Welcome To New York is about the planned and unplanned goof-ups in a Bollywood awards show. The IIFA awards night is scheduled to take place this year in New York. The show organiser, Gary’s (Boman Irani), assistant, Sophie (Lara Dutta), comes up with an idea to lure sponsors: IIFA would run a talent hunt contest in India, and the two most talented winners would get a chance to showcase their talent in front of Bollywood stars, filmmakers and producers at the IIFA night in New York. In this way, the sponsors would get great mileage in India as well as New York. The sponsors like the idea and immediately come on board, prompting Sophie to seek a pay hike. But when Gary refuses, Sophie swears revenge by spoiling the show. To begin with, she selects the two least talented contestants so that it would reflect badly on the IIFA show. The contestants selected are Teji (Diljit Dosanjh), an aspiring actor, and Jeenal (Sonakshi Sinha), an upcoming costume designer.
Along with the Bollywood celebrities, Teji and Jeenal reach New York a couple of days before the awards night. The show hosts are filmmaker Karan Johar (Karan Johar himself) and actor Ritesh Deshmukh (Ritesh Deshmukh himself). As the awards night approaches, Sophie realises to her horror that Jeenal is making her mark and may not end up embarrassing the organiser. She now cooks up another plan to ruin the IIFA show – by getting host Karan Johar kidnapped.
There is a villain in New York, Arjun (Karan Johan again) who resembles Karan Johar. He hates host Karan because he spreads the message of love through his films. He has his men kidnap host Karan Johar before the event. What happens then? Do Teji and Jeenal present their talent at IIFA? Are they both an embarrassment to the show and the organiser? Is Karan Johar able to host the show with Ritesh Deshmukh? What happens to Arjun? Is the show a success or a failure?