Answer: No.
iPhone 15 Plus Size: 160.87 x 77.76 x 7.81 mm
iPhone 14 Plus Size: 160.84 x 78.07 x 7.79 mm
In terms of appearance and specifications, iPhone 14 Plus is very similar to iPhone 15 Plus. The iPhone 15 Plus can indeed be put into the iPhone 14 Plus case, which seems to have no problem. However, the change of the volume control of the iPhone 15 ,it cannot be installed perfectly.
So, you’d better reinvest and buy a new iPhone 15 Plus case.

Will iPhone 15 Plus Case Fit the iPhone 14 Plus?
The answer is possible, which depends on who made the iPhone 15 Plus case. If it is made by a third party manufacturer, it may match. If it is an official cover made by Apple, it may not match.
For Apple Company, this means that every customer with the new iPhone 15 Plus mobile phone will buy a brand new phone case, and preferably from the official website, so as to increase its revenue.
Now you don’t need to cost a lot to buy an expensive iPhone15 Plus phone case. Many third-party iPhone 15 accessories also provide the same protection. You can buy them at a lower price on online shopping websites such as CaseMe.
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