Las Vegas is 7 times larger than Tel Aviv.
Area: 363 km2 calculated
Las Vegas, officially the City of Las Vegas and often known as simply Vegas, is the most populous city in the state of Nevada and the county seat of Clark County. Wikipedia
Area: 52 km2 calculated
Tel Aviv is the second most populous city in Israel, and makes up the largest part of the city municipality of Tel Aviv-Yafo, which has a population of 414,600. Wikipedia