Capitalizing on the popularity of women's basketball in the state, as a result of the success of the UConn Huskies, the Sun held the distinction of being the only WNBA franchise not to share its market with an NBA team,[4] until the relocation of the Seattle SuperSonics in 2008 left the Storm as an independent team in Seattle.

Since Magic ownership was no longer interested in retaining the rights to the Miracle and no local partnership was reached, the organization ceased operations and was purchased by the Mohegan Tribe.

[5] The Sun's nickname, color scheme and logo are similar to that of another defunct Florida-based franchise, the Miami Sol, which folded at the same time as the Miracle's relocation to Connecticut.

[6] With a new home in Uncasville and two former UConn Huskies on the roster, the Sun entered the 2003 season looking to build upon a 2002 campaign in which they missed the playoffs due to a tiebreaker with Indiana.

The Sun underwent a total overhaul during the off-season – selecting Debbie Black in the dispersal draft and acquiring former Connecticut star Rebecca Lobo to add another local attraction to join Nykesha Sales.

The Sun returned Katie Douglas, Nykesha Sales and Taj McWilliams-Franklin, the group that formed Thibault's nucleus.

General manager Chris Sienko fortified that core with former UConn product Asjha Jones, who was acquired in a three-team trade, and Minnesota Golden Gophers phenom Lindsay Whalen, who was taken with the fourth overall pick in the 2004 Draft.

The Sun managed to snag a top pick in one of the deepest draft classes in league history by trading perennial all-star point guard Shannon Johnson.

In the 2005 WNBA Finals, the Sun were matched up against an equally dominant Sacramento Monarchs team while having to deal with injuries to Lindsay Whalen.

[22] During the 2007–08 offseason, the Connecticut Sun made major changes to their roster in an effort to win that ever-elusive championship title.

[24] Following the monumental trade, Nykesha Sales announced she would sit out the 2008 season due to multiple nagging injuries.

Connecticut started its rebuilding process by acquiring DeMya Walker in the dispersal draft of the Sacramento Monarchs, which was held on December 14, 2009.

Thibault continued to reshape his roster after introducing Kara Lawson at a press conference as a new member of the Sun.

[30] Lawson, along with Montgomery was meant to shape a formidable backcourt, which would go with their plans in signing reserves Anete Jēkabsone-Žogota and Tan White.

With its first overall selection in franchise history, the Sun took UConn standout and Player of the Year recipient, Tina Charles, the consensus top prospect available.

To diminish the losses of Amber Holt and Chante Black, both of whom were part of the package deal with the Shock, the Sun selected Kansas product Danielle McCray.

Prior to the draft, it was understood that McCray wouldn't be available to participate in the upcoming season due to an ACL injury she sustained in college.

Sandrine Gruda and Anete Jēkabsone-Žogota decided to sit out the season, so the Sun looked elsewhere, adding Jessica Moore.

[33][34] The Sun fended off the Liberty in two close semifinal games to face the Indiana Fever in what was the team's first Conference finals since 2010.

However, the Fever struck back with a close victory in Game 2 that saw Shavonte Zellous hit a two-point jump shot with 0.5 seconds remaining to provide the winning points in a 78–76 loss.

[35] Back in Connecticut, the Fever got onto a hot start and the Sun (who missed their first thirteen shots from the 3-point line) never recovered.

[37][38] With an eye to accomplishing the objective of a WNBA title, the team hired Hall of Famer Anne Donovan as Thibault's successor.

[39][40] Among other WNBA stints, Donovan was the head coach of the 2004 Seattle Storm team that captured the league title over Connecticut.

Donovan hired Catherine Proto and Jennifer Gillom as her assistant coaches for her initial season.

In 2014, Proto became Scouting and Video Operations Manager for the Sun and Steven Key replaced her as an assistant coach.

In the best-of-five round, they won in a three-game sweep over the Los Angeles Sparks to meet the Washington Mystics, now coached by former Sun Mike Thibault.

A sixteen-point halftime lead for the Sun in Game 4 proved important when the attempted comeback of the Mystics came short in a 90–86 decision.

However, the COVID-19 pandemic forced the WNBA to announce a change to the plan that would instead see 22 games played without fans at IMG Academy in Florida.

Broadcasters for the Sun games on WCTX consisted of Bob Heussler and Rebecca Lobo, Jennifer Rizzotti or Kara Wolters.

For the 2011 season, Sun games were broadcast on Comcast Sports Net New England, with Mike Gorman as an announcer.