PlainFlights

Route · SLC → BOS · 2020–2025 BTS data

Salt Lake City to Boston

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SLC to BOS (Salt Lake City to Boston) ranks #1898 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
6,671
Flights
#1898 of 4927
Corpus placement

Cancelled

0.5%

Best Month

Oct 2024 92%

Worst Month

Aug 2024 65%

Distance

2,105 mi

Carriers

3

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 107 20 2 0 DL,B6
Nov 2025 97 11 0 0 B6,DL
Oct 2025 92 23 0 0 DL
Sep 2025 92 20 0 0 DL,B6
Aug 2025 116 17 1 0 B6,DL
Jul 2025 123 28 2 0 B6,DL
Jun 2025 109 22 1 0 B6,DL
May 2025 93 25 0 0 DL
Apr 2025 90 11 0 0 DL
Mar 2025 151 28 1 0 B6,DL
Feb 2025 96 16 0 1 B6,DL
Jan 2025 81 9 1 0 B6,DL
Dec 2024 88 27 0 0 B6,DL
Nov 2024 87 12 0 0 B6,DL
Oct 2024 112 9 0 0 DL,B6
Sep 2024 113 23 0 0 B6,DL
Aug 2024 124 43 0 1 B6,DL
Jul 2024 122 33 4 1 B6,DL
Jun 2024 120 32 1 1 B6,DL
May 2024 124 23 0 0 B6,DL
Apr 2024 120 24 0 0 B6,DL
Mar 2024 117 25 0 0 B6,DL
Feb 2024 85 15 0 0 B6,DL
Jan 2024 87 26 0 0 B6,DL

SLC–BOS seasonal on-time pattern

Best: November (87.3%) · weakest: December (76.7%)

75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 76.7%

Strongest calendar month

November

87.3% on-time · ~77 flights/mo

Busiest calendar month

July

~114 flights/mo avg

Weakest calendar month

December

76.7% on-time · ~84 flights/mo

Cancellation Rate

0.5%

13 of 2,546 flights

Diversion Rate

0.2%

4 of 2,546 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

BOS - Boston

Full on-time, delay-cause, and seasonal performance for Boston, MA.

BOS on-time profile

Compare the two airports

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

Compare SLC vs BOS

Origin-hub reliability standing

Mid-pack among SLC departures

From SLC, this corridor sits with 31 other 75–85% on-time routes out of 85 tracked departures, not the hub's reliability leaders (54 at ≥85%) and not the softest ( 0 below 75%). Destination: Boston · fleet on-time rank #2951 of 4927.

What the Data Says About SLC to BOS

6,671 tracked flights put the SLC to BOS pairing (Salt Lake City to Boston) at a 80.5% on-time rate, squarely in line with the wider network. Delays that do occur run 80.2 minutes on average. Across the 2,105-mile route and its 3 carriers, the trailing 24 months show 0.5% cancelled and 0.2% diverted (2,546 flights sampled).

The monthly split is wide on this route: Oct 2024 posted the strongest performance at 92% on-time, while Aug 2024 came in at just 65% - a 27-point swing worth factoring into travel timing.

On the multi-year calendar, SLC–BOS peaks in November at 87.3% on-time while July carries the heaviest traffic (~114 flights per month) ; the softest month is December at 76.7%, a 10.6-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SLC to BOS rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SLC to BOS ranks #1898 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 BOS? ▼
Flights from Salt Lake City to Boston have a 80.5% on-time rate based on 6,671 flights. The average delay is 80.2 minutes. The best recent month was Oct 2024 with 92% on-time.
What is the cancellation rate for SLC to BOS? ▼
Over the last 24 months, 0.5% of flights on this route were cancelled (13 of 2,546 flights) and 0.2% were diverted.
How far is the flight from SLC to BOS? ▼
The flight distance from Salt Lake City (SLC) to Boston (BOS) is approximately 2,105 miles. This route is served by 3 carriers.
When is the best time to fly from SLC to BOS? ▼
The best recent month for on-time performance was Oct 2024 (92% on-time). The worst was Aug 2024 (65% on-time). Consider booking during months with historically better performance.

Airports on this route

SLC Airport

Salt Lake City
BOS Airport

Boston
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–BOS data

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

  • Compare SLC and BOS airport profiles: delay causes and top routes differ even on the same corridor. SLC airport
  • If your dates flex, November (87.3% on-time) beats December (76.7%) 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.