There is no published cost per lead benchmark for flight training. The closest defensible proxy is Google's Education and Instruction category, drawn from 13,474 US campaigns between April 2025 and March 2026. That category blends tutoring and online courses, so treat it as a ceiling to plan against rather than a number to expect.
Run the arithmetic at both ends. A $4.81 click at a 13.14% conversion rate is about $37 per lead. A $6.23 click at 11.38% is about $55. Push it to an aviation head-term bid of $7.39 at a more cautious 8% and you get about $92.
So a lead costs somewhere between $37 and $92 in media. Google's own guidance is that a bid strategy needs at least 30 conversions in 30 days before anyone can judge it. That puts the floor near $1,100 to $2,800 a month in Google Search media alone. It is why we suggest starting at $3,000 across channels, and why a $500 test proves nothing except that $500 was not enough.
Then keep walking the chain. Cost per lead divided by your show rate gives cost per discovery flight flown. Divide that by your close rate and you have cost per enrollment. Two of those numbers can only come from your own records, which is the whole argument for measuring them.
For a downstream check, two publicly traded career-education companies disclose both advertising spend and new student starts in their annual filings. Across FY2023 to FY2025 that works out to $2,310 to $3,193 of media per new student start, over roughly 50,700 starts. It is a proxy from trade and technical education rather than flight training, and it counts media only, not admissions staff. It is also audited, which is more than any number a competitor will quote you.