One of the easiest ways to earn bonus miles is through airline shopping and dining portals.

By linking your card for dining and shopping through portals, you can earn bonus miles for things you already planned to spend money on.

In a new offer you can earn 500 bonus United miles from MileagePlus Shopping for a limited time.

During the May Bonus Campaign, which runs through May 26, 2017 at 11:59:59 pm ET you can earn a one time bonus of 500 miles for spending $200 or more at MileagePlus Shopping.

The bonus miles are in addition to the miles you already earn for making purchases through United MileagePlus Shopping.

What’s nice about these offers is that you don’t need to complete the spend in one purchase or one one site. The bonus is earned based on cumulative spend made during the promo- period.

Bonus miles should post 8-10 weeks after the promo ends.

This is a solid offer where you’ll earn an additional 2.5 miles per $1 spent.

Do you shop through airline shopping portals? If so, do you have a favorite?

Find out more about the May Bonus Campaign from MileagePlus Shopping here.