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Nature of Operations and Summary of Significant Accounting Policies - Property and Equipment (Details) | 12 Months Ended
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Dec. 31, 2021
Aircraft and rotable spares | Maximum [Member] |
Property and Equipment |
Depreciable Life | 22 years
Residual Value (as a percent) | 20.00%
Ground equipment |
Property and Equipment |
Residual Value (as a percent) | 0.00%
Ground equipment | Maximum [Member] |
Property and Equipment |
Depreciable Life | 10 years
Office Equipment [Member] |
Property and Equipment |
Residual Value (as a percent) | 0.00%
Office Equipment [Member] | Maximum [Member] |
Property and Equipment |
Depreciable Life | 7 years
Leasehold Improvements [Member] |
Property and Equipment |
Residual Value (as a percent) | 0.00%
Leasehold Improvements [Member] | Maximum [Member] |
Property and Equipment |
Depreciable Life | 15 years
Building [Member] |
Property and Equipment |
Residual Value (as a percent) | 0.00%
Building [Member] | Minimum [Member] |
Property and Equipment |
Depreciable Life | 20 years
Building [Member] | Maximum [Member] |
Property and Equipment |
Depreciable Life | 39 years 6 months

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- References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Stated as a percentage, the estimated or actual value of the asset at the end of its useful life or when it is no longer serviceable (cannot be used for its original purpose) divided by its [historical] capitalized cost. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentSalvageValuePercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=skyw_AircraftAndRotableSparesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=skyw_GroundEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_OfficeEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LeaseholdImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |