Home / Routes / KSEA → KDEN7,007 scheduled
SEA DEN2h 35m

The route from Seattle Tacoma International Airport (KSEA) in Seattle to Denver International Airport (KDEN) in Denver. SkyMeter tracks roughly 7,007 scheduled flights on this route across 28 carriers. The most active operator is UAL (UAL). Average block time is 2h 40m. Departures average 30 minutes off schedule, with 64% running more than 15 minutes late. The most common aircraft on this route is the BOEING Boeing 737 MAX 8.

Scheduled
7,007
last 431 days
ADS-B observed
1,609
Airlines
28
Avg dep delay
30m
Late >15 min
64.1%
Cancel rate
0.76%

Airlines on this route

10 carriers · scheduled

United Airlines
UAL · UA · 1,998 flights · avg 26m delay · 47.1% late
13 cancelled
Alaska Airlines
ASA · AS · 1,613 flights · avg 33m delay · 76.6% late
10 cancelled
Southwest Airlines Co
SWA · WN · 1,440 flights · avg 33m delay · 74.8% late
18 cancelled
Delta Air Lines
DAL · DL · 1,122 flights · avg 31m delay · 61.0% late
7 cancelled
Frontier Airlines
FFT · F9 · 449 flights · avg 31m delay · 61.0% late
5 cancelled
Air Transport International
ATN · 8C · 368 flights · avg 30m delay · 74.5% late
Concesionaria Vuela Compania De Aviacion S.a. De C.v
VOI · Y4 · 12 flights · avg 10m delay · 0.0% late
Mn Airlines D/B/A Sun Country Airlines
SCX · SY · 3 flights · avg 23m delay · 33.3% late
Atlas Air
GTI · 5Y · 1 flights · avg —m delay · 0.0% late
Lgm Enterprises
JRE · 1 flights · avg 34m delay · 100.0% late

Recent observed flights

From ADS-B trace data

ASA242N448ASB739
2026-07-05 20:49  →  2026-07-05 23:18  ·  2h 28m
Replay
ASA242N448ASB739
2026-07-05 20:49  →  2026-07-05 23:18  ·  2h 28m
Replay
UAL1351N74532A21N
2026-07-05 19:45  →  2026-07-05 22:19  ·  2h 33m
Replay
UAL1351N74532A21N
2026-07-05 19:45  →  2026-07-05 22:19  ·  2h 33m
Replay
FFT3406N353FRA20N
2026-07-05 19:07  →  2026-07-05 22:30  ·  3h 23m
Replay
FFT3406N353FRA20N
2026-07-05 19:07  →  2026-07-05 22:30  ·  3h 23m
Replay
ASA535N296AKB739
2026-07-05 19:01  →  2026-07-05 21:45  ·  2h 43m
Replay
ASA535N296AKB739
2026-07-05 19:01  →  2026-07-05 21:45  ·  2h 43m
Replay
UAL757N27287B38M
2026-07-05 18:04  →  2026-07-05 20:44  ·  2h 40m
Replay
UAL757N27287B38M
2026-07-05 18:04  →  2026-07-05 20:44  ·  2h 40m
Replay

Codeshare partnerships

Marketing carriers selling tickets on this route under their own flight numbers

sells ASA 1522
sells ASA 1341
sells ASA 689
sells ASA 659
sells DAL 623
sells DAL 475
sells DAL 469
sells ASA 402
sells DAL 398
sells FFT 396
sells ASA 359
sells ASA 359
sells DAL 318
sells UAL 306
sells ASA 305
sells UAL 296
sells DAL 166
sells ASA 106
sells ASA 69
sells UAL 63

Typical aircraft

Observed via ADS-B on this route

BOEING Boeing 737 MAX 8
B38M
20%
of flights
BOEING Boeing 737-800
B738
17%
of flights
BOEING Boeing 737-900
B739
13%
of flights
AIRBUS-BOMBARDIER Airbus A220-300
BCS3
13%
of flights
AIRBUS Airbus A321 Neo
A21N
12%
of flights
BOEING Boeing 737 MAX 9
B39M
11%
of flights
BOEING Boeing 767-300
B763
3%
of flights
AIRBUS Airbus A320
A320
2%
of flights

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View KDEN → KSEA