Most Similar Movies to Diary of a Wimpy Kid: The Long Haul (2017)
If you are looking for movies like Diary of a Wimpy Kid: The Long Haul (2017), you might like movies tagged with keyword : boy, nerd, friend, geek, mother, father, amusing, hilarious, hysterical, lighthearted, car, road, motel, boathouse, road trip, mishaps, parent/child relationship, friendship, adventure, discovery, temptation, underdog, 2010s .
Vacation (2015), Spy Kids (2001), Alvin and the Chipmunks: The Road Chip (2015), Josh and S.A.M. (1993), Cheaper by the Dozen 2 (2005), The Croods (2013), College Road Trip (2008) ... Let's take a look at the following list...

Vacation (2015)
Rusty Griswold takes his own family on a road trip to "Walley World" in order to spice things up with his wife and reconnect with his sons.
Stream Full Movie

Alvin and the Chipmunks: The Road Chip (2015)
The Chipmunks believe that Dave plans to propose to his new girlfriend in Miami.--and dump them. They have three days to get to him and save themselves not only from losing Dave but also from gaining a terrible stepbrother.
Stream Full Movie
Josh and S.A.M. (1993)
After their parents divorce, 12-year-old Josh (Jacob Tierney) and 7-year-old Sam (Noah Fleiss) decide to go on an underage road trip. Sick of being ferried between their distant mother and remarried father, Josh and his brother steal a car and set out for Canada. The runaways' journey gets more interesting when they pick up a drifter named Alison (Martha Plimpton). More bizarre yet, Josh has convinced his little brother that he's a "Strategically Altered Mutant."
Stream Full Movie
Cheaper by the Dozen 2 (2005)
The Bakers, while on vacation, find themselves competing with a rival family of eight children.
Stream Full Movie
The Croods (2013)
After their cave is destroyed, a caveman family must trek through an unfamiliar fantastical world with the help of an inventive boy.
Stream Full Movie
College Road Trip (2008)
James Porter (Martin Lawrence) drives his teenage daughter Melanie (Raven Symone), from their home in Chicago to a college interview in Washington, D.C.
Stream Full Movie
Meet the Robinsons (2007)
Lewis is a brilliant inventor who meets mysterious stranger named Wilbur Robinson, whisking Lewis away in a time machine and together they team up to track down Bowler Hat Guy in a showdown that ends with an unexpected twist of fate.
Stream Full Movie
The Kid (2000)
An unhappy and disliked image consultant gets a second shot at life when he is mysteriously confronted by an eight-year-old version of himself.
Stream Full Movie
Captain Ron (1992)
A Chicagoan inherits an old yacht. He, his wife, daughter and son fly to a Caribbean island and hire a dubious Captain Ron to sail them on an adventure to Miami.
Stream Full Movie

A Goofy Movie (1995)
When Max makes a preposterous promise to a girl he has a crush on, his chances to fulfilling it seem hopeless when he is dragged onto a cross-country trip with his embarrassing father, Goofy.
Stream Full Movie
Moomins on the Riviera (2014)
The Moomins set sail for the Riviera, where, after a journey fraught with storms and desert island dangers, Snorkmaiden is dazzled by the attentions of a playboy and Moomin learns that jealousy's sting is the most painful of all.
Stream Full Movie
The Rugrats Movie (1998)
The babies gets lost in the forest after Tommy gets a new baby brother.
Stream Full Movie
Dolittle (2020)
A physician who can talk to animals embarks on an adventure to find a legendary island with a young apprentice and a crew of strange pets.
Stream Full Movie
National Lampoon's European Vacation (1985)
The Griswolds win a vacation tour across Europe where the usual havoc ensues.
Stream Full Movie
Parental Guidance (2012)
Artie and Diane agree to look after their three grandkids when their type-A helicopter parents need to leave town for work. Problems arise when the kids' 21st-century behavior collides with Artie and Diane's old-school methods.
Stream Full Movie
Pieces of April (2003)
A wayward daughter invites her dying mother and the rest of her estranged family to her apartment for Thanksgiving dinner.
Stream Full Movie