XML 543 R48.htm IDEA: XBRL DOCUMENT v3.22.0.1

Summary of Significant Accounting Policies Allways Rewards Loyalty Program (Details) - Allways Rewards Loyalty Program	1 Months Ended
	Aug. 31, 2021 point
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number Of Points Earned For Every Dollar Spent	1
Number Of Points Earned For Every Dollar Spent Over Five Hundred Dollars	2

X

- Definition

Number Of Points Earned For Every Dollar Spent

+ References

No definition available.

+ Details

Name:	algt_NumberOfPointsEarnedForEveryDollarSpent
Namespace Prefix:	algt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number Of Points Earned For Every Dollar Spent Over Five Hundred Dollars

+ References

No definition available.

+ Details

Name:	algt_NumberOfPointsEarnedForEveryDollarSpentOverFiveHundredDollars
Namespace Prefix:	algt_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	algt_RewardsPlanNameAxis=algt_AllwaysRewardsLoyaltyProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: