Seattle To London Flights — from €558
Compare cheap flights from Seattle 🇺🇸 to London 🇬🇧. Real prices, daily refreshed from Aviasales.
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| Currency | GBP (£) |
| Language | English |
| Power plug | Type G |
| Tipping | 10-15% |
| Emergency | 999 |
Other ways travelers describe this route — we cover all of them on this page:
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🛡️ Travel Insurance from $4/day
📱 Get an eSIM (code FALLY20)
✈️ Flight Delayed? Claim up to €600
Seattle → Barcelona Seattle → Madrid Seattle → Malaga Seattle → Valencia Seattle → Seville Seattle → Ibiza Seattle → Mallorca Seattle → Tenerife Seattle → Gran Canaria Seattle → Lanzarote Seattle → Bilbao Seattle → Granada Seattle → Lisbon Seattle → Porto Seattle → Faro Seattle → Madeira Seattle → Rome Seattle → Milan Seattle → Venice Seattle → Florence Seattle → Naples Seattle → Palermo Seattle → Catania Seattle → Bologna Seattle → Bari Seattle → Verona Seattle → Pisa Seattle → Sardinia Seattle → Paris Seattle → Nice
Paris → London Amsterdam → London Brussels → London Frankfurt → London Munich → London Berlin → London Hamburg → London Zurich → London Geneva → London Vienna → London Dublin → London Madrid → London Barcelona → London Lisbon → London Porto → London Rome → London Milan → London Naples → London Athens → London Copenhagen → London Stockholm → London Oslo → London Helsinki → London Reykjavik → London Warsaw → London Krakow → London Prague → London Budapest → London Bucharest → London Sofia → London
Updated 2026-04-14 · Real-time travel data · Affiliate disclosure: this page contains affiliate links — we earn a commission if you book.
The Seattle to London flight takes approximately 7–10 hours nonstop, 9–14 hours via connections. Total journey time including check-in and airport transfers adds 2–3 hours. Filter search results by total journey time, not just fare, to find the most efficient routing.
January, february, and november typically offer the lowest fares, often 25–45% below peak-season prices. Shoulder season — April through May and September through October — balances value with excellent travel conditions. Avoid school holiday windows, when demand drives fares sharply higher.
Book 6–8 weeks ahead for the best price and seat availability. Fares typically rise sharply inside 14 days of departure. Searching on Tuesday or Wednesday mornings returns 10–15% lower fares than weekend searches on average.
Direct nonstop service may be limited on this route. Most itineraries connect through a major hub. Check current airline schedules as nonstop routes are added and removed seasonally.
Set a fare alert for the route and search ±3 days around your target travel dates. Frankfurt, Amsterdam, and Paris CDG provide the most reliable connections for this route. Self-connecting through a separate booking can beat bundled itinerary prices by 20–30%, though this carries risk if your first segment is delayed.