Washington DC (IAD) to Miami (MIA): 923 miles (1,486 km) great-circle, about 2h 20m nonstop by our estimate. Cheapest fare observed: $211 round-trip on Frontier, with 1 stop, departing May 6, 2026.
$211 round-trip, Frontier F91081, departing 2026-05-06 at 11:12, returning 2026-05-08. The recorded itinerary left on a Wednesday, returning on a Friday 2 nights later; the fare was observed 11 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $211, it ranked 6th of the 30 round-trip fares we recorded from IAD (median $775). That is 22.9 cents per great-circle mile (round-trip price over one-way distance), close to the IAD median of 22.5 cents across 30 round-trip routes.
Routes from IAD of similar length: Fort Lauderdale (903 mi) at $186 and Orlando (752 mi) at $121.
Frontier had the cheapest fare on 8 of 30 IAD routes. It is the 25th longest of the 30 routes we track from IAD.
Of 30 departure airports with a fare to Miami, Washington DC (IAD) ranked 14th at $211. Lowest: $72 from Atlanta (ATL); highest: $1627 from Wellington (WLG); 10 nonstop. Cheapest-fare airlines (routes): Frontier (13), Spirit (4), Southwest (3), American Airlines (2), Arajet (2) and Avianca (1), plus 5 more.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones America/New_York, America/New_York; flight time is our estimate.