Washington DC (DCA) to Los Angeles (LAX): 2,306 miles (3,711 km) great-circle, about 5h 05m nonstop by our estimate. Cheapest fare observed: $245 round-trip on Southwest, with 1 stop, departing June 24, 2026.
$245 round-trip, Southwest WN1428, departing 2026-06-24 at 19:55, returning 2026-08-11. The recorded itinerary left on a Wednesday, returning on a Tuesday 48 nights later; the fare was observed 60 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $245, it ranked 7th of the 30 round-trip fares we recorded from DCA (median $998). That is 10.6 cents per great-circle mile (round-trip price over one-way distance), below the DCA median of 26.4 cents across 30 round-trip routes.
Routes from DCA of similar length: San Diego (2,271 mi) at $230 and San Salvador (1,903 mi) at $275.
Southwest had the cheapest fare on 4 of 30 DCA routes. It is the 17th longest of the 30 routes we track from DCA.
Of 40 departure airports with a fare to Los Angeles, Washington DC (DCA) ranked 18th at $245. Lowest: $77 from Seattle (SEA); highest: $1224 from Sapporo (CTS); 11 nonstop. Cheapest-fare airlines (routes): Frontier (18), Spirit (5), Southwest (3), EVA Air (2), Fiji Airways (2) and WestJet (2), plus 8 more.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones America/New_York, America/Los_Angeles; flight time is our estimate.