This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $99 fare is the cheapest current round-trip from Detroit (DTW) to BWI on Frontier flight F91516, departing 2026-08-10 at 12:50 with return on 2026-08-20.

Clicking "Book this flight" opens Kiwi.com with this exact flight pre-filtered — same airline, same dates, same passenger count.