Kim Kardashian -- I'm Flying to Texas to Save Khloe

Big sister to the rescue -- TMZ has learned, Kim Kardashian just boarded a plane to Dallas because Khloe is in desperate need of help ... moving into her new house.

As we previously reported, Khloe's husband Lamar Odom has been traded to the Dallas Mavericks ... but sources tell TMZ, ever since the couple found a place to live in town -- a $7,500-a-month condo at the W Hotel -- Khloe's been freaking out about moving in.

We're told Khloe really needed a sister around for support -- so, Kim hopped a jet this morning at LAX (above) to help her sis with the transition process ... moving Khloe's stuff in, getting settled, stimulating the local economy, etc.