Flights from San Antonio (SAT) to Cancun (CUN)

San Antonio has nonstop flights to Cancun, and the trip takes about two and a half hours. As of recent schedules, Southwest Airlines flies SAT to CUN nonstop, and Sun Country Airlines adds seasonal nonstops, mostly in summer. Neither runs daily all year, so check with the airline for the days that operate on your dates.

Nonstop airlines and seasons

Southwest Airlines is the airline most travelers from San Antonio use for Cancun. Its frequency follows demand. In late winter and spring 2026 the route ran mainly on Saturdays. For summer 2026 Southwest scheduled flights on most days of the week. Future seasons may differ, so look at the schedule for your exact week before you set hotel dates.

Sun Country Airlines, the Minneapolis-based leisure carrier, sells SAT to Cancun as a seasonal route. Recent schedules showed it flying in the summer months on Boeing 737-800s, with frequency varying by week. It is worth checking for school-holiday trips. Outside those months, plan on Southwest or a connection.

Which terminal at San Antonio

SAT has two terminals, A and B. Southwest and the airport's international flights use Terminal A. That matters most on the way home: every international arrival clears US Customs in Terminal A, and the airport estimates 30 to 60 minutes for the process. Global Entry kiosks are in the customs hall. A third terminal, Terminal C, is under construction and is scheduled to open in 2028.

Connecting itineraries

A one-stop trip is useful when the nonstop is not flying, or when you are booking with miles on another airline:

• United connects through Houston Intercontinental, which has frequent Cancun flights. Our Houston to Cancun guide covers that hub.
• American connects through Dallas-Fort Worth.
• Southwest sells connections through Houston Hobby on days without a nonstop.
• Delta connects through Atlanta.
• Aeromexico flies San Antonio to Mexico City nonstop, with onward flights to Cancun. See the San Antonio to Mexico City guide.
• Viva Aerobus flies San Antonio to Monterrey, where you can connect to its Cancun flights.

Connections through Mexico City or Monterrey mean you clear Mexican immigration at the first airport in Mexico, not in Cancun. Leave at least two hours to change planes there, and keep everything on one ticket.

Flight time and clocks

The nonstop covers about 930 miles. Southbound flights are scheduled at roughly two and a half hours. The trip home often runs a little longer, up to about three hours. Cancun keeps Eastern Standard Time all year, while San Antonio is on Central time with daylight saving. In summer the two cities show the same time. Between November and March, Cancun is one hour ahead, so a winter flight seems to take an hour longer going down and an hour less coming back.

Landing at Cancun

As of recent airport listings, Southwest and Sun Country both use Terminal 4 at Cancun. Mexican immigration is the first stop. Then you collect your bags and go through customs. Past customs, ignore anyone offering a "free" ride in exchange for a timeshare presentation, and head outside to the transport area.

Ground transport from Terminal 4

ADO buses stop outside Terminal 4, as well as Terminals 2 and 3. Follow the ADO signs after you exit arrivals.

• Playa del Carmen: buses leave frequently through most of the day and take roughly an hour to an hour and a half to the Turistica station in central Playa.
• Tulum: direct ADO buses run only a handful of times a day, clustered around midday. Outside that window, ride to Playa and change, or book a shared shuttle.
• Downtown Cancun: ADO runs to its downtown terminal. Since late August 2026 it also runs a route linking several downtown Cancun hotels with the airport.
• Hotel Zone: most visitors use a pre-booked shuttle or an authorized airport taxi for the short drive. The low-cost option is ADO to downtown and the R-1 or R-2 local bus.

Buy ADO tickets at the booth or the platform seller after you land. Fares are posted in pesos, and drivers and sellers give change in pesos.

Passport, digital FMM and Visitax

US citizens flying to Mexico need a passport book; the passport card is for land and sea crossings only. No visa is needed for tourism. At Cancun the old paper FMM has been replaced. The officer records your entry and the days granted from your passport. If you use the self-service e-gates, scan the QR code on the slip to download your digital FMM and keep it until you leave Mexico. Airlines may refuse boarding if your passport expires soon, so read our passport validity guide.

Visitax is a separate state charge. Every foreign tourist staying in Quintana Roo, which includes Cancun, Playa del Carmen, Tulum and Cozumel, must pay it, with no exemption for children. The only official payment site is visitax.gob.mx, which lists the current amount. The receipt is a QR code, retrievable later with your passport number.

Bags on Southwest and Sun Country

The two nonstop airlines handle bags differently. Southwest includes a full-size carry-on on every fare, including Basic, but charges for checked bags except on Choice Extra or with qualifying status or its credit card. Sun Country's base fare includes only a personal item. A carry-on costs extra on the base fare and is cheapest when added at booking, and some Sun Country bundles include one. Read the bundle details before you pay. A family packing for a week at the beach should compare the total with bags, not the base fare. More in our guide to what basic fares leave out.

Weather, storms and when to book

Hurricane season in the Atlantic, which includes the Caribbean coast of Mexico, runs June 1 to November 30, and storms are most likely from mid-August to mid-October. Summer is still a busy time on this route because of school holidays, and that is when the nonstop schedule is fullest. Winter and spring are outside the season and are the most popular months on the Caribbean coast. If you travel in September or October, choose a fare you can change and check the National Hurricane Center before departure.

Fares on this page come from the live grid for the dates you enter. For more trips from home, browse all flights from San Antonio.