Las Vegas (LAS) to Chicago (CHI): 1,511 miles (2,432 km) great-circle, about 3h 30m nonstop by our estimate. Cheapest fare observed: $170 round-trip on Frontier, nonstop, departing June 12, 2026.
$170 round-trip, Frontier F92146, departing 2026-06-12 at 23:45, returning 2026-06-14. The recorded itinerary left on a Friday, returning on a Sunday 2 nights later; the fare was observed 48 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $170, it ranked 7th of the 30 round-trip fares we recorded from LAS (median $271). That is 11.3 cents per great-circle mile (round-trip price over one-way distance), below the LAS median of 20.1 cents across 30 round-trip routes.
Routes from LAS of similar length: Mexico City (1,509 mi) at $289 and Nashville (1,584 mi) at $272.
Frontier had the cheapest fare on 11 of 30 LAS routes. It is the 15th longest of the 30 routes we track from LAS.
Of 33 departure airports with a fare to Chicago, Las Vegas (LAS) ranked 13th at $170. 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.