Seattle (SEA) to London (LHR) · Dec 16, 2026 · return Dec 21, 2026

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

See flights for these dates: each price link opens AI flight search for that row's exact dates and travelers. Select the complete itinerary there.

Route overview: Seattle to London (LHR) flight deals

2026-12-16 → 2026-12-21 · Axel-exclusive $928.25

• Alaska Airlines AS100: SEA 2026-12-16 18:45:00 → LHR 2026-12-17 12:20:00; nonstop; 575 minutes. Local airport times.
• Alaska Airlines AS101: LHR 2026-12-21 14:45:00 → SEA 2026-12-21 17:00:00; nonstop; 615 minutes. Local airport times.

2026-12-16 → 2026-12-21 · Axel-exclusive $1022.25

• British Airways BA52: SEA 2026-12-16 13:40:00 → LHR 2026-12-17 07:10:00; nonstop; 570 minutes. Local airport times.
• British Airways BA49: LHR 2026-12-21 14:55:00 → SEA 2026-12-21 16:50:00; nonstop; 595 minutes. Local airport times.

2026-12-16 → 2026-12-21 · Axel-exclusive $1045.75

• Delta Air Lines DL20: SEA 2026-12-16 16:50:00 → LHR 2026-12-17 10:40:00; nonstop; 590 minutes. Local airport times.
• Delta Air Lines DL21: LHR 2026-12-21 12:20:00 → SEA 2026-12-21 14:50:00; nonstop; 630 minutes. Local airport times.

2026-12-16 → 2026-12-21 · Axel-exclusive $728.50

• FI FI680 / FI450: SEA 2026-12-16 14:35:00 → LHR 2026-12-17 10:50:00; 1 stop(s) via KEF; 735 minutes. Local airport times.
  • FI680: SEA 2026-12-16 14:35:00 → KEF 2026-12-17 06:15:00; layover at KEF: 80 minutes.
  • FI450: KEF 2026-12-17 07:35:00 → LHR 2026-12-17 10:50:00.
• FI FI451 / FI681: LHR 2026-12-21 12:15:00 → SEA 2026-12-21 17:00:00; 1 stop(s) via KEF; 765 minutes. Local airport times.
  • FI451: LHR 2026-12-21 12:15:00 → KEF 2026-12-21 15:30:00; layover at KEF: 90 minutes.
  • FI681: KEF 2026-12-21 17:00:00 → SEA 2026-12-21 17:00:00.

2026-12-16 → 2026-12-21 · Axel-exclusive $951.75

• Air France AF77 / AF1780: SEA 2026-12-16 16:05:00 → LHR 2026-12-17 13:45:00; 1 stop(s) via CDG; 820 minutes. Local airport times.
  • AF77: SEA 2026-12-16 16:05:00 → CDG 2026-12-17 10:50:00; layover at CDG: 145 minutes.
  • AF1780: CDG 2026-12-17 13:15:00 → LHR 2026-12-17 13:45:00.
• Air France AF1381 / AF76: LHR 2026-12-21 06:20:00 → SEA 2026-12-21 13:50:00; 1 stop(s) via CDG; 930 minutes. Local airport times.
  • AF1381: LHR 2026-12-21 06:20:00 → CDG 2026-12-21 08:40:00; layover at CDG: 225 minutes.
  • AF76: CDG 2026-12-21 12:25:00 → SEA 2026-12-21 13:50:00.

2026-12-16 → 2026-12-21 · Axel-exclusive $980.75

• Air Canada AC8807 / AC860: SEA 2026-12-16 15:15:00 → LHR 2026-12-17 11:50:00; 1 stop(s) via YVR; 755 minutes. Local airport times.
  • AC8807: SEA 2026-12-16 15:15:00 → YVR 2026-12-16 17:26:00; layover at YVR: 114 minutes.
  • AC860: YVR 2026-12-16 19:20:00 → LHR 2026-12-17 11:50:00.
• Delta Air Lines DL21: LHR 2026-12-21 12:20:00 → SEA 2026-12-21 14:50:00; nonstop; 630 minutes. Local airport times.

2026-12-16 → 2026-12-21 · Axel-exclusive $1022.25

• British Airways BA48: SEA 2026-12-16 18:45:00 → LHR 2026-12-17 12:10:00; nonstop; 565 minutes. Local airport times.
• British Airways BA49: LHR 2026-12-21 14:55:00 → SEA 2026-12-21 16:50:00; nonstop; 595 minutes. Local airport times.

2026-12-16 → 2026-12-21 · Axel-exclusive $903.25

• Alaska Airlines AS442 / BA66: SEA 2026-12-16 09:05:00 → LHR 2026-12-17 06:35:00; 1 stop(s) via PHL; 810 minutes. Local airport times.
  • AS442: SEA 2026-12-16 09:05:00 → PHL 2026-12-16 17:08:00; layover at PHL: 87 minutes.
  • BA66: PHL 2026-12-16 18:35:00 → LHR 2026-12-17 06:35:00.
• Alaska Airlines AS101: LHR 2026-12-21 14:45:00 → SEA 2026-12-21 17:00:00; nonstop; 615 minutes. Local airport times.

2026-12-16 → 2026-12-21 · Axel-exclusive $903.25

• Alaska Airlines AS460 / BA238: SEA 2026-12-16 21:20:00 → LHR 2026-12-17 19:00:00; 1 stop(s) via BOS; 820 minutes. Local airport times.
  • AS460: SEA 2026-12-16 21:20:00 → BOS 2026-12-17 05:40:00; layover at BOS: 110 minutes.
  • BA238: BOS 2026-12-17 07:30:00 → LHR 2026-12-17 19:00:00.
• Alaska Airlines AS101: LHR 2026-12-21 14:45:00 → SEA 2026-12-21 17:00:00; nonstop; 615 minutes. Local airport times.

2026-12-16 → 2026-12-21 · Axel-exclusive $903.25

• Alaska Airlines AS385 / BA92: SEA 2026-12-16 08:31:00 → LHR 2026-12-17 05:50:00; 1 stop(s) via YYZ; 799 minutes. Local airport times.
  • AS385: SEA 2026-12-16 08:31:00 → YYZ 2026-12-16 16:05:00; layover at YYZ: 95 minutes.
  • BA92: YYZ 2026-12-16 17:40:00 → LHR 2026-12-17 05:50:00.
• Alaska Airlines AS101: LHR 2026-12-21 14:45:00 → SEA 2026-12-21 17:00:00; nonstop; 615 minutes. Local airport times.

Travelers: prices on this page are totals for 1 adult. For a different party, open this trip for 2 adults · 3 adults · 4 adults · 2 adults + 1 child · 2 adults + 2 children; each link opens AI flight search for these dates and those travelers, and the customer link to share comes from those results.

Explore this route

• All dates for this route
• Dec 15, 2026 · Return options
• Dec 17, 2026 · Return options
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