(CNN) — Passengers due to fly into the path of Tropical Storm Dorian may be able to reschedule their flights for free.

Several US airlines are offering travel waivers to customers with scheduled flights to the eastern Caribbean as the storm travels through the Caribbean Sea.

READ MORE: Safety Is Top Priority As Parents, Students Prepare For Upcoming School Year

The National Hurricane Center issued a tropical storm warning and a hurricane watch for Puerto Rico on Tuesday morning. It’s expected to strengthen into a Category 1 hurricane as it nears the territory around 2 a.m. ET on Thursday, CNN meteorologist Dave Hennen said.


Delta customers with flights scheduled until August 29 to parts of the Dominican Republic, Puerto Rico, Haiti and Saint Lucia can change out their flight, free of charge, before September 5. Passengers who cancel their trip can use the value toward a future flight, the airline said.


Customers flying Southwest to Turks and Caicos, the Dominican Republic and Puerto Rico between today and August 30 may rebook a flight. They must rebook within 14 days of their original travel date and can reschedule their travel plans online, too, if they booked on Southwest.com.


READ MORE: Donations Needed For Landfill Search To Find Zion Foster

American Airlines will waive the fee to change flights scheduled until August 29 if they’re canceled. Trips to Barbados, Haiti, Martinique, the Dominican Republic, Puerto Rico and Saint Lucia are subject to cancellation.


Spirit will waive the fee to change flights for passengers with flights between August 27 and 30 to Puerto Rico, Haiti or the Dominican Republic. Customers must rebook no later than September 5.


Frontier allows customers with flights booked to Puerto Rico and the Dominican Republic until August 30 to make one change to their itinerary free of charge.

MORE NEWS: Businesses Make Changes To Keep Customers Safe Amid Boil Water Advisory In SE Michigan

The-CNN-Wire™ & © 2019 Cable News Network, Inc., a Time Warner Company. All rights reserved.