Traveling Abroad When One Will Miss Prayer with a Minyan

Is it permissible to travel to the graves of tzaddikim in a place where there will not be a minyan for the prayers? And what is the law if I want to remain there for a few more days for touring — is that more lenient because the trip began for the sake of a mitzvah? I already booked a flight under the assumption that it was permissible, and canceling it will cause me financial loss and great distress. In such a case, is it permissible after the fact, and I will be careful not to do so in the future?

Shalom u'vrachah 

In a case of financial loss, it is permissible to continue the trip. 

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