Sky Sports revealed on deadline day that the Swans had made an approach for the Belgian winger.
They believed there was a deal to be done as Chadli had struggled to settle at White Hart Lane following a summer switch from FC Twente, and had World Cup participation to think about.
The 24-year-old admits he considered taking in a spell elsewhere, following a frustrating time in north London, but ultimately decided to stay put and prove his worth to new boss Tim Sherwood.
Chadli said in the Daily Mirror: "It was a possibility, but it is in the past.
"I had to make a decision and my decision was to stay. Everything was not clear so I wanted to stay at Tottenham and play for my club. I have signed for five years and I'm happy.
"When I came to Spurs, I knew I wasn't going to play in every game as we have 60 matches in a season.
"I came and got injured, played, got injured again and so I haven't played as much as I have wanted, but we have a big squad with a lot of good players and we have to compete with each other. I have to work hard in training and show it when I play."
Chadli was among the goals on Wednesday as Tottenham hammered Newcastle United 4-0 at St James' Park.
That result has kept them just three points adrift of the UEFA Champions League places and seven off top spot.
On Spurs' ambitions, Chadli added: "We have to keep playing like we did at Newcastle and keep going in every game for 100 per cent to get the three points. With five games to go, we will see where we are.
"We are not looking to go above Chelsea. We are looking at Liverpool, who are directly above us and we have to go there in a few weeks, so that will be a big examination.
"We are within touching distance of the top. We have had a good week, but in one week everything can happen, everything can change.
"We can be up or we can be down, so we have to stay alert and play our game like we did at Newcastle, although I would say everything is possible this season.
"It is a very different league this season, because a lot of teams are taking points off each other and are playing at around the same level."