Lockheed Martin, Boeing and Airbus are among the companies that could potentially make first-round bids later this month, sources told the newspaper. A Sikorsky sale could go for about $10 billion, according to the report.
The company's board of directors authorized a review of strategic alternatives for Sikorsky earlier this year.
"As previously announced, UTC is exploring strategic alternatives for Sikorsky, which could include a sale or spinoff. We continue to expect the evaluation will be completed by midyear," a United Technologies spokesman told CNBC in response to the report.