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Route · BOI → SFO · 2020–2025 BTS data

Boise to San Francisco

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), BOI to SFO (Boise to San Francisco) ranks #1232 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

83.7%
On-time
+4.7 pts
vs US avg
85 min
Delay when late
9,544
Flights
#1232 of 4927
Corpus placement

Cancelled

0.5%

Best Month

Jan 2025 91%

Worst Month

May 2024 61%

Distance

522 mi

Carriers

5

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 153 40 1 3 UA,OO
Nov 2025 148 32 2 1 OO,UA
Oct 2025 130 27 0 0 OO,UA
Sep 2025 113 27 0 0 UA,OO
Aug 2025 116 12 1 1 OO,UA
Jul 2025 119 31 0 0 OO,UA
Jun 2025 121 20 0 0 OO,UA
May 2025 136 29 0 0 OO,UA
Apr 2025 129 29 0 0 OO,UA
Mar 2025 124 27 0 0 OO,UA
Feb 2025 112 23 1 0 OO,UA
Jan 2025 129 11 1 0 OO,UA
Dec 2024 155 37 2 0 OO,UA
Nov 2024 148 39 3 2 OO,UA
Oct 2024 156 32 0 0 UA,OO
Sep 2024 143 38 0 0 OO,UA
Aug 2024 133 29 1 0 OO,UA
Jul 2024 116 19 1 0 OO,UA
Jun 2024 90 24 0 1 OO,UA
May 2024 113 44 0 3 OO,UA
Apr 2024 103 40 0 1 OO
Mar 2024 107 34 1 0 OO
Feb 2024 106 35 0 2 OO
Jan 2024 109 19 0 1 OO,UA

BOI–SFO seasonal on-time pattern

Best: August (87.0%) · weakest: December (77.9%)

75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 77.9%

Strongest calendar month

August

87.0% on-time · ~140 flights/mo

Busiest calendar month

October

~147 flights/mo avg

Weakest calendar month

December

77.9% on-time · ~145 flights/mo

Cancellation Rate

0.5%

14 of 3,009 flights

Diversion Rate

0.5%

15 of 3,009 flights

Explore origin & destination

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

BOI - Boise

Full on-time, delay-cause, and seasonal performance for Boise, ID.

BOI on-time profile

SFO - San Francisco

Full on-time, delay-cause, and seasonal performance for San Francisco, CA.

SFO on-time profile

Compare the two airports

See BOI and SFO side by side on delays, cancellations, and reliability.

Compare BOI vs SFO

Origin-hub reliability standing

Mid-pack among BOI departures

From BOI, this corridor sits with 9 other 75–85% on-time routes out of 19 tracked departures, not the hub's reliability leaders (10 at ≥85%) and not the softest ( 0 below 75%). Destination: San Francisco · fleet on-time rank #1682 of 4927.

What the Data Says About BOI to SFO

Bureau of Transportation Statistics records show Boise to San Francisco (BOI to SFO) running a 83.7% on-time rate over 9,544 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 85.2 minutes. The 522-mile corridor is served by 5 carriers, and over the last 24 months 0.5% of 3,009 flights were cancelled, 0.5% diverted.

The monthly split is wide on this route: Jan 2025 posted the strongest performance at 91% on-time, while May 2024 came in at just 61% - a 30-point swing worth factoring into travel timing.

On the multi-year calendar, BOI–SFO peaks in August at 87.0% on-time while October carries the heaviest traffic (~147 flights per month) ; the softest month is December at 77.9%, a 9.1-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does BOI to SFO rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, BOI to SFO ranks #1232 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 BOI to SFO? ▼
Flights from Boise to San Francisco have a 83.7% on-time rate based on 9,544 flights. The average delay is 85.2 minutes. The best recent month was Jan 2025 with 91% on-time.
What is the cancellation rate for BOI to SFO? ▼
Over the last 24 months, 0.5% of flights on this route were cancelled (14 of 3,009 flights) and 0.5% were diverted.
How far is the flight from BOI to SFO? ▼
The flight distance from Boise (BOI) to San Francisco (SFO) is approximately 522 miles. This route is served by 5 carriers.
When is the best time to fly from BOI to SFO? ▼
The best recent month for on-time performance was Jan 2025 (91% on-time). The worst was May 2024 (61% on-time). Consider booking during months with historically better performance.

Airports on this route

BOI Airport

Boise
SFO Airport

San Francisco
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 BOI–SFO data

BOI–SFO runs 4.7 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare BOI and SFO airport profiles: delay causes and top routes differ even on the same corridor. BOI airport
  • If your dates flex, August (87.0% on-time) beats December (77.9%) on this corridor. Seasonal chart
  • 4 other routes post a similar 83.7% 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.