Reference: I’laam al-Mu’aasireen bi-Fataawa Ibn ‘Uthaymeen – Page 141
Question: Is there a specific salaah (prayer) for [once you have entered] the state of ihraam?
Response: There is no specific salaah for [once you have entered] the state of ihraam. However, if a person arrives at the meeqaat and the time for an obligatory prayer is [fast] approaching, then it is better he delays entering the state of ihraam until he performs the obligatory prayer and thereafter enters the state of ihraam.