Is your flight affected by Hurricane Helene? What you can do

(This story has been updated with new information.)
As Hurricane Helene continues its steady churn toward the U.S., airlines are starting to cancel flights ahead of its arrival.
Already, more than 450 U.S. flights are canceled for Thursday, including most flights in and out of Tallahassee, more than half the flights in and out Tampa, and a third of the flights in and out of Fort Myers, according to online flight tracker FlightAware.
“Devastating hurricane-force winds are expected across portions of northern Florida and southern Georgia where the core of Helene moves inland,” the National Hurricane Center said Wednesday morning.”
Whenever a flight is canceled for any reason, customers are eligible for a refund, but travelers have additional options if they want to rebook travel due to the storm.
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Here’s what some of America’s largest airlines are offering customers ahead of Helene’s arrival. 
Travelers with Alaska Airlines flights scheduled to and from the following airports between Sept. 25 and Sept. 27 may rebook or cancel their flights for free.
Travelers must change or cancel their flight prior to its departure. Their new travel date must be no later than Sept. 30. Customers who cancel their flight will get a credit for use on future travel. Additional details are available on Alaska Airlines’ website.
Travelers with American Airlines flights scheduled to, through, and from the following airports through Sept. 27 may rebook their flights for free. 
Travel through the southeastern U.S. must be rebooked by Sept. 28 for travel through Oct. 5. For travelers around the Gulf of Mexico, your flight must be rebooked by Sept. 27 and completed by Oct. 4 within the same fare class and cities as first booked to be eligible for waived fees. Additional details are available on American’s website. 
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Travelers with Breeze flights through the following airports between Sept. 25 and Sept. 27 may rebook or cancel their flights for flight credit for free.
If passengers are rebooking their flight, the new travel dates must be within 14 of their original departure date for no additional charges. They can also cancel their flight for redeemable flight credit. Additional information can be found on Breeze’s website.
Travelers with Delta flights scheduled to, through and from the following airports between Sept. 25 and Sept. 27 may rebook their flights for free. 
Tickets must be reissued by the end of the day on Oct. 4, completed no later than Oct. 4, and within the same fare, class to avoid differences in fare. Travelers who cannot fly by Oct. 4 may be subject to fare differences, but change fees will be waived.
Additionally, travelers headed through, into or out of Atlanta on Sept. 27 may rebook their flight by Oct. 1 for travel beginning no later than Oct. 1 for free. Fare differences may apply for travel after Oct. 1.
Customers who choose to cancel their flights will be issued flight credit valid for one year from the date the ticket was first issued. Details may be found on Delta’s website. 
Travelers with Frontier flights scheduled to, through and from the following airports may rebook without change fees, but fare differences may apply. 
Flights scheduled through Sept 25: 
Flights scheduled on Sept. 26 or Sept. 27: 
Travelers who choose to cancel their flights are eligible for travel credit, less any applicable cancellation or carrier fees, according to the airline. Details can be found on Frontier’s website. 
Travelers with JetBlue flights scheduled to or from the following airports between Sept. 26 and Sept. 27 may change or rebook their flights for free.
Their new flight must be no later than Oct. 2, or customers can get a full refund to their original form of payment. Additional information can be found on JetBlue’s website.
Travelers with Southwest flights scheduled to, through and from the following airports may rebook travel or fly standby for free within 14 days of their original travel dates. 
Flights scheduled through Sept 25: 
Flights scheduled through Sept. 27: 
Flights scheduled for Sept. 26 and Sept. 27:
Travel must be between the same cities as originally scheduled to avoid extra charges. Customers who opt not to travel can request a refund for the unused portion of their ticket or save the credit for a future flight. Additional details are available on Southwest’s website.  
Travelers with Spirit flights scheduled to, through and from the following airports may rebook without penalty if they fly by Oct. 2. 
Flights scheduled through Sept 25: 
Flights scheduled between Sept. 25 and Sept. 27: 
Fare differences will apply for travel after Oct. 2. Additional details can be found on Spirit’s website. 
Travelers with United flights scheduled to, through and from the following airports before Sept. 27 may rebook their flights for free. 
United will waive change fees and fare differences for travel completed by Oct. 4 within the same fare class and between the same cities as originally booked. Details are available on United’s website. 
Travelers scheduled to fly on other airlines, like Allegiant, should check with their respective carriers. 
Contributing: Kathleen Wong, USA TODAY