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We present measurements of methane (CH₄) taken aboard a NOAA WP‐3D research aircraft in 2013 over the Haynesville shale region in eastern Texas/northwestern Louisiana, the Fayetteville shale region in Arkansas, and the northeastern Pennsylvania portion of the Marcellus shale region, which accounted for the majority of Marcellus shale gas production that year. We calculate emission rates from the horizontal CH₄ flux in the planetary boundary layer downwind of each region after subtracting the CH₄ flux entering the region upwind. We find 1 day CH₄ emissions of (8.0 ± 2.7) × 10⁷ g/h from the Haynesville region, (3.9 ± 1.8) × 10⁷ g/h from the Fayetteville region, and (1.5 ± 0.6) × 10⁷ g/h from the Marcellus region in northeastern Pennsylvania. Finally, we compare the CH₄ emissions to the total volume of natural gas extracted from each region to derive a loss rate from production operations …