large bird

[Sonyme]

what bird has a wingspan of up to 11 feet and is capable of gliding for thousands of miles without flapping it's wings?

I am thinking Albatross but the South American Condor also seems to fit the bill. Or is there another?

[Clanad]

Your first surmise certainly fits the bill. This link discusses some amazing structures inherent in the albatross that enable it to glide for hundreds, if not thousands of miles.
The Condor, on the other hand has a wing designed exclusively for gliding in mountainous areas depending on updrafts for lift. It's large wing, especially in the chord (front to aft) to length measurement doesn't fulfill the requirements nearly so well as that of the albatross, or any other large bird for that matter...

[Sonyme]

Thankyou you have confirmed what I had been thinking, but wanted some concurrence - more heads are better than 1!

[Lonnie]

Clanad is correct.

[wildwood]

Lonnie is correct.

[Cetti]

Clanad and Lonnie are correct.

[Cetti]

......and wildwood.

[wildwood]

Ha! Nearly got you there cetti.