Ulsan to Seoul USN → GMP
Ulsan Airport (USN) → Gimpo International Airport (GMP)
The cheapest return found recently is $143 with Jin Air, 26 Dec – 16 Jan 2027, found 2 days ago. The cheapest one-way found recently is $78 with Jin Air, 26 Dec, found 2 days ago.
Return
Not enough comparable prices yet for a usual return price.
Cheapest return found recently
$143
26 Dec – 16 Jan 2027 · Jin Air
Ulsan Airport (USN) → Gimpo International Airport (GMP)
Leaves 2:35 p.m. · Return leaves 6:40 p.m. · 2 h of travel, both ways together
out nonstop, back nonstop
found 2 days ago
Cheapest nonstop return
$143
26 Dec – 16 Jan 2027 · Jin Air
Ulsan Airport (USN) → Gimpo International Airport (GMP)
Leaves 2:35 p.m. · Return leaves 6:40 p.m. · 2 h of travel, both ways together
out nonstop, back nonstop
found 2 days ago
Found recently, and the cheapest we hold
$143 26 Dec – 16 Jan 2027found 2 days agoSee prices for these dates
It is also the cheapest return we hold, of any age.
What have prices looked like?
Over 10 days, 2 Oct to 18 Oct, the cheapest return we saw each day was $99 to $143.
At $143, the cheapest return found recently is at the high end of that range.
10 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?
Not enough comparable prices yet: we hold return fares on 1 departure date and need at least 3 to say what is usual.
Could nearby dates be cheaper?
We hold no other 21-night return fares leaving within 3 days of 26 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 | |
|---|---|---|---|---|---|---|
| 26 Dec – 16 Jan 2027 | $143 | Jin Air | Ulsan Airport (USN) → Gimpo International Airport (GMP) | out nonstop, back nonstop | found 2 days ago | See prices for these dates |
Airlines on the cheapest dates: Jin Air.
One-way
The cheapest one-way fare on each of 4 departure dates is usually $46 to $65.
Cheapest one-way found recently
$78
26 Dec · Jin Air
Ulsan Airport (USN) → Gimpo International Airport (GMP)
Leaves 2:35 p.m. · 1 h trip
nonstop
found 2 days ago
Cheapest nonstop one-way
$78
26 Dec · Jin Air
Ulsan Airport (USN) → Gimpo International Airport (GMP)
Leaves 2:35 p.m. · 1 h trip
nonstop
found 2 days ago
Found recently, and the cheapest we hold
$78 26 Decfound 2 days agoOpen this trip
$45 5 Novfound 6 days agoOpen this trip
What have prices looked like?
Over 25 days, 24 Sept to 18 Oct, the cheapest one-way we saw each day was $31 to $46.
At $78, the cheapest one-way found recently is above 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 24 Oct to 26 Dec, 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 26 Dec to compare.
Every date we hold
4 fares on 4 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 24 Oct | $46 | Korean Air | Ulsan Airport (USN) → Gimpo International Airport (GMP) | nonstop | found 5 days ago | Open this trip |
| 5 Nov | $45 | Jin Air | Ulsan Airport (USN) → Gimpo International Airport (GMP) | nonstop | found 6 days ago | Open this trip |
| 7 Nov | $60 | Korean Air | Ulsan Airport (USN) → Gimpo International Airport (GMP) | nonstop | found 6 days ago | Open this trip |
| 26 Dec | $78 | Jin Air | Ulsan Airport (USN) → Gimpo International Airport (GMP) | nonstop | found 2 days ago | Open this trip |
Which month looks cheapest?
November 2026 is the cheapest month — from $45.
Airlines on the cheapest dates: Korean Air, Jin Air.
Premium cabin fares from Ulsan 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 26 Dec – 16 Jan 2027 in another cabin: Premium economy · Business · First
Today's prices for 26 Dec in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Ulsan to Seoul?
Return
Not enough history yet: in 10 days of return prices, 2 Oct to 18 Oct, fewer than 3 booking ranges had prices on 7 days or more.
One-way
The cheapest fares were 0 to 6 days before departure.
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 |
|---|---|---|---|---|
| 0–6 days | $40 | $31 | Cheapest seen | 25 |
| 7–13 days | $41 | $38 | +3% | 23 |
| 14–29 days | $46 | $45 | +15% | 16 |
| 60–89 days | $66 | $65 | +65% | 21 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Busan → Seoul
45 km from Ulsan
$84
$59 less than flying from Ulsan
25 Oct – 25 Oct · PUS → GMP · out nonstop, back nonstop
found 2 hours ago
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Busan → Seoul
45 km from Ulsan
$22
$56 less than flying from Ulsan
29 Oct · PUS → GMP · nonstop
found 2 hours ago
Jinju → Seoul
116 km from Ulsan
$35
$43 less than flying from Ulsan
27 Oct · HIN → GMP · nonstop
found 2 days ago
Pohang → Seoul
54 km from Ulsan
$40
$38 less than flying from Ulsan
24 Oct · KPO → GMP · nonstop
found 5 days ago
Daegu → Seoul
74 km from Ulsan
$59
$19 less than flying from Ulsan
28 Oct · TAE → GMP · 1 stop
found yesterday
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 26 Dec – 16 Jan 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