Flights
London Heathrow to Seattle
Find the best deals from London Heathrow Airport (LHR) to Seattle-Tacoma International Airport (SEA). Compare 2+ airlines and book your next trip with ease.
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Quick Facts
Essential details for your London Heathrow to Seattle trip.
Route Overview
Everything you need to know about flying from London Heathrow to Seattle.
Direct Flight Time
9h 40m
Non-stop service
Economy From
£440
One way, off-peak
Business From
£1320
One way, off-peak
The London Heathrow to Seattle route is one of the busiest UK–India corridors, operated year-round by leading carriers including British Airways, Delta. Flights depart from London Heathrow Airport (LHR) and land at Seattle-Tacoma International Airport (SEA) in approximately 9h 40m on a direct service.
BharatFare is a UK-specialist travel agency focused exclusively on UK to India routes. We offer exclusive fares not always available on mainstream booking platforms, along with dedicated WhatsApp support from our team of India travel experts — available 7 days a week. Whether you are travelling economy, premium economy, business class, or first class, BharatFare compares every available option on the London Heathrow–Seattle route so you get the best combination of price, comfort, and flexibility.
Best time to book London Heathrow to Seattle flights: Off-peak periods — January through March and September to October — offer the lowest fares on this route. Christmas, Diwali (October/November), and UK summer school holidays (July–August) are peak seasons where prices can increase significantly. We recommend booking at least 6–10 weeks in advance for the best available fares.
Travelling to Seattle from London Heathrow? Our UK-based team can assist with group bookings, last-minute fares, flexible ticket options, and travel insurance. All bookings come with our price-match guarantee — if you find a cheaper fare, we will beat it. Contact us via WhatsApp for instant, personalised quotes.
Flights from London Heathrow to Seattle (LHR–SEA) are operated year-round with a direct flight time of approximately 9h 40m. The London Heathrow to Seattle flight departs from London Heathrow Airport and arrives at Seattle-Tacoma International Airport. For travellers looking for cheap London Heathrow to Seattle flights, the lowest-priced economy fares typically start around £440 one way off-peak — though prices on this route vary significantly by season and booking window.
To book London Heathrow to Seattle flights at the best price, the ideal window is 8–12 weeks before departure for economy, and 3–6 months ahead for business class. BharatFare specialises in Seattle flights from London Heathrow and regularly offers exclusive fares below published online rates. Whether you are searching for the cheapest London Heathrow to Seattle economy seat or a premium business class experience from £1320, our UK-based team can find the right option for your budget and travel dates.
Direct Flights London Heathrow to Seattle
British Airways operates the primary direct service on the London Heathrow–Seattle route, with non-stop flights departing from London Heathrow Airport (LHR) and landing at Seattle-Tacoma International Airport (SEA) in approximately 9h 40m. Choosing a direct London Heathrow to Seattle flight avoids layover time and reduces overall journey fatigue — particularly valuable on long-haul routes. While direct fares carry a small premium over connecting services, many travellers find the time saving well worth the extra cost.
London Heathrow to Seattle Business Class
Business class on the London Heathrow–Seattle route is available with British Airways, Delta, with fares starting from approximately £1320 one way. Long-haul business class typically includes lie-flat beds, access to premium airport lounges, priority boarding, enhanced dining, and 2 × 23 kg checked baggage. For travellers making the journey regularly — especially the UK-India diaspora — business class offers a significantly more comfortable experience on this 9h 40m route. BharatFare specialises in securing exclusive business class fares on this corridor.
How to Find Cheap London Heathrow to Seattle Flights
Economy fares from London Heathrow to Seattle start from approximately £440 one way off-peak. To secure the cheapest London Heathrow to Seattle fares, book 8–12 weeks in advance and travel in January–February or September–October. Avoid Christmas, Diwali (October/November), and UK summer school holidays (July–August) when prices rise sharply. Use flexible dates where possible, and set fare alerts for your preferred route. BharatFare also offers exclusive fares and price-matching — a quick WhatsApp message to our team often uncovers deals not visible on public booking sites.
Best Time to Travel
Peak season for London Heathrow–Seattle is October to March when weather in India is most pleasant. July–August (monsoon season) sees heavy rainfall across much of India — avoid unless travelling to hill stations. Book 8–12 weeks ahead during off-peak for the best fares.
Airport Information
London Heathrow Airport (LHR) — Most India-bound services depart from Terminal 2 or Terminal 4. Arrive at least 3 hours before departure for international flights. Upon arrival at Seattle-Tacoma International Airport (SEA), visa-on-arrival and e-Visa counters are available before immigration.
Visa Requirements
Indian passport holders do not require a UK visa to transit. UK passport holders require an Indian e-Visa — apply online at indianvisaonline.gov.in at least 4 days before travel. Processing typically takes 3–5 business days.
Baggage Allowance
Most airlines on the London Heathrow–Seattle route allow 23 kg checked baggage in Economy and 2 × 23 kg in Business Class, plus a 7 kg cabin bag. British Airways offers some of the most generous baggage policies on this route. Always check your specific fare conditions before travel.
About Seattle, United States
Essential information for your London Heathrow to Seattle trip.
Seattle is the Pacific Northwest's jewel, a tech-savvy city surrounded by mountains, water, and evergreen forests. Pike Place Market, the Space Needle, and a world-leading coffee culture are just the beginning of what makes the Emerald City one of America's most liveable destinations.
Seattle is the birthplace of both Starbucks and Amazon, two companies that have fundamentally reshaped how the world shops and drinks coffee.
Timezone
GMT-8
Currency
US Dollar (USD)
Language
English
UK Visa
ESTA Required
Best Months
June to September
Peak Season
July to August
Climate
Oceanic — mild summers, cool wet winters, overcast much of the year
Top Attractions
- Space Needle
- Pike Place Market
- Chihuly Garden and Glass
- Museum of Pop Culture
Travel Tips for London Heathrow to Seattle
Pro advice to make your journey smoother and more comfortable.
Prepare for a Long-Haul Flight
Your flight from London Heathrow to Seattle is over 9 hours. Wear compression socks, stay hydrated, and move around the cabin every couple of hours to stay comfortable.
Beat Jet Lag
Adjust your sleep schedule 2–3 days before departure. Once on board, set your watch to Seattle time and try to sleep or stay awake accordingly.
Pack In-Flight Entertainment
Download films, podcasts, or audiobooks before you fly. Noise-cancelling headphones make a significant difference on long-haul routes.
ESTA Authorization Required
UK citizens need an approved ESTA (Electronic System for Travel Authorization) before flying to Seattle. Apply online at least 72 hours before departure — it costs $21 and is valid for two years.
US Customs and TSA
Allow extra time for immigration on arrival. Carry your hotel address and return flight details — CBP officers often ask for these at passport control.
Book Travel Insurance
Always purchase comprehensive travel insurance before flying from London Heathrow to Seattle. It covers cancellations, medical emergencies, and lost luggage — peace of mind for a few pounds.
Frequently Asked Questions
Everything you need to know about flying from London Heathrow to Seattle.
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