Priceline is offering a FREE $30 Car Rental Bonus Cash when book any flight for a limited time. The bonus cash is good towarda a future Name Your Own Price car reservation and will be applied as $3 per day for up to 10 days ($30 total). A coupon for this credit will be emailed to you up to five days after your confirmed flight reservation. Coupon expires October 21, 2011. Deal expires September 30, 2011.