SamBucky

Winter Falcon is the slash ship between Bucky Barnes and Sam Wilson from the Marvel Cinematic Universe fandom.

Canon
Bucky and Sam became were close allies when fighting during the accords and had encountered each other when Bucky was still in the hands of HYDRA,

Captain America: The Winter Soldier
Steve, Sam, and Natasha had kidnapped Jasper Sitwell, one of the undercover HYDRA agents working for SHIELD, and had taken the freeway when they encountered the Winter Soldier, who threw Jasper out of the car into a passing truck, killing him. Before the Soldier could assassinate Steve and Sam, Sam immediately pushed down on the brakes, resulting in the Winter Soldier getting thrown off the car.

This did not stop him, however, as he slowed himself down with his metal arm before charging back at the car and ripping out the steering wheel, causing the car to lose control and crash. Everyone got out of the car before Winter fired a grenade launcher, which Steve took with his shield, sending him plummeting into a bus below.

Winter then targeted Natasha, who eventually temporarily disabled Winter's metal arm and strangled him. Soon, Winter was close to eliminating Natasha, but was saved by Steve, who fought Winter.

After it is revealed that the Winter Soldier is Bucky Barnes by Steve, Winter is left confused and attempts to shoot Rogers, but is quickly kicked down by Sam when he flew down on is Falcon suit. Winter then disappeared, a unit of STRIKE agents taking Steve, Sam, and Natasha into custody. This fails though, as Maria Hill went undercover and saved the trio.

Captain America: Civil War
As the power goes out, Steve realizes that the man who framed Bucky is the one interrogating him, and he and Sam run down to the room finding all the guards unconscious. Steve enters the room and confronts the intergator. Sam walks in and a brainwashed Bucky takes a swing at him, Sam ducking just in time. Bucky is able to punch him in the gut and throw him across the room, knocking him out.

Bucky wakes up, his arm locked in a machine, with Sam watching him. Sam calls over Steve and the three start to talk. Steve belives that they're talking to Bucky without mind control, but Sam asks if that makes everything automatically okay. Bucky tells them that Zemo was looking for the other Winter Soldiers. Sam asks if they all turned out like him, and Bucky says that they were worse. Sam tells Steve that this would have been easier a week ago, and they don't know if the accords will allow Tony to help.

The three steel a car and meet up with Sharon Carter for their equipment. While Steve gets their stuff, Sam and Bucky sit in the car, Sam in front, Bucky in back. Bucky asks Sam to move his seat up, but Sam just deadpans "no". Bucky scoots to the side, Sam glancing back at him. They watch Steve kiss Sharon, and when he turns around they both nod their heads and smile, embarrassing him.

As Bucky and Sam run through the airport, they see Spider-Man climb along the outside windows. Bucky asks what that is, but Sam just comments on everyone having a gimmick. Spider-Man then swings around and knocks through the window, and kicking Sam to the side. He then goes to punch Bucky, who stops him, and Sam gets up and flies him away from Bucky.

As Spider-Man chases after Sam, Bucky throws some debris at him to distract him, but it gets thrown back in his face. Sam is brought down by Spider-Man and webbed against the railing. As Spider-Man swings to kick Sam, Bucky runs in front of him and takes the hit, sending them both to the lower floor. Spider-Man webs them both, but Sam sends Red Wing to remove him before he can make an official arrest. Bucky tiredly asks if he couldn't have done that earlier, Sam replying that he hates him.

Avengers: Infinity War
Steve and Bucky don't end up meeting, but both fought in Wakanda at the time. The two both turn to dust as a result of the Decimation, or Thanos' Snap.

Age of Ultron

 * Sam tells Steve that he's perfectly okay looking for cold leads on Bucky.

Civil War

 * Sam reminds Steve that Bucky would have helped him in 1945, not so much now.
 * Steve tells Sam where Bucky is.
 * Sam knocks away the Helicopter that is shooting at Bucky.
 * Sam follows Bucky and Steve under the bridge.
 * Sam and Bucky are both arrested.
 * Sam looks over at Bucky as he's taken away by authorities.
 * Sam watches Bucky get interrogated.
 * Sam reminds Steve that when they looked for Bucky for two years they couldn't find him.
 * Bucky and Sam meet with Clint and Scott.
 * Bucky and Sam search for the Quinjet as Steve confronts Team Iron Man.
 * Rhodey scans the airports and see's Sam and Bucky running through the terminal.
 * Sam sees Bucky get webbed by Spider-Man.
 * Bucky and Sam run side by side as the join the rest of Team Cap.
 * Sam tells Bucky and Steve that they need to leave.

Avengers: Infinity War

 * Bucky and Sam watch as the first of Thanos' forces hit the shield around Wakanda.
 * Bucky tells Sam that he loves Wakanda when the shields protect them.

Behind the Scenes
"Somebody the other day said, 'You know what the real love story is? The Falcon and Winter Soldier.'"

- Sebastian Stan

"It only took about four press tours for someone to kind of get the idea, that these two lunatics, should have a show."

- Sebastian on The Winter Soldier and Falcon

Fanon
Not being a very popular ship among the Marvel Cinematic Universe fandom, there isn't a lot of fanfiction compared to more popular ships, like Stucky or Stony. There were some who shipped them in the comics, and would combine some of their 616 characteristics with their MCU counterparts, which is common for fans of both. Some fans started shipping them from The Winter Soldier most based it on the press tour interviews between actors Anthony Mackie and Sebastian Stan. Given that Marvel has a history of hiring actors who are similar to their characters, it made MCU fans want to see more of Sam and Bucky interact. More started to ship the two after Civil War, given their more shared screen time. With the announcement of the Winter Soldier and Falcon series fans of the pairing were excited. The end of Endgame also set up the two for the series, but also caused many to ship them.

Most ship them based on their more snarky back and forths, specifically saying that they have a more buddy cop dynamic. Many joke about how the only reason they spend time together is because they're both best friends with Steve, and when he's not around they'll instantly start fighting.

After Endgame, the increase in fans of the pairing were due to the end result of the movie. The two were left alone without Steve, and would often use that as a point in current fics of pairing them together.

On AO3, there are over 1800 works, and is the second most written ship for Sam. On Wattpad, there are only 66 stories with the Winterfalcon tag.

Fandom
FAN FICTION 
 * Bucky/Sam (Avengers Film) on FanFiction.net
 * Bucky/Sam (Captain America Trilogy) on FanFiction.net
 * Bucky/Sam (Captain America Trilogy) on FanFiction.net

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TWITTER

WIKIS

Trivia

 * On Earth-616 both have taken on the mantle of Captain America.
 * In a promo for Avengers: Infinity War, Thor is looking through the figurines for the big battle and knocking them all down. When he gets to Sam and Bucky he says "I like those guys, they can stay".
 * A Winter Soldier and Falcon series was announced to be in the works, and would stream on Disney+.
 * An article on The Mary Sue site was written on why Bucky and Sam should be a couple in the Winter Soldier and Falcon series.

Variations

 * Samstevebucky refers to the ship between Sam, Steve Rogers, and Bucky.
 * Stackie refers to the ship between their actors, Sebastian Stan and Anthony Mackie