San Francisco (SFO) to Las Vegas (LAS): 413 miles (665 km) great-circle, about 1h 20m nonstop by our estimate. Cheapest fare observed: $51 round-trip on Frontier, nonstop, departing May 18, 2026.
$51 round-trip, Frontier F94156, departing 2026-05-18 at 22:40, returning 2026-05-22. The recorded itinerary left on a Monday, returning on a Friday 4 nights later; the fare was observed 23 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $51, it was the cheapest of the 30 round-trip fares we recorded from SFO (median $646). That is 12.3 cents per great-circle mile (round-trip price over one-way distance), below the SFO median of 16.9 cents across 30 round-trip routes.
Routes from SFO of similar length: San Diego (447 mi) at $76 and Los Angeles (338 mi) at $116.
Frontier had the cheapest fare on 7 of 30 SFO routes. It is the 29th longest of the 30 routes we track from SFO.
Of 32 departure airports with a fare to Las Vegas, San Francisco (SFO) ranked 1st at $51. Lowest: $51 from San Francisco (SFO); highest: $465 from Los Cabos (SJD); 16 nonstop. Cheapest-fare airlines (routes): Frontier (24), Alaska Airlines (2), Air Canada (1), American Airlines (1), JetBlue (1) and Southwest (1), plus 2 more.
The reverse, Las Vegas (LAS) to San Francisco (SFO), was $153 round-trip on Frontier, nonstop, departing April 27, 2026. Las Vegas to San Francisco 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.