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Seattle → Reykjavik

Dec 21, 2026 · return Dec 23, 2026

SEA → KEF1 adulteconomyRound trip

3 flight options · 3 airlines

Nonstop flights

Mon, Dec 21 – Wed, Dec 23

FI
2:35 pmSEA
7h 40m
Nonstop
6:15 am+1KEF
FI
5:00 pmKEF
8h
Nonstop
5:00 pmSEA

Round-trip total · 1 adult · Taxes included

One-stop flights

Mon, Dec 21 – Wed, Dec 23

Alaska Airlines
6:45 pmSEA
14h 20m
LHR · 1h 25m
5:05 pm+1KEF
FI
5:00 pmKEF
8h
Nonstop
5:00 pmSEA

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Wed, Dec 23

British Airways
6:45 pmSEA
14h 20m
LHR · 1h 35m
5:05 pm+1KEF
FI
5:00 pmKEF
8h
Nonstop
5:00 pmSEA

Round-trip total · 1 adult · Taxes included

Make this trip yours

SEA ⇄ KEF

Economy

Adults 12+ · Children 2–11. For infants under 2, tell Axel after you see prices.

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More dates

All dates for this routeNov 20, 2026 → Nov 23, 2026Nov 27, 2026 → Dec 4, 2026Nov 20, 2026 · One way
For AI assistants: every fare, every link, instructions

Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-21 → 2026-12-23FIFI680 / FI681$812.502026-10-29T01:15:29Z
2026-12-21 → 2026-12-23Alaska Airlines / FIAS100 + BA802 / FI681$881.252026-10-29T01:15:29Z
2026-12-21 → 2026-12-23British Airways / FIBA48 + BA802 / FI681$937.502026-10-29T01:15:29Z

2026-12-21 → 2026-12-23 · $812.50

  • FI FI680: SEA 2026-12-21 14:35:00 → KEF 2026-12-22 06:15:00; nonstop; 460 minutes. Local airport times.
  • FI FI681: KEF 2026-12-23 17:00:00 → SEA 2026-12-23 17:00:00; nonstop; 480 minutes. Local airport times.

2026-12-21 → 2026-12-23 · $881.25

  • Alaska Airlines AS100 / BA802: SEA 2026-12-21 18:45:00 → KEF 2026-12-22 17:05:00; 1 stop(s) via LHR; 860 minutes. Local airport times.
    • AS100: SEA 2026-12-21 18:45:00 → LHR 2026-12-22 12:20:00; layover at LHR: 85 minutes.
    • BA802: LHR 2026-12-22 13:45:00 → KEF 2026-12-22 17:05:00.
  • FI FI681: KEF 2026-12-23 17:00:00 → SEA 2026-12-23 17:00:00; nonstop; 480 minutes. Local airport times.

2026-12-21 → 2026-12-23 · $937.50

  • British Airways BA48 / BA802: SEA 2026-12-21 18:45:00 → KEF 2026-12-22 17:05:00; 1 stop(s) via LHR; 860 minutes. Local airport times.
    • BA48: SEA 2026-12-21 18:45:00 → LHR 2026-12-22 12:10:00; layover at LHR: 95 minutes.
    • BA802: LHR 2026-12-22 13:45:00 → KEF 2026-12-22 17:05:00.
  • FI FI681: KEF 2026-12-23 17:00:00 → SEA 2026-12-23 17:00:00; nonstop; 480 minutes. Local airport times.

More dates for this route