San Jose to Seoul SJC → ICN
Norman Y. Mineta San Jose International Airport (SJC) → Incheon International Airport (ICN)
The cheapest return found recently is $1,278 with Alaska Airlines, 5 Feb 2027 – 14 Feb 2027, found yesterday. The cheapest one-way found recently is $751 with Southwest Airlines, 4 Dec, found 3 days ago.
Return
The cheapest return fare on each of 7 departure dates is usually $1,369 to $2,136.
Cheapest return found recently
$1,278
5 Feb 2027 – 14 Feb 2027 · Alaska Airlines
Norman Y. Mineta San Jose International Airport (SJC) → Incheon International Airport (ICN)
Leaves 9:00 a.m. · Return leaves 8:00 p.m. · 34 h 47 min of travel, both ways together
out 1 stop, back 1 stop
found yesterday
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$1,278 5 Feb 2027 – 14 Feb 2027found yesterdaySee prices for these dates
$886 15 Nov – 22 Novfound 3 days agoSee prices for these dates
What have prices looked like?
Over 25 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $886 to $1,619.
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 7 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
10 fares on 7 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 6 Nov – 16 Nov | $2,351 | Alaska Airlines | Norman Y. Mineta San Jose International Airport (SJC) → Incheon International Airport (ICN) | out 1 stop, back 1 stop | found yesterday | See prices for these dates |
| 7 Nov – 16 Nov | $1,459 | American Airlines | Norman Y. Mineta San Jose International Airport (SJC) → Incheon International Airport (ICN) | out 2 stops, back 1 stop | found yesterday | See prices for these dates |
| 8 Nov – 15 Nov | $1,873 | Alaska Airlines | Norman Y. Mineta San Jose International Airport (SJC) → Incheon International Airport (ICN) | out 1 stop, back 1 stop | found yesterday | See prices for these dates |
| 15 Nov – 22 Nov | $886 | Alaska Airlines | Norman Y. Mineta San Jose International Airport (SJC) → Incheon International Airport (ICN) | out 1 stop, back 1 stop | found 3 days ago | See prices for these dates |
| 5 Dec – 13 Dec | $1,920 | Alaska Airlines | Norman Y. Mineta San Jose International Airport (SJC) → Incheon International Airport (ICN) | out 1 stop, back 1 stop | found yesterday | See prices for these dates |
| 12 Dec – 20 Dec | $2,469 | Alaska Airlines | Norman Y. Mineta San Jose International Airport (SJC) → Incheon International Airport (ICN) | out 1 stop, back 1 stop | found yesterday | See prices for these dates |
| 5 Feb 2027 – 14 Feb 2027 | $1,278 | Alaska Airlines | Norman Y. Mineta San Jose International Airport (SJC) → Incheon International Airport (ICN) | out 1 stop, back 1 stop | found yesterday | See prices for these dates |
Which month looks cheapest?
November 2026 is the cheapest month — from $886.
Airlines on the cheapest dates: Alaska Airlines, American Airlines.
One-way
Not enough comparable prices yet for a usual one-way price.
Cheapest one-way found recently
$751
4 Dec · Southwest Airlines
Norman Y. Mineta San Jose International Airport (SJC) → Incheon International Airport (ICN)
Leaves 2:35 p.m. · 29 h 10 min trip
2 stops
found 3 days ago
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$751 4 Decfound 3 days agoOpen this trip
It is also the cheapest one-way we hold, of any age.
What have prices looked like?
Over 21 days, 24 Sept to 17 Oct, the cheapest one-way we saw each day was $643 to $753.
21 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?
Not enough comparable prices yet: we hold one-way fares on 1 departure date and need at least 3 to say what is usual.
Could nearby dates be cheaper?
We hold no other one-way fares leaving within 3 days of 4 Dec to compare.
Every date we hold
1 fares on 1 departure dates
See every date as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 4 Dec | $751 | Southwest Airlines | Norman Y. Mineta San Jose International Airport (SJC) → Incheon International Airport (ICN) | 2 stops | found 3 days ago | Open this trip |
Airlines on the cheapest dates: Southwest Airlines.
Premium cabin fares from San Jose 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 4 Dec in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for San Jose to Seoul?
Return
Fares 30 to 59 days before departure were typically 41% lower than 0 to 6 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 | $1,619 | $930 | +70% | 20 |
| 7–13 days | $1,422 | $1,149 | +49% | 16 |
| 14–29 days | $1,485 | $941 | +56% | 16 |
| 30–59 days | $953 | $886 | Cheapest seen | 17 |
| 60–89 days | $2,407 | $929 | +153% | 20 |
| 90–179 days | $1,477 | $929 | +55% | 14 |
| 180+ days | $1,264 | $1,227 | +33% | 15 |
One-way
Not enough history yet: in 21 days of one-way prices, 24 Sept to 17 Oct, fewer than 3 booking ranges had prices on 7 days or more.
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
San Francisco → Seoul
67 km from San Jose
$636
$642 less than flying from San Jose
5 Feb 2027 – 14 Feb 2027 · SFO → ICN · out nonstop, back nonstop
found yesterday
Oakland → Seoul
61 km from San Jose
$883
$395 less than flying from San Jose
5 Feb 2027 – 14 Feb 2027 · OAK → 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 Francisco → Seoul
67 km from San Jose
$319
$432 less than flying from San Jose
11 Jan 2027 · SFO → ICN · nonstop
found 3 days ago
Oakland → Seoul
61 km from San Jose
$893
$142 more than flying from San Jose
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