Origin of travel
usage note for travel
The word travel has come to exemplify a common spelling quandary: to double or not to double the final consonant of a verb before adding the ending that forms the past tense ( –ed ) or the ending that forms the present-participle ( –ing. ) We see it done both ways—sometimes with the same word ( travel, traveled, traveling; travel, travelled, travelling ). As readers, we accept these variations without even thinking about them. But as writers, we need to know just when we should double that final consonant and when we should not. Because American practice differs slightly from British practice, there is no one answer. But there are well-established conventions.
In American writing, when you have a one-syllable