ON TIMEBOARD

SFO → PAE on time

San Francisco (San Francisco, CA) to Seattle Paine (Everett, WA). Every scheduled flight, September 2025 to August 2026.

On time
54%
arrived < 15 min late
Cancelled
2.7%
621 flights
Typical arrival
+6 min
median vs schedule
When late
+65 min
average delay
Flights / day
2
1 airline

54% of flights from San Francisco to Everett arrived on time over the past 12 months. That is worse than the typical U.S. route. 22% of flights arrived more than an hour late or not at all.

How late?

The on-time rate treats a flight 20 minutes late the same as one 5 hours late. Here's the split for SFO → PAE: when a flight was late, it was under 45 minutes late 44% of the time. About 1 in 6 flights landed an hour or more late, and 1 in 89 three hours or more; 2.7% were cancelled outright.

Share of all 621 scheduled flights, past 12 months, by arrival time against schedule.

By airline

AirlineFlightsOn timeCancelledTypical arrival1h+ lateAvg when lateOperated by
Alaska Airlines62154%2.7%+6 min17.2%+65 minHorizon Air

Airline = the name on the ticket. Regional flights (e.g. "Delta Connection") count under the ticketing airline, and the operator is listed.

Best time of day to fly

On-time rate by scheduled departure hour (local time at SFO). Delays build through the day as late planes knock on, so early flights usually do best.

30%65%100%8 a.m. departures: too few flights (81 flights)8a9 a.m. departures: too few flights (83 flights)9a10 a.m. departures: too few flights (68 flights)10a11 a.m. departures: too few flights (22 flights)11anoon departures: too few flights12p1 p.m. departures: too few flights (19 flights)1p2 p.m. departures: too few flights (11 flights)2p3 p.m. departures: too few flights3p4 p.m. departures: too few flights (13 flights)4p5 p.m. departures: too few flights5p6 p.m. departures: too few flights (33 flights)6p7 p.m. departures: too few flights (81 flights)7p8 p.m. departures: 44% on time (142 flights)448p9 p.m. departures: too few flights (68 flights)9p
SFO → PAE, share of flights arriving on time, by departure hour. Hours with under 100 flights are greyed out.
82%+ on time76–82%68–76%under 68%too few flights

Last flight of the day

On SFO → PAE, each airline's last flight of the day was cancelled 2.4% of the time, against 3.0% for its earlier flights, so here the last flight is actually the safer one. It arrived 3+ hours late 1.6% of the time (earlier flights: 1.5%). It matters more than the numbers suggest. Miss an earlier flight and there's another one that evening; miss the last one and you're usually waiting until morning.

AirlineLast departureLast: cancelledLast: 3h+ lateEarlier: cancelledNext morning
Alaska Airlines8:05 p.m.2.4%1.6%3.0%first flight 8:20 a.m.

Last flight = the airline's last scheduled departure on this route that day, on days it flies the route at least twice; past 12 months. Times are typical scheduled times over the latest three months.

By month

Each calendar month pooled over 2023–2026. Best: June (72%). Worst: April (51%).

40%70%100%Jan: too few flights (70 flights)JanFeb: too few flights (93 flights)FebMar: 59% on time (136 flights)59MarApr: 51% on time (147 flights)51AprMay: 55% on time (150 flights)55MayJun: 72% on time (148 flights)72JunJul: 70% on time (149 flights)70JulAug: 70% on time (169 flights)70AugSep: 69% on time (182 flights)69SepOct: 71% on time (168 flights)71OctNov: 68% on time (151 flights)68NovDec: 71% on time (112 flights)71Dec

By day of week

DayFlightsOn timeCancelled
Monday97——
Tuesday86——
Wednesday87——
Thursday92——
Friday95——
Saturday68——
Sunday96——

Why flights were late

Share of delay minutes on flights 15+ minutes late, as reported to BTS by the airlines.

Late inbound plane 74%Airline (crew, maintenance, ops) 15%Air traffic & airport (NAS) 10%

Cancellations: air traffic/airport 8 · airline 7 · weather 2

Month by month

Not enough months with data to draw a trend.

Flight numbers on this route

Regular flights with at least 120 scheduled trips in the past year. Sorted by departure time.

FlightDepartsFlightsOn timeCancelledTypical arrivalOperated by
AS 20838:05 p.m.18237%4.4%+27 minHorizon Air

Worst days in the past year

DateFlightsOn timeCancelled
Aug 24, 202630%0
Aug 27, 2026333%0
Aug 21, 2026333%1
Aug 31, 2026333%0
Aug 23, 2026367%0

Nearby airport alternatives

Other ways to make the same trip, using airports within 60 miles of San Francisco or Everett. SJC → SEA has been 28 points more reliable.

RouteFlightsOn timeCancelled
SFO → PAE (this route)62154%2.7%
SJC → SEA San Jose to Seattle-Tacoma4,46182%0.6%
OAK → SEA Oakland to Seattle-Tacoma2,30477%1.0%
SFO → SEA San Francisco to Seattle-Tacoma6,82471%1.1%

Questions

How often are flights from SFO to PAE on time?

54% of 621 scheduled flights from San Francisco, CA to Everett, WA arrived within 15 minutes of schedule between September 2025 and August 2026. 2.7% were cancelled.

What month has the most delays from SFO to PAE?

April (51% on time). The best month is June (72%), over 2023–2026.

Is the last flight of the day from SFO to PAE more likely to be cancelled?

No, the opposite. Each airline's last SFO–PAE flight of the day was cancelled 2.4% of the time over the past year, against 3.0% for its earlier flights. If the last flight is cancelled, the next one is usually the following morning.

Related

Domestic flights by the airlines that report to the U.S. DOT, plus their regional partners. "On time" means arriving less than 15 minutes after schedule; cancelled and diverted flights count as not on time. Past performance is a guide, not a forecast. Method.