Cover - USD ($)	12 Months Ended
Cover - USD ($)	Dec. 31, 2024	Jun. 30, 2024
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Transition Report	false
Document Financial Statement Error Correction [Flag]	false
Entity Interactive Data Current	Yes
ICFR Auditor Attestation Flag	false
Amendment Flag	false
Document Period End Date	Dec. 31, 2024
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	FY
Documents Incorporated by Reference [Text Block]	Portions of the Prospectus filed by the registrant on February 11, 2019 pursuant to rule 424(b)(3) of the Securities Act (File No. 333-210313) are incorporated by reference into Part I and Part II of this report.
Entity Information [Line Items]
Entity Registrant Name	FRONTIER FUNDS
Entity Central Index Key	0001261379
Entity File Number	000-51274
Entity Tax Identification Number	36-6815533
Entity Incorporation, State or Country Code	DE
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Public Float		$ 0
Entity Contact Personnel [Line Items]
Entity Address, Address Line One	c/o Frontier Fund Management, LLC
Entity Address, Address Line Two	25568 Genesee Trail Road
Entity Address, City or Town	Golden
Entity Address, State or Province	CO
Entity Address, Postal Zip Code	80401
Entity Phone Fax Numbers [Line Items]
City Area Code	(303)
Local Phone Number	454-5500
Entity Listings [Line Items]
Title of 12(b) Security	N/A
No Trading Symbol Flag	true
Security Exchange Name	NONE
Frontier Diversifieds Fund
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding	16,365
Frontier Masters Fund
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding	4,813
Frontier Long Shorts Commodity Fund
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding	6,199
Frontier Balanced Fund
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding	56,262
Frontier Select Funds
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding	14,767
Frontier Global Funds Member
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding	7,305
Frontier Heritage Fund
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding	13,354

Frontier Funds 10-K