v3.26.1
Cover - shares
6 Months Ended
Jun. 30, 2025
Jun. 25, 2026
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2025  
Document Transition Report false  
Entity File Number 001-34584  
Entity Registrant Name HARBOR DIVERSIFIED, INC.  
Entity Incorporation State Country Code DE  
Entity Tax Identification Number 13-3697002  
Entity Address Address Line1 5601 W Grande Market Drive  
Entity Address Address Line2 Suite C  
Entity Address City Or Town Appleton  
Entity Address State Or Province WI  
Entity Address Postal Zip Code 54913  
City Area Code 920  
Local Phone Number 862-8370  
Entity Current Reporting Status No  
Entity Interactive Data Current No  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   58,429,836
Entity Central Index Key 0000899394  
Current Fiscal Year End Date --12-31  
Amendment Flag false  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2