The Gunners were crowned champions on Tuesday night when defending champions Manchester City were held to a 1-1 draw away to Bournemouth, leaving Mikel Arteta's side with an unassailable four-point lead heading into Sunday's final round of fixtures.
Arsenal's squad had gathered at London Colney to watch City's match together and the final whistle sparked scenes of jubilation that continued long into the night, both at the training ground and outside the Emirates Stadium, where thousands of supporters celebrated with fireworks, flares and chants.
For many within the club, the triumph carried extra significance after Arsenal had finished runners-up in each of the previous three seasons and repeatedly faced accusations of "bottling" title races.
Saka and academy graduate Myles Lewis-Skelly were among those to hit back at critics during the celebrations.
In footage posted by Jurrien Timber on Instagram, Saka stood beside the blacked-out Premier League trophy Arteta had installed at the training ground earlier in the season, designed to light up only if Arsenal became champions.
"Light that up," Saka said. "Twenty-two years there was laughing, there was joking - they're not laughing anymore. Look, it is going to be shining."
Lewis-Skelly delivered another pointed response while holding a champagne bottle in a video shared on Saka's social media account.
"They called us bottlers," the midfielder said. "And now we're holding the bottle."
The references were a nod to the criticism Arsenal received after a 2-1 defeat at Man City in April appeared to leave their title challenge hanging in the balance. Instead, Arteta's side responded emphatically, winning their next four league games without conceding a goal while City dropped points against Everton and Bournemouth.
Declan Rice also revisited a moment from earlier in the season when television cameras caught him telling team-mates "it's not done" after defeat to City. Posting on Instagram after Tuesday's celebrations, the England midfielder wrote: "I told you all… it's done."
Celebrations spilled into the early hours of Wednesday morning, with Rice, Saka, Timber and Crystal Palace winger Eberechi Eze seen outside the Emirates Stadium at around 5am taking photographs with fans.
Eze also posted a picture of Arsenal captain Martin Odegaard drinking from an Arsenal-branded water bottle - another apparent reference to rival supporters mocking Arsenal's previous failed title bids.
The celebrations extended far beyond north London, with famous Arsenal supporters and former players flooding social media with tributes.
Prime Minister Sir Keir Starmer wrote on X: "22 long years for the Arsenal. But finally, we're back where we belong. Champions!"
Former manager Arsene Wenger, who guided Arsenal to three Premier League titles including the unbeaten "Invincibles" campaign of 2003-04, congratulated the current side in a video released by the club.
"You did it," Wenger said. "Champions go on when others stop. This is your time. Now, go on and enjoy every moment."
Former players including David Seaman, Martin Keown and Theo Walcott also hailed Arteta's achievement, while celebrities such as Piers Morgan, Anne Hathaway, Lewis Hamilton and Mo Farah joined supporters in celebrating the club's first league crown since 2004.
Arsenal will lift the Premier League trophy after Sunday's final-day trip to Crystal Palace, but their season could yet become even more memorable.
Arteta's side now turn their attention to the Champions League final against Paris Saint-Germain in Budapest on May 30 as they chase a historic double.
