How long is the flight from Seattle to Reykjavík?

Non-stop flights on SEA → KEF are typically around 7.5 hours. Connecting itineraries add 3–8 hours depending on the hub and layover.

Which airlines fly from Seattle to Reykjavík?

The main carriers on this route are Icelandair, Delta. Codeshare and one-stop options add several more — the filter panel above shows every airline in the current fare set.

When is the cheapest time to fly from Seattle to Reykjavík?

Historically the lowest fares land in January, February, October. Summer (mid-June through mid-August) and the Christmas / New Year window are always peak. Mid-week departures (Tuesday–Thursday) typically beat weekend prices by 10–20%.

How far ahead should I book Seattle to Reykjavík?

Six to ten weeks ahead is the sweet spot for this route. Inside three weeks, fares tend to spike as airlines sell to last-minute business travellers. Award availability often opens 10–11 months out if you're booking on miles.

Can I book directly on destination.com?

The Book button on each fare opens the airline or OTA (Trip.com, Kiwi, Expedia, Booking, Priceline, etc.) that's actually selling that ticket. You complete payment there at the same price you saw here — we never add a markup.

SEA → KEF

Seattle to Reykjavík flights.

Live cached fares on Seattle (SEA) → Reykjavík (KEF), refreshed every 30 minutes. Non-stop and connecting itineraries side by side — compare airlines, times and stops, then book in one click.

Flying time
~7.5h non-stop
Airlines
Icelandair, Delta
Cheapest months
January, February, October

Flex dates · cheapest nearby

Loading prices…

Read our best-time-to-book guide for SEA → KEF →Target price, booking window, weekday pattern.

See 30-day price history for SEA → KEF →Median fare, lows, and best-day patterns.

No cached fares for exactly 2026-09-07 → 2026-09-14. Showing recent fares on SEA → KEF — pick a different date in the calendar above or run a live search.

Seattle → Reykjavík · 2 fares12-month low · $587

Cached from Travelpayouts · filter & sort below

Showing 2 of 2 results

Cheapest
Icelandair · FI 682
OutboundSEA → KEFWed, Aug 26 · 2:00 AM· 7h 25m· Non-stop
ReturnKEF ← SEASun, Aug 30 · 10:40 AM· 8h 5m· Non-stop
$587
total round-trip
Book →
WestJet · WS 1555
OutboundSEA → KEFTue, Aug 11 · 2:35 AM· 11h 30m· 2 stops
ReturnKEF ← SEASat, Aug 15 · 9:30 AM· 9h 45m· 2 stops
$1,163
total round-trip
Book →

Try a nearby airport

Thin routes often have more options from a neighbouring airport.

Portland (PDX) → Reykjavík (KEF)

nearby origin

About Seattle → Reykjavík

Icelandair is the flag carrier; stopover program lets you break up the journey to Europe for no extra fare.

Typical non-stop flying time is around 7.5 hours. Major carriers on this route include Icelandair, Delta. Fares are usually cheapest in January, February, October — book 6–10 weeks ahead and avoid school-holiday peaks (late June–August, Christmas–New Year) for the best pricing.

Month-by-month price guide: Seattle to Reykjavík

Live cheapest round-trip fare cached on SEA → KEF for each of the next 12 months. Tap any month and run a live search to confirm.

Jul
No data
Aug
Shoulder
from $587
Sep
No data
Oct
No data
Nov
No data
Dec
No data
Jan
No data
Feb
No data
Mar
No data
Apr
No data
May
No data
Jun
No data

Cheapest next 12 months: August from $587 round-trip. Run a live search →

Booking window tip

Medium-haul is the classic 6-10 week booking window. Fares drift down as the departure gets closer until about 21 days out, then start climbing fast. Tuesday and Wednesday departures are typically 10-18% cheaper than Friday or Sunday.

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Questions, answered

How long is the flight from Seattle to Reykjavík?
Non-stop flights on SEA → KEF are typically around 7.5 hours. Connecting itineraries add 3–8 hours depending on the hub and layover.
Which airlines fly from Seattle to Reykjavík?
The main carriers on this route are Icelandair, Delta. Codeshare and one-stop options add several more — the filter panel above shows every airline in the current fare set.
When is the cheapest time to fly from Seattle to Reykjavík?
Historically the lowest fares land in January, February, October. Summer (mid-June through mid-August) and the Christmas / New Year window are always peak. Mid-week departures (Tuesday–Thursday) typically beat weekend prices by 10–20%.
How far ahead should I book Seattle to Reykjavík?
Six to ten weeks ahead is the sweet spot for this route. Inside three weeks, fares tend to spike as airlines sell to last-minute business travellers. Award availability often opens 10–11 months out if you're booking on miles.
Can I book directly on destination.com?
The Book button on each fare opens the airline or OTA (Trip.com, Kiwi, Expedia, Booking, Priceline, etc.) that's actually selling that ticket. You complete payment there at the same price you saw here — we never add a markup.