Los Angeles (LAX) to Seattle (SEA): 955 miles (1,537 km) great-circle, about 2h 25m nonstop by our estimate. Cheapest fare observed: $199 round-trip on Frontier, nonstop, departing May 8, 2026.
$199 round-trip, Frontier F91177, departing 2026-05-08 at 15:15, returning 2026-05-09. The recorded itinerary left on a Friday, returning on a Saturday 1 night later; the fare was observed 13 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $199, it ranked 11th of the 30 round-trip fares we recorded from LAX (median $302). That is 20.8 cents per great-circle mile (round-trip price over one-way distance), above the LAX median of 15.3 cents across 30 round-trip routes.
Routes from LAX of similar length: Denver (861 mi) at $121 and Vancouver (1,082 mi) at $144.
Frontier had the cheapest fare on 11 of 30 LAX routes. It is the 27th longest of the 30 routes we track from LAX.
Of 18 departure airports with a fare to Seattle, Los Angeles (LAX) ranked 5th at $199. Lowest: $122 from Houston (IAH); highest: $690 from Punta Cana (PUJ); 5 nonstop. Cheapest-fare airlines (routes): Frontier (13), Alaska Airlines (2), Air Canada (1), Southwest (1) and United Airlines (1).
The reverse, Seattle (SEA) to Los Angeles (LAX), was $77 round-trip on Frontier, nonstop, departing June 2, 2026. Seattle to Los Angeles flights.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones America/Los_Angeles, America/Los_Angeles; flight time is our estimate.