Jane Foster: Like an Einstein-Rosen Bridge?
Thor: More like a Rainbow Bridge.
Many cultures have different connotations on what a rainbow is, having made their theories long before science revealed it to just be reflection, refraction and dispersion of light in water droplets. One common idea is that this arch of color is used as a vehicle for otherworldly beings.
This form of Not Quite Flight can be read in a number of ways. Maybe they are Sky Surfing, treating the front-end of a rainbow as a surf-board surfing across the ocean of clouds. Perhaps the rest of the rainbow is a vapor trail that refracts the many colors through the air. Maybe rainbows are giant snakes that eat elephants and people and the user is just their owner, the snake their mighty steed.
Sub-Trope of Everything's Better with Rainbows and Hard Light. Compare with Flying on a Cloud, Ride the Lightning and Stairway to Heaven. See also All Your Colors Combined, Rainbow Lite and Rainbow Motif.
- In episode 4a of Tamagotchi, Mametchi invents a slide called the Rainbow Sleightchi to help him get to school on time. The slide, as suggested by the name, is meant to resemble a rainbow.
- Certain cards in Yu-Gi-Oh! create rainbow-like bridges for monsters on the field to use, like Rainbow Blessing and Rainbow Bridge Bifrost.
- In the Douwe Dabbert episode The Road to West, while walking over the eponymous magical road Douwe wonders how people on the other end will react to a road floating in the sky appearing out of nowhere. The narrator then explains that "things are not as Douwe thinks" and the scene shifts to a ship with the crew marveling at the magnificent rainbow in the sky. However, the helmsman and one of the officers do notice that something is off, as they know rainbows can normally only be seen with the sun at one's back.
- The Flash rogue named the Rainbow Raider is regularly depicted sliding through the air on a rainbow he projects from his hands, Iceman-style.
- Fantasia: After the storm in "Pastoral Symphony", the goddess Iris flies by, leaving a rainbow behind her. Cherubs and baby pegasi play around the rainbow and slide down it.
- Flower Fairy the Movie: Miracle Girl opens with Xia An'an and Kukuru flying in the sky, then sliding on a long, curvy rainbow that forms as they fly around.
- In Little Angels: The Brightest Christmas, the angels travel by turning themselves into a rainbow, each of them acting as a separate stripe.
- In The Super Mario Bros. Movie Mario was driving his kart in the rainbow, along with the characters behind him and later seen fighting the enemies on it.
- Marvel Cinematic Universe: The Bifrost is a form of dimensional energy harnessed through a crystalline, prismatic "rainbow bridge". Asgardians use this energy as a means of traveling across the universe in Faster-Than-Light Travel fashion.
- Thor: Bifrost is harnessed and controlled through Heimdall's Observatory on the edge of Asgard. Should the Bifrost be left open for too long, the energy becomes destructive and is capable of destroying planets, as is what almost happened to Jotunheim.
- Avengers: Infinity War: Following the destruction of Asgard, Heimdall is shown to be capable of using this power in short intervals, such as when he sent the Hulk back to Earth after Thanos defeats him. When Thor later receives the weapon Stormbreaker from Eitri the dwarf, he is able to use it to summon the Bifrost at will.
- Thor: Love and Thunder: By channeling Stormbreaker's energy through a mechanical ship (repurposed from a carnival ride at New Asgard and drawn by two massive goats), the ship and all its passengers are able to travel on the Biforst like a transdimensional roadway.
- The Color Wizard: In this children's book by Barbara Brenner, a wizard living in an entirely gray world gradually introduces color until the complete spectrum is present:
Narrator: "Then he dipped his brush into each color pail and sailed through the sky on a rainbow trail".
- The Spectrum from Hero can create rainbow bridges that can be walked across.
- Land of Oz: Several books in the franchise have a minor character named Polychrome the Rainbow's Daughter, a sort-of sky fairy who comes down to Earth on a rainbow, and needs the rainbow to return for her in order to get back up to the sky.
- Sweet Story: It is revealed that rainbows are used by rainbow pirates as transportation, allowing them to plunder wherever the rainbows lead and leave along with it. Considering Sally's wish made it impossible for it to ever rain water again, this link between worlds is severed forever.
- Xanth: In Centaur Aisle, the party uses a spell to ride a rainbow for rapid travel from the southern tip of Xanth up to the northern Mundane border.
- Charmed (1998): Leprechaun's can teleport through rainbows, which they light up with their shillelaghs.
- Iris from Classical Mythology was a goddess that acted as a personal messenger of Hera, rainbows being her iconic method of transportation between Earth and the Heavens. She has a sister named Arke who performed a similar role for the Titans during their war with the gods, who represented the secondary faded rainbow sometimes seen in the shadow of the more prominent one.
- The Trope Codifier here is probably from Norse Mythology, where Bifröst was the name of the rainbow bridge that connected Asgard (home of the gods) to Midgard (home of humans). The Midgard end could be moved around, but the Asgard end always connected to Heimdall's home of Himinbjörg. Like everything else in Norse Mythology it's destined to be destroyed in Ragnarok when the forces of Muspelheim storm the bridge to get to Asgard.
- Every (non-cutscene) appearance Bianca from Spyro: Year of the Dragon makes to Spyro directly has her appearing when a rainbow weaves its way through the environment before landing in-front of him, Bianca appearing from where it landed. Spyro Reignited Trilogy includes Fantastic Fireworks.
- Every game in the Mario Kart series features Rainbow Road as its final track, in which the racers drive on a rainbow floating in space (or in one case, above a city). It is so iconic to the Mario series that it appeared in a number of other games, such as a stage in Super Smash Bros. for Nintendo 3DS and Wii U or a pathway to the final dungeon in the climax of Paper Mario: Color Splash.
- In the Strong Bad Email "flashback", Strong Bad's (probably) made-up tale of how he met Homestar involves him and Coach Z riding down to Earth from the moon on a rainbow bridge.
- In The Order of the Stick, there's a rainbow bridge that connects Valhalla and the plane where Durkon meets with the gods.
- Angels of Jarm: The celestial highway that the angels use to travel from their space camper to Planet Earth is represented as a rainbow pathway.
- The Fairly Oddparents: Possibly as a deliberate Shout-Out to the Bifrost (as Butch Hartman is known to be a big comic-book geek), a rainbow bridge is the "official" entrance to Fairy World. Abra-Catastrophe! lampshades its general superfluousness, when Jorgen destroys it in response to everything going to shit in the human world:
"Sir, we usually just poof to Earth. We didn't have to destroy the bridge.""I LIKE TO DESTROY THE BRIDGE!"
- Foster's Home for Imaginary Friends: The friend/antagonist known as "Nemesister" generates a rainbow trail upon which she can travel at great speeds.
- Rainbow Brite: The titular character uses rainbow pathways to travel places, mainly between Earth and Rainbowland.
- SpongeBob SquarePants: In the episode "Life of Crime", Patrick needs money, so SpongeBob takes him to "The First National Bank of SpongeBob" by sliding down a rainbow to the pot of gold at the end (which, unfortunately, is empty).
- Uncle Grandpa: The giant Realistic Flying Tiger leaves a rainbow-colored trail behind her, which is implied to be, um... coming from her butt.
- Xiaolin Showdown: The Wings of Tinabi is a Shen Gong Wu that sprouts wings, bestowing its user the power of flight, leaving behind a rainbow trail in the process.