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Route · MKE → SLC · 2020–2025 BTS data

Milwaukee to Salt Lake City

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), MKE to SLC (Milwaukee to Salt Lake City) ranks #4446 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

89.6%
On-time
+10.6 pts
vs US avg
119 min
Delay when late
1,075
Flights
#4446 of 4927
Corpus placement

Cancelled

0.7%

Best Month

N/A

Worst Month

N/A

Distance

1,247 mi

Carriers

4

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 31 14 1 0 DL,OO
Oct 2025 31 2 0 0 DL
Aug 2025 31 3 0 0 DL
Jul 2025 31 2 0 0 DL
Jun 2025 30 1 0 0 DL
May 2025 31 2 0 0 DL
Apr 2025 30 2 0 0 DL
Mar 2025 31 3 0 0 DL
Jan 2025 31 4 0 0 OO,DL
Dec 2024 32 1 0 0 DL,OO
Oct 2024 31 1 0 0 DL
Sep 2024 30 0 0 0 DL
Aug 2024 31 2 0 1 DL
Jul 2024 31 2 2 0 DL
Jun 2024 30 2 0 0 DL
May 2024 31 4 0 0 DL
Apr 2024 30 2 0 0 DL
Mar 2024 31 3 0 0 DL
Jan 2024 32 6 0 0 DL,OO
Dec 2023 32 3 0 0 OO,DL
Oct 2023 31 2 0 0 DL,OO
Sep 2023 30 4 1 0 OO
Aug 2023 31 8 0 0 DL,OO
Jul 2023 30 2 1 0 DL

MKE–SLC seasonal on-time pattern

Best: September (95.6%) · weakest: December (77.6%)

75%80%85%90%95%100% JanMarAprMayJunJulAugSepOctDec 77.6%

Strongest calendar month

September

95.6% on-time · ~30 flights/mo

Busiest calendar month

January

~32 flights/mo avg

Weakest calendar month

December

77.6% on-time · ~31 flights/mo

Cancellation Rate

0.7%

5 of 740 flights

Diversion Rate

0.1%

1 of 740 flights

Explore origin & destination

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

MKE - Milwaukee

Full on-time, delay-cause, and seasonal performance for Milwaukee, WI.

MKE 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 MKE and SLC side by side on delays, cancellations, and reliability.

Compare MKE vs SLC

Origin-hub reliability standing

Among MKE's stronger departures

MKE → SLC posts a 89.6% on-time rate, landing in the ≥85% band with 9 of 27 BTS-tracked routes leaving Milwaukee. The same hub also shows 18 mid-band and 0 challenged departures · fleet-wide on-time rank #179 of 4927 (highest on-time = #1).

What the Data Says About MKE to SLC

Milwaukee to Salt Lake City (MKE to SLC) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 89.6% on-time rate across 1,075 flights, with delays that do happen averaging 119.0 minutes. The corridor runs roughly 1,247 miles and is served by 4 carriers. Over the most recent 24 months, 5 of 740 flights were cancelled (0.7%) and 1 diverted (0.1%).

Monthly performance data for this route did not show a clear best/worst split in the sample window; review the monthly table above for period-by-period detail.

On the multi-year calendar, MKE–SLC peaks in September at 95.6% on-time while January carries the heaviest traffic (~32 flights per month) ; the softest month is December at 77.6%, a 18.0-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does MKE to SLC rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, MKE to SLC ranks #4446 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 MKE to SLC? ▼
Flights from Milwaukee to Salt Lake City have a 89.6% on-time rate based on 1,075 flights. The average delay is 119.0 minutes.
What is the cancellation rate for MKE to SLC? ▼
Over the last 24 months, 0.7% of flights on this route were cancelled (5 of 740 flights) and 0.1% were diverted.
How far is the flight from MKE to SLC? ▼
The flight distance from Milwaukee (MKE) to Salt Lake City (SLC) is approximately 1,247 miles. This route is served by 4 carriers.

Airports on this route

MKE Airport

Milwaukee
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 MKE–SLC data

MKE–SLC runs 10.6 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare MKE and SLC airport profiles: delay causes and top routes differ even on the same corridor. MKE airport
  • If your dates flex, September (95.6% on-time) beats December (77.6%) on this corridor. Seasonal chart
  • 4 other routes post a similar 89.6% 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.