Flight number record
AS 20
Alaska Airlines · San Francisco to New York
- Route
- SFO → JFK
- Departs
- 07:20
- Flights
- 321
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AS 20, check with Alaska Airlines.
AS 20 lands a B, 4 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by about an hour on average. That rests on 321 flights, with a median arrival 7 minutes early.
Key figures
On time
80.9%
Arrivals under 15 minutes late, of 309 completed flights
Avg delay
59 min
Across delayed arrivals only, not all flights
Cancelled
2.49%
National rate is 1.89%
1 hour+ late
6.5%
National rate is 8.3%
These figures cover 321 flights between September 2025 and August 2026. The median arrival is 7 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Schedule
When AS 20 flies
AS 20 flies SFO to JFK without a single fixed slot. Its most common scheduled departure was 07:20, used on 70 of 321 flights, with 13:30 (33 flights) next.
- Departs 07:2070 flights21.8%
- Departs 13:3033 flights10.3%
Scale runs 0% to 100%.
Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.
A 07:20 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and AS 20 runs 8 points worse at 80.9%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
AS 20 next to SFO to JFK
Every carrier on SFO to JFK combined arrived on time 78.0% of the time across 6,798 flights, so AS 20 is 3 points ahead of it. Alaska flew 1,112 flights on the same city pair under all its flight numbers, including this one, and those ran 78.6% on time. Across its whole network Alaska Airlines managed 79.7%, close to this flight's figure.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 20thin sample | 321 | 80.9% | 59 min | 2.49% | B |
| All Alaska Airlines on SFO–JFK | 1,112 | 78.6% | 56 min | 2.16% | B |
| All carriers on SFO–JFK | 6,798 | 78.0% | 80 min | 2.49% | B |
| Alaska Airlines, whole network | 309,844 | 79.7% | 52 min | 1.20% | B |
Across the year
AS 20 quarter by quarter
AS 20 did not run the same all year. Its best quarter was Apr–Jun 2026 at 88.3% on time and its weakest Oct–Dec 2025 at 74.2%, a swing of 14 points on roughly 80 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.
- Jul–Sep 202530 flights—
- Oct–Dec 202590 flights74.2%
- Jan–Mar 202661 flights84.5%
- Apr–Jun 202678 flights88.3%
- Jul–Sep 202662 flights82.1%
Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.
By weekday, AS 20 did best on Thursday at 89.1% on time and worst on Friday at 75.0%. Each day rests on about 46 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AS 20 runs when it is late
AS 20 often beats the schedule: 104 of 309 completed flights, 34%, arrived 15 minutes or more early. The 59 late arrivals split 22 under half an hour, 17 between 30 and 60 minutes, and 20 an hour or more.
- 15+ min early104 flights33.7%
- Within 15 min146 flights47.2%
- 15–29 min late22 flights7.1%
- 30–59 min late17 flights5.5%
- 1–2 hours late12 flights3.9%
- 2+ hours late8 flights2.6%
Scale runs 0% to 100%.
Share of 309 completed flights by arrival against schedule.
A late pushback is often recovered here: of 48 departures that left 15 minutes late or more, 15 still arrived on time. In the other direction, 26 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at JFK.
The worst days
Worst days for AS 20
The latest arrival of the period was on 3 August 2026, 4 hours 20 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 3 August 2026 | 4 hours 20 minutes | Late-arriving aircraft |
| 3 January 2026 | 3 hours 34 minutes | Late-arriving aircraft |
| 30 October 2025 | 3 hours 33 minutes | Extreme weather |
| 8 August 2026 | 2 hours 43 minutes | National Airspace System |
| 8 November 2025 | 2 hours 23 minutes | Late-arriving aircraft |
Delay causes
Why AS 20 runs late
National Airspace System accounts for 46% of the 3,504 delay minutes carriers reported here, and the remaining four split what is left.
- 46%National Airspace System
- 32%Late-arriving aircraft
- 11%Carrier
- 11%Extreme weather
Extreme weather accounts for 11% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 1.8 times the usual weather exposure. The split is drawn from 3,504 delay minutes reported on AS 20.
Cancellations sit at 2.49% against a national 1.89%, which is ordinary. Diversions add another 1.25%.
Connections and routes
What a delay on this flight costs
6.5% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.
At 2,586 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.
Every one of the 321 flights under AS 20 in the data flew SFO to JFK. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 321 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking AS 20
For a booking, read AS 20 as 80.9% on time with 2.49% cancelled over 321 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- SFO to JFK, every carrier and departure
- JFK to SFO, the return direction
- American Airlines 234 on the same route90.9%
- Delta Air Lines 405 on the same route88.8%
- JetBlue Airways 416 on the same route76.7%
- Delta Air Lines 383 on the same route87.1%
- JetBlue Airways 816 on the same route77.0%
- Delta Air Lines 668 on the same route73.1%
- San Francisco International (SFO) delay statistics
- John F. Kennedy International (JFK) delay statistics
- Alaska Airlines on-time record
- Every Alaska Airlines flight number with a record
- The most and least reliable flight numbers in the US
- The best time of day to fly, according to 7.05 million flight records
A flight number here means Alaska Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.
Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.