Planes Movies: Release Order
The Planes films are a spin-off of Pixar's Cars franchise, though they were produced by the now-defunct DisneyToon Studios rather than Pixar itself. The duology follows Dusty Crophopper, a crop duster with big dreams despite his fear of heights.
The first film sees Dusty competing in the Wings Around the Globe Rally against international racing competition, while the sequel shifts gears into action-disaster territory when Dusty retrains as a wildland firefighter after sustaining a career-ending injury. A third film titled Beyond the Sky was planned to explore aviation in outer space, but was cancelled when DisneyToon Studios shut down in 2018.
Linear Timeline: Release Order = Story Order

Planes
A crop-dusting plane named Dusty dreams of competing in a famous aerial race, but must overcome his fear of heights with help from his mentor and new friends.

Planes: Fire & Rescue
When air racer Dusty's damaged engine ends his racing career, he joins an aerial firefighting team led by veteran helicopter Blade Ranger. Together with The Smokejumpers, they must battle a massive wildfire while Dusty discovers what it truly means to be a hero.
Other Film Series
Cars
Pixar's animated trilogy following race car Lightning McQueen's journey from hotshot rookie to mentor, set in a world of anthropomorphic vehicles.
Ice Age
A family-friendly animated series following prehistoric friends Manny, Sid, and Diego through various ice age adventures.
Madagascar
Animated adventure series following zoo animals on wild adventures around the world.
Pixar
Pioneering animation studio behind groundbreaking computer-animated films from Toy Story to modern masterpieces.
The Land Before Time
An animated dinosaur franchise following young dinosaurs on their adventures, beginning with Don Bluth's acclaimed 1988 film.
Winnie the Pooh
Disney's beloved animated and live-action films based on A.A. Milne's classic stories about a honey-loving bear and his friends in the Hundred Acre Wood.