Hawaiian Airlines could become the first domestic airline to code-share with JetBlue Airways and only the second of the New York-based carrier’s 15 partners to do so, if the U.S. government approves a new deal between the two operators.

JetBlue prefers interlining to code-sharing, arguing that its policy requires little commitment to the partner airline. However, under an arrangement unveiled Jan. 23, Hawaiian could eventually place it’s ‘HA’ designator code on an unspecified number of JetBlue services.

The code-share, though, will be one-way, with JetBlue maintaining the interline agreement the two airlines signed this week. Hawaiian tells Aviation Week the code-share simply maintains a consistency with its other airline partnerships.

The Honolulu-based carrier is set to operate a nonstop Airbus A330-200 service to JetBlue’s John F. Kennedy International base from June. 5. Hawaiian will be the only airline other than JetBlue to operate from Terminal 5.

If the code-share is approved, Hawaiian will become the second airline after Lufthansa to code-share with JetBlue, but without the share purchase that accompanied the German carrier’s accord. JetBlue also partners with 13 other airlines, including American Airlines, but these are all limited to interline agreements.

Hawaiian expects the code-share and a reciprocal frequent flyer deal to be implemented in the second quarter.