Travel giant Expedia (EXPE) has reached a deal to acquire vacation rental firm HomeAway, Inc. (AWAY) for about $3.9 billion in cash and stock. The purchase price for the deal includes $10.15 per share in cash and 0.2065 shares of Expedia common stock for each share of HomeAway. The total price values HomeAway at $38.31 per share, based on Expedia’s closing price on Tuesday.