- Be in the knowGet alerts if flight prices drop or rise*
- Book smarterSave up to 30% on select hotels after you book a flight*
$408 Cheap British Airways flights Seattle (SEA) to London (LHR)
Prices were available within the past 7 days and start at $408 for one-way flights and $661 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.
Origin airport | Seattle - Tacoma Intl. |
Destination airport | Heathrow |
Airlines serving | Aer Lingus, Air Canada, Air France, Alaska Airlines, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, JetBlue Airways, KLM, Lufthansa, Swiss International Air Lines, Turkish Airlines, United, Virgin Atlantic, WestJet |
Roundtrip price | $531 |
Distance | 4786 mi |
Flights from Seattle (SEA) to London (LHR) with British Airways
❓ How much is a flight ticket from Seattle (SEA) to London (LHR) with British Airways?
✔️ Prices were available within the past 7 days and start at $408 for one-way flights and $661 for roundtrip, for the period specified. Prices and availability are subject to change. Additional terms apply.
❓ Which month is the cheapest flight ticket for Seattle (SEA) to London (LHR) with British Airways?
✔️ The airfares published on Expedia.com over the past 7 days saw the lowest prices for one-way departures in December and round-trip departures in December.
❓ How can I find cheap British Airways tickets from Seattle SEA to London LHR?
✔️ Use the interactive calendar available on Expedia to see the cheapest British Airways (Seattle SEA - London LHR) ticket prices during the weeks surrounding your travel dates. Compare flight prices for similar timeframes and adjust departure and return dates to get the cheapest fare possible. The lowest-priced days are highlighted in green.
While it’s impossible to guarantee when to find the lowest prices, our data currently suggests that December seems to be the cheapest month to take roundtrips and December seems to have the lowest one-way prices. Plane tickets for flight routes with one or more stops can sometimes be cheaper.
❓ When is the best time to buy flights from Seattle to London?
✔️ Three weeks out can be the best time to book flights with various airlines on diverse routes according to ARC & Expedia Group historical data. The data also suggests that if book on a Sunday, you could possibly save up to 20% on fares*.
❓ What is the cheapest day to fly from SEA to LHR?
✔️ ARC & Expedia Group historical data suggests that travelers can save on diverse routes when starting their journey on a Thursday for international flights and on a Friday for domestic flights*. The cheapest day of the week to fly changes based on seasonal demand and route popularity. We recommend using the ‘Show flexible dates’ feature at the top of your search.
❓ Can I change or cancel my British Airways flight from Seattle to London?
✔️ Airlines have different policies and fees for changes or cancellations. It’s important to review the ‘rules + restrictions’ section in your itinerary. We recommend filtering for ‘No change fees’ to see flexible plane tickets. Some airlines charge steep fees, while others are more flexible. Basic Economy or Light Fare tickets are generally non-refundable, but most airlines allow free cancellations or changes within 24 hours after booking. Find out more about changing or canceling your flight reservation by navigating to ‘My Trips’ and selecting ‘Change My Flight.’
*Data specialists from both ARC and Expedia Group analyzed ARC’s global flight data to distill actionable information to help people save money on travel. While it’s impossible to guarantee when to find the lowest prices, after examining the variables, we were able to observe trends.Best day of the week to book and travel recommendation is based on average round-trip ticket prices for January through early October, for both 2019 and 2020, sourced from ARC’s global airline sales database.
- Trending British Airways Flights
- Trending Routes
- Airlines Operating
- Nearby Airports
- Flights from Other Cities
- Expedia's Latest Trends
Most Popular British Airways Routes from Seattle
Most Popular British Airways Routes from London
- New York to Barcelona (JFK - BCN)
- New York to Tokyo (JFK - HND)
- New York to Mumbai (JFK - BOM)
- San Francisco to Delhi (SFO - DEL)
- New York to Tokyo (JFK - HND)
- San Francisco to London (SFO - LHR)
- Washington to London (IAD - LHR)
- Newark Liberty Intl. Airport to Paris (EWR - CDG)
- New York to Delhi (JFK - DEL)
- San Juan to Madrid (SJU - MAD)
Popular Domestic Routes in Heathrow
- New York to Delhi (JFK - DEL)
- San Francisco to London (SFO - LHR)
- San Francisco to Delhi (SFO - DEL)
- New York to Dubai (JFK - DXB)
- New York to London (JFK - LHR)
- Washington to London (IAD - LHR)
- New York to Barcelona (JFK - BCN)
- Chicago to London (ORD - LHR)
- New York to Mumbai (JFK - BOM)
- Boston to London (BOS - LHR)
Nearby Airports
- Boeing Field Airport (BFI)
- Seattle Paine Field Intl. Airport Airport (PAE)
- William R. Fairchild Intl. Airport (CLM)
- Lopez Island Airport (LPS)
- Friday Harbor Airport (FRD)
- Friday Harbor Sea Plane Base Airport (FBS)
- Bowerman Airport (HQM)
- Rosario Seaplane Base Airport (RSJ)
- Westsound Airport (WSX)
- Roche Harbor Airport (RCE)