Mila Kunis was spotted wearing a Chanel Mademoiselle Maxi Bag at LAX. Picture is old from last summer (2011) since she did endorse Dior for a period of time although I believe she's been replaced by Marion Cottilard, one my favorite french actors.
About the Bag
The Maxi version of the Mademoiselle bag is quite large although Mila Kunis is quite petite. The Maxi is 18"W x 11"H x 9"D, which at 18" already constitutes a large travel bag and not really a tote.