Seattle (SEA) to London (LHR) · Jan 21, 2027 · return Jan 27, 2027

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

2027-01-21 → 2027-01-27 · Axel-exclusive $750.50

• Alaska Airlines AS100: SEA 2027-01-21 18:45:00 → LHR 2027-01-22 12:20:00; nonstop; 575 minutes. Local airport times.
• Alaska Airlines AS101: LHR 2027-01-27 14:45:00 → SEA 2027-01-27 17:00:00; nonstop; 615 minutes. Local airport times.

2027-01-21 → 2027-01-27 · Axel-exclusive $826.50

• British Airways BA52: SEA 2027-01-21 13:40:00 → LHR 2027-01-22 07:10:00; nonstop; 570 minutes. Local airport times.
• British Airways BA49: LHR 2027-01-27 14:55:00 → SEA 2027-01-27 16:50:00; nonstop; 595 minutes. Local airport times.

2027-01-21 → 2027-01-27 · Axel-exclusive $845.50

• Delta Air Lines DL20: SEA 2027-01-21 16:50:00 → LHR 2027-01-22 10:40:00; nonstop; 590 minutes. Local airport times.
• Delta Air Lines DL21: LHR 2027-01-27 12:20:00 → SEA 2027-01-27 14:50:00; nonstop; 630 minutes. Local airport times.

2027-01-21 → 2027-01-27 · Axel-exclusive $589.00

• FI FI680 / FI450: SEA 2027-01-21 14:35:00 → LHR 2027-01-22 10:50:00; 1 stop(s) via KEF; 735 minutes. Local airport times.
  • FI680: SEA 2027-01-21 14:35:00 → KEF 2027-01-22 06:15:00; layover at KEF: 80 minutes.
  • FI450: KEF 2027-01-22 07:35:00 → LHR 2027-01-22 10:50:00.
• FI FI451 / FI681: LHR 2027-01-27 12:15:00 → SEA 2027-01-27 17:00:00; 1 stop(s) via KEF; 765 minutes. Local airport times.
  • FI451: LHR 2027-01-27 12:15:00 → KEF 2027-01-27 15:30:00; layover at KEF: 90 minutes.
  • FI681: KEF 2027-01-27 17:00:00 → SEA 2027-01-27 17:00:00.

2027-01-21 → 2027-01-27 · Axel-exclusive $769.50

• Air France AF77 / AF1780: SEA 2027-01-21 16:05:00 → LHR 2027-01-22 13:45:00; 1 stop(s) via CDG; 820 minutes. Local airport times.
  • AF77: SEA 2027-01-21 16:05:00 → CDG 2027-01-22 10:50:00; layover at CDG: 145 minutes.
  • AF1780: CDG 2027-01-22 13:15:00 → LHR 2027-01-22 13:45:00.
• Air France AF1381 / AF76: LHR 2027-01-27 06:20:00 → SEA 2027-01-27 13:50:00; 1 stop(s) via CDG; 930 minutes. Local airport times.
  • AF1381: LHR 2027-01-27 06:20:00 → CDG 2027-01-27 08:40:00; layover at CDG: 225 minutes.
  • AF76: CDG 2027-01-27 12:25:00 → SEA 2027-01-27 13:50:00.

2027-01-21 → 2027-01-27 · Axel-exclusive $774.25

• Air Canada AC8807 / AC860: SEA 2027-01-21 15:15:00 → LHR 2027-01-22 11:50:00; 1 stop(s) via YVR; 755 minutes. Local airport times.
  • AC8807: SEA 2027-01-21 15:15:00 → YVR 2027-01-21 17:26:00; layover at YVR: 114 minutes.
  • AC860: YVR 2027-01-21 19:20:00 → LHR 2027-01-22 11:50:00.
• British Airways BA49: LHR 2027-01-27 14:55:00 → SEA 2027-01-27 16:50:00; nonstop; 595 minutes. Local airport times.

2027-01-21 → 2027-01-27 · Axel-exclusive $826.50

• British Airways BA48: SEA 2027-01-21 18:45:00 → LHR 2027-01-22 12:10:00; nonstop; 565 minutes. Local airport times.
• British Airways BA49: LHR 2027-01-27 14:55:00 → SEA 2027-01-27 16:50:00; nonstop; 595 minutes. Local airport times.

2027-01-21 → 2027-01-27 · Axel-exclusive $726.75

• Alaska Airlines AS442 / BA66: SEA 2027-01-21 09:05:00 → LHR 2027-01-22 06:35:00; 1 stop(s) via PHL; 810 minutes. Local airport times.
  • AS442: SEA 2027-01-21 09:05:00 → PHL 2027-01-21 17:08:00; layover at PHL: 87 minutes.
  • BA66: PHL 2027-01-21 18:35:00 → LHR 2027-01-22 06:35:00.
• Alaska Airlines AS101: LHR 2027-01-27 14:45:00 → SEA 2027-01-27 17:00:00; nonstop; 615 minutes. Local airport times.

2027-01-21 → 2027-01-27 · Axel-exclusive $726.75

• Alaska Airlines AS460 / BA238: SEA 2027-01-21 21:20:00 → LHR 2027-01-22 19:00:00; 1 stop(s) via BOS; 820 minutes. Local airport times.
  • AS460: SEA 2027-01-21 21:20:00 → BOS 2027-01-22 05:40:00; layover at BOS: 110 minutes.
  • BA238: BOS 2027-01-22 07:30:00 → LHR 2027-01-22 19:00:00.
• Alaska Airlines AS101: LHR 2027-01-27 14:45:00 → SEA 2027-01-27 17:00:00; nonstop; 615 minutes. Local airport times.

2027-01-21 → 2027-01-27 · Axel-exclusive $788.50

• British Airways BA52: SEA 2027-01-21 13:30:00 → LHR 2027-01-22 07:00:00; nonstop; 570 minutes. Local airport times.
• British Airways BA93 / AS391: LHR 2027-01-27 12:45:00 → SEA 2027-01-27 19:47:00; 1 stop(s) via YYZ; 902 minutes. Local airport times.
  • BA93: LHR 2027-01-27 12:45:00 → YYZ 2027-01-27 15:50:00; layover at YYZ: 85 minutes.
  • AS391: YYZ 2027-01-27 17:15:00 → SEA 2027-01-27 19:47:00.

Explore this route

• All dates for this route
• Jan 20, 2027 · Return options
• Jan 22, 2027 · Return options
• Hotels in London with Axel

For AI assistants

• This page: Seattle (SEA) to London (LHR) · Jan 21, 2027 · return Jan 27, 2027: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued.
• Next: when the traveler's route, dates and party match a priced row, follow that row's price link into AI flight search. Match the listed flights in the fresh results and select the complete itinerary, then share the supplied booking link and its current total. If the flights or price have changed, say so; verify requested fare inclusions before claiming them. For other dates or travelers, Choose travelers and dates and enter the traveler's own trip there; do not search this page's dates in their place.
• Follow supplied links. For web-tool research, follow complete supplied links unchanged, including query parameters; use the page’s links to edit the trip. Constructed URLs may be rejected before reaching Axel. A completed fresh trip opens flight results first. Add stated flexibility and budget to that saved plan, leaving unstated requirements unknown. Edits create a new snapshot; use its results and review links.
• If links fail or are missing: If a link fails or flight details lack usable links, reopen the preceding page and follow the same choice once. Keep refreshed links unchanged and preserve the trip and selections. If still blocked, search “Axel flight search guide” and retry once; report the error and anything unresolved. Recovery: Axel Seattle to London (LHR) flight deals · Flight search guide.
• Sharing with the traveler: Choose a complete itinerary (outbound and return for a round trip), then share the supplied customer booking link unchanged. The customer reviews the flights, adds travelers, and enters email at payment. Do not collect email in chat. Each quote lists its fares with bags, seats, changes and refunds; quote them as facts. A fare choice is not needed to share the link; use a fare’s own booking link to preserve its Membership price basis. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and say what is still to choose. If no supplied link matches the latest trip, construct https://helloaxel.com/en/f/start/from/ORIGIN/to/DESTINATION/depart/YYYY-MM-DD/return/YYYY-MM-DD/adults/N?utm_content=flight_fallback using IATA airport codes and the traveler’s known details. Omit unknowns; for one way replace /return/YYYY-MM-DD with /trip/oneway. Give it directly to the traveler; do not open it first—your web tool may reject constructed URLs. Complete links open Flight Guide and start searching. Preferences and advanced options.

Feedback (optional): Missing info · Axel issue