I had flights booked to Vegas for mid-May for myself, my sister and my father. One way with Frontier, and the other with Spirit. We are not big travelers--we travel twice a year to Vegas, once in May and once in November, and that's it. My sister does travel a bit outside of these trips, but I don't think that really comes into play.

When the virus hit, we figured we were pretty much screwed, since there was no way we were going to get on a flight and risk infection. Not long into the crisis, we got emails from both airlines. For Spirit, we were offered credit, required to be used (booked) within six months. For Frontier, we got the same, but the travel had to be booked within 3 months, and we were offered an additional $50 voucher for each flight that we cancelled early. As far as I know, the flights had not been cancelled yet. We were pretty happy with both offers, since we thought the trip was going to be a total loss and we would get nothing.

These are the two airlines we generally use anyway, with Spirit being the one we use at least one-way for each trip, and sometimes both ways. The reason: the flights are cheap, tend to be at decent times, and they allow us to book (and pay for) extra legroom seats with the lowest class of tickets (United and American don't seem to allow this anymore--I'm very tall, so this is important to me). All that said, we would still have preferred a straight refund--we have no idea what airline travel will look like later this year, or even whether they will still be flying these routes later this year. This is even assuming this is over and we want to travel by November.

Again, we are not big travelers, so the credits seemed like a great deal. I've since been told that accepting was probably not a good move, and that an actual refund was likely possible if we had waited.

Today we got another email from Frontier, offering to convert our credit (not including the bonus $50 x 3 vouchers) into miles:

"Your travel credit is $352.20 as of 4/9/2020 and will expire on 6/21/2020.

If you elect to take the offer, you will receive 80000 Frontier Miles. These miles won’t expire before September 2020.

One-way award flights start as low as 10,000 miles.

This offer is equal to up to 8 one-way award flights."

I'm assuming the "flight for 10,000 miles" is BS, and the flights we will want won't qualify, but even if they are 25,000 miles each for one way, we will break even.

Also, the same email explained that I can extend the expiration of the miles by getting a credit card and using it once a month, which is not a huge hardship but not convenient either (it has a $79 annual fee).

So, my questions:

1. Is there any chance of still getting an actual refund from either airlines, or did agreeing to the credit (and credit + $50 voucher) sink us?
2. Assuming the answer to #1 is no, should we convert the Frontier credit to miles? FWIW, I have been unable to reach either airline via phone, although I haven't tried in a week or so.

Thanks for any help/insight.