Based on DAN WORLDWIDE recommendation, the Suggested Minimum Surface Interval before flying is:-
– Single Day – no deco dive: 12 + hours
– Multi-day or repetitive no deco dives: 18+ hours
– Mandatory Deco dives: 24+ hours
And from DAN EUROPE:
At least 12 hours after a single dive and at least 24 hours after repetitive dives and/or deco diving.