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 x 10(-13)(T/298)(2.45) exp{-103/T} cm(3) molecule(-1) s(-1), kCH(2)FCH(2)F(T) = 4.33 x 10(-14)(T/298)(3.85) exp{+247/T} cm(3) molecule(-1) s(-1), and k(CH3CHF2)(T) = 7.72 x 10(-14)(T/298)(3.02) exp{-247/T} cm(3) molecule(-1) s(-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: kCH(3)CH(2)F(T < 300 K) = 2.55 x 10(-12) exp{-730/T} cm(3) molecule(-1) s(-1), k(CH2FCH2F)(T < 300 K) = 1.12 x 10(-12) exp{-730/T} cm(3) molecule(-1) s(-1), and k(CH3CHF2)(T < 300 K) = 0.94 x 10(-12) exp{-990/T} cm(3) molecule(-1) s(-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.