Two I have and recommend, although they’re more sci-fi with some comedic moments are The Martian (nearly 11 hours) and Snowcrash (17ish hours).
The writing style of The Martian, being mostly (not exclusively) an audiolog lends itself to the audiobook format, and Snowcrash is always a ton of fun.
Otherwise, my favorite audiobook for travelling is the extended version of the World War Z (12ish hours) - since it’s also based on ‘interviews’ and works well as an audiobook, and as a bonus has huge scifi actor cast, it is excellent. And since each piece is shorter, you have a lot of chances to pause easily if you need to stop the trip for food/bladder breaks.
Have a safe trip!