SEA → IADSeattle to Washington

live

Direct flights from Seattle (SEA) to Washington (IAD): 32 nonstop departures observed each week across 3 airlines. 97% of the last 30 tracked flights arrived within 15 minutes of schedule. The median arrival is 19 minutes early. No cancellations were recorded across the 30 tracked flights. The nonstop covers 3,702 km, an estimated 5 hours 15 minutes in the air. Measured by Pro Flight Search from live flight boards at Seattle and Washington. Updated 2 November 2026 at 07:22 UTC.

Today, SEA → IAD

Sun 1 Nov · local times
  1. 08:07 AS737Alaska Departed Landed 16:08 −6
  2. 08:09 UA672United Departed Landed 15:50 −18
  3. 11:58 DL541Delta Air Lines Departed Landed 19:46 −20
  4. 21:49 AS367Alaska Departed ·

Checked SEA board 23:22 · IAD board 22:18

SEA Seattle smooth · +5
IAD Washington smooth · +0
3,702 km · ~5h 15m est.
dep bank 08:09–21:3632x weekly
Runs reliable · 3 airlines · 32x weekly · nonstop
97% on time

of the last 30 tracked SEA → IAD flights arrived within 15 minutes

Median arrival delay is −19 min. 0 of 30 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival−19 minacross the last 30 arrivals
Flight time~5h 15mestimated from route distance
Weekly departures32x3 direct airlines on the leg
Cancelled0.0%recent route rate · 0 of 30

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Alaska AirlinesDelta Air LinesUnited Airlines

Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.

Who flies it

observed on the boards · 7 days
Alaska AirlinesAS100% on time

Flights AS737 08:15 daily · AS366 15:56 daily · AS367 21:36 Mo Th Fr Su

Delta Air LinesDL86% on time

Flights DL541 14:50 daily

United AirlinesUA100% on time

Flights UA672 08:09 daily

History

operated legs · board outcomes
11-01AS737arrived−6
11-01DL541arrived−20
11-01UA672arrived−18
10-31AS737arrived−4
10-31DL541arrived+13
10-31UA672arrived+1
10-30AS366arrived−19
10-30AS367arrived−35
10-30AS737arrived−47
10-30DL541arrived−18
10-30UA672arrived−29
10-29AS366arrived−13
10-29AS367arrived−24
10-29AS737arrived−53
10-29DL541arrived−33
10-29UA672arrived−19
10-28AS366arrived−19
10-28AS737arrived−40
10-28DL541arrived−9
10-28UA672arrived−26
10-27AS366arrived−23
10-27AS737arrived−35
10-27DL541arrived+32
10-27UA672arrived−7
10-26AS366arrived−26
10-26AS367arrived−12
10-26AS737arrived+1
10-26DL541arrived−4
10-26UA672arrived−5
10-25AS367arrived−25

Actual board outcomes rather than schedules, paired departure and arrival per flight and day.

Full board history, day by day →

Airports right now

live boards
SEASeattle +5 min smooth 🌤 clear · SE 4 kt Full SEA delay board →
IADWashington +0 min smooth 🌤 scattered clouds · SE 3 kt Full IAD delay board →

Weather lens

Conditions are tightest at SEA and IAD: a 34% chance of a 15+ minute delay. In this weather, the more delayed of the two airports is typically about +4 min. Both figures come from the two airports' delay records in similar weather. See live delays → · Weather risk by airport →

How the Seattle to Washington route actually runs

Pro Flight Search records official board updates for nonstop SEA to IAD flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.

Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search: Seattle (SEA) to Washington (IAD) route reliability, measured from operated flights on official airport boards.

Canonical URL
https://proflightsearch.com/search-flights/SEA-IAD
How we measure this →

SEA to IAD questions

Is SEA–IAD running on time right now?

Smooth skies ahead. The departure side at SEA is the weaker end, route health score 95/100. The airports section above carries the live status and delay window at both ends.

Morning or evening flight on SEA–IAD?

Operators schedule morning departures around 08:09 and evening departures around 21:36 from SEA. Earlier flights typically land before destination-airport delays accumulate later in the day; check the IAD delay card to confirm conditions when you'd arrive.

How long is the flight from SEA to IAD?

Great-circle distance is 3,702 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 291–347 min gate-to-gate on this route.

How often does SEA–IAD fly?

3 carriers operate this route, around 32 flights a week between them. Compare carrier days and times in the airline list above.