Help name this movie
 

I have never seen this movie, but it was described to me and I would not mind watching it. This was about 12 years ago, and I had consumed certain substances (milk, cookies, the usual) so this may or may not be 100%.

The story involves a spy plane that never lands, just continually circles the globe, exchanging crew and supplies mid flight. During one crews flight the US and Russia have an all out Nuke fight and erase most of the planet. The plane looses contact and has no idea what has happened. They land, and this is about all I recall. This is I assume from the 80s.

Def-con 4?

...and... it's available on DVD...!...

. . . :o . . .

I thought in Def-Con 4 it was astronauts in a space capsule. It's been awhile, though.

DR. STRANGELOVE OR: HOW I LEARNED TO STOP WORRYING AND LOVE THE BOMB (1964) ... but I am not sure...

...definitely not DSO:HILTSWALTB...

. . . :o . . .

Thanks all, I might have to see if Hollywood has this as it seems like my friend was a bigger fan than the linked reviewer.

How does this compare to Miracle Mile? This is what we ended up watching when he could not find Def Con4, and I really liked MM.