To call Iberia Airlines from the USA, follow these steps:

1. Dial the international access code: 011
2. Dial the country code for Spain: 34
3. Dial the Iberia Airlines phone number: 901 111 500

Your final phone number should look like this: 011 34 901 111 500

But remember that international calling rates may apply, so check with your phone carrier for details on any fees that may be associated with making an international call.