San Francisco→Narita SFO→NRT

Cancellation: 0% / Avg delay when late: 50min

Some airlines do not publish gate departure/arrival times. For those flights we estimate the gate times from the takeoff/landing record and the airport's measured taxi times (validated at 3.5 min mean error, 94.4% agreement on the on-time call). Without the estimate, those airlines' flights would drop out of the sample entirely and cross-airline comparison would break.

Flight time & service

Flight time (scheduled): 11h 5mActual average 10h 58m
Flights per day: 4
Airlines serving: 4

Flight time is the median scheduled gate-to-gate (block) time; the actual average excludes cancelled and diverted flights

By carrier

		Avg delay when late	n
JL	80%	+40min	n=25
UA	69.2%	+103min	n=26
NH	65.4%	+52min	n=26
ZG	30.8%	+27min	n=26

Avg delay when late counts only flights that departed more than 15 minutes behind schedule

By day of week

		Avg delay when late	n
Mon	66.7%	+43min	n=12
Tue	46.2%	+26min	n=13
Wed	47.1%	+83min	n=17
Thu	68.8%	+64min	n=16
Fri	75%	+64min	n=16
Sat	56.3%	+29min	n=16
Sun	69.2%	+21min	n=13

Avg delay when late counts only flights that departed more than 15 minutes behind schedule

By departure time

	On-time departure		Avg delay when late	n
6:00-9:00	—	Collecting data	+484min	n=1
9:00-12:00		72%	+48min	n=25
12:00-15:00		71.2%	+48min	n=52
15:00-18:00		32%	+27min	n=25

Avg delay when late counts only flights that departed more than 15 minutes behind schedule

Monthly trend

		Avg delay when late	n
2026-10	66.7%	+29min	n=12
2026-09	62.1%	+52min	n=116
2026-08	50.8%	+51min	n=120
2026-07	54.7%	+44min	n=64

Avg delay when late counts only flights that departed more than 15 minutes behind schedule

Flights on this route 4

See the full aircraft rotation history

Ship charts and fleet rotation show the last 3 days to everyone. Standard members (¥280/month) get the last 27 days for aircraft of Japanese airlines. The on-time data itself is free for all.

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Updated: 2026-10-06 / Last 28 days