When I travel now instead of lugging a clunky hair dryer along with all my brushes, I invested in this all-in-one Foxybae rose gold hair dryer brush combo. And best thing ever. Seriously. I do also bring a tiny iron for stray pieces but between the two, the extra space in my luggage is well worth it.
The convenience of it is one thing but it really blows my hair straight (the way I like) and gives it a little volume. If you spend lots of time on your hair, and lots of tools, try this.