Search and compare the best real-time prices for your round-trip, one-way, or last-minute flight to Mexico. Find cheap flights to Mexico from $134. 25% of our users found round-trip tickets to Mexico for the following prices or less: From Los Angeles $253, from Chicago $277, from San Diego $314 Book at least 3 weeks before departure in order to get a below-average price. After cheap flights to Mexico, you will be ready to start your Mexican excursion. From the bustling El Malecon boardwalk of Puerto Vallarta to the Mayan ruins of Cancun's Tulum National Park, there's something for everyone to explore when they visit Mexico with Southwest Airlines ®.Explore what's left of ancient pre-Hispanic civilizations, acquaint yourself with the country's diverse flora and fauna, or take in the rich culture of the many modern metropolises. Mexico flights can easily be found to any of these excellent airports. Visit Mexico. Looking for cheap airfare to Mexico? The busiest airports in Mexico include the Mexico City International Airport, the Cancun International Airport, and the Guadalajara International Airport. Top tips for finding cheap flights to Mexico.