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How Fast is the Flash? Here’s the Comic Book Hero’s Top Speed

In all of comics, there are certain questions that will never have definite answerspartly because its more fun to speculate and partly because its just a smart business decision. Who would win in a fight? Whos the smartest person on the planet? Whos the strongest? And whos the fastest?

Theres no easy answer to any of these. There have been enough contradictions, crossovers, and comic book catastrophes to give a wide variety of characters a fighting chance in all of these discussions. As youll soon see, if you try to narrow the scope, there are still a ton of different factors to consider. But with that in mind, heres an in-depth look at how fast the Flash really is, and how he stacks up against other comic book speedsters.

Who is the Flash?

To start, there isnt just one Flash. As far as most fans are concerned, there are four primary characters who donned the scarlet and gold over the years: Jay Garrick, Barry Allen, Wally West, and Bart Allen. Have other people gone by the name of Flash? Yep. Some of which were even women. But these four did the most with the title for the longest time. Knowing the differences between these four will be very important going forward.

Jason Jay Garrick | the Originator

The first Flash debuted in 1940. Jay Garrick was a college student studying chemistry and physics in Keystone City when an experiment went wrong. While unconscious, Garrick got mixed up with some chemicalsagain, this is 1940and went into a coma. When he woke up, he had super speed.

You can always tell Jay apart from his successors because he has the most unique costume. Instead of the full-body spandex look, he wears a long-sleeve red shirt, outdated skinny jeans, and a metal helmet with Hermes-inspired wings on its sides.

Cover by Sheldon Moldoff

Flash Comics #1 (January 1940)

Bartholomew Barry Allen | the Poster Child

Barry Allen is the most widely known Flash of all. He debuted in 1956 and is the main character used in most on-screen depictions of the character. Justice League/Justice League Unlimited? Barry. The CW? Barry. The DC Extended Universe? Barry. If youre watching the Scarlet Speedster on TV somewhere, its safe to assume its Barry.

Barr got his powers after being struck by a bolt of lightning while working in his crime lab with the Central City Police Department. Again, chemicals got mixed in and when he woke up, he could move at blinding speeds. His look would inspire every Flash that followed in his wake. Barry was the main Flash for nearly 30 years until he sacrificed himself in 1985 during DCs Crisis On Infinite Earths event.

Cover by Carmine Infantino and Joe Kubert

Showcase #4 (October 1956)

Wallace Wally West | the Innovator

If youre under the age of 40, chances are Wally West is your favorite Flash. Even if you love Grant Gustin on the CWs Flash, its probably because hes named Barry Allen but has the personality of Wally West.

In most adaptations, Wally is the nephew of Iris West and her husband, Barry West. He got his superspeed powers after he visited his uncle at work one day andyou guessed it!he got struck by lightning while being surrounded by chemicals.

After learning the ropes, Wally took over the mantle of Flash. He enjoyed a solid 25-plus-year run, and he revolutionized what it means to be the Flash. For example, he was the first Flash to dive deep into the science and discover the Speed Force, a massive energy force that only a handful of people have been able to tap into.

Cover by Jackson Guice

Flash vol. 2, #1 (June 1987)

Bartholomew Bart Allen II | the Footnote

For a brief time period, Wally West was out of commission as the Flash. Fortunately, hed been training a sidekick named Bart Allen, who was Barrys grandson who traveled back in time from the future and donned the codename of Impulse.

Bart got his powers genetically and had the knowledge of future advancements to help him during his 13 issues as Flash. Sadly, hes mostly remembered as a placeholder in this regard and most fans think of him as a hyperactive teenage sidekick.

Cover by Mike Wieringo

Flash (vol. 2) #92 (July 1994)

How fast is the Flash?

This is where things get complicated. The short answer is this: The fastest Flash is whoever the hell DC is using to headline the series at the time. (Its probably Wally and definitely not Jay.)

Now, get ready for the long answer.

Its not as simple as determining which Flash is the fastest because they all get their powers from the same source. When it comes to how fast they each can run, the answer is simple: infinitely fast. With the right motivation and circumstances, they could each run at speeds that we cant even measure or comprehend. Its more about whos the most well-versed in their use of the Speed Force and can push their limits the most, which is why the fastest Flash is definitely Wally West.

Need further proof? Here are some of his most incredible accomplishments at the Flash:

1. Racing Black Flash (Death)

We all know the Flash eventually gets so fast that he can travel through time, multiple dimensions, read up on architecture and construct entire within minutes and even phase 747s through solid objects. While all of that is cool, it’s only the tip of the Flash iceberg.

Illustration via Final Crisis #2 by J. G. Jones

Barry Allen returns to the DC Universe, fleeing from the Black Racer.

One of Flashs most impressive stunts involved his race against the Black Flash, an embodiment of death. During their race, Wally West ran so fast that he jumped forward in time by millions of years until nothing existed, resulting in death no longer being a concept. As a result, the Black Flash was no more. The Flash literally outran death.

2. Saving half a million people in .00001 microseconds

In JLA #48, Jonn Jonnz had his body taken over by a supervillain and sent a nuclear warhead flying towards a city in North Korea with a population of over half a million people. To save all of those lives, Wally rushed to Chongjinpost-blastand carried over half a million people to safety 35 miles away. One at a time. Maybe in pairs. In .00001 microseconds.

The Flash ran back and forth across 35 miles at least 250,000 times in less than a second. Thats INCREDIBLE. Some even speculate that this would measure up to moving 13 million times the speed of light. But still not the ceiling for how fast he can go.

3. Running faster than instant teleportation

In issue #138, Wally gets recruited for a competition of speedsters from infinite dimensions held by some ultra-dimensional beings with some major gambling problems. The losers home worlds would be destroyed if they lost. Seeing this entire game as an unnecessary loss of life, the Flash upped the ante.

He bets the alien gamblers that he can beat them in a race back to Earth. Given that they can teleport, it looks like a guaranteed loss because, conceivably, nothing is faster than instant transmission. However, the Flash gets all 5 billion people on the planet to agree to run so that he can borrow their kinetic energy and beats the space overlords in record time.

Well give Barry Allen all of the credit he deserves for creating the Speed Force and running so fast that hes changed the entire fate of the world more than once. Maybe he wouldve accomplished the same feats as Wally if he wasnt dead for more than 20 years. But he didnt get that opportunity. So, Wally gets the win here.


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The science behind the Flash

Comic book writers have done a good job of staying away from specifics when it comes to measuring Flashs speed. When they do pinpoint it somehow, its some astronomically large number that we cant even begin to fathom. This point was made perfectly clear in this classic meme of Flash telling Superman exactly how fast he is.

Screengrab via DC Comics

Its been theorized that, in our reality, the Flashs speed would actually destroy the entire planet. Moving millions of times faster than the speed of light doesnt come without consequences. Some speculate that the kinetic energy created with that kind of movement creates more energy than a barrage of nuclear warheads and could rip reality to shreds, atom by atom.

Im not a physicist, and Im not the best with numbers (reason #45 why Im a writer), but if you want a serious breakdown into how fast the Flash can go, heres a great video to look at. It even breaks down E = MC^2 for those of us who fell asleep during that day of class.

Editor’s note: This article is regularly updated for relevance.

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