Spirit Airways Sells the large Front Seat onboard its aircraft, which is similar to the seats in US domestic first class, but there's no other variance in provider or amenities for patrons seated in that part. Even so, it's important to notice that redeeming mileage with Delta might be expensive, https://businessflightshop.co.uk/blog/enjoy-your-honeymoon-in-goa-by-booking-the-cheapest-business-class-flights/