Remember that for those who are residents of in the USA of Kentucky, Maine, Missouri, Montana, Oklahoma, Pennsylvania, South Carolina, or Washington, in spite of the fact that your driver’s license is valid for driving, it will no longer be valid for air travel after January 22, 2018. Of course, you’ll still be able to use your passport, permanent resident card/green card or a military ID. To learn more, visit…
https://www.dhs.gov/secure-drivers-license-documentation
(Thanks again for reminding us of this, Jenny.)
Seems like some states now have further extensions so worth checking your state’s current status at: https://www.dhs.gov/real-id#
Oklahoma has been granted an extension through Oct 2018.
http://kfor.com/2017/10/19/oklahoma-granted-real-id-extension-until-oct-2018/