^^^^

That is a sort of tricky thing to answer. The S400 would eventually detect the F-22, yes. But how far?

The F-22 can release 8 SDBs from 50-60nm to bombard the SAM with, and it can also jam it. The small radar signature of the fighter also means the missile seeker will have problems.

What if there is more than 1 F-22, incoming on multiple angles, and support jammers lessening the sensitivity of the S400?

Of course, S400 will not be alone and will also be equipped with decoys to help it fight, and assistance from own air force etc.

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44th VFW