In a clash between DC and Marvel heroes, Flash easily overcame Hawkeye due to his expertise in battling Captain Boomerang and his close relationship with Green Arrow, providing him with a deep understanding of archers' tactics. The JLA/Avengers crossover event brought together Marvel and DC Universes through a mysterious force, resulting in a face-off between the two legendary superhero teams. Flash's speed and familiarity with similar weaponry gave him the upper hand against Hawkeye and his specialized arrows in their street-level encounter. See the image below for a visual depiction of the event.
During the JLA/Avengers crossover, DC's Flash pointed out that one of Marvel's Earth's Mightiest Heroes, Hawkeye, shared a striking resemblance to his arch-nemesis Captain Boomerang. Flash's previous encounters with Captain Boomerang equipped him with the skills to effortlessly dodge Hawkeye's trick arrows and defeat him in battle. JLA/Avengers #2, written by Kurt Busiek, illustrated by George Perez, colored by Tom Smith, and lettered by Comicraft, depicted the merging of the Marvel and DC Universes, causing characters to cross over to different universes. This led to an epic clash between the Justice League and the Avengers. In the midst of this crossover event, Flash and Hawkeye found themselves in a showdown on the streets. Despite Hawkeye's impressive array of trick arrows, they proved powerless against Flash's super speed and his familiarity with similar weapons used by Captain Boomerang and others. Superman, a member of the Justice League, has never held the Avengers in high regard, despite their claim to be Earth's Mightiest Heroes. Flash's extensive encounters with the trickster Captain Boomerang have honed his abilities to effectively evade attacks from individuals throwing objects at him. This valuable experience allowed him to effortlessly handle Hawkeye's arsenal of trick arrows.Hawkeye is a well-established member of the Avengers and is widely regarded as one of the greatest archers in the Marvel Universe. He once displayed incredible marksmanship by killing someone with a flick of a fingernail. Over the years, he has honed his skills with trick arrows that produce various effects. Despite his exceptional abilities, Hawkeye was outmaneuvered by Flash.
Flash has extensive experience with archers, both as allies and adversaries. He has faced off against Captain Boomerang and collaborated with Green Arrow, whose tactics are similar to Hawkeye's. Green Arrow is known for using unconventional trick arrows, a method that Flash is familiar with from his encounters with Justice League enemies. While Hawkeye has saved the world numerous times as an Avenger, he has not had much interaction with speedsters like Flash, who is considered faster than Marvel's speedsters. In contrast, Flash has frequently engaged with characters who rely on long-range tactics and gadgets, similar to Hawkeye. This experience became evident when the two heroes clashed, and Flash's familiarity with a classic Flash villain ultimately led to his victory over Hawkeye.