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Route · MSO → SLC · 2020–2025 BTS data

Missoula to Salt Lake City

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), MSO to SLC (Missoula to Salt Lake City) ranks #1908 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

90.4%
On-time
+11.4 pts
vs US avg
111 min
Delay when late
6,616
Flights
#1908 of 4927
Corpus placement

Cancelled

0.9%

Best Month

Sep 2025 99%

Worst Month

Jan 2024 77%

Distance

436 mi

Carriers

3

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 90 8 2 0 DL,OO
Nov 2025 88 6 6 0 OO,DL
Oct 2025 92 6 0 0 OO,DL
Sep 2025 74 1 0 0 OO,DL
Aug 2025 93 9 0 0 OO,DL
Jul 2025 92 12 0 0 OO,DL
Jun 2025 90 7 0 0 OO,DL
May 2025 93 3 0 0 OO,DL
Apr 2025 90 7 0 0 DL,OO
Mar 2025 91 6 0 0 OO,DL
Feb 2025 78 17 0 0 OO,DL
Jan 2025 88 13 1 0 OO,DL
Dec 2024 90 14 1 0 DL,OO
Nov 2024 88 10 0 0 OO,DL
Oct 2024 92 12 0 0 OO,DL
Sep 2024 88 2 0 0 OO,DL
Aug 2024 92 18 0 0 DL,OO
Jul 2024 93 15 2 0 DL,OO
Jun 2024 89 8 0 1 DL,OO
May 2024 88 11 0 0 DL,OO
Apr 2024 86 8 0 0 DL,OO
Mar 2024 88 5 0 0 DL,OO
Feb 2024 80 5 0 0 OO
Jan 2024 87 20 7 0 OO

MSO–SLC seasonal on-time pattern

Best: September (95.4%) · weakest: December (80.7%)

75%80%85%90%95%100% JanFebMarAprMayJunJulAugSepOctNovDec 80.7%

Strongest calendar month

September

95.4% on-time · ~94 flights/mo

Busiest calendar month

July

~108 flights/mo avg

Weakest calendar month

December

80.7% on-time · ~88 flights/mo

Cancellation Rate

0.9%

19 of 2,120 flights

Diversion Rate

0.0%

1 of 2,120 flights

Explore origin & destination

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

MSO - Missoula

Full on-time, delay-cause, and seasonal performance for Missoula, MT.

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

Compare MSO vs SLC

Origin-hub reliability standing

Among MSO's stronger departures

MSO → SLC posts a 90.4% on-time rate, landing in the ≥85% band with 2 of 8 BTS-tracked routes leaving Missoula. The same hub also shows 6 mid-band and 0 challenged departures · fleet-wide on-time rank #121 of 4927 (highest on-time = #1).

What the Data Says About MSO to SLC

Missoula to Salt Lake City (MSO to SLC) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 90.4% on-time rate across 6,616 flights, with delays that do happen averaging 111.4 minutes. The corridor runs roughly 436 miles and is served by 3 carriers. Over the most recent 24 months, 19 of 2,120 flights were cancelled (0.9%) and 1 diverted (0.0%).

The monthly split is wide on this route: Sep 2025 posted the strongest performance at 99% on-time, while Jan 2024 came in at just 77% - a 22-point swing worth factoring into travel timing.

On the multi-year calendar, MSO–SLC peaks in September at 95.4% on-time while July carries the heaviest traffic (~108 flights per month) ; the softest month is December at 80.7%, a 14.7-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does MSO to SLC rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, MSO to SLC ranks #1908 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 MSO to SLC? ▼
Flights from Missoula to Salt Lake City have a 90.4% on-time rate based on 6,616 flights. The average delay is 111.4 minutes. The best recent month was Sep 2025 with 99% on-time.
What is the cancellation rate for MSO to SLC? ▼
Over the last 24 months, 0.9% of flights on this route were cancelled (19 of 2,120 flights) and 0.0% were diverted.
How far is the flight from MSO to SLC? ▼
The flight distance from Missoula (MSO) to Salt Lake City (SLC) is approximately 436 miles. This route is served by 3 carriers.
When is the best time to fly from MSO to SLC? ▼
The best recent month for on-time performance was Sep 2025 (99% on-time). The worst was Jan 2024 (77% on-time). Consider booking during months with historically better performance.

Airports on this route

MSO Airport

Missoula
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 MSO–SLC data

MSO–SLC runs 11.4 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare MSO and SLC airport profiles: delay causes and top routes differ even on the same corridor. MSO airport
  • If your dates flex, September (95.4% on-time) beats December (80.7%) on this corridor. Seasonal chart
  • 4 other routes post a similar 90.4% 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.