A 17th place finish the following season was followed by 20th place in 2015/16, and after missing out on promotion previous year in the play-offs having ended in sixth, Slavisa Jokanovic's side finished the recently completed season in third before overcoming Derby County and now Steve Bruce's Villa.
And now, Sessegnon will be playing Premier League football come August, with Fulham fans undoubtedly hoping it will be with them.
Tom Cairney's 23rd-minute goal ultimately proved enough to steer Fulham to the Premier League as Villa, who were much improved in the second half, were unable to find a leveller.
In a clear message to Fulham owner Shahid Khan, Jokanovic called for a spending spree as the west London club celebrate the estimated £160 million windfall from increased revenues on offer in the Premier League. We got a lot of stick.
"It's probably the best football of my career", Mitrovic said before leaving Wembley.
With the stakes so high, it was no surprise that the match was a frenetic affair in the opening stages.
Deloitte's Sports Business Group estimated Tuesday that Fulham would reap a revenue increase of more than $225 million upon promotion, a figure that would increase even more if the team avoids relegation next season.
Grealish felt he should have had a penalty with three minutes of the five added on to go but Anthony Taylor was right to wave it away.
In the second-half, Grealish was himself lucky not to see red after a wild lunging challenge on Cairney.
And the Cottagers managed to hold on despite pressure from Villa and being reduced to 10 men after Denis Odoi was sent off for two yellow cards. "We were unlucky and needed too many chances".