Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2022	Aug. 15, 2022
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2022
Document Transition Report	false
Entity Registrant Name	FRONTIER ACQUISITION CORP.
Entity Incorporation, State or Country Code	E9
Entity File Number	001-40197
Entity Tax Identification Number	98-1578395
Entity Address, Address Line One	667 Madison Avenue, 19th Floor
Entity Address, City or Town	New York
Entity Address State Or Province	NY
Entity Address, Postal Zip Code	10065
City Area Code	212
Local Phone Number	803-9080
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	0001842223
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
Amendment Flag	false
Units, each consisting of one Class A ordinary share, $0.0001 par value, and one-fourth of one redeemable warrant
Document Information [Line Items]
Title of 12(b) Security	Units, each consisting of one Class A ordinary share, $0.0001 par value, and one-fourth of one redeemable warrant
Trading Symbol	FRONU
Security Exchange Name	NASDAQ
Class A common stock
Document Information [Line Items]
Title of 12(b) Security	Class A ordinary shares included as part of the units
Trading Symbol	FRON
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		23,660,000
Redeemable Warrants Exercisable For Class Common Stock
Document Information [Line Items]
Title of 12(b) Security	Redeemable warrants included as part of the units
Trading Symbol	FRONW
Security Exchange Name	NASDAQ
Class B common stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		5,750,000