When is it cheapest to fly to Korea?
The cheapest one-way fare to Seoul Incheon we currently know of is $80 from Taipei departing 2026-09-19, a fare found on 2026-08-09. We collect fares for 9 departure airports once a day and publish the date each fare was found, because a cached fare and a live quote are not the same thing.
Where are you flying from?
Tokyo to Seoul Incheon, one way, Tue 8 Sept
$92 · direct · 2h 40m
That is 35% below the average of the dates we have for that month.
| Month | Cheapest | Month average | Dates we have |
|---|---|---|---|
| August 2026 | $99 | $140 | 20 |
| September 2026 | $92 | $143 | 30 |
| October 2026 | $115 | $162 | 30 |
Same trip, next decision
Why a seller would not tell you this
An airline or a booking site wants the sale today. “Three weeks later is $120 cheaper” is a sentence that postpones their revenue, so the search box shows you the price for the date you typed and stays quiet about whether that date is an expensive one. Comparing a date against the rest of its month is the part nobody selling the ticket has a reason to build.
What we measure, and what we don't
We record the cheapest one-way fare observed for each departure date, along with the date that fare was found, and we keep the history. We do not quote live prices, hold seats, or know what you will be charged at checkout — the fare you see on the airline's page today may differ. We also do not compare return fares, because a return price depends on the return date and that makes outbound dates impossible to rank against each other.
Quick answers
When is it cheapest to fly to Seoul?
It depends on the departure airport, so this page asks for yours and then lists every departure date we have a fare for, cheapest first. Because we compare dates against the average of that month, you can see whether the date you already had in mind is an expensive one.
Are these live prices?
No. They are the cheapest fares recently observed for each date, and every row shows the date that fare was found. The price on an airline or booking site today may be higher or lower. Treat them as a guide to which dates are cheap, not as a quote.
Why are only some departure airports listed?
We only list airports we actually have collected fares for. Coverage varies: some routes return many dates, others only one or two. Where a route is too thin to average, the page says so instead of implying a price is good or bad.
Are these one-way or return fares?
One way. A return fare also depends on the return date, which would make dates impossible to compare against each other — two fares for the same outbound date could differ purely because of when you come back.