It would have had little effect.
The attack would have happened (nothing could have prevented it on 7 Dec after the Japanese aircraft took off. )
The US would still have declared war and still would have had the emotional motivation of a "sneak attack".
The actual amount of damage might be less. It is tough to tell how effective US pilots would have been against the attacking forces. The Japanese were expecting some US air cover so they would not have been totally surprised.
The outcome?
Perhaps a few less US ships sunk/damaged
Perhaps a few more Japanese aircraft shot down
But other than that, I don't see how history would have been changed.
Now if the scenario were changed to "what if the US carriers found the Japanese carriers before the attack" That might be interesting.
But 30-60 minute advance notice of the attack on PH probably would not have made much difference in the big picture.
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