Resolves N/A if Frontier Airlines does not offer transatlantic flights in 2025. Resolves YES if in my judgement there is a GoWild! pass that applies to some transatlantic flights for some part of 2025.

amp says:

A Frontier GoWild! All-You-Can-Fly pass allows its holder to book an unlimited number of flights for a $0.01 airfare plus relevant per-passenger government fees and taxes while the pass is active, typically for 6-12 months. Under current rules, pass flights can be booked starting one day before departure for US domestic flights, and ten days before departure for international flights.

Frontier's 2022 Investor Presentation describes the pass as

Flights-as-a-Service (FLAAS)

GoWild!™All-You-Can-Fly Pass

Leverage otherwise empty seats into a new

recurring revenue stream & volume driver

It is also possible to book flights early by paying a variable "GoWild Early Booking Fee" for flights until December 16th 2023 and January 3rd - March 1st 2024. Some seats are always reserved for full-price tickets, so it's not always possible to book the last seat on a plane using the pass.

See for the unconditional timing of Frontier Airlines' transatlantic flights: