What type of aircraft is N121SY?

N121SY is a Embraer S A ERJ 170-200 LR with 88 seats, according to the FAA aircraft register.

Which airline flies N121SY?

SkyWest Airlines (OO) flew N121SY most recently, according to US Department of Transportation flight records for July 2026.

Where does N121SY fly?

Its most frequent route in the last 12 months was Memphis to Houston (15 flights). It flew 1,417 flights in total, about 118 a month.

N121SY was built in 2014, so it is 12 years old.

Is N121SY usually on time?

79% 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

N121SY

Embraer S A ERJ 170-200 LR, SkyWest Airlines

N121SY is a Embraer S A ERJ 170-200 LR flown by SkyWest Airlines, built in 2014. From August 2025 to July 2026 it flew 1,417 flights, most often Memphis to Houston, and 79% arrived within 15 minutes of schedule.

1,417

flights in 12 months

79%

on time (within 15 min)

airports

12 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 N121SY flies

Memphis to HoustonMEM to IAH15 flights
Tulsa to ChicagoTUL to ORD12 flights
Chicago to NashvilleORD to BNA10 flights
Nashville to ChicagoBNA to ORD10 flights
Chicago to MemphisORD to MEM8 flights
Denver to Oklahoma CityDEN to OKC8 flights
Little Rock to HoustonLIT to IAH7 flights
Oklahoma City to ChicagoOKC to ORD7 flights
Denver to Des MoinesDEN to DSM6 flights
Chicago to MilwaukeeORD to MKE6 flights

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

Month by month

Share of N121SY 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	86%	1.7%	115
September 2025	86%	0%	125
October 2025	86%	0%	111
November 2025	80%	5.3%	131
December 2025	65%	0%	124
January 2026	81%	8.1%	124
February 2026	74%	0%	111
March 2026	79%	6%	117
April 2026	72%	2.9%	138
May 2026	85%	3%	133
June 2026	75%	0.9%	117
July 2026	78%	2.8%	71

Questions and answers

What type of aircraft is N121SY?: N121SY is a Embraer S A ERJ 170-200 LR with 88 seats, according to the FAA aircraft register.
Which airline flies N121SY?: SkyWest Airlines (OO) flew N121SY most recently, according to US Department of Transportation flight records for July 2026.
Where does N121SY fly?: Its most frequent route in the last 12 months was Memphis to Houston (15 flights). It flew 1,417 flights in total, about 118 a month.
How old is N121SY?: N121SY was built in 2014, so it is 12 years old.
Is N121SY usually on time?: 79% 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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