PlainFlights

Route · SLC → DEN · 2020–2025 BTS data

Salt Lake City to Denver

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SLC to DEN (Salt Lake City to Denver) ranks #20 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

78.8%
On-time
-0.2 pts
vs US avg
69 min
Delay when late
43,051
Flights
#20 of 4927
Corpus placement

Cancelled

0.6%

Best Month

Oct 2024 87%

Worst Month

Jul 2025 64%

Distance

391 mi

Carriers

20

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 623 146 3 4 DL,WN,F9,UA,OO
Nov 2025 589 91 14 0 OO,UA,DL,F9,WN
Oct 2025 662 135 0 0 OO,UA,WN,DL,F9
Sep 2025 644 125 1 2 UA,WN,OO,DL,F9
Aug 2025 669 190 3 4 OO,WN,F9,UA,DL
Jul 2025 688 247 7 4 OO,UA,WN,DL,F9
Jun 2025 664 225 2 6 OO,UA,WN,DL,F9
May 2025 644 209 1 2 OO,UA,WN,DL,F9
Apr 2025 635 174 2 1 DL,F9,OO,UA,WN
Mar 2025 673 135 2 0 OO,UA,WN,DL,F9
Feb 2025 614 145 0 0 DL,OO,UA,WN,F9
Jan 2025 648 146 1 0 DL,OO,UA,WN,F9
Dec 2024 641 111 0 0 DL,F9,OO,UA,WN
Nov 2024 600 117 7 0 OO,UA,WN,DL,F9
Oct 2024 661 83 0 0 UA,OO,WN,DL,F9
Sep 2024 648 83 1 0 WN,OO,UA,DL,F9
Aug 2024 695 191 6 6 DL,F9,WN,OO,UA
Jul 2024 703 169 15 5 DL,F9,OO,UA,WN
Jun 2024 686 173 5 2 DL,F9,OO,UA,WN
May 2024 725 186 3 0 DL,F9,OO,UA,WN
Apr 2024 705 157 1 0 DL,F9,OO,UA,WN
Mar 2024 726 137 13 0 DL,F9,OO,UA,WN
Feb 2024 637 135 3 1 DL,F9,OO,UA,WN
Jan 2024 665 146 8 0 DL,F9,WN,OO,UA

SLC–DEN seasonal on-time pattern

Best: November (85.0%) · weakest: July (72.1%)

70%75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 77.1%

Strongest calendar month

November

85.0% on-time · ~576 flights/mo

Busiest calendar month

March

~638 flights/mo avg

Weakest calendar month

July

72.1% on-time · ~635 flights/mo

Cancellation Rate

0.6%

98 of 15,845 flights

Diversion Rate

0.2%

37 of 15,845 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

SLC - Salt Lake City

Full on-time, delay-cause, and seasonal performance for Salt Lake City, UT.

SLC on-time profile

DEN - Denver

Full on-time, delay-cause, and seasonal performance for Denver, CO.

DEN on-time profile

Compare the two airports

See SLC and DEN side by side on delays, cancellations, and reliability.

Compare SLC vs DEN

Origin-hub reliability standing

Mid-pack among SLC departures

From SLC, this corridor sits with 31 other 75–85% on-time routes out of 85 tracked departures, not the hub's reliability leaders (54 at ≥85%) and not the softest ( 0 below 75%). Destination: Denver · fleet on-time rank #3592 of 4927.

What the Data Says About SLC to DEN

43,051 tracked flights put the SLC to DEN pairing (Salt Lake City to Denver) at a 78.8% on-time rate, squarely in line with the wider network. Delays that do occur run 69.3 minutes on average. Across the 391-mile route and its 20 carriers, the trailing 24 months show 0.6% cancelled and 0.2% diverted (15,845 flights sampled).

The monthly split is wide on this route: Oct 2024 posted the strongest performance at 87% on-time, while Jul 2025 came in at just 64% - a 23-point swing worth factoring into travel timing.

On the multi-year calendar, SLC–DEN peaks in November at 85.0% on-time while March carries the heaviest traffic (~638 flights per month) ; the softest month is July at 72.1%, a 12.9-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SLC to DEN rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SLC to DEN ranks #20 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from SLC to DEN? ▼
Flights from Salt Lake City to Denver have a 78.8% on-time rate based on 43,051 flights. The average delay is 69.3 minutes. The best recent month was Oct 2024 with 87% on-time.
What is the cancellation rate for SLC to DEN? ▼
Over the last 24 months, 0.6% of flights on this route were cancelled (98 of 15,845 flights) and 0.2% were diverted.
How far is the flight from SLC to DEN? ▼
The flight distance from Salt Lake City (SLC) to Denver (DEN) is approximately 391 miles. This route is served by 20 carriers.
When is the best time to fly from SLC to DEN? ▼
The best recent month for on-time performance was Oct 2024 (87% on-time). The worst was Jul 2025 (64% on-time). Consider booking during months with historically better performance.

Airports on this route

SLC Airport

Salt Lake City
DEN Airport

Denver
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using SLC–DEN data

SLC–DEN is mid-pack at 78.8% on-time; month and carrier mix move more than the corridor headline.

  • Compare SLC and DEN airport profiles: delay causes and top routes differ even on the same corridor. SLC airport
  • If your dates flex, November (85.0% on-time) beats July (72.1%) on this corridor. Seasonal chart
  • 4 other routes post a similar 78.8% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.