fare on each of 4 departure dates from 29 Nov to 11 Jan 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other one-way fares leaving within 3 days of 11 Jan 2027 to compare.
Every date we hold
4 fares on 4 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 29 Nov | $348 | Air Premia | San Francisco International Airport (SFO) → Incheon International Airport (ICN) | nonstop | found 6 days ago | Open this trip |
| 4 Dec | $429 | Frontier Airlines | San Francisco International Airport (SFO) → Incheon International Airport (ICN) | 1 stop | found 3 days ago | Open this trip |
| 6 Dec | $352 | Air Premia | San Francisco International Airport (SFO) → Incheon International Airport (ICN) | nonstop | found 3 days ago | Open this trip |
| 11 Jan 2027 | $319 | Air Premia | San Francisco International Airport (SFO) → Incheon International Airport (ICN) | nonstop | found 3 days ago | Open this trip |
Which month looks cheapest?
January 2027 is the cheapest month — from $319.
Airlines on the cheapest dates: Air Premia, Frontier Airlines.
Premium cabin fares from San Francisco to Seoul
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 5 Feb 2027 – 14 Feb 2027 in another cabin: Premium economy · Business · First
Today's prices for 11 Jan 2027 in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for San Francisco to Seoul?
Return
The cheapest fares were 7 to 13 days before departure.
From the cheapest return each day between 24 Sept and 18 Oct (25 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 0–6 days | $688 | $649 | +4% | 22 |
| 7–13 days | $659 | $653 | Cheapest seen | 16 |
| 14–29 days | $681 | $659 | +3% | 17 |
| 30–59 days | $663 | $650 | +1% | 20 |
| 60–89 days | $1,351 | $678 | +105% | 25 |
| 90–179 days | $678 | $636 | +3% | 23 |
| 180+ days | $724 | $679 | +10% | 16 |
One-way
Timing didn't matter much here — prices were about the same in every range.
From the cheapest one-way each day between 24 Sept and 18 Oct (25 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 30–59 days | $352 | $348 | Cheapest seen | 8 |
| 90–179 days | $358 | $349 | +2% | 15 |
| 180+ days | $364 | $359 | +3% | 17 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Oakland → Seoul
13 km from San Francisco
$883
$247 more than flying from San Francisco
5 Feb 2027 – 14 Feb 2027 · OAK → ICN · out 1 stop, back 1 stop
found yesterday
San Jose → Seoul
67 km from San Francisco
$1,278
$642 more than flying from San Francisco
5 Feb 2027 – 14 Feb 2027 · SJC → ICN · out 1 stop, back 1 stop
found yesterday
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
San Jose → Seoul
67 km from San Francisco
$751
$432 more than flying from San Francisco
4 Dec · SJC → ICN · 2 stops
found 3 days ago
Oakland → Seoul
13 km from San Francisco
$893
$574 more than flying from San Francisco
4 Dec · OAK → ICN · 1 stop
found 3 days ago
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest return found recently is for 5 Feb 2027 – 14 Feb 2027. A live search on this page shows what those dates cost now, for one adult in economy.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work