Talented midfielder O'Neil has impressed for England's Under-21 side in recent internationals and is eager to get more playing time under his belt.
Frustrated at a lack of opportunity at in-form Pompey, O'Neil has requested a move away from the South Coast.
''I find it frustrating. I've asked the boss numerous times and he always says the same thing - there is no reason you're not in the side, you're fighting for your place and you'll get your games,'' said O'Neil.
''Obviously there is always a stage where you have to move on but I have three years left on my contract and I'm happy at Portsmouth.''
Meanwhile, full-back John Curtis has expressed a similar frustration.
''If I am not playing for Portsmouth I need to be playing elsewhere,'' conceded Curtis.
''I'm at the stage of my career where reserve team football isn't good enough.''
