Home / Routes / KSEA → KIAD2,294 scheduled
SEA IAD4h 45m

The route from Seattle Tacoma International Airport (KSEA) in Seattle to Washington Dulles International Airport (KIAD) in Washington, DC. SkyMeter tracks roughly 2,294 scheduled flights on this route across 14 carriers. The most active operator is ASA (ASA). Average block time is 4h 34m. Departures average 33 minutes off schedule, with 62% running more than 15 minutes late. The most common aircraft on this route is the BOEING Boeing 737 MAX 9.

Scheduled
2,294
last 494 days
ADS-B observed
515
Airlines
14
Avg dep delay
33m
Late >15 min
62.2%
Cancel rate
0.70%

Airlines on this route

7 carriers · scheduled

Alaska Airlines
ASA · AS · 1,003 flights · avg 32m delay · 71.1% late
4 cancelled
United Airlines
UAL · UA · 863 flights · avg 30m delay · 53.1% late
8 cancelled
Delta Air Lines
DAL · DL · 421 flights · avg 40m delay · 59.9% 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

ASA737N408ASB739
2026-09-08 15:47  →  2026-09-08 20:24  ·  4h 36m
Replay
UAL1523N37450B39M
2026-09-08 15:10  →  2026-09-08 19:59  ·  4h 49m
Replay
UAL2467N17448B39M
2026-09-08 06:12  →  2026-09-08 10:56  ·  4h 43m
Replay
ASA367N277AKB739
2026-09-08 04:39  →  2026-09-08 09:23  ·  4h 44m
Replay
ASA675N461ASB739
2026-09-05 23:08  →  2026-09-06 04:01  ·  4h 53m
Replay
UAL1523N27463B39M
2026-09-05 14:56  →  2026-09-05 19:56  ·  5h 0m
Replay
UAL2467N17431B39M
2026-09-05 06:02  →  2026-09-05 11:04  ·  5h 1m
Replay
ASA675N278AKB739
2026-09-04 23:04  →  2026-09-05 04:06  ·  5h 1m
Replay
DAL541N335DUBCS3
2026-09-04 22:15  →  2026-09-05 03:57  ·  5h 41m
Replay
UAL1523N17437B39M
2026-09-04 15:06  →  2026-09-04 20:58  ·  5h 52m
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
39%
of flights
BOEING Boeing 737-900
B739
26%
of flights
AIRBUS-BOMBARDIER Airbus A220-300
BCS3
14%
of flights
BOEING Boeing 737 MAX 8
B38M
11%
of flights
BOEING Boeing 737-800
B738
7%
of flights
AIRBUS Airbus A320
A320
0%
of flights
BOEING Boeing 757-200
B752
0%
of flights
BOMBARDIER Bombardier BD-700 Global 5000
GL5T
0%
of flights

Looking for the return flight?

View KIAD → KSEA