Los Angeles (LAX) to Chicago (CHI): 1,741 miles (2,802 km) great-circle, about 4h 00m nonstop by our estimate. Cheapest fare observed: $126 round-trip on Frontier, with 1 stop, departing June 2, 2026.
$126 round-trip, Frontier F94964, departing 2026-06-02 at 05:45, returning 2026-06-05. The recorded itinerary left on a Tuesday, returning on a Friday 3 nights later; the fare was observed 38 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $126, it ranked 4th of the 30 round-trip fares we recorded from LAX (median $302). That is 7.2 cents per great-circle mile (round-trip price over one-way distance), below the LAX median of 15.3 cents across 30 round-trip routes.
Routes from LAX of similar length: Atlanta (1,942 mi) at $248 and Houston (1,387 mi) at $128.
Frontier had the cheapest fare on 11 of 30 LAX routes. It is the 22nd longest of the 30 routes we track from LAX.
Of 33 departure airports with a fare to Chicago, Los Angeles (LAX) ranked 4th at $126. 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.