Narita→San Francisco NRT→SFO

Cancellation: 2.7% / Avg delay when late: 52min

Some airlines do not publish gate departure/arrival times.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): 9h 30mActual average 9h 17m
Flights per day: 4.1
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
UA	81.5%	+130min	n=27
NH	66.7%	+51min	n=27
JL	50%	+36min	n=26
ZG	44.4%	+39min	n=27

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	57.1%	+86min	n=14
Tue	53.8%	+56min	n=13
Wed	43.8%	+36min	n=16
Thu	81.3%	+57min	n=16
Fri	50%	+65min	n=16
Sat	62.5%	+32min	n=16
Sun	75%	+31min	n=16

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
9:00-12:00	—	Collecting data	+267min	n=1
15:00-18:00		75.5%	+64min	n=53
18:00-21:00		48.1%	+38min	n=27
21:00-24:00		46.2%	+39min	n=26

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%	+34min	n=12
2026-09	56.9%	+54min	n=116
2026-08	65%	+51min	n=120
2026-07	57.8%	+52min	n=64

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

Flights on this route 4

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Updated: 2026-10-06 / Last 28 days