The following is a comprehensive list of modern open-source fonts that support IPA symbols. The fonts with the best IPA coverage include Charis and Gentium Plus, which were designed specifically for linguists, as well as Google's Noto Sans and Noto Serif, which have been designed with the goal of covering as many Unicode symbols as they can and are still being periodically updated (noting that no font in existence covers all 136,690 Unicode characters).
Some fonts on this list have incomplete coverage (which you will see marked by X's) and/or positioning issues with diacritics. Various Microsoft fonts also support IPA symbols extensively: Arial, Calibri, Cambria, Consolas, Courier New, Lucida Sans Unicode, Segoe UI, Tahoma and Times New Roman.
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