Antoine de Saint-Exupery sonnet about a pilot's last flight in WWI

Dear texga,

I have been searching for the sonnet you describe, with (alas!) no
luck as yet.  I have sent an inquiry to the folks at Le Site de la
Société pour l’Œuvre et la Mémoire d’Antoine de Saint Exupery (the
official site of The Society for the Works and Memory of Antoine de
Saint Exupery), and am waiting to hear from them.  Their Website is:

http://www.saint-exupery.org/

In my searching, I have found no references at all to a sonnet such as
you describe, nor do I remember ever having heard of it (and I thought
that I had read most of what Saint Exupery wrote, though it was some
time ago).  Is it at all possible that you might by thinking of a poem
by William Butler Yeats, “An Irish Airman foresees his death”?

The poem begins:

“I know that I shall meet my fate
Somewhere among the clouds above;
Those that I fight I do not hate
Those that I guard I do not love . . .”

The Yeats poem is reproduced in its entirety here:

http://www.bartleby.com/148/3.html

And you can read both the poem and different readers’ analysis of it
here:
http://www.thebeckoning.com/poetry/yeats/yeats.html

The poem was written in honor of Major Robert Gregory, who fought and
died in World War I.

Best wishes,

pocoloco

Dear texga,

Following up on my previous comment . . . . I received an email from
Nathalie des Vallières of the Société Civile pour l’Œuvre et la
Mémoire d’Antoine de Saint-Exupéry, who said as follows “I’m sorry to
answer that Saint Exupéry never wrote any sonnet about any pilot of
World War I.”

Is the Yeats poem from my previous comment the one for which you are
searching?

pocoloco