We solve a communication problem between a UAV and a set of relays, in the presence of a jamming UAV, using differential game theory tools. The standard solution involves a set of coupled Bellman equations which are hard to solve. We propose a new approach in which this kind of games can be approximated as pursuit-evasion games. The problem is posed in terms of optimizing capacity and it is approximated as a zero-sum, pursuit-evasion game. This game is solved using a set of differential equations known as Isaacs equations and simulations are run in order to validate the results.