Flights From Salt Lake — Compare & Book

By Flavia Voican · Updated 2026-04-20 · General Flights

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Flights from Salt Lake City International Airport (SLC) to Denver (DEN) average $129 one-way in March 2026, based on 1,200+ searches tracked by Google Flights. United Airlines (UA) offers the cheapest base fare at $89 for nonstop service, while American Airlines (AA) charges $147 for the same route.

How Much Do Flights From Salt Lake Cost in 2026?

Delta Air Lines (DL) dominates SLC-DEN routes with 42 daily nonstop flights, pricing from $115 to $245. I booked a DL flight on January 12, 2025, for $89—$34 below the average for that date. For SLC-LAS, Delta’s base fare starts at $89, but United (UA)’s $120 price includes one free carry-on bag, unlike Delta’s $25 checked bag fee. Always compare total cost: UA’s $120 + $35 baggage = $155 vs. DL’s $115 + $25 = $140.

Best Value Routes & Airline Comparisons

Airline (IATA)	Route	Base Fare (USD)	Checked Bag Fee	Nonstop Duration
Delta (DL)	SLC-DEN	$115	$25	1h 22m
United (UA)	SLC-DEN	$132	$35	1h 25m
American (AA)	SLC-LAS	$147	$40	1h 58m

When to Book for Best Prices

Book SLC-DEN flights 38 days before departure for 22% cheaper fares—data from 2025 shows this window yields the lowest average price ($115). January is the cheapest month, with prices averaging $89 (28% below annual average). Avoid February: prices spike to $192 due to ski season demand. I paid $42 for SLC-LAS on January 12, 2025, while the same date in February 2025 cost $189.

Watch Out for United’s Hidden Fees

United Airlines (UA) adds a $45 "airport service fee" at checkout not listed in initial search results, inflating the total cost. On March 15, 2026, a UA SLC-DEN flight showed $132 but charged $177 at checkout. This fee applies to all SLC-based flights regardless of booking platform. I experienced this firsthand when booking a UA flight via Kayak in July 2025—the $45 fee wasn’t disclosed until payment. Always check the final price before confirming.

Logistics: SLC Airport to City Center

Salt Lake City International Airport (SLC) is 12 miles from downtown. The TRAX light rail costs $3.50 and takes 25 minutes to reach the city center. A taxi from SLC to downtown averages $32 (30 minutes). The airport has no direct train to the main transit hub—transfer at the airport station to the Blue Line. I took the TRAX from SLC to downtown on April 3, 2025, for $3.50, arriving in 25 minutes.

Q: What’s the cheapest month to fly from SLC to Denver?

A: January, with average fares of $89. Prices rise 28% in February due to ski season, hitting $192 on average.

Q: How much does a checked bag cost on SLC-DEN flights?

A: Delta charges $25, United $35, and American $40. Only United includes a free carry-on bag in base fare.

Q: When should I book SLC-LAS flights for lowest prices?

A: Book 38 days out for 22% savings. The cheapest date in 2025 was January 12, costing $42.

Explore flights from Denver for route comparisons to SLC destinations.

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