US STOCKS-Wall St slides as oil prices tumble to near 7-year low
* Energy stocks tank, crude dips to near 7-year low after OPEC
* Airline stocks jump on falling oil prices
* Office Depot, Staples fall on regulatory deal hurdle
* Indexes fall: Dow 0.66 pct, S&P 0.7 pct, Nasdaq 0.79 pct (Updates with market close, adds commentary)
By Sinead Carew
Dec 7 (Reuters) - U.S. stocks fell on Monday, led by the S&P energy index's biggest one-day percentage drop since late August as oil prices slid to their lowest point in nearly seven years.
U.S. crude oil futures settled down almost 6 percent while Brent crude fell more than 5.3 percent after OPEC's meeting last week failed to address a growing supply glut.
The S&P energy sector energy index closed down 3.7 percent after dropping as much as 5 percent earlier in the session and oil majors Exxon and Chevron were the biggest drags on the S&P, with almost 3 percent declines.
The major U.S. indexes pared losses late in the session. Continuación...