Currently, the most affordable month to book a T'way Air flight from Incheon Intl Airport to Jeju City in September, with an average price of S$ 42. Conversely, traveling with T'way Air from Incheon Intl Airport to Jeju City in April will be the most expensive, with an average cost of S$ 554. Various factors influence flight prices, so comparing airlines, departure airports, and times can help reduce costs.
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