How long before the flight do we have to be at the airport for a domestic flight

How long before the flight do we have to be at the airport for a domestic flight?
We're going from Buffalo to Ft. Lauderdale. Anyone know at what time to be there? Like 2 hours ahead, 3? The flight itself is at 6:45 AM.
Air Travel - 9 Answers
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1 :
3 hours before the flight they usually tell u , when u buy the ticket hope this helped :D
2 :
just got back from ft lauderdale flew roundtrip there to jamaica and back... laudy is very organized.... we only did 1-1/2 and had time.. recommend 2 hrs though
3 :
A MINIMUM of one hour domestic and 2 hours foreign.. but if you stick to that 2 hour/3 hour schedule of yours you will never be left looking at the plane being pushed back from the gate.
4 :
i belive its technically 30 b4 the flight at the gate. also get ther about 1.5 hrs b4 the flight. knowing buffalo it may be busy plus 2 be safe
5 :
Usually 1 hour. But don't forget about the lines!
6 :
be at the airport no later than 4:30
7 :
1 hour early at least.
8 :
I'd check with the airline itself as there seem to be many different answers here. It's usually around three hours for international and about half for domestic but now with the new screening processes involved it may take longer.
9 :
I would do two hours.....you don't know how TSA feels that day...