Originally Posted by asu-ua772
Walking sounds great! 15 minutes doesn't seem that long.
Now a follow-up question:
What's the quickest way to walk there? Tell me if this is sufficient or if I should use another route:
1. Leave UA terminal (T7, well since I'm arriving on UX, T8)
2. Walk across Parking Structures heading towards T1
3. Right turn at T1, follow roadway to Sepulveda.
4. Left on Sepulveda until I reach In-N-Out.
Any problems with that? If so, feel free to list the directions you know of/used in the past.
Thanks.

From T8, you're already east of T1, so you would really be walking east of the parking structures closer to the administration building/old control tower.
Here is a super duper zoomed in satellite image of the area. You can get a pretty good idea of the layout of things this way.
http://tinyurl.com/jmrzm
With a roughly 3 hour conx time, I would probably have to recommend taking a cab up, if the taxi queue isn't too long, and then either walking or taking The Parking Spot shuttle back, depending on the wait at In-N-Out and the weather. In-N-Out isn't always the fastest fast food (but it is good!) And be sure to sit outside near the sidewalk to watch the traffic landing on Rwy 24R.