The iPhone may be headed to the Netherlands later this month on T-Mobile, according to a new report. Citing a source within the company, All About Phones (Translated Link) says that the iPhone will be hitting the Dutch market soon, possibly as early as late March, and will be offered by T-Mobile. This report follows recent developments that suggest Apple may be planning to roll out the iPhone in more European countries. Carrier-specific files found in the latest version of the iPhone’s software suggested that the device would soon be coming to T-Mobile in Austria, Telecom Italia Mobile in Italy, and O2 in Ireland. Previous reports have also suggested that Telefonica SA will offer the phone in Spain. T-Mobile Austria has confirmed that it begin selling the iPhone in the first half of 2008, while O2 Ireland last week announced that it will be launching the device on March 14. In addition, Morgan Stanley analyst Kathryn Huberty recently noted that Apple spent $550,000 on Steve Jobs’ airplane expenses in the fourth quarter, around three times the average over the prior six quarters. Huberty said that Jobs is “integral to negotiations with international carriers and supply chain partners,” meaning that much of his travel may have been to close deals with potential iPhone carriers.