Flash and Supergirl Crossovers
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Meet the Seeker by moonswirl reviews
Prelude #1 to ONCE MORE UNTO THE BREACH, coming in July. (See author's note inside) An AU story set across the Arrowverse. In this installment: Discover the origins of the one known as Seeker... once upon a time known as Lena Luthor.
Rated: K+ - English - Sci-Fi - Chapters: 1 - Words: 3,376 - Reviews: 2 - Favs: 3 - Follows: 5 - Published: 3/10/2018 - Lena L. - Complete
Jesse Frost Snow by DisneyBrony96 reviews
A lesbian love story between a speedster and a frosty scientist
Rated: K+ - English - Romance/Drama - Chapters: 1 - Words: 388 - Reviews: 2 - Favs: 6 - Follows: 2 - Published: 3/10/2018 - Iris W., Dr. Caitlin S., Jesse Q., Kara D./Supergirl - Complete
Lightning Strikes by Hrabdos reviews
Barry and Cisco are college roommates who secretly operate Team Flash. The two go to a party and Barry meets an interesting young woman named Kara. Please let me know what you think!
Rated: T - English - Romance/Friendship - Chapters: 3 - Words: 6,050 - Reviews: 19 - Favs: 43 - Follows: 73 - Updated: 3/8/2018 - Published: 5/17/2017 - Barry A./The Flash, Kara D./Supergirl
Meanwhile On Earth-1 by LiseBardKimley reviews
Independent one-shots stemming from a bunch of ideas that came from reading this article: /dc/amp/2018/01/14/arrowverse-supergirl-earth-1-crisis-on-earth-x-power-girl/
Rated: K - English - Chapters: 7 - Words: 8,529 - Reviews: 8 - Favs: 13 - Follows: 15 - Updated: 3/8/2018 - Published: 1/18/2018
We are one by KryptonianPotato reviews
Barry's life has become a quite depressing since Savitar. Iris broke up with him, his friends aren't themselves, and his relationship with joe has been going down hill. He goes to seek comfort in his super friend on earth 38. Maybe one day, they might be more than just friends.
Rated: T - English - Romance/Adventure - Chapters: 13 - Words: 12,228 - Reviews: 119 - Favs: 135 - Follows: 141 - Updated: 3/8/2018 - Published: 11/20/2017 - Barry A./The Flash, Kara D./Supergirl
Chasing Pavements by Artemis08Luna reviews
Kara sings for Barry and Oliver. OR: Barry's blind, Kara's deaf and Oliver's mute, but that doesn't stop them from being together. (KARIVARRY)
Rated: K+ - English - Romance - Chapters: 1 - Words: 771 - Reviews: 5 - Favs: 24 - Follows: 13 - Published: 3/6/2018 - [Barry A./The Flash, Oliver Q./The Arrow, Kara D./Supergirl] - Complete
Alone and Together by hanger reviews
Kara was surrounded by people, but none could help her. Mon-el was gone. She knew it had been two years, but she couldn't stop thinking of him. At least, not until a man named the Flash showed up. Barry Allen was taking care of the ones he loved, but he was alone. He didn't even enjoy running anymore. That is until he met a girl named Kara Danvers.
Rated: T - English - Romance/Hurt/Comfort - Chapters: 2 - Words: 2,181 - Reviews: 8 - Favs: 35 - Follows: 47 - Updated: 3/2/2018 - Published: 3/1/2018 - Barry A./The Flash, Kara D./Supergirl
Nextwave by KingDazed reviews
Monica Rambeau, an ex-leader of The Avenger, abruptly left Earth-616 to find her home a parallel Earth. Wally West mentors under Monica to become the fastest man alive forming the Nextwave . On arrival of Earth-38 past relationship with Lena Luthor comes to light as the arrival of the new heroes in National City struck news throughout the city. [Mature Themes]
Rated: M - English - Romance/Angst - Chapters: 11 - Words: 39,162 - Reviews: 1 - Favs: 6 - Follows: 3 - Updated: 3/1/2018 - Published: 11/28/2017 - Wally W., Kara D./Supergirl, Alex D., Lena L.
Ellie and the Music Meister by serenitykid1378 reviews
Lena finds a baby outside her apartment. The Music Meister attacks. J'onn, Alex, Lena, and the baby head to get team Flash's help. Set during Star-Crossed ending on Supergirl and the Duet episode of the Flash. No Mon-El. Supercorp. Snowbarry. A little AU.
Rated: K - English - Hurt/Comfort/Romance - Chapters: 1 - Words: 6,168 - Reviews: 2 - Favs: 41 - Follows: 24 - Published: 2/25/2018 - Barry A./The Flash, Dr. Caitlin S., Kara D./Supergirl, Lena L. - Complete
Destiny by Dewy908 reviews
The heroes are beaten, and they have lost almost everything. Humanity is very existence is being threatened. The heroes powers are weakened and they face an enemy they have no hope of beating. What ill happen when the last bit of light in this solar system is being threatened? Will the heroes stand and fight, or will they buckle under the pressure.
Rated: T - English - Adventure/Romance - Chapters: 4 - Words: 4,789 - Reviews: 10 - Favs: 15 - Follows: 13 - Updated: 2/24/2018 - Published: 12/28/2017 - [Barry A./The Flash, Kara D./Supergirl] Oliver Q./The Arrow, Alex D.
We Decide our Future by Dewy908 reviews
During the 'World's Finest' episode on Supergirl, Barry was there for weeks. He developed feelings for the alien in blue and Kara developed feelings for the meta-human in red. So how will they maintain an inter-dimensional relation ship?
Rated: T - English - Romance/Adventure - Chapters: 9 - Words: 12,821 - Reviews: 35 - Favs: 115 - Follows: 124 - Updated: 2/24/2018 - Published: 2/7/2018 - [Barry A./The Flash, Kara D./Supergirl]
The Other Side by PolarTempest reviews
This is a slightly AU story that starts at the end of the Supergirl/Flash crossover episode. My own personal take on how things could have gone.
Rated: T - English - Romance/Family - Chapters: 12 - Words: 13,584 - Reviews: 24 - Favs: 59 - Follows: 82 - Updated: 2/23/2018 - Published: 12/7/2016 - Barry A./The Flash, Kara D./Supergirl
Donuts - A Karry Oneshot by KarryLover2004 reviews
Donuts, and races. No Spoilers, read it yourself. First chapter is glitched, real story is in chapter 2.
Rated: K+ - English - Humor - Chapters: 2 - Words: 608 - Reviews: 6 - Favs: 4 - Follows: 3 - Updated: 2/22/2018 - Published: 2/15/2018 - [Barry A./The Flash, Kara D./Supergirl] Cisco R., Wally W. - Complete
The Beginning Of The Super Friends by DisneyBrony96 reviews
Barry Allen travels to earth 38 which is Supergirl's earth and stays for awhile, but somethings happen during his visit.
Rated: T - English - Suspense/Sci-Fi - Chapters: 2 - Words: 2,022 - Reviews: 2 - Favs: 8 - Follows: 5 - Updated: 2/15/2018 - Published: 2/13/2018 - Barry A./The Flash, Kara D./Supergirl, Alex D., Lena L. - Complete
Crisis on Earth-X by Afaim reviews
Crossoverfic aus meinem A/B/O-Arrowverse. Es ist die Hochzeit des Jahres! Gäste aus vier verschiedenen Welten sind zur Hochzeit von Barry Allen und Iris West eingeladen worden, doch was wenn uneingeladene Gäste aus einer fünften Welt auftauchen? Einer Welt, die so furchtbar ist, dass die anderen Welten ihr eine Nummer verweigern und sie nur als Erde-X bezeichnen...
Rated: T - German - Drama/Angst - Chapters: 22 - Words: 70,769 - Reviews: 2 - Follows: 2 - Updated: 2/15/2018 - Published: 1/8/2018 - Barry A./The Flash, Iris W., Kara D./Supergirl, Alex D. - Complete
Midvale by Stannis is the one true king reviews
What if Barry, Kara and a few others attended high school together? Welcome to Midvale, where heroes are everywhere. R&R! Yes, this is MAJOR AU, Barry is a Wells, not an Allen, and they're all on the same Earth, let's call it Earth-4.
Rated: T - English - Chapters: 3 - Words: 2,495 - Reviews: 10 - Favs: 31 - Follows: 36 - Updated: 2/14/2018 - Published: 3/3/2017 - Barry A./The Flash, Kara D./Supergirl, Maxwell L.
Our Girl by Artemis08Luna reviews
Barry says "our girl" to three different sets of people on three separate occasions, referencing three different women. (KARIVARRY)
Rated: K+ - English - Humor/Family - Chapters: 1 - Words: 2,425 - Reviews: 1 - Favs: 37 - Follows: 18 - Published: 2/11/2018 - [Barry A./The Flash, Oliver Q./The Arrow, Kara D./Supergirl] - Complete
A whole new world (literally) by KryptonianPotato reviews
After the events of world's finest, Kara tries, to visit Barry on earth one. But she messes up the vibrations and goes to the wrong earth. Cisco vibes it and tells Barry. He goes to save her and they get stuck. Neither Cisco nor Barry can open a breach to get home, and it turns out to be the work of a familiar foe.
Rated: T - English - Adventure/Romance - Chapters: 2 - Words: 2,001 - Reviews: 9 - Favs: 22 - Follows: 31 - Updated: 1/29/2018 - Published: 1/24/2018
SuperFlash by call-me-ocean reviews
this takes place in season 1 of Supergirl and season 2 of the Flash. Basically, we will start this story with Kara and Barry in their respective episodes then I will start a rewrite. And from there we will have a story! Sorry for typos, takes place in World's Finest. T just to be safe
Rated: T - English - Romance/Adventure - Chapters: 2 - Words: 2,063 - Reviews: 7 - Favs: 13 - Follows: 14 - Published: 1/28/2018 - Barry A./The Flash, Kara D./Supergirl
The Way They Work by Artemis08Luna reviews
Ralph Dibny doesn't really get the three heroes standing in front of him. They're having another one of their infamous screaming matches after failing to stop a heist. He can't take it anymore, he just has to ask, "If they hate each other so much, why are they still together?" (KARIVARRY)
Rated: K+ - English - Humor/Romance - Chapters: 1 - Words: 978 - Reviews: 2 - Favs: 52 - Follows: 22 - Published: 1/28/2018 - [Barry A./The Flash, Oliver Q./The Arrow, Kara D./Supergirl] - Complete
Not As Similar As Them by QueenArrowLove13 reviews
Barry and Kara from Earth 17 accidentally transferes to Earth 1 and The Flash, Green Arrow and Supergirl helps them go back to their universe.
Rated: K - English - Drama/Fantasy - Chapters: 1 - Words: 68 - Reviews: 3 - Favs: 5 - Follows: 3 - Published: 1/23/2018 - Barry A./The Flash, Kara D./Supergirl
Karry by orangejulius01 reviews
My attempt at a Karry pairing, Flash has escaped the speedforce but after being cheated on and undervalued runs to the only earth he thinks he can hide on. Meanwhile Kara has been left heartbroken by James and still hasn't stopped myriad,which will happen later. will contain lemons and fighting. Takes place after Flash and supergirl fight liverwire, winn still at DEO heavy OCevents
Rated: M - English - Romance/Adventure - Chapters: 3 - Words: 5,401 - Reviews: 32 - Favs: 131 - Follows: 143 - Updated: 1/23/2018 - Published: 1/21/2018 - [Barry A./The Flash, Kara D./Supergirl]
The Adventures of Harry and Cisco by geeorgiaaaaaaa reviews
Harry and Cisco are brothers. They end up going to a Superhero High School, and meet some amazing new Superheroes in training, such as Barry Allen, Kara Danvers, Mike Matthews, and even Oliver Queen. When Cisco gets his powers, and Harry doesn't, when he finally gets them, will he become a Superhero, or a Supervillain?
Rated: K - English - Mystery/Romance - Chapters: 1 - Words: 830 - Reviews: 1 - Follows: 1 - Updated: 1/16/2018 - Published: 1/11/2018 - Cisco R., Harrison Wells, Barry A./The Flash, Kara D./Supergirl
Crisis On Earth 38 by dirgeceberus93 reviews
Kara and her team have been betrayed. Kara was injured but her team turns to the only friends Kara trust which is the Flash, Supergirl and her team arrive unexpectedly at Earth 1 to seek help. A new alliance are created to help Supergirl retain her citizen back.
Rated: M - English - Chapters: 12 - Words: 27,329 - Reviews: 8 - Favs: 34 - Follows: 25 - Updated: 1/10/2018 - Published: 8/31/2017 - Barry A./The Flash, Iris W., Kara D./Supergirl, Mon-El - Complete
Super Family by Ember411 reviews
Is it easier or harder to raise children like a normal family with superpowers? Kara Danvers and Barry Allen are soon going to discover if their theory is correct or incorrect. Rated T for minor violence
Rated: T - English - Family/Friendship - Chapters: 66 - Words: 75,094 - Reviews: 222 - Favs: 201 - Follows: 191 - Updated: 1/8/2018 - Published: 9/2/2016 - Barry A./The Flash, Kara D./Supergirl - Complete
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