Flight number record

AS 1420

Alaska Airlines · Portland to Houston

Route: PDX → IAH
Departs: 10:30
Flights: 348
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s AS 1420, check with Alaska Airlines.

AS 1420 lands a B+, 5 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by about 45 minutes on average. That is a workable record, not a spotless one. That rests on 348 flights, with a median arrival 6 minutes early.

Set against the rest of the country, AS 1420's record is 5 points better than the US average of 77.6%. That gap is worth roughly 52 fewer late arrivals for every thousand flights.

On time

82.8%

Arrivals under 15 minutes late, of 344 completed flights

Avg delay

44 min

Across delayed arrivals only, not all flights

Cancelled

0.86%

National rate is 1.81%

1 hour+ late

2.6%

National rate is 8.1%

These figures cover 348 flights between July 2025 and June 2026. The median arrival is 6 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.

Schedule

When AS 1420 flies

AS 1420 flies PDX to IAH without a single fixed slot. Its most common scheduled departure was 10:30, used on 60 of 348 flights, with 10:47 (57 flights) and 10:33 (45 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 10:3060 flights17.2%
Departs 10:4757 flights16.4%
Departs 10:3345 flights12.9%

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 10:30 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and AS 1420 runs level with that at 82.8%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

AS 1420 next to PDX to IAH

Every carrier on PDX to IAH combined arrived on time 85.4% of the time across 1,233 flights, so AS 1420 is 3 points behind it. Across its whole network Alaska Airlines managed 79.1%, which this flight beats by 4 points.

AS 1420 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
AS 1420thin sample	348	82.8%	44 min	0.86%	B+
All Alaska Airlines on PDX–IAHthin sample	353	83.1%	44 min	0.85%	B+
All carriers on PDX–IAH	1,233	85.4%	65 min	0.65%	A+
Alaska Airlines, whole network	293,372	79.1%	52 min	1.28%	B

Across the year

AS 1420 quarter by quarter

AS 1420 did not run the same all year. Its best quarter was Apr–Jun 2026 at 94.5% on time and its weakest Oct–Dec 2025 at 70.5%, a swing of 24 points on roughly 87 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 flights82.4%
Oct–Dec 202590 flights70.5%
Jan–Mar 202675 flights83.8%
Apr–Jun 202691 flights94.5%

Scale runs 60% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, AS 1420 ranged from 78.0% on Friday to 86.8% on Tuesday. With about 50 flights behind each day, a spread of 9 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why AS 1420 runs late

One category carries most of the weight here. National Airspace System accounts for 51% of the 2,611 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
51%
Carrier
26%
Late-arriving aircraft
20%
Security
3%

51% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 1,324 minutes out of 2,611, against a national NAS share of 21%. The split is drawn from 2,611 delay minutes reported on AS 1420.

Cancellations are rare at 0.86%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 2.6% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

At 1,825 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 348 flights under AS 1420 in the data flew PDX to IAH. 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. 348 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 1420

For a booking, read AS 1420 as 82.8% on time with 0.86% cancelled over 348 flights. Those are rates from the past twelve months, not a forecast for any particular day.

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