What type of aircraft is N631SY?

N631SY is a Embraer S A ERJ 170-200 LL with 88 seats, according to the FAA aircraft register.

Which airline flies N631SY?

SkyWest Airlines (OO) flew N631SY most recently, according to US Department of Transportation flight records for July 2026.

Where does N631SY fly?

Its most frequent route in the last 12 months was Aspen to Denver (221 flights). It flew 1,703 flights in total, about 142 a month.

Is N631SY 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

N631SY

Embraer S A ERJ 170-200 LL, SkyWest Airlines

N631SY is a Embraer S A ERJ 170-200 LL flown by SkyWest Airlines. From August 2025 to July 2026 it flew 1,703 flights, most often Aspen to Denver, and 79% arrived within 15 minutes of schedule.

1,703

flights in 12 months

79%

on time (within 15 min)

airports

–

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 N631SY flies

Aspen to DenverASE to DEN221 flights
Denver to AspenDEN to ASE220 flights
Aspen to HoustonASE to IAH55 flights
Houston to AspenIAH to ASE46 flights
Los Angeles to AspenLAX to ASE46 flights
Aspen to Los AngelesASE to LAX42 flights
Chicago to AspenORD to ASE37 flights
Aspen to ChicagoASE to ORD28 flights
Denver to GunnisonDEN to GUC20 flights
Gunnison to DenverGUC to DEN18 flights

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

Month by month

Share of N631SY 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	73%	2.2%	136
September 2025	78%	0%	125
October 2025	87%	0%	143
November 2025	86%	2.6%	152
December 2025	69%	2%	150
January 2026	81%	6.6%	137
February 2026	73%	6.5%	108
March 2026	81%	5.4%	149
April 2026	82%	1.3%	151
May 2026	87%	0%	162
June 2026	71%	4.2%	143
July 2026	73%	0.7%	147

Questions and answers

What type of aircraft is N631SY?: N631SY is a Embraer S A ERJ 170-200 LL with 88 seats, according to the FAA aircraft register.
Which airline flies N631SY?: SkyWest Airlines (OO) flew N631SY most recently, according to US Department of Transportation flight records for July 2026.
Where does N631SY fly?: Its most frequent route in the last 12 months was Aspen to Denver (221 flights). It flew 1,703 flights in total, about 142 a month.
Is N631SY 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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