Chicago (ORD) to Atlanta (ATL): 607 miles (976 km) great-circle, about 1h 45m nonstop by our estimate. Cheapest fare observed: $110 round-trip on Frontier, nonstop, departing May 15, 2026.
$110 round-trip, Frontier F92198, departing 2026-05-15 at 13:59, returning 2026-05-17. The recorded itinerary left on a Friday, returning on a Sunday 2 nights later; the fare was observed 20 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $110, it ranked 2nd of the 30 round-trip fares we recorded from ORD (median $221). That is 18.1 cents per great-circle mile (round-trip price over one-way distance), close to the ORD median of 16.6 cents across 30 round-trip routes.
Routes from ORD of similar length: Washington (587 mi) at $209 and Philadelphia (676 mi) at $121.
Frontier had the cheapest fare on 9 of 30 ORD routes. It is the 29th longest of the 30 routes we track from ORD.
Of 24 departure airports with a fare to Atlanta, Chicago (ORD) ranked 6th at $110. Lowest: $52 from Fort Lauderdale (FLL); highest: $1436 from Nairobi (NBO); 12 nonstop. Cheapest-fare airlines (routes): Frontier (20), Spirit (2), airline F2 (1) and Copa (1).
The reverse, Atlanta (ATL) to Chicago (CHI), was $89 round-trip on Frontier, nonstop, departing July 1, 2026. Atlanta to Chicago flights.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones America/Chicago, America/New_York; flight time is our estimate.