$50 off Southwest Airlines with PayPal
Southwest Airlines, which offers many direct flights right into Las Vegas, is running a special rebate if you pay by PayPal.
Just purchase a ticket with PayPal at Southwest for $250 or more, and you'll receive a $50 rebate deposited to your PayPal account in 6-8 weeks.
Note that this is good for all Southwest flights, not just ones originating or arriving in Las Vegas.
That's 20 percent off your flight, the savings of which you can use on in-flight drink coupons.
The offer is only good for the first 10,000 people (or until March 27, whichever comes first), and there's no way of telling if you're one of the 10,000, but if you were planning to purchase a ticket anyway, try PayPal.
