By what time should I leave Incheon Airport if it's a 7 o'clock flight?

I'm supposed to take a 7 o'clock flight from Incheon Airport. Until what time should I leave?

I know it's good to leave 2 hours in advance, but I think it'll be 5:30 even if I take the first train.

1315 2018-03-05 Lady

It's so close even if you don't look for duty-free items and just go through the procedures

Lady 7 years ago 0

I really need at least two hours

Lady 7 years ago 0

I did it in an hour and a half, but the lucky thing was that it was possible because it was so close to the boarding area

Lady 7 years ago 0

It's hard on weekends, and even if it's a weekday, it'll be close

Gentleman 7 years ago 0

It's too tight. I recommend making a reservation for Darakhyu

Gentleman 7 years ago 0