2 hrs before your International flight is recommended
Hour is good-ish, but also depends on time of flight. Earlier in the a.m. there are less flyers, so less delay in pushing people through. Later in the day flights may be delayed longer, but not a guarantee either.
A hour before hand
They usually bored about 30 muns before the time they say you take off so I'd be there about 45 mins early to a hour for security and stuff
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