Your Costco card grants you access to a lot of deals and discounts, but don't expect it to help when going through TSA at the airport.

Travelers who are headed to airports and hoping to use their Costco membership cards in place of Real IDs are out of luck. Travelers need a Real ID — or other acceptable form of identification — for domestic flights and for accessing federal facilities as of May 7.

If you don't have a Real ID-compliant license, don't try to use your Costco card or other membership ID — it won't work. Here's what will.