Visa Checkout allows Visa cardholders to make online purchases at participating retailers with a single sign in—no need to reenter card and personal information for every transaction.

This United promotion rewards members of its loyalty program for signing up and using the service.

Offer Details

Through September 30, or “while supplies last,” MileagePlus members can earn a one-time bonus of 500 miles for creating a new Visa Checkout account and using it within 15 days for a purchase of $5.00 or more charged to a United MileagePlus Visa card.

Deal or No Deal

For MileagePlus members who regularly use their program-linked Visa cards for online purchases, this offer is a no-brainer. The convenience of Visa Checkout is real. And although the bonus is a modest one, it’s still worth pursuing, if only to extend the life of banked MileagePlus miles.

Reader Reality Check

Have you used a quick-checkout service like Visa Checkout? Nice, right?

After 20 years working in the travel industry, and almost that long writing about it, Tim Winship knows a thing or two about travel. Follow him on Twitter @twinship.

This article first appeared on SmarterTravel.com, where Tim is Editor-at-Large.