Home / Routes / KSEA → KIAD2,799 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 2,799 scheduled flights on this route across 13 carriers. The most active operator is ASA (ASA). Average block time is 4h 5m. Departures average 32 minutes off schedule, with 54% running more than 15 minutes late. The most common aircraft on this route is the BOEING Boeing 737 MAX 9.

Scheduled
2,799
last 543 days
ADS-B observed
393
Airlines
13
Avg dep delay
32m
Late >15 min
54.4%
Cancel rate
0.57%

Airlines on this route

7 carriers · scheduled

Alaska Airlines
ASA · AS · 1,246 flights · avg 31m delay · 61.7% late
4 cancelled
United Airlines
UAL · UA · 1,035 flights · avg 29m delay · 45.8% late
8 cancelled
Delta Air Lines
DAL · DL · 509 flights · avg 40m delay · 54.4% late
4 cancelled
Netjets Aviation
EJA · 1I · 6 flights · avg 12m delay · 16.7% 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

ASA737N266AKB739
2026-10-25 15:09  →  2026-10-25 20:03  ·  4h 54m
Replay
UAL672N17336B38M
2026-10-25 15:01  →  2026-10-25 19:44  ·  4h 42m
Replay
UAL2693N37318B38M
2026-10-25 06:13  →  2026-10-25 11:05  ·  4h 52m
Replay
ASA366N938AKB39M
2026-10-24 22:57  →  2026-10-25 03:36  ·  4h 38m
Replay
DAL541N324DUBCS3
2026-10-24 22:21  →  2026-10-25 03:18  ·  4h 56m
Replay
UAL1523N17429B39M
2026-10-24 15:22  →  2026-10-24 20:48  ·  5h 25m
Replay
ASA737N495ASB739
2026-10-24 15:14  →  2026-10-24 20:24  ·  5h 9m
Replay
UAL2693N17454B39M
2026-10-24 06:09  →  2026-10-24 10:45  ·  4h 35m
Replay
ASA367N953AKB39M
2026-10-24 04:28  →  2026-10-24 09:42  ·  5h 14m
Replay
ASA366N402ASB739
2026-10-23 22:54  →  2026-10-24 03:51  ·  4h 56m
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
46%
of flights
BOEING Boeing 737-900
B739
27%
of flights
AIRBUS-BOMBARDIER Airbus A220-300
BCS3
13%
of flights
BOEING Boeing 737 MAX 8
B38M
5%
of flights
BOEING Boeing 737-800
B738
4%
of flights
AIRBUS Airbus A320
A320
0%
of flights
CESSNA Cessna Citation Longitude
C700
0%
of flights
BOEING Boeing 737-700
B737
0%
of flights

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View KIAD → KSEA