PlainFlights

Route · SLC → MSO · 2020–2025 BTS data

Salt Lake City to Missoula

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SLC to MSO (Salt Lake City to Missoula) ranks #1906 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

91%
On-time
+12 pts
vs US avg
85 min
Delay when late
6,617
Flights
#1906 of 4927
Corpus placement

Cancelled

0.8%

Best Month

Jun 2024 98%

Worst Month

Jun 2025 79%

Distance

436 mi

Carriers

3

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 90 7 2 1 DL,OO
Nov 2025 88 8 6 0 OO,DL
Oct 2025 92 7 0 0 OO,DL
Sep 2025 74 9 0 0 OO,DL
Aug 2025 93 9 0 0 OO,DL
Jul 2025 92 13 0 0 OO,DL
Jun 2025 90 19 0 0 OO,DL
May 2025 93 5 0 0 OO,DL
Apr 2025 90 4 0 0 DL,OO
Mar 2025 91 10 0 0 OO,DL
Feb 2025 78 8 0 0 OO,DL
Jan 2025 88 9 0 2 OO,DL
Dec 2024 90 18 0 1 DL,OO
Nov 2024 88 9 0 1 OO,DL
Oct 2024 92 4 0 0 OO,DL
Sep 2024 88 8 0 0 OO,DL
Aug 2024 92 12 0 0 DL,OO
Jul 2024 93 12 2 0 DL,OO
Jun 2024 89 2 0 1 DL,OO
May 2024 88 11 0 0 DL,OO
Apr 2024 86 10 0 0 DL,OO
Mar 2024 88 8 0 0 DL,OO
Feb 2024 80 5 0 0 OO
Jan 2024 88 17 6 3 DL,OO

SLC–MSO seasonal on-time pattern

Best: October (95.2%) · weakest: December (84.1%)

80%85%90%95%100% JanFebMarAprMayJunJulAugSepOctNovDec 84.1%

Strongest calendar month

October

95.2% on-time · ~91 flights/mo

Busiest calendar month

July

~108 flights/mo avg

Weakest calendar month

December

84.1% on-time · ~88 flights/mo

Cancellation Rate

0.8%

16 of 2,121 flights

Diversion Rate

0.4%

9 of 2,121 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

MSO - Missoula

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

MSO on-time profile

Compare the two airports

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

Compare SLC vs MSO

Origin-hub reliability standing

Among SLC's stronger departures

SLC → MSO posts a 91% on-time rate, landing in the ≥85% band with 54 of 85 BTS-tracked routes leaving Salt Lake City. The same hub also shows 31 mid-band and 0 challenged departures · fleet-wide on-time rank #94 of 4927 (highest on-time = #1).

What the Data Says About SLC to MSO

Salt Lake City to Missoula (SLC to MSO) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 91% on-time rate across 6,617 flights, with delays that do happen averaging 85.2 minutes. The corridor runs roughly 436 miles and is served by 3 carriers. Over the most recent 24 months, 16 of 2,121 flights were cancelled (0.8%) and 9 diverted (0.4%).

The monthly split is wide on this route: Jun 2024 posted the strongest performance at 98% on-time, while Jun 2025 came in at just 79% - a 19-point swing worth factoring into travel timing.

On the multi-year calendar, SLC–MSO peaks in October at 95.2% on-time while July carries the heaviest traffic (~108 flights per month) ; the softest month is December at 84.1%, a 11.1-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SLC to MSO rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SLC to MSO ranks #1906 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 MSO? ▼
Flights from Salt Lake City to Missoula have a 91% on-time rate based on 6,617 flights. The average delay is 85.2 minutes. The best recent month was Jun 2024 with 98% on-time.
What is the cancellation rate for SLC to MSO? ▼
Over the last 24 months, 0.8% of flights on this route were cancelled (16 of 2,121 flights) and 0.4% were diverted.
How far is the flight from SLC to MSO? ▼
The flight distance from Salt Lake City (SLC) to Missoula (MSO) is approximately 436 miles. This route is served by 3 carriers.
When is the best time to fly from SLC to MSO? ▼
The best recent month for on-time performance was Jun 2024 (98% on-time). The worst was Jun 2025 (79% on-time). Consider booking during months with historically better performance.

Airports on this route

SLC Airport

Salt Lake City
MSO Airport

Missoula
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–MSO data

SLC–MSO runs 12 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare SLC and MSO airport profiles: delay causes and top routes differ even on the same corridor. SLC airport
  • If your dates flex, October (95.2% on-time) beats December (84.1%) on this corridor. Seasonal chart
  • 4 other routes post a similar 91% 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.