P&G via Amazon offers the Tech Tribe iPhone 6 Screen Protector 3-Pack, model no. TTI6SP, for $5.95. Coupon code "HG3442TM" cuts it to $1. Plus, Prime members bag free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $6.01.) That's $14 off and the lowest total price we could find.
It's also available for the iPhone 6 Plus for the same price via coupon code "HG3442TM".