Boston To Seattle Flights — from €192
Compare cheap flights from Boston 🇺🇸 to Seattle 🇺🇸. Real prices, daily refreshed from Aviasales.
Cheapest month: 2026-06 at €192. Highest: €346. Tap a bar to jump to that month's fares ↓
Fares stay close to the average year-round on this route - September is the priciest month at EUR346, June the cheapest at EUR192 (yearly average EUR291).
Live cached prices from Aviasales. Pick a month, compare, book in one click.
Other ways travelers describe this route — we cover all of them on this page:
🏨 Search Hotels in Seattle — Compare 100+ booking sites
🚗 Rent a Car in Seattle — 800+ rental brands worldwide
🚙 Local Car Rental — Owner-operated fleets
🎧 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 2026-04-20 · Real-time travel data · Affiliate disclosure: this page contains affiliate links — we earn a commission if you book.
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Primary sources over aggregators. Prices from airline/rail/hotel APIs; seasonality from tourism boards; safety stats from national archives where possible.