Flights
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Sign up for Crystal Travel emails below to reveal a promo code you can use today.Planning a trip from London Heathrow (LHR) to Seattle (SEA)? Get ready for a long-haul journey that lands you in the heart of the Pacific Northwest. Seattle—famous for its Space Needle, tech hubs, and stunning natural beauty—is the ideal gateway to Washington State's vibrant cities and wild outdoor escapes. Thanks to frequent non-stop services from Heathrow, travelling to the Emerald City is easier and more efficient than ever. Whether you’re looking for cheap flights to Seattle, direct flights from London to Seattle, or last-minute London to Seattle flight deals, we’ve got you covered with everything you need to plan the perfect transatlantic escape.
Major airlines such as British Airways, Virgin Atlantic, and American Airlines operate direct flights from London Heathrow to Seattle, with most non-stop services lasting around 9 - 10 hours. Travellers can choose between Economy, Premium Economy, and Business Class, enjoying exceptional onboard experiences that include complimentary meals, beverages, and entertainment. Keep an eye on exclusive promotions and seasonal fare discounts for the best London Heathrow to Seattle flight deals available year-round.
Direct flights from Heathrow to Seattle typically span just under 10 hours, covering approximately 4,800 miles across the Atlantic and North America. Economy Class offers ergonomic seating and complimentary inflight meals, while Premium and Business Class travellers enjoy enhanced legroom, lie-flat seats, lounge access, and priority boarding. Onboard Wi-Fi and seat-back entertainment systems help make this long-haul journey more comfortable and enjoyable.
Flexible travel dates are key to securing cheap flights to Seattle. Using a date-range calendar helps identify the lowest fare windows—mid-week departures on Tuesdays or Wednesdays often present the best value. When booked 3–4 months in advance, particularly during off-peak months like February, March, and November. Sign up for fare alerts and be the first to know when prices for flights to Seattle drop.
To secure the most affordable flights from London Heathrow to Seattle, aim to book three to four months in advance. Early-bird deals, flash sales, and mid-week discounts offer great value without compromising comfort. Off-peak departures—early morning or red-eye flights—often unlock further savings. With our real-time fare tracking, you’ll always know the best moment to lock in your London to Seattle flight for the lowest price.
Complete your Seattle adventure with seamless extras. Pre-book car hire at Seattle-Tacoma International Airport (SEA) to explore nearby destinations like Mount Rainier, Tacoma, or Portland. Browse handpicked accommodation—from trendy city-center hotels to cosy waterfront stays—and add travel insurance for peace of mind. For longer holidays, extend your trip with Amtrak train rides to Vancouver or San Francisco. Check out our local guides for must-see attractions, coffee culture, and insider tips on Seattle’s buzzing food scene.
Return flights from London Heathrow to Seattle typically start from about £729*, though prices may change depending on booking time, seasonal demand, and flight availability. To secure the best deals, it's recommended to book several months in advance and avoid peak travel periods like summer holidays and festive seasons.
The most affordable months to fly from London to Seattle are February, March, and November, when travel demand is lower and promotional fares are easier to find. These shoulder-season months avoid school holidays and major US events, helping to bring flight prices down considerably.
The ideal booking window for the lowest LHR–SEA fares is 12 to 16 weeks before travel. Booking within this timeframe gives access to early promotional rates and wider seat choices. Prices often rise within 2–3 weeks of departure, especially for direct flights, so booking early is the best strategy for cheap flights to Seattle.
Yes, several airlines offer non-stop flights between Heathrow and Seattle, including British Airways, Finnair, and American Airlines. These direct routes provide the fastest and most convenient option for transatlantic travel to the US West Coast.
Direct flights from LHR to SEA typically take around 9 - 10 hours, depending on wind patterns and air traffic. The route crosses the North Atlantic and Canadian airspace before descending into Washington State.
The main carriers operating direct flights from London Heathrow to Seattle include British Airways, Finnair, and Air Lingus, and many otherairlines provide year-round service with multiple weekly departures.
To find cheap flights to Seattle from London, search using flexible dates and avoid weekend departures. Mid-week flights—especially on Tuesdays and Wednesdays—often feature the best fares. Book in advance, use fare comparison tools, and consider red-eye or early-morning flights for added savings. Setting price alerts is another great way to catch limited-time discounts.
Enjoy low fares, live fare tracking, and a smooth booking experience tailored for every traveller, from solo explorers to family holidaymakers.
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