App for sorting flights on a specific airline with no defined destination?
 

My girlfriend and I each have discount vouchers for Frontier. We'd like to be able to define a set of travel dates and then have an app display all of Frontiers flights from our departure city, sorted based on price low to high, without specifying a destination. We just want to see everything that's available. Is there an app that will do this?

Google flights, set United States as destination, filter on Airline = Frontier

Does this actually still work for you? Recently I've only been able to filter on the 3 alliances when in Explore mode (the view with the map). I only get a filter for specific airlines when in Flights mode (the table) which only works if you put in one or more specific destinations. I know Google is constantly testing things live so it's possible I'm seeing something different.