v3.26.3
Document and Entity Information - shares
9 Months Ended
Sep. 30, 2026
Nov. 13, 2026
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2026  
Document Fiscal Year Focus 2026  
Document Transition Report false  
Entity File Number 001-43006  
Entity Registrant Name ITHAX ACQUISITION CORP III  
Entity Incorporation, State or Country Code E9  
Entity Tax Identification Number 00-0000000  
Entity Address, Address Line One 826 Collins Avenue  
Entity Address, Adress Line Two Suite 201  
Entity Address, City or Town Miami  
Entity Address State Or Province FL  
Entity Address, Postal Zip Code 33139  
City Area Code 305  
Local Phone Number 469-0917  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company true  
Entity Central Index Key 0002080985  
Current Fiscal Year End Date --12-31  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Units, each consisting of one Class A ordinary share and one-half of one redeemable warrant    
Title of 12(b) Security Units, each consisting of one Class A ordinary share and one-half of one redeemable warrant  
Trading Symbol ITHAU  
Security Exchange Name NASDAQ  
Class A ordinary shares    
Title of 12(b) Security Class A ordinary shares, par value $0.0001 per share  
Trading Symbol ITHA  
Security Exchange Name NASDAQ  
Entity Common Stock, Shares Outstanding   23,000,000
Warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share    
Title of 12(b) Security Warrants, each whole warrant exercisable for one Class A ordinary share at an exercise price of $11.50 per share  
Trading Symbol ITHAW  
Security Exchange Name NASDAQ  
Class B ordinary shares    
Entity Common Stock, Shares Outstanding   7,666,667