In Liverpool, an estimated one million people cheered on their team after they scooped a record-equalling 20th league title.
The team took part in a procession from the city's southern outskirts to the Strand as fans held up banners and flags, with some clinging on to lamposts while others lit flares as they welcomed their stars.
"The best city in the world. Just look at it," midfielder Curtis Jones said.
"It's my second one (Premier League trophy). But this one feels even more special. I've played more of a bigger role in this, so it's good to just enjoy it here with all the staff and the players and of course the fans as well.
"This is what it's all about."
Crystal Palace, meanwhile, celebrated winning a historic FA Cup in front of thousands of their supporters in south London.
It was the club's first major piece of silverware in their 164-year history and ensures they will compete in Europe for the first time next season.
Two open-top buses took the players and staff around the streets before ending up at the club's Selhurst Park stadium for a Party on the Pitch.
"The celebrations have been amazing, the fans deserve this," goalkeeper Dean Henderson said.
Striker Jean-Philippe Mateta, who was wearing novelty glasses, said: "When I win, I'm always happy, and it's great to bring the trophy here for the fans."
"I couldn't be more pleased to work with a group of players like they are, not just because of the talent, but especially what great characters they are," manager Oliver Glasner said.
Addressing the crowd, he said: "I couldn't be more pleased to manage a club like Crystal Palace, with fans like you.
"We had tough moments, but you always supported us. We are all one team. That's why we could win this trophy, why we could succeed," he added.
Earlier in the day, Arsenal's women held a trophy celebration outside the club's Emirates Stadium after their stunning Champions League win over Barcelona.
Speaking in front of an estimated 10,000 supporters, captain Kim Little said their 1-0 victory on Saturday was the "best moment" of her career.
"It felt like this was our year," she said. "It's truly special, winning the ultimate trophy."
Arsenal's Leah Williamson said her belief in "magic" had been justified.
"I said before, I've been educated my whole life and seen with my own two eyes how successful Arsenal have been, especially Arsenal Women, and all I ever wanted to do is be a part of it so it's very special," the England captain said.
"I've been saying the whole (season) and all of my teammates will tell you, all I kept saying was 'do you believe in magic', because that's what I could feel.
"I knew it was going to happen against Lyon (in the semi-final), I knew it was going to happen in the final, and magic delivered."
Stina Blackstenius scored the winner in the final, and though it was a confident strike, says she felt the nerves during the game.
"It’s just amazing standing here with this team and all of you," she said. "We won the Champions League and it just feels unbelievable in every way."
But while Liverpool, Palace and Arsenal celebrate, Manchester United have left the country.
Just 24 hours after beating Aston Villa on the final day of a miserable season, the squad flew to Malaysia to compete in two friendlies as part of a money-spinning end-of-season tour.
Their fans will hope for much more when the new season gets underway in August.