Home / Routes / KSEA → KIAD2,190 scheduled
SEA IAD4h 49m

The route from Seattle Tacoma International Airport (KSEA) in Seattle to Washington Dulles International Airport (KIAD) in Washington, DC. SkyMeter tracks roughly 2,190 scheduled flights on this route across 13 carriers. The most active operator is ASA (ASA). Average block time is 4h 42m. Departures average 33 minutes off schedule, with 64% running more than 15 minutes late. The most common aircraft on this route is the BOEING Boeing 737 MAX 9.

Scheduled
2,190
last 473 days
ADS-B observed
548
Airlines
13
Avg dep delay
33m
Late >15 min
63.6%
Cancel rate
0.73%

Airlines on this route

7 carriers · scheduled

Alaska Airlines
ASA · AS · 950 flights · avg 33m delay · 73.2% late
4 cancelled
United Airlines
UAL · UA · 830 flights · avg 30m delay · 54.1% late
8 cancelled
Delta Air Lines
DAL · DL · 403 flights · avg 40m delay · 61.0% late
4 cancelled
Netjets Aviation
EJA · 1I · 4 flights · avg 15m delay · 25.0% late
Nato North Atlantic Treaty Organisation
OAN · 1 flights · avg 80m delay · 100.0% late
Fltplan
DCM · 1 flights · avg 10m delay · 0.0% late
Flexjet
LXJ · LXJ · 1 flights · avg 40m delay · 100.0% late

Recent observed flights

From ADS-B trace data

ASA367N448ASB739
2026-08-19 05:46  →  2026-08-19 10:19  ·  4h 32m
Replay
ASA737N912AKB39M
2026-08-18 16:09  →  2026-08-18 20:56  ·  4h 47m
Replay
UAL1523N37545B39M
2026-08-18 15:23  →  2026-08-18 19:55  ·  4h 31m
Replay
UAL2467N77584B39M
2026-08-18 06:03  →  2026-08-18 10:40  ·  4h 36m
Replay
ASA367N720ALB39M
2026-08-18 06:02  →  2026-08-18 10:30  ·  4h 27m
Replay
ASA406N275AKB739
2026-08-18 00:00  →  2026-08-18 04:25  ·  4h 25m
Replay
DAL541N322DUBCS3
2026-08-17 22:59  →  2026-08-18 04:06  ·  5h 6m
Replay
ASA737N272AKB739
2026-08-17 16:59  →  2026-08-17 21:26  ·  4h 26m
Replay
UAL1523N17421B39M
2026-08-17 14:59  →  2026-08-17 19:37  ·  4h 37m
Replay
UAL2467N37466B739
2026-08-17 06:42  →  2026-08-17 11:11  ·  4h 28m
Replay

Codeshare partnerships

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

sells ASA 823
sells ASA 815
sells ASA 777
sells ASA 718
sells ASA 359
sells UAL 356
sells DAL 355
sells DAL 355
sells UAL 342
sells UAL 339
sells UAL 272
sells UAL 237
sells UAL 184
sells ASA 133
sells ASA 106
sells UAL 88
sells ASA 44
sells UAL 7

Typical aircraft

Observed via ADS-B on this route

BOEING Boeing 737 MAX 9
B39M
37%
of flights
BOEING Boeing 737-900
B739
25%
of flights
BOEING Boeing 737 MAX 8
B38M
14%
of flights
AIRBUS-BOMBARDIER Airbus A220-300
BCS3
13%
of flights
BOEING Boeing 737-800
B738
8%
of flights
BOEING Boeing 757-200
B752
0%
of flights
BOMBARDIER Bombardier BD-700 Global 5000
GL5T
0%
of flights
BOMBARDIER Bombardier Challenger 350
CL35
0%
of flights

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