Boston To Seattle Flights — from €141
Compare cheap flights from Boston 🇺🇸 to Seattle 🇺🇸. Real prices, daily refreshed from Aviasales.
Live price data temporarily unavailable for this route. Search current fares directly →
Other ways travelers describe this route — we cover all of them on this page:
🏨 Search Hotels in Seattle — Compare 100+ booking sites
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🎧 Self-Guided Audio Tours of Seattle
🎫 Skip-the-Line Tickets
🚕 Airport Transfer
🛡️ Travel Insurance from $4/day
📱 Get an eSIM (code FALLY20)
✈️ Flight Delayed? Claim up to €600
Boston → Barcelona Boston → Madrid Boston → Malaga Boston → Valencia Boston → Seville Boston → Ibiza Boston → Mallorca Boston → Tenerife Boston → Gran Canaria Boston → Lanzarote Boston → Bilbao Boston → Granada Boston → Lisbon Boston → Porto Boston → Faro Boston → Madeira Boston → Rome Boston → Milan Boston → Venice Boston → Florence Boston → Naples Boston → Palermo Boston → Catania Boston → Bologna Boston → Bari Boston → Verona Boston → Pisa Boston → Sardinia Boston → Paris Boston → Nice
London → Seattle Paris → Seattle Amsterdam → Seattle Brussels → Seattle Frankfurt → Seattle Munich → Seattle Berlin → Seattle Hamburg → Seattle Zurich → Seattle Geneva → Seattle Vienna → Seattle Dublin → Seattle Madrid → Seattle Barcelona → Seattle Lisbon → Seattle Porto → Seattle Rome → Seattle Milan → Seattle Naples → Seattle Athens → Seattle Copenhagen → Seattle Stockholm → Seattle Oslo → Seattle Helsinki → Seattle Reykjavik → Seattle Warsaw → Seattle Krakow → Seattle Prague → Seattle Budapest → Seattle Bucharest → Seattle
Updated 2026-04-14 · Real-time travel data · Affiliate disclosure: this page contains affiliate links — we earn a commission if you book.
The Boston to Seattle flight takes approximately 1–5 hours. 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 15–25% 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 3–5 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.
Yes, nonstop options operate on this route — frequency varies by season.
Set a fare alert for the route and search ±3 days around your target travel dates. Compare fares from nearby airports — a short drive can unlock significantly lower base fares. Self-connecting through a separate booking can beat bundled itinerary prices by 20–30%, though this carries risk if your first segment is delayed.