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We study the inverse spectral problems of recovering operators with two constant delays $a_1$, $a_2$ such that $\frac{\pi}{3} \leq a_1 < a_2 \leq \pi$, for two types of operators: Sturm--Liouville and Dirac differential operators. It is known that the point $\frac{2\pi}{5}$ is of crucial importance for the operators with one constant delay, since for the delay not less than $\frac{2\pi}{5}$ the theorem of uniquness is true and otherwise it is not. For the operators with two delays it is much more complex to determine the boundary line which separates sets of validity and invalidity of the theorem of uniquness. We have proved that this boundary line is $2a_1 + \frac{a_2}{2}=\pi$ which represents the generalization of the results for the operators with one delay.