Flight number record

AS 20

Alaska Airlines · San Francisco to New York

Route: SFO → JFK
Departs: 13:24
Flights: 321
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s AS 20, check with Alaska Airlines.

AS 20 sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 4 points worse than the national rate of 77.6%. The late ones land about an hour behind schedule. That rests on 321 flights, with a median arrival 2 minutes early.

The national on-time rate over the same period is 77.6%, so AS 20 runs 4 points behind the country as a whole. Across a thousand flights that is about 43 extra late arrivals.

On time

73.3%

Arrivals under 15 minutes late, of 315 completed flights

Avg delay

62 min

Across delayed arrivals only, not all flights

Cancelled

1.56%

National rate is 1.81%

1 hour+ late

10.8%

National rate is 8.1%

These figures cover 321 flights between July 2025 and June 2026. Beyond the headline rate, 10.8% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Schedule

When AS 20 flies

AS 20 flies SFO to JFK without a single fixed slot. Its most common scheduled departure was 13:24, used on 50 of 321 flights, with 13:30 (45 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 13:2450 flights15.6%
Departs 13:3045 flights14.0%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 13:24 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and AS 20 runs 6 points worse at 73.3%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

AS 20 next to SFO to JFK

Every carrier on SFO to JFK combined arrived on time 80.1% of the time across 6,729 flights, so AS 20 is 7 points behind it. Alaska flew 1,107 flights on the same city pair under all its flight numbers, including this one, and those ran 76.8% on time. Across its whole network Alaska Airlines managed 79.1%, which this flight trails by 6 points.

AS 20 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
AS 20thin sample	321	73.3%	62 min	1.56%	C
All Alaska Airlines on SFO–JFK	1,107	76.8%	55 min	1.63%	B
All carriers on SFO–JFK	6,729	80.1%	78 min	1.98%	B
Alaska Airlines, whole network	293,372	79.1%	52 min	1.28%	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 Jul–Sep 2025 at 52.7%, a swing of 36 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 202592 flights52.7%
Oct–Dec 202590 flights74.2%
Jan–Mar 202661 flights84.5%
Apr–Jun 202678 flights88.3%

Scale runs 45% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, AS 20 ranged from 67.3% on Sunday to 75.6% on Friday. With about 46 flights behind each day, a spread of 8 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why AS 20 runs late

One category carries most of the weight here. National Airspace System accounts for 55% of the 5,238 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

National Airspace System
55%
Late-arriving aircraft
21%
Extreme weather
13%
Carrier
12%

Extreme weather accounts for 13% 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 2.0 times the usual weather exposure. The split is drawn from 5,238 delay minutes reported on AS 20.

Cancellations sit at 1.56% against a national 1.81%, which is ordinary. Diversions add another 0.31%.

Connections and routes

What a delay on this flight costs

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 10.8% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

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, AS 20 is one of the weaker ways to fly SFO to JFK: 7 points below the route as a whole. If the schedule allows, compare it with the other departures listed on the route page before settling on this one.

Where to go next

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, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures