Olivarry

Flarrow is the slash ship between Barry Allen and Oliver Queen from the Arrowverse fandom.

2013
Barry and Oliver meet in autumn 2013 when Barry visits Starling City to follow up on an unusual occurrence. Barry instantly connects with Felicity, prompting Oliver's jealousy and repeated attempts at undermining Barry. Add to that Oliver's hesitancy to trust and he lashes out when Barry helps save Oliver's life. Oliver discovers that Barry isn't actually in Starling City on assignment, but has a softer disposition after Barry tells them the story of his mother. In spite of Oliver's jealousy of Barry and Felicity's blossoming romance, the two part on good terms.

2014
After waking from the coma, falling out with his family and overwhelmed by receiving his powers, Barry runs to Starling City to see Oliver and Oliver imparts his trust in Barry's ability to be a more noble hero than Oliver thinks he himself could ever be, which helps Barry feel like he can make The Flash work.

Fanon
On AO3 it is the third most written ship for Barry, and the second most written for Oliver. It's the third most written ship in The Flash tag, and the second most written relationship in the Arrow tag.

Fandom
AO3

FORUMS
 * Flarrow

TUMBLR

Trivia

 * Their ship name comes from the first two letters of Barry's codename, "The Flash", and the second half of Oliver's current codename, "Green Arrow".
 * During the two years when Arrow and The Flash were the only shows in the Arrowverse, the nickname for crossover episodes were called Flarrow. When a crossover would happens tumblr users tag their posts about the ship as Olivarry, instead of Flarrow, in order to distinguish between the two.