Mexico is the second largest U.S. inbound market (after Canada) and accounted for 23% of all international visitations in 2018. The U.S. welcomed 18.5 million overnight arrivals from Mexico in 2018, the vast majority (85%) of which crossed a land border, while a minority (15%) arrived by air (day trips are not included in the count). The U.S. accounted for 83% of all international overnight trips by Mexicans in 2018.