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Route · SFO → SUN · 2020–2025 BTS data

San Francisco to Sun Valley/Hailey/Ketchum

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SFO to SUN (San Francisco to Sun Valley/Hailey/Ketchum) ranks #4729 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

87.7%
On-time
+8.7 pts
vs US avg
79 min
Delay when late
706
Flights
#4729 of 4927
Corpus placement

Cancelled

1.6%

Best Month

N/A

Worst Month

N/A

Distance

587 mi

Carriers

1

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 33 10 1 1 OO
Aug 2025 34 1 0 0 OO
Jul 2025 34 6 0 0 OO
Mar 2025 38 3 0 1 OO
Feb 2025 36 3 0 1 OO
Jan 2025 43 4 1 0 OO
Dec 2024 31 6 1 0 OO
Aug 2024 31 4 0 1 OO
Jul 2024 31 7 0 0 OO
Mar 2024 40 4 1 3 OO
Feb 2024 37 6 1 1 OO
Jan 2024 39 6 0 1 OO
Aug 2023 31 3 0 0 OO
Jul 2023 31 1 0 0 OO
Jan 2023 31 9 3 2 OO
Aug 2022 31 0 0 0 OO
Jul 2022 31 2 1 0 OO
Jan 2022 31 2 2 0 OO
Aug 2021 31 5 0 0 OO
Jul 2021 31 1 0 0 OO
Jan 2020 31 4 0 0 OO

SFO–SUN seasonal on-time pattern

Best: August (91.8%) · weakest: December (75.0%)

70%75%80%85%90%95% JanFebMarJulAugDec 75%

Strongest calendar month

August

91.8% on-time · ~32 flights/mo

Busiest calendar month

March

~39 flights/mo avg

Weakest calendar month

December

75.0% on-time · ~32 flights/mo

Cancellation Rate

1.6%

11 of 706 flights

Diversion Rate

1.6%

11 of 706 flights

Explore origin & destination

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

SFO - San Francisco

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

SFO on-time profile

SUN - Sun Valley/Hailey/Ketchum

Full on-time, delay-cause, and seasonal performance for Sun Valley/Hailey/Ketchum, ID.

SUN on-time profile

Compare the two airports

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

Compare SFO vs SUN

Origin-hub reliability standing

Among SFO's stronger departures

SFO → SUN posts a 87.7% on-time rate, landing in the ≥85% band with 20 of 73 BTS-tracked routes leaving San Francisco. The same hub also shows 50 mid-band and 3 challenged departures · fleet-wide on-time rank #489 of 4927 (highest on-time = #1).

What the Data Says About SFO to SUN

San Francisco to Sun Valley/Hailey/Ketchum (SFO to SUN) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 87.7% on-time rate across 706 flights, with delays that do happen averaging 78.5 minutes. The corridor runs roughly 587 miles and is served by 1 carrier. Over the most recent 24 months, 11 of 706 flights were cancelled (1.6%) and 11 diverted (1.6%).

Monthly performance data for this route did not show a clear best/worst split in the sample window; review the monthly table above for period-by-period detail.

On the multi-year calendar, SFO–SUN peaks in August at 91.8% on-time while March carries the heaviest traffic (~39 flights per month) ; the softest month is December at 75.0%, a 16.8-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SFO to SUN rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SFO to SUN ranks #4729 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 SFO to SUN? ▼
Flights from San Francisco to Sun Valley/Hailey/Ketchum have a 87.7% on-time rate based on 706 flights. The average delay is 78.5 minutes.
What is the cancellation rate for SFO to SUN? ▼
Over the last 24 months, 1.6% of flights on this route were cancelled (11 of 706 flights) and 1.6% were diverted.
How far is the flight from SFO to SUN? ▼
The flight distance from San Francisco (SFO) to Sun Valley/Hailey/Ketchum (SUN) is approximately 587 miles. This route is served by 1 carrier.

Airports on this route

SFO Airport

San Francisco
SUN Airport

Sun Valley/Hailey/Ketchum
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 SFO–SUN data

SFO–SUN runs 8.7 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare SFO and SUN airport profiles: delay causes and top routes differ even on the same corridor. SFO airport
  • If your dates flex, August (91.8% on-time) beats December (75.0%) on this corridor. Seasonal chart
  • 4 other routes post a similar 87.7% 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.