UAL1660

UNITED AIRLINES INC · ORD → SEA

UAL1660 is operated by UNITED AIRLINES INC between Chicago O'Hare International Airport (KORD) and Seattle Tacoma International Airport (KSEA). The flight is most often flown by a BOEING Boeing 737 MAX 9. Typical block time is 3h 30m. SkyMeter has observed 148 legs of this flight number via ADS-B.

✈
FLIGHTS
148
last 90 days
⏱
AVG DURATION
3h 30m
tracked time
📅
SERVICE PERIOD
05/27/2025 → 07/19/2026
first → last seen
🗺
ROUTES / TYPES
9 / 5
city pairs · airframes
⚠
INCIDENT RATE
0.0%
0 flagged

Routes flown

By count · last 90 days

7
KORD → KSEA
71
avg 4h 2m · Chicago O'Hare → Seattle Tacoma
KSEA → KIAH
41
avg 4h 1m · Seattle Tacoma → George Bush Intercontinental Houston
KMSN → KORD
13
avg 38m · Dane County Regional Truax Field → Chicago O'Hare
KLAS → KIAH
7
avg 2h 46m · McCarran → George Bush Intercontinental Houston
KORD → KRNT
2
avg 4h 8m · Chicago O'Hare → Renton
WA85 → KSEA
1
avg 9m · Weyerhaeuser Heliport → Seattle Tacoma
2S1 → KIAH
1
avg 3h 58m · Vashon → George Bush Intercontinental Houston

Aircraft types

Equipment used on this number

5
B39M BOEING Boeing 737 MAX 9
73
A320 AIRBUS Airbus A320
43
A319 AIRBUS Airbus A319
15
B739 BOEING Boeing 737-900
13
A21N AIRBUS Airbus A321 Neo
6

Safety profile

Flagged flights · last 90 days

Go-arounds
0
Unstable approach
0
Rejected TO
0
Stall warnings
0
Overspeeds
0
Runway excursion
0
Counts represent flights with at least one occurrence of each flag, not the total event count. See /incidents for individual events.

Recent flights

Newest 30 operations of UAL1660

30
N17441BOEING Boeing 737 MAX 9
→
07/19/2026
4h 9m
No alerts
Replay Analysis
N818UAAIRBUS Airbus A319
→
07/19/2026
39m
No alerts
Replay Analysis
N37534BOEING Boeing 737 MAX 9
→
07/18/2026
3h 51m
No alerts
Replay Analysis
N483UAAIRBUS Airbus A320
→
07/18/2026
4h 15m
No alerts
Replay Analysis
N17452BOEING Boeing 737 MAX 9
→
07/17/2026
3h 40m
No alerts
Replay Analysis
N441UAAIRBUS Airbus A320
→
07/17/2026
43m
No alerts
Replay Analysis
N464UAAIRBUS Airbus A320
→
07/17/2026
4h 10m
No alerts
Replay Analysis
N97424BOEING Boeing 737 MAX 9
→
07/16/2026
4h 1m
No alerts
Replay Analysis
N465UAAIRBUS Airbus A320
→
07/16/2026
30m
No alerts
Replay Analysis
N445UAAIRBUS Airbus A320
→
07/16/2026
3h 59m
No alerts
Replay Analysis
N17429BOEING Boeing 737 MAX 9
→
07/15/2026
3h 52m
No alerts
Replay Analysis
N17429BOEING Boeing 737 MAX 9
→
07/15/2026
12m
No alerts
Replay Analysis
N851UAAIRBUS Airbus A319
→
07/15/2026
28m
No alerts
Replay Analysis
N851UAAIRBUS Airbus A319
→
07/15/2026
40m
No alerts
Replay Analysis
N482UAAIRBUS Airbus A320
→
07/15/2026
4h 2m
No alerts
Replay Analysis
N37531BOEING Boeing 737 MAX 9
→
07/14/2026
3h 38m
No alerts
Replay Analysis
N879UAAIRBUS Airbus A319
→
07/14/2026
44m
No alerts
Replay Analysis
N498UAAIRBUS Airbus A320
→
07/14/2026
3h 57m
No alerts
Replay Analysis
N77587BOEING Boeing 737 MAX 9
→
07/13/2026
3h 37m
No alerts
Replay Analysis
N841UAAIRBUS Airbus A319
→
07/13/2026
34m
No alerts
Replay Analysis
N451UAAIRBUS Airbus A320
→
07/13/2026
4h 8m
No alerts
Replay Analysis
N37577BOEING Boeing 737 MAX 9
→
07/12/2026
3h 48m
No alerts
Replay Analysis
N17429BOEING Boeing 737 MAX 9
→
07/11/2026
3h 57m
No alerts
Replay Analysis
N17429BOEING Boeing 737 MAX 9
→
07/11/2026
13m
No alerts
Replay Analysis
N474UAAIRBUS Airbus A320
→
07/11/2026
3h 59m
No alerts
Replay Analysis
N39423BOEING Boeing 737-900
→
07/10/2026
3h 54m
No alerts
Replay Analysis
N837UAAIRBUS Airbus A319
→
07/10/2026
39m
No alerts
Replay Analysis
N454UAAIRBUS Airbus A320
→
07/10/2026
3h 51m
No alerts
Replay Analysis
N77590BOEING Boeing 737 MAX 9
→
07/09/2026
3h 47m
No alerts
Replay Analysis
N843UAAIRBUS Airbus A319
→
07/09/2026
53m
No alerts
Replay Analysis
© SkyMeter · All flight data subject to ODbL attribution · Tracked: 90-day window