French carrier SFR has posted the Android 4.4 KitKat update plans for the LG G2 and the flagship Sony Xperia phones.
The 4.4.2 update for LG's flagship will arrive over the air on March 3. Note that the KitKat update for the AT&T G2 and Korean G2 is already available, but this should get the ball rolling for all G2's with no update yet.
The current Sony flagship models Xperia Z1, Z1 Compact and Z Ultra will get KitKat in April. The Xperia Z1 and Z Ultra were updated to Android 4.3 Jelly Bean in mid-December (Z1 Compact launched with 4.3).
Note that this update schedule applies for SFR and your carrier might be on a different schedule.