Like how the old saying goes, the lesser we get, the better!
The Australian cinema chain Event Cinemas recently updated a listing on their website for Spider-Man: Homecoming and, according to the listing, the movie is going to be 130 minutes long. That puts it just a little over two hours, which is perhaps a tiny bit long, but also not at all unusual for a big superhero movie of this nature. That also makes it more than twenty minutes shorter than *cough* The Amazing Sh*t-Man 2 *cough*, for whatever that may be worth.
To put it in context with other Marvel films, that puts it in a tie with Iron Man 3 for the fifth longest movie in the franchise. The longest film in the MCU to date is Captain America: Civil War, which served as Tom Holland’s debut as the new Peter Parker, which clocks in at 147 minutes. That is followed by both of Joss Whedon’s MCU entries, with The Avengers coming in at 143 minutes and Avengers: Age of Ultron at 141 minutes. Thor: The Dark World and The Incredible Hulk both come in at 112 minutes in length, tied for the shortest in the MCU. So, Spider-Man: Homecoming looks to be right up the middle in that respect.
Source: Spider-Man: Homecoming Runtime Revealed and It Sounds Perfect