Set steaks out of the fridge for 15-30 minutes prior to preparing to make steak.
Preheat air fryer to 400 degrees. If you are using an air fryer with a grill setting, preheat on high setting.
Season both sides of the steak and put oil on the bottom of the air fryer pan.
Sear both sides of the steak for 5 minutes and flip the steaks. Cook another 3-5 minutes and place a pat of butter on the steak before removing from air fryer.
For more rare steak cook closer to 6 minutes more well done, closer to 10 minutes.