Home / Routes / KSEA → KDEN8,206 scheduled
SEA DEN2h 38m

The route from Seattle Tacoma International Airport (KSEA) in Seattle to Denver International Airport (KDEN) in Denver. SkyMeter tracks roughly 8,206 scheduled flights on this route across 25 carriers. The most active operator is UAL (UAL). Average block time is 2h 25m. Departures average 31 minutes off schedule, with 59% running more than 15 minutes late. The most common aircraft on this route is the BOEING Boeing 737-800.

Scheduled
8,206
last 487 days
ADS-B observed
1,676
Airlines
25
Avg dep delay
31m
Late >15 min
58.7%
Cancel rate
0.68%

Airlines on this route

11 carriers · scheduled

United Airlines
UAL · UA · 2,331 flights · avg 26m delay · 43.7% late
13 cancelled
Alaska Airlines
ASA · AS · 1,903 flights · avg 33m delay · 69.3% late
10 cancelled
Southwest Airlines Co
SWA · WN · 1,684 flights · avg 34m delay · 68.4% late
20 cancelled
Delta Air Lines
DAL · DL · 1,285 flights · avg 32m delay · 56.7% late
8 cancelled
Frontier Airlines
FFT · F9 · 560 flights · avg 32m delay · 54.1% late
5 cancelled
Air Transport International
ATN · 8C · 424 flights · avg 31m delay · 69.3% 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
Cobalt Air
CNS · CNS · 2 flights · avg 36m delay · 50.0% 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

ASA602N472ASB739
2026-09-03 21:20  →  2026-09-03 23:48  ·  2h 28m
Replay
ASA535N292AKB739
2026-09-03 17:06  →  2026-09-03 19:43  ·  2h 37m
Replay
DAL1358N310DUBCS3
2026-09-03 15:36  →  2026-09-03 18:19  ·  2h 43m
Replay
UAL2601N24537A21N
2026-09-03 11:51  →  2026-09-03 14:07  ·  2h 16m
Replay
ASA310N982AKB39M
2026-09-03 03:25  →  2026-09-03 05:57  ·  2h 31m
Replay
ATN3397N643AZB763
2026-09-02 23:18  →  2026-09-03 02:04  ·  2h 45m
Replay
DAL2543N323DUBCS3
2026-09-02 21:03  →  2026-09-02 23:45  ·  2h 42m
Replay
SWA1384N8771DB38M
2026-09-02 20:28  →  2026-09-02 23:08  ·  2h 40m
Replay
ASA304N956AKB39M
2026-09-02 19:49  →  2026-09-02 22:36  ·  2h 46m
Replay
UAL2832N14541A21N
2026-09-02 19:47  →  2026-09-02 22:43  ·  2h 55m
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 737-800
B738
17%
of flights
AIRBUS Airbus A321 Neo
A21N
16%
of flights
BOEING Boeing 737-900
B739
15%
of flights
BOEING Boeing 737 MAX 8
B38M
15%
of flights
AIRBUS-BOMBARDIER Airbus A220-300
BCS3
12%
of flights
BOEING Boeing 737 MAX 9
B39M
10%
of flights
BOEING Boeing 767-300
B763
4%
of flights
BOEING Boeing 737-700
B737
2%
of flights

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View KDEN → KSEA