SEA → IADSeattle to Washington

live

Direct flights from Seattle (SEA) to Washington (IAD): 28 nonstop departures observed each week across 3 airlines. 92% of the last 24 tracked flights arrived within 15 minutes of schedule. The median arrival is 23 minutes early. 1 of the 24 tracked flights was cancelled. 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 14 November 2026 at 14:42 UTC.

Today, SEA → IAD

Sat 14 Nov · local times
  1. 08:07 AS737Alaska On scheduleGate C15 ·
  2. 08:09 UA672United Cancelled ·
  3. 11:55 DL541Delta Air Lines On scheduleGate B5 ·
  4. 21:49 AS367Alaska Sched 21:49Departure not confirmed by the board ·

Checked SEA board 06:42 · IAD board 06:18

SEA Seattle disrupted · +146
IAD Washington disrupted · +113
3,702 km · ~5h 15m est.
dep bank 08:07–21:4928x weekly
Runs reliable · 3 airlines · 28x weekly · nonstop
92% on time

of the last 24 tracked SEA → IAD flights arrived within 15 minutes

Median arrival delay is −23 min. 1 of 24 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival−23 minacross the last 23 arrivals
Flight time~5h 15mestimated from route distance
Weekly departures28x3 direct airlines on the leg
Cancelled4.2%recent route rate · 1 of 24

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 AirlinesAS92% on time

Flights AS737 08:07 daily · AS367 21:49 daily

Delta Air LinesDL100% on time

Flights DL541 varies daily

United AirlinesUA86% on time

Flights UA672 08:09 daily

History

operated legs · board outcomes
11-14UA672cancelledCNX
11-13AS737dep +33 → arr+22
11-13UA672arrived−13
11-12AS367arrived−1
11-12AS737arrived−23
11-12DL541arrived−18
11-12UA672arrived−26
11-11AS367arrived−21
11-11AS737arrived−25
11-11DL541arrived−8
11-11UA672arrived−9
11-10AS367arrived−22
11-10AS737arrived−43
11-10DL541arrived+6
11-10UA672arrived−43
11-09AS367arrived−23
11-09AS737arrived−37
11-09DL541arrived−28
11-09UA672arrived−41
11-08AS367arrived−21
11-08AS737arrived−37
11-08DL541arrived−33
11-08UA672arrived−35
11-07AS367arrived+11

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 +146 min disrupted 🌤 few clouds · S 10 kt Full SEA delay board →
IADWashington +113 min disrupted 🌤 mostly cloudy · NNW 14 kt Full IAD delay board →

Weather lens

Conditions are tightest at SEA and IAD: a 33% 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?

High disruption likely. Both endpoints currently score the same, route health score 0/100. 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 08:07 and evening departures around 21:49 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 28 flights a week between them. Compare carrier days and times in the airline list above.