FYI, looks like Frontier is providing a number of reasonable options, assuming your flight is actually acnceled.

Option #1 – Up to $75 for travel on another airline
If you prefer, we'll reimburse up to $75 per traveler for travel on another airline within 72 hours.

Here's how it works: To purchase your tickets within the next 24 hours for one-way travel to be completed within 72 hours, please visit https://rebook.tripeasy.com, using your Last Name and Frontier confirmation code to login. Then, book and pay for your one-way travel. Within 14 business days, a reimbursement check will be mailed to the address you provide on the payment page of the booking process.

Option #2 – Full credit for your ticket + a $100 Frontier voucher per traveler
If you prefer to travel with Frontier at another time, we'll provide you with full credit for the unused value of your Frontier ticket plus a $100 voucher per traveler valid for future travel with Frontier.

• Your credit will be sent to you within one week, and will be available for use for booking future travel on Frontier for 90 days from the date the credit was issued; your future travel does not need to be completed within 90 days
• Your voucher(s) will be sent to you within one week, and will be valid for redemption through December 31, 2020; your future travel does not need to be completed by December 31
• Voucher(s) and credits are valid for one-time use in booking future air travel on Frontier; Voucher(s) are applicable to ticket fare only, and not to taxes or fees

Here's how it works: Submit a request for your credit and voucher at http://bit.ly/FrontierReimburse and select "Credit and Voucher" from the drop-down menu.

Option #3 – Up to $75 for alternative transportation
If you prefer, we'll reimburse you up to $75 for alternative transportation (i.e. car rental, train).

Here's how it works: Submit a copy of your receipt(s) within 30 days of your original travel date to http://bit.ly/FrontierReimburse and select "Other Reimbursement" from the drop-down menu.

Option #4 – Refund
Here's how it works: Submit a request for your refund at http://bit.ly/FrontierReimburse and select "Refund" from the drop-down menu.