| Document and Entity Information | Aug. 18, 2023 |
| Document And Entity Information [Line Items] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001846968 |
| Document Type | 8-K |
| Document Period End Date | Aug. 18, 2023 |
| Entity Registrant Name | Cascadia Acquisition Corp. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-40762 |
| Entity Tax Identification Number | 86-2105250 |
| Entity Address, Address Line One | 1000 2nd Avenue |
| Entity Address, Address Line Two | Suite 1200 |
| Entity Address, City or Town | Seattle |
| Entity Address, State or Province | WA |
| Entity Address, Postal Zip Code | 98104 |
| City Area Code | (206) |
| Local Phone Number | 436-2550 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Class A Common Stock Subject To Possible Redemption [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Units, each consisting of one share of Class A common stock, $0.0001 par value, and one-half of one Redeemable Warrant |
| Trading Symbol | CCAIU |
| Security Exchange Name | NASDAQ |
| Common Class A [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Shares of Class A common stock |
| Trading Symbol | CCAI |
| Security Exchange Name | NASDAQ |
| Warrant [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Redeemable Warrants |
| Trading Symbol | CCAIW |
| Security Exchange Name | NASDAQ |
