1-800 Number

Hi Guys,
I need to call a USA booking number to book some flights. I have 100mins included in my plan for international calling but when i did a test call it said its a Premium number. It's important i call this number so if im going to get charged. How much is a US 1-800 number going to cost me per min?
TIA

guppy02 Never mind. I just realised my error i droped the 1 and added +1 to the number. Works fine now