If you look into all the math and strategy regarding retirement, two years could make all the difference, especially at major airline pay.

There are other factors, but the biggies are...

1. Two years additional savings.
2. Two FEWER years in which you need to tap your investments.
3. Delay taking SS two years from when it would otherwise be prudent.

So two years roughly = four years, plus SS impact.

Anyway you can look into the math and see for youself. I'd recommend anybody much over age 35 do that... you might find you can bang out much earlier than you thought (especially at our income levels).