Great1 stop · 14h
SEL to ISTTürkiye
Istanbul
$390
usually $640
−39%
Most monthly lows $515–$679. Cheaper than every other month on record (8).
Flights · SEL → SJO
Seoul to San José
Best fare, round trip
$1,657
Too little price history on this route to compare — the fare is shown as found.
Found
- Depart
- Mon 15 Feb
- Return
- Sun 28 Feb
- Stay
- 13 nights
- Flight
- 1 stop · 18.5h
- Airline
Korean Air
Cached fare — the booking search re-prices live before you pay.
Costa RicaSan JoséNobody comes for the capital — they come for two coasts, volcanoes and cloud forest, all within four hours.Best windowDec–AprAirportsJuan Santamaría (SJO)Every route into San JoséFare seasonality
When this route gets cheap.
The cheapest itinerary we are tracking makes one stop and takes about 18.5 hours outbound, on a 13-night trip — ticketed under Korean Air, which on a connecting fare need not operate every leg. At $1,657 for 13,822 km each way, that works out to about $60 per 1,000 km flown. That is above the $42 per 1,000 km typical of ultra-long-haul fares here. Across the 11 departure cities we track at a similar distance from San José, this fare ranks 10th — 1.9× the $865 we hold from Istanbul. For context, the middle fare among the 14 routes of similar length we watch out of Seoul is $1,424. We have 1 month of cached prices for this route so far — not enough to call a fare cheap or expensive, so we publish the price without a percentage. Fare history here is still too short to name a cheap season. The best time to be in San José: Dec–Apr.
We are still collecting this route's months — 1 month of cached prices so far, too few to chart.
Route facts
- Airports
- Incheon (ICN) · Gimpo (GMP) ↔ Juan Santamaría (SJO)
- Flight time
- ≈18.5 hours outbound
- Distance
- ≈13,822 km each way
- Airlines on the board
- Korean Air
- Itineraries
- Connections on current fares
- Best months to visit
- Dec–Apr
Good to know
SEL → SJO, answered.
How far in advance should I book SEL → San José?
We do not publish a number for this, because we cannot measure it yet. Answering it honestly means watching the same departure date on this route over many weeks as it approaches, and that archive is still filling up — so any "book N days ahead" figure here would be borrowed from somewhere else rather than measured. Our guide Why flight prices change covers the levers we can measure.
Are there nonstop flights from Seoul to San José?
The current cheapest fares involve a connection, ticketed under Korean Air. We hold no nonstop fare on this route right now, which does not mean none flies — search your exact dates to see what does.
Are these prices guaranteed?
No — these are cached fares found on real searches (this one on 22 September). Airlines reprice constantly, so the booking search re-checks the live price before you pay. Fresher finds are far more likely to still be available.
Next step
Sleeping in San José?
Lock the flight first — then compare stays for 15–28 Feb '27 · 13 nights.
Browse hotelsMissed it?
Cached fares expire. This route has a feed of its own — follow it and the next SEL → SJO drop reaches you as soon as we find it.
Follow this route’s feedKeep browsing
Related routes on the board.
Great1 stop · 14h
SEL to FRAGermany
Frankfurt
$491
usually $760
−35%
Most monthly lows $660–$762. Cheaper than every other month on record (3).
GreatNonstop · 8.5h
SEL to HNLUnited States
Honolulu
$587
usually $890
−34%
Most monthly lows $617–$949. Cheaper than every other month on record (7).
Rare1 stop · 7h
NYC to SJOUnited States
New York
$249
usually $480
−48%
Most monthly lows $302–$492. Cheaper than every other month on record (5).
Great3 stops · 17h
IST to SJOTürkiye
Istanbul
$865
usually $1,325
−35%
Most monthly lows $978–$1,334. Cheaper than every other month on record (11).
Good1 stop · 4.5h
MIA to SJOUnited States
Miami
$423
usually $545
−22%
Most monthly lows $530–$647. Cheaper than every other month on record (4).