SEA → BWISeattle to Baltimore

live

Direct flights from Seattle (SEA) to Baltimore (BWI): 7 nonstop departures observed each week across 1 airline. 88% of the last 8 operated flights arrived within 15 minutes of schedule. The median arrival is 16 minutes early. No cancellations were recorded across the 8 tracked flights. The nonstop covers 3,748 km, an estimated 5 hours 18 minutes in the air. Measured by Pro Flight Search from live flight boards at Seattle and Baltimore. Updated 24 October 2026 at 19:33 UTC.

Today, SEA → BWI

Sat 24 Oct · local times
  1. 09:03 AS378Alaska Departed BWI est. 16:56In the air · sched 17:12

Checked SEA board 16:22 · BWI board 15:33

SEA Seattle heavy · +33
BWI Baltimore smooth · +0
3,748 km · ~5h 18m est.
dep bank 09:03–21:187x weekly
Runs reliable · 1 airline · 7x weekly · nonstop
88% on time

of the last 8 operated SEA → BWI flights arrived within 15 minutes

Median arrival delay is −16 min. 0 of 8 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival−16 minacross the last 8 operated legs
Flight time~5h 18mestimated from route distance
Weekly departures7x1 direct airline on the leg

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Alaska 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 AirlinesAS88% on time

Flights AS378 09:03 daily · AS781 21:18 Mo Tu We Th Fr Su

History

operated legs · board outcomes
10-24AS378arrived−16
10-23AS378arrived+12
10-23AS781arrived−19
10-22AS378arrived−29
10-22AS781arrived+21
10-21AS378arrived−25
10-21AS781arrived−30
10-20AS781arrived−7

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 +33 min heavy 🌤 mostly cloudy · ESE 4 kt Full SEA delay board →
BWIBaltimore +0 min smooth 🌤 few clouds · N 0 kt Full BWI delay board →

Weather lens

Current conditions put the pressure at SEA and BWI: 37% odds of a 15+ minute delay and around +6 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →

How the Seattle to Baltimore route actually runs

Pro Flight Search records official board updates for nonstop SEA to BWI 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 Baltimore (BWI) route reliability, measured from operated flights on official airport boards.

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

SEA to BWI questions

Is SEA–BWI running on time right now?

Mostly on schedule. The departure side at SEA is the weaker end, route health score 78/100. The airports section above carries the live status and delay window at both ends.

Morning or evening flight on SEA–BWI?

Operators schedule morning departures around 09:03 and evening departures around 21:18 from SEA. Earlier flights typically land before destination-airport delays accumulate later in the day; check the BWI delay card to confirm conditions when you'd arrive.

How long is the flight from SEA to BWI?

Great-circle distance is 3,748 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 295–351 min gate-to-gate on this route.

How often does SEA–BWI fly?

Alaska Airlines runs the route with about 13 flights a week (daily). Since one carrier owns the route, a single disruption tends to ripple through the day.