Hurricane Helene is anticipated to reach the U.S. as a Category 3 storm on Thursday, already causing travel disruptions.

According to the National Hurricane Center, “Hurricane and tropical storm conditions are anticipated over the northeastern areas of the Yucatan Peninsula in Mexico today, and Tropical Storm and Hurricane Warnings are in effect.”

Travelers going to or returning from Mexico might experience changes in their travel schedules. While U.S. flights have not yet been notably affected, 12% of flights to Cancun have been canceled, and around 14% have faced delays, as reported by online flight tracker FlightAware. For flights originating at Cancun, 16% have been canceled, with 19% delayed.

Airlines are starting to offer waivers, and cruise companies are altering their routes.

Which Airlines Have Made Changes for Mexico Travel?

• Alaska Airlines: Passengers with flights to and from Cancun (CUN) between Sept. 25 and Sept. 27 can rebook or cancel without fees. Changes or cancellations must be made before the departure time, and new travel must be completed by Sept. 30. Canceled flights will receive credit for future use.
• American Airlines: Customers with flights to, through, or from Cancun (CUN) and Cozumel (CZM) until Sept. 27 may change their flights without incurring fees. Rebooking must be done by Sept. 27 and completed by Oct. 4, maintaining the same fare class and cities to avoid extra charges.
• Delta Air Lines: Delta passengers with flights to, through, or from Cancun (CUN) from Sept. 25 to Sept. 27 may rebook without fees if tickets are updated by Oct. 4 and completed by that date in the same fare class. If unable to fly by Oct. 4, fare differences may apply, but change fees will be waived. Cancellations will earn flight credit valid for one year from the original ticket date.
• Frontier Airlines: Travelers with Frontier flights to, from, or through Cancun (CUN) until Sept. 25 can change their bookings without fees; however, fare differences may still apply. Canceled flights will receive travel credit, minus any applicable cancellation or carrier fees.
• Southwest Airlines: Southwest passengers with flights to, from, or through Cancun (CUN) until Sept. 25 can reschedule their travel or fly standby at no additional cost within 14 days of their original dates. Travel must originate from the same cities to avoid extra fees. Those opting not to travel can ask for a refund for the unused part of their ticket or keep the credit for future flights.
• Spirit Airlines: Flyers with Spirit flights to, from, or through Cancun (CUN) until Sept. 25 can rebook without penalties if they reschedule for flights by Oct. 2. Fare differences will apply for travel beyond Oct. 2.
• United Airlines: Travelers with United flights to, from, or through Cancun (CUN), Cozumel (CZM), and Tulum (TQO) before Sept. 27 can rebook at no charge. United will waive any change fees and fare differences if travel is completed by Oct. 4, remaining within the same fare class and route as originally booked.

Which Mexico Cruises Are Affected?

Carnival Cruise Line’s ship, Carnival Paradise, which departed from Tampa, Florida, on Saturday, changed its intended stop in Cozumel on Tuesday to Costa Maya. Similarly, Carnival Valor canceled its scheduled visit to Cozumel on Tuesday, after setting sail from New Orleans, Louisiana, on Saturday.

Carnival Horizon, having left Miami on Sunday, has replaced its Wednesday stop in Grand Cayman with a visit to Amber Cove in the Dominican Republic instead of Cozumel.

Additionally, five itineraries from Royal Caribbean International have been affected thus far, as reported by the cruise line’s parent company, Royal Caribbean Group:

• Independence of the Seas, departing from Miami on Saturday, exchanged its Tuesday stop in Cozumel for Nassau in the Bahamas.
• Mariner of the Seas, also departing Saturday from Galveston, Texas, skipped its planned visit to Cozumel on Tuesday and instead had a day at sea.
• Serenade of the Seas, which left Tampa on Sunday, replaced its stops in Cozumel and Costa Maya for visits to Freeport and Nassau.
• Wonder of the Seas is dropping several scheduled stops, including Cozumel, Roatan in Honduras, and Costa Maya. After leaving Florida’s Port Canaveral on Sunday, the ship will now visit St. Thomas and St. Maarten.
• Grandeur of the Seas will visit Nassau and Freeport instead of its originally scheduled stops in Costa Maya and Cozumel on Wednesday and Thursday. This cruise departed from Tampa on Monday.