SEA → KEFSeattle to Reykjavík

live

Direct flights from Seattle (SEA) to Reykjavík (KEF): 14 nonstop departures observed each week across 2 airlines. 100% of the last 7 operated flights arrived within 15 minutes of schedule. The median arrival is 27 minutes early. No cancellations were recorded across the 7 tracked flights. The nonstop covers 5,811 km, an estimated 7 hours 57 minutes in the air. Measured by Pro Flight Search from live flight boards at Seattle and Reykjavík. Updated 8 September 2026 at 11:23 UTC.

SEA Seattle busy · +20
KEF Reykjavík smooth · +0
5,811 km · ~7h 57m est.
dep bank 15:40–23:2514x weekly
Runs reliable · 2 airlines · 14x weekly · nonstop
100% on time

of the last 7 operated SEA → KEF flights arrived within 15 minutes

Median arrival delay is −27 min. 0 of 7 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival−27 minacross the last 7 operated legs
Flight time~7h 57mestimated from route distance
Weekly departures14x2 direct airlines on the leg

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Alaska AirlinesIcelandair

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 AirlinesAS

Flights AS354 18:35 daily

IcelandairFI100% on time

Flights FI680 15:40 daily · FI682 19:00 daily · FI684 23:25 Mo Tu We Th Fr Sa

History

operated legs · board outcomes
09-07AS354arrived−27
09-07FI680arrived−49
09-07FI682arrived−1
09-06AS354arrived−8
09-06FI680arrived−33
09-06FI682arrived−20
09-06FI684arrived−41

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 +20 min busy 🌤 clear · NNE 9 kt Full SEA delay board →
KEFReykjavík +0 min smooth 🌤 clear · ENE 1 kt Full KEF delay board →

Weather lens

Current conditions put the pressure at SEA and KEF: 38% 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 Reykjavík route actually runs

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

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

SEA to KEF questions

Is SEA–KEF running on time right now?

Smooth skies ahead. The departure side at SEA is the weaker end, route health score 87/100. The airports section above carries the live status and delay window at both ends.

Morning or evening flight on SEA–KEF?

Operators schedule evening departures around 18:35 from SEA. Earlier flights typically land before destination-airport delays accumulate later in the day; check the KEF delay card to confirm conditions when you'd arrive.

How long is the flight from SEA to KEF?

Great-circle distance is 5,811 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 440–528 min gate-to-gate on this route.

How often does SEA–KEF fly?

2 carriers operate this route, around 27 flights a week between them. Compare carrier days and times in the airline list above.