Subsequent Events (Details)	1 Months Ended	6 Months Ended
Subsequent Events (Details)	Jul. 31, 2025 aircraft engine	Jun. 30, 2025 engine aircraft
Subsequent Event
Subsequent Event [Line Items]
Number of aircraft to be outfitted with engines	91
Number of additional spare engine commitments \| engine	28
Number of delivered aircraft	1
Aircraft
Flight Equipment Commitments [Abstract]
Remainder of 2025		13
2026		23
2027		34
2028		34
2029		36
Thereafter		40
Total		180
Aircraft \| Subsequent Event
Flight Equipment Commitments [Abstract]
Remainder of 2025	12
2026	23
2027	34
2028	34
2029	36
Thereafter	40
Total	179
Engines
Flight Equipment Commitments [Abstract]
Remainder of 2025 \| engine		0
2026 \| engine		4
2027 \| engine		3
2028 \| engine		2
2029 \| engine		0
Thereafter \| engine		0
Total \| engine		9
Engines \| Subsequent Event
Flight Equipment Commitments [Abstract]
Remainder of 2025 \| engine	16
2026 \| engine	2
2027 \| engine	3
2028 \| engine	2
2029 \| engine	5
Thereafter \| engine	9
Total \| engine	37
A320neo \| Aircraft
Flight Equipment Commitments [Abstract]
Remainder of 2025		7
2026		8
2027		8
2028		4
2029		0
Thereafter		0
Total		27
A320neo \| Aircraft \| Subsequent Event
Flight Equipment Commitments [Abstract]
Remainder of 2025	7
2026	8
2027	8
2028	4
2029	0
Thereafter	0
Total	27
A321neo \| Aircraft
Flight Equipment Commitments [Abstract]
Remainder of 2025		6
2026		15
2027		26
2028		30
2029		36
Thereafter		40
Total		153
A321neo \| Aircraft \| Subsequent Event
Flight Equipment Commitments [Abstract]
Remainder of 2025	5
2026	15
2027	26
2028	30
2029	36
Thereafter	40
Total	152

Frontier Group Holdings, Inc. 10-Q