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Route · PHL → SLC · 2020–2025 BTS data

Philadelphia to Salt Lake City

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), PHL to SLC (Philadelphia to Salt Lake City) ranks #3313 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

80.5%
On-time
+1.5 pts
vs US avg
80 min
Delay when late
2,970
Flights
#3313 of 4927
Corpus placement

Cancelled

2.2%

Best Month

Nov 2024 85%

Worst Month

Dec 2025 54%

Distance

1,927 mi

Carriers

3

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 63 29 2 0 DL,AA
Nov 2025 44 7 0 0 DL
Oct 2025 48 6 0 0 DL
Sep 2025 48 7 0 0 DL,AA
Aug 2025 87 21 2 0 AA,DL
Jul 2025 92 35 6 1 AA,DL
Jun 2025 83 24 2 0 AA,DL
May 2025 48 7 0 0 DL
Apr 2025 46 12 1 0 DL
Mar 2025 49 12 0 0 DL
Feb 2025 42 9 1 0 DL
Jan 2025 50 12 0 0 AA,DL
Dec 2024 67 17 1 0 AA,DL
Nov 2024 53 8 0 0 DL,AA
Oct 2024 45 1 0 0 DL
Sep 2024 48 2 0 0 AA,DL
Aug 2024 87 34 4 0 AA,DL
Jul 2024 86 33 9 0 AA,DL
Jun 2024 80 22 3 0 AA,DL
May 2024 48 4 0 1 DL
Apr 2024 47 6 0 0 DL
Mar 2024 49 3 0 1 DL
Feb 2024 37 4 0 0 DL
Jan 2024 46 6 0 0 AA,DL

PHL–SLC seasonal on-time pattern

Best: May (93.0%) · weakest: July (66.4%)

60%70%80%90%100% JanFebMarAprMayJunJulAugSepOctNovDec 74.7%

Strongest calendar month

May

93.0% on-time · ~43 flights/mo

Busiest calendar month

June

~65 flights/mo avg

Weakest calendar month

July

66.4% on-time · ~59 flights/mo

Cancellation Rate

2.2%

31 of 1,393 flights

Diversion Rate

0.2%

3 of 1,393 flights

Explore origin & destination

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

PHL - Philadelphia

Full on-time, delay-cause, and seasonal performance for Philadelphia, PA.

PHL on-time profile

SLC - Salt Lake City

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

SLC on-time profile

Compare the two airports

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

Compare PHL vs SLC

Origin-hub reliability standing

Mid-pack among PHL departures

From PHL, this corridor sits with 60 other 75–85% on-time routes out of 65 tracked departures, not the hub's reliability leaders (4 at ≥85%) and not the softest ( 1 below 75%). Destination: Salt Lake City · fleet on-time rank #2942 of 4927.

What the Data Says About PHL to SLC

2,970 tracked flights put the PHL to SLC pairing (Philadelphia to Salt Lake City) at a 80.5% on-time rate, squarely in line with the wider network. Delays that do occur run 79.7 minutes on average. Across the 1,927-mile route and its 3 carriers, the trailing 24 months show 2.2% cancelled and 0.2% diverted (1,393 flights sampled).

The monthly split is wide on this route: Nov 2024 posted the strongest performance at 85% on-time, while Dec 2025 came in at just 54% - a 31-point swing worth factoring into travel timing.

On the multi-year calendar, PHL–SLC peaks in May at 93.0% on-time while June carries the heaviest traffic (~65 flights per month) ; the softest month is July at 66.4%, a 26.6-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does PHL to SLC rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, PHL to SLC ranks #3313 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 PHL to SLC? ▼
Flights from Philadelphia to Salt Lake City have a 80.5% on-time rate based on 2,970 flights. The average delay is 79.7 minutes. The best recent month was Nov 2024 with 85% on-time.
What is the cancellation rate for PHL to SLC? ▼
Over the last 24 months, 2.2% of flights on this route were cancelled (31 of 1,393 flights) and 0.2% were diverted.
How far is the flight from PHL to SLC? ▼
The flight distance from Philadelphia (PHL) to Salt Lake City (SLC) is approximately 1,927 miles. This route is served by 3 carriers.
When is the best time to fly from PHL to SLC? ▼
The best recent month for on-time performance was Nov 2024 (85% on-time). The worst was Dec 2025 (54% on-time). Consider booking during months with historically better performance.

Airports on this route

PHL Airport

Philadelphia
SLC Airport

Salt Lake City
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 PHL–SLC data

PHL–SLC is mid-pack at 80.5% on-time; month and carrier mix move more than the corridor headline.

  • Compare PHL and SLC airport profiles: delay causes and top routes differ even on the same corridor. PHL airport
  • If your dates flex, May (93.0% on-time) beats July (66.4%) on this corridor. Seasonal chart
  • 4 other routes post a similar 80.5% 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.