If you have a lot of money, you can skip the road traffic and take a helicopter from the Downtown Manhattan Heliport to JFK, LaGuardia, or Newark airports. U.S. Helicopter provides shuttle service for $800 one-way and will get you there in 10 minutes or less. HeliNY Charters charges $1,850.
After the helicopter landed, some people got on and one minute later it took off. While I stood here, a couple helicopters came and went. I took video but I accidentally deleted it later.
Sources: U.S. Helicopter, Downtown Manhattan Heliport, HeliNY