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Route · SLC → BIL · 2020–2025 BTS data

Salt Lake City to Billings

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SLC to BIL (Salt Lake City to Billings) ranks #1959 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

90%
On-time
+11 pts
vs US avg
73 min
Delay when late
6,398
Flights
#1959 of 4927
Corpus placement

Cancelled

0.4%

Best Month

Sep 2025 97%

Worst Month

Dec 2025 83%

Distance

387 mi

Carriers

3

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 90 15 0 0 DL,OO
Nov 2025 88 5 3 0 OO,DL
Oct 2025 92 9 0 0 OO,DL
Sep 2025 90 3 0 0 OO,DL
Aug 2025 93 9 0 0 OO,DL
Jul 2025 92 11 1 0 DL,OO
Jun 2025 90 10 0 0 DL,OO
May 2025 93 7 0 0 DL,OO
Apr 2025 90 4 0 0 DL,OO
Mar 2025 91 4 0 0 DL,OO
Feb 2025 78 7 1 0 OO,DL
Jan 2025 88 13 0 0 OO,DL
Dec 2024 88 13 0 0 DL,OO
Nov 2024 85 7 0 0 OO,DL
Oct 2024 88 7 0 1 OO,DL
Sep 2024 81 7 0 0 OO,DL
Aug 2024 88 9 1 0 DL,OO
Jul 2024 91 9 3 0 DL,OO
Jun 2024 89 14 0 0 DL,OO
May 2024 88 12 0 1 DL,OO
Apr 2024 86 8 0 0 DL,OO
Mar 2024 88 12 0 0 DL,OO
Feb 2024 78 6 0 0 DL,OO
Jan 2024 87 13 0 0 DL,OO

SLC–BIL seasonal on-time pattern

Best: October (94.0%) · weakest: December (84.2%)

80%85%90%95% JanFebMarAprMayJunJulAugSepOctNovDec 84.2%

Strongest calendar month

October

94.0% on-time · ~89 flights/mo

Busiest calendar month

August

~103 flights/mo avg

Weakest calendar month

December

84.2% on-time · ~87 flights/mo

Cancellation Rate

0.4%

9 of 2,112 flights

Diversion Rate

0.1%

2 of 2,112 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

BIL - Billings

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

BIL on-time profile

Compare the two airports

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

Compare SLC vs BIL

Origin-hub reliability standing

Among SLC's stronger departures

SLC → BIL posts a 90% 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 #151 of 4927 (highest on-time = #1).

What the Data Says About SLC to BIL

Salt Lake City to Billings (SLC to BIL) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 90% on-time rate across 6,398 flights, with delays that do happen averaging 72.5 minutes. The corridor runs roughly 387 miles and is served by 3 carriers. Over the most recent 24 months, 9 of 2,112 flights were cancelled (0.4%) and 2 diverted (0.1%).

Monthly performance varies moderately here: Sep 2025 was the strongest month at 97% on-time versus Dec 2025 at 83%, a 13-point difference.

On the multi-year calendar, SLC–BIL peaks in October at 94.0% on-time while August carries the heaviest traffic (~103 flights per month) ; the softest month is December at 84.2%, a 9.8-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SLC to BIL rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SLC to BIL ranks #1959 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 BIL? ▼
Flights from Salt Lake City to Billings have a 90% on-time rate based on 6,398 flights. The average delay is 72.5 minutes. The best recent month was Sep 2025 with 97% on-time.
What is the cancellation rate for SLC to BIL? ▼
Over the last 24 months, 0.4% of flights on this route were cancelled (9 of 2,112 flights) and 0.1% were diverted.
How far is the flight from SLC to BIL? ▼
The flight distance from Salt Lake City (SLC) to Billings (BIL) is approximately 387 miles. This route is served by 3 carriers.
When is the best time to fly from SLC to BIL? ▼
The best recent month for on-time performance was Sep 2025 (97% on-time). The worst was Dec 2025 (83% on-time). Consider booking during months with historically better performance.

Airports on this route

SLC Airport

Salt Lake City
BIL Airport

Billings
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–BIL data

SLC–BIL runs 11 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 BIL airport profiles: delay causes and top routes differ even on the same corridor. SLC airport
  • If your dates flex, October (94.0% on-time) beats December (84.2%) on this corridor. Seasonal chart
  • 4 other routes post a similar 90% 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.