Home / Routes / KSEA → KIAD2,014 scheduled
SEA IAD4h 50m

The route from Seattle Tacoma International Airport (KSEA) in Seattle to Washington Dulles International Airport (KIAD) in Washington, DC. SkyMeter tracks roughly 2,014 scheduled flights on this route across 13 carriers. The most active operator is ASA (ASA). Average block time is 4h 56m. Departures average 33 minutes off schedule, with 66% running more than 15 minutes late. The most common aircraft on this route is the BOEING Boeing 737 MAX 9.

Scheduled
2,014
last 445 days
ADS-B observed
519
Airlines
13
Avg dep delay
33m
Late >15 min
66.2%
Cancel rate
0.70%

Airlines on this route

7 carriers · scheduled

Alaska Airlines
ASA · AS · 869 flights · avg 32m delay · 76.6% late
4 cancelled
United Airlines
UAL · UA · 767 flights · avg 31m delay · 56.1% late
6 cancelled
Delta Air Lines
DAL · DL · 371 flights · avg 40m delay · 63.3% 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

ASA737N461ASB739
2026-07-19 16:29  →  2026-07-19 21:05  ·  4h 35m
Replay
ASA367N468ASB739
2026-07-19 06:01  →  2026-07-19 10:20  ·  4h 18m
Replay
ASA406N491ASB739
2026-07-18 23:01  →  2026-07-19 03:54  ·  4h 52m
Replay
UAL2131N27205B738
2026-07-18 20:02  →  2026-07-19 01:16  ·  5h 13m
Replay
ASA737N971AKB39M
2026-07-18 16:35  →  2026-07-18 21:19  ·  4h 43m
Replay
UAL2463N47332B38M
2026-07-18 15:09  →  2026-07-18 20:43  ·  5h 34m
Replay
ASA26N974AKB39M
2026-07-18 14:40  →  2026-07-18 19:57  ·  5h 16m
Replay
UAL264N17593B39M
2026-07-18 06:21  →  2026-07-18 11:05  ·  4h 43m
Replay
ASA367N947AKB39M
2026-07-18 05:51  →  2026-07-18 10:23  ·  4h 32m
Replay
DAL541N319DUBCS3
2026-07-18 00:00  →  2026-07-18 04:24  ·  4h 24m
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
36%
of flights
BOEING Boeing 737-900
B739
27%
of flights
AIRBUS-BOMBARDIER Airbus A220-300
BCS3
14%
of flights
BOEING Boeing 737 MAX 8
B38M
13%
of flights
BOEING Boeing 737-800
B738
6%
of flights
AIRBUS Airbus A319
A319
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