What type of aircraft is N400SY?

N400SY is a Embraer S A ERJ 170-200 LR with 88 seats, according to the FAA aircraft register.

Which airline flies N400SY?

SkyWest Airlines (OO) flew N400SY most recently, according to US Department of Transportation flight records for July 2026.

Where does N400SY fly?

Its most frequent route in the last 12 months was Santa Ana to San Francisco (44 flights). It flew 1,800 flights in total, about 150 a month.

N400SY was built in 2018, so it is 8 years old.

Is N400SY usually on time?

82% of its flights from August 2025 to July 2026 arrived within 15 minutes of schedule. Punctuality depends far more on the route and the airline's day than on the aircraft itself.

US aircraft · OO

N400SY

Embraer S A ERJ 170-200 LR, SkyWest Airlines

N400SY is a Embraer S A ERJ 170-200 LR flown by SkyWest Airlines, built in 2018. From August 2025 to July 2026 it flew 1,800 flights, most often Santa Ana to San Francisco, and 82% arrived within 15 minutes of schedule.

1,800

flights in 12 months

82%

on time (within 15 min)

airports

8 yr

age

August 2025 to July 2026. Flights from US Bureau of Transportation Statistics on-time records (public domain); aircraft details from the FAA aircraft register.

Where N400SY flies

Santa Ana to San FranciscoSNA to SFO44 flights
San Francisco to Santa AnaSFO to SNA40 flights
Bellingham to SeattleBLI to SEA25 flights
San Diego to SacramentoSAN to SMF19 flights
Seattle to BellinghamSEA to BLI18 flights
Seattle to PortlandSEA to PDX15 flights
Portland to FresnoPDX to FAT14 flights
San Diego to FresnoSAN to FAT13 flights
San Diego to AustinSAN to AUS12 flights
Austin to San DiegoAUS to SAN12 flights

Its most frequent routes over the period. Each links to that route's punctuality page.

Month by month

Share of N400SY flights arriving within 15 minutes of schedule, by month. Green is the best month, orange the worst.

See the figures

Month	On time	Cancelled	Flights
August 2025	79%	0%	156
September 2025	90%	0%	163
October 2025	85%	4.7%	170
November 2025	82%	5.1%	175
December 2025	79%	2.9%	172
January 2026	87%	2.1%	95
February 2026	83%	0%	115
March 2026	91%	0%	53
April 2026	80%	1.3%	157
May 2026	80%	0.5%	189
June 2026	76%	1.7%	172
July 2026	78%	0%	183

Questions and answers

What type of aircraft is N400SY?: N400SY is a Embraer S A ERJ 170-200 LR with 88 seats, according to the FAA aircraft register.
Which airline flies N400SY?: SkyWest Airlines (OO) flew N400SY most recently, according to US Department of Transportation flight records for July 2026.
Where does N400SY fly?: Its most frequent route in the last 12 months was Santa Ana to San Francisco (44 flights). It flew 1,800 flights in total, about 150 a month.
How old is N400SY?: N400SY was built in 2018, so it is 8 years old.
Is N400SY usually on time?: 82% of its flights from August 2025 to July 2026 arrived within 15 minutes of schedule. Punctuality depends far more on the route and the airline's day than on the aircraft itself.

See how SkyWest Airlines compares with every other US airline.

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