This should have been discussed with your lawyer before you plead guilty. You need to meet with the probation officer and explain your situation. See what they will permit. Ultimately the Judge can order and or change the conditions of your probation. You have to meet with your lawyer and ask these questions, if you do not have a lawyer, get one, It may take a motion filed with the Court to permit you to work.
You need to contact your attorney right away. If you didn't have an attorney you need to consult with a qualified criminal defense attorney regarding the probation issues. Contacting your probation officer may not do any good as they may not have the power to change the terms of your probation. There may be certain interstate compacts that apply that would prevent your travel to other states. International flights on your airline would be a much bigger problem.
This is probably not an insurmountable problem but it is going to take some work to resolve the issues. Usually travel modifications to probation are with regard to specific trips and specific locations. As a flight attendant you may travel to 10 states in one week and that needs to be taken into account.
Do not wait until your term of house arrest is up. It will be to late then. Contact an attorney right away so they can begin work to modify the terms of the probation if possible.