San Jose (SJC) to Chicago (CHI): 1,825 miles (2,937 km) great-circle, about 4h 10m nonstop by our estimate. Cheapest fare observed: $261 round-trip on Southwest, nonstop, departing May 22, 2026.
$261 round-trip, Southwest WN4252, departing 2026-05-22 at 22:55, returning 2026-05-25. The recorded itinerary left on a Friday, returning on a Monday 3 nights later; the fare was observed 27 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $261, it ranked 7th of the 30 round-trip fares we recorded from SJC (median $415). That is 14.3 cents per great-circle mile (round-trip price over one-way distance), below the SJC median of 23.1 cents across 30 round-trip routes.
Routes from SJC of similar length: Mexico City (1,852 mi) at $552 and Indianapolis (1,920 mi) at $448.
Southwest had the cheapest fare on 7 of 30 SJC routes. It is the 20th longest of the 30 routes we track from SJC.
Of 33 departure airports with a fare to Chicago, San Jose (SJC) ranked 22nd at $261. Lowest: $89 from Atlanta (ATL); highest: $1241 from Nairobi (NBO); 16 nonstop. Cheapest-fare airlines (routes): Frontier (15), Spirit (5), United Airlines (4), American Airlines (2), airline 0O (1) and Alaska Airlines (1), plus 5 more.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones America/Los_Angeles, America/Chicago; flight time is our estimate.