This communication conveys results from a study evaluating the liftoff height of flames burning jet-A and a surrogate fuel in MILD conditions. For some coflow conditions, the liftoff height of the surrogate fuel was higher than the jet fuel (i.e., 13001< and 3% O-2) while for other conditions the liftoff heights were statistically equivalent (i.e., 1500K and 3% O-2). Distributions of CH2O were measured using planar laser induced fluorescence (PLIF) to help further identify similarities and differences between the flames. Jet-A flames produced a broader region of CH2O for some conditions. Greater concentrations of CH2O agrees with liftoff height trends and results presented previously for small hydrocarbon fuels. (C) 2019 The Combustion Institute. Published by Elsevier Inc. All rights reserved.