Rate constants for the reactions of OH radicals with fluoroethane (CH₃CH₂F), 1,2-difluoroethane (CH₂FCH₂F), and 1,1-difluoroethane (CH₃CHF₂) were measured using the flash photolysis resonance-fluorescence technique over the temperature range of T = 210-480 K. Arrhenius plots for all three reactions exhibit noticeable curvature, and the rate constants are well represented by three-parameter modified Arrhenius expressions over the full experimental temperature range, with better than 3% precision: k_CH3CH2F(T)  = 3.14×10^-13×(T/ 298)^2.45×exp{-103/T} cm³molecule^-1s^-1, k_CH2FCH2F(T) = 4.33×10^-14×(T/298)^3.85×exp{+247/T} cm³molecule^-1s^-1, and k_CH3CHF2(T) = 7.72×10^-14×(T/298)^3.02×exp{-247/T} cm³ molecule^-1s^-1. For the temperature range of atmospheric interest (T < 300 K), the rate constants can be well represented by standard (two-parameter) Arrhenius expressions. On the basis of all the available low-temperature data, the following rate constants are recommended for atmospheric modeling: k_CH3CH2F(T < 300 K) = 2.55×10^-12×exp{-730/T} cm³molecule^-1s^-1, k_CH2FCH2F(T < 300 K) = 1.12×10^-12×exp{-730/T} cm³ molecule^-1s^-1, and k_CH3CHF2(T < 300 K) = 0.94×10^-12×exp{-990/T} cm³molecule^-1s^-1. Using these recommendations, atmospheric lifetimes were estimated to be ca. 2.4 months, 5.5 months, and 1.4 years for CH₃CH₂F, CH₂FCH₂F, and CH₃CHF₂, respectively.