מצוה חביבה היא עד מאד

Mori V'Rabi Harav Hagaon R. Shlomo Miller shlita said,

"Instead of arranging the timing of הדלקת נרות

so it won't interfere with your travels, you should 

rather arrange the timing of your travels so it won't 

interfere with the הדלקת נרות.

Lighting Ner Chanukah is the only Mitzvah that the 

Rambam writes (Hl. Chanukah 4:12) מצוה חביבה היא עד מאד  

(most beloved Mitzvah) 

The Rambam also writes והדלקת נרות - כקריאת מגילה 

Perhaps the Rambam meant that  the same

way קריאת מגילה is דוחה all Mitzvos even דאורייתא

(except Meis Mitzvah) so too הדלקת נרות is דוחה all

Mitzvos.

Being it is such a great Mitzvah one should try to

avoid traveling if it will interfere with this beloved and

important Mitzvah."