How long before my scheduled flight to Paris do I need to arrive at the airport?

I usually see 3 hours for international flights and less for domestic... Play it safe if you have checked luggage

Depends how long security is on that day. At least 2 hours is usually safe

Rule of thumb 2hrs for domestic 3hrs for international. If your flight is later then 11pm you can take about 30 min off how early you need to be there.