Denver (DEN) to Salt Lake City (SLC): 390 miles (628 km) great-circle, about 1h 15m nonstop by our estimate. Cheapest fare observed: $49 round-trip on Frontier, nonstop, departing May 20, 2026.
$49 round-trip, Frontier F93861, departing 2026-05-20 at 06:00, returning 2026-05-26. The recorded itinerary left on a Wednesday, returning on a Tuesday 6 nights later; the fare was observed 25 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $49, it ranked 2nd of the 30 round-trip fares we recorded from DEN (median $204). That is 12.6 cents per great-circle mile (round-trip price over one-way distance), below the DEN median of 16.1 cents across 30 round-trip routes.
Routes from DEN of similar length: Tulsa (541 mi) at $223 and Phoenix (601 mi) at $48.
Frontier had the cheapest fare on 19 of 30 DEN routes. It is the 29th longest of the 30 routes we track from DEN.
Of 4 departure airports with a fare to Salt Lake City, Denver (DEN) ranked 1st at $49. Lowest: $49 from Denver (DEN); highest: $568 from San Jose (SJC); 1 nonstop. Cheapest-fare airlines (routes): Frontier (3) and Alaska Airlines (1).
The reverse, Salt Lake City (SLC) to Denver (DEN), was $70 round-trip on Frontier, nonstop, departing July 22, 2026. Salt Lake City to Denver flights.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones America/Denver, America/Denver; flight time is our estimate.