Newark (EWR) to San Francisco (SFO): 2,559 miles (4,118 km) great-circle, about 5h 35m nonstop by our estimate. Cheapest fare observed: $316 round-trip on Frontier, with 1 stop, departing June 17, 2026.
$316 round-trip, Frontier F92511, departing 2026-06-17 at 11:30, returning 2026-06-21. The recorded itinerary left on a Wednesday, returning on a Sunday 4 nights later; the fare was observed 53 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $316, it ranked 15th of the 30 round-trip fares we recorded from EWR (median $329). That is 12.3 cents per great-circle mile (round-trip price over one-way distance), below the EWR median of 16.5 cents across 30 round-trip routes.
Routes from EWR of similar length: Los Angeles (2,449 mi) at $215 and Las Vegas (2,222 mi) at $232.
Frontier had the cheapest fare on 4 of 30 EWR routes. It is the 15th longest of the 30 routes we track from EWR.
Of 19 departure airports with a fare to San Francisco, Newark (EWR) ranked 15th at $316. Lowest: $126 from Los Angeles (LAX); highest: $483 from New York (JFK); 6 nonstop. Cheapest-fare airlines (routes): Frontier (13), Southwest (3), American Airlines (1), United Airlines (1) and WestJet (1).
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.