$293 Find Cheap Flights from Seattle to London Heathrow Airport - Compare and Save

If you are having an early morning flight at Seattle Tacoma international airport and want to spend the night at the airport, there are armrest seats and benches. You can also bring a sleeping bag and heavy clothes to lay on one of the floors with carpets. Passengers can use the meditation room, which provides a peaceful and quiet place. We recommend passengers carry noise-canceling headphones and earplugs to avoid loud noises from the busy airport. Passengers willing to spend extra money can spend the night at the nearby hotels. Nearby hotels offering free shuttle services to and from the airport include Crowne Plaza Seattle Airport, Radisson Hotel Seattle Airport and La Quinta Inn & Suites Seattle SeaTac airport.

Passengers who want to leave their vehicle at the airport can reserve a parking lot by booking online before to avoid inconveniences. Seattle Tacoma international airport offers long-term and short-term parking services. The long-term parking is located on the fourth floor of the parking garage. There are also self-service kiosks outside gates B, C, D, N and S, where passengers can download their favorite movies for their trip.

If you arrive early at Seattle Tacoma international airport, enjoy the services offered at the airport. Loosen your stiff muscles at the massage bars near gate A5 on the airside of level 5. Passengers who want to freshen up can take advantage of Delta airlines sky club.

Traveling can sometimes be cumbersome, and passengers may want to relax or take a nap after arrival. Aerotol London Heathrow airport, located inside LHR airport, offers guest rooms. Passengers can relax and finish work upon arrival at the airport. Plaza Premium Lounge & No. 1 Heathrow is a hotel inside the airport with private napping rooms where passengers can relax. There are also nearby hotels where passengers can relax and have their meals.

Among airlines operating Seattle to London Heathrow Airport flights:

• Alaska Airlines: offers free seat selection
• British Airways: offers extra legroom
• Virgin Atlantic: offers extra legroom; offers free seat selection
• Delta: offers extra legroom; offers free seat selection
• Air France: offers extra legroom; offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

4 airlines operate flights between Seattle and London Heathrow Airport. The airlines offering nonstop flights on this route include:

• British Airways
• Alaska Airlines
• Delta
• Virgin Atlantic

Flights from Seattle to London Heathrow Airport usually depart from Seattle/Tacoma Intl (SEA) and arrive at London Heathrow (LHR).

Here are some options for this route, based on selected ticket types and cabin classes:

• Alaska Airlines: a cabin bag and a checked bag in Economy Class
• British Airways: a cabin bag and a checked bag in Economy Class
• Virgin Atlantic: a cabin bag and a checked bag in Economy Class

Bag allowance can vary by ticket type, cabin class, route and airline, so travelers should check the fare details before booking.

Four cabin classes are available on flights from Seattle to London Heathrow Airport:

• Economy Class
• Premium Economy Class
• Business Class
• First Class

Prices vary by airline.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $594 round-trip via Dallas/Fort Worth (DFW), compared to $906 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $29–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

The Boeing 787-10 Dreamliner family is used most often on this route, operated mainly by British Airways and Finnair. Other aircraft seen on the route include Airbus A330-900neo variants.

One-stop flights from Seattle to London Heathrow Airport most commonly connect through:

• Reykjavik Keflavik Intl (KEF) - 71% of one-stop connections
• Dublin (DUB) - 13% of one-stop connections
• Kastrup Copenhagen (CPH) - 6% of one-stop connections
• Vancouver Intl (YVR) - 3% of one-stop connections

Reykjavik Keflavik Intl (KEF) handles the largest share of one-stop connections on this route.

Yes. Being flexible with your travel dates can save you up to 13% on the Seattle to London Heathrow Airport route. Tuesday is the cheapest departure day at $813 round-trip on average, while Friday is the most expensive at $930, a difference of $117. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

A flight is considered delayed when it departs 15 minutes or more after its scheduled time. This is the standard used by the US Department of Transportation and most airline industry reporting. On the Seattle to London Heathrow Airport route, 14% of flights were delayed in the past 3 months, with delays averaging 2 hours 15 minutes.

Evening is the busiest departure period on Seattle to London Heathrow Airport flights, with 50% of flights leaving in that window. Afternoon departures account for 25%, night flights for 25%, and morning flights for 0%.

Some of the most popular sights in London Heathrow Airport are Paddington Station, Central London and London Victoria Station. These are among the most viewed places in London Heathrow Airport on KAYAK.

These are the earliest and latest flight times available from Seattle to London Heathrow Airport:

• Earliest: departs at 1:30 pm and lands at 11:03 pm
• Latest: departs at 9:50 pm and lands at 7:23 am.

The flight takes about 9h 33m.

Last-minute fares on this route - booked within 2 weeks of departure - run 18% above the route average of $871. Book 10 weeks before departure for the lowest fares.

A nonstop flight from Seattle to London Heathrow Airport takes 9h 33m, covering 4,783 miles.

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

One-way fares from Seattle to London Heathrow Airport are currently lower than usual. Average one-way flight prices are about $307, which is 42% below the typical average for this route.

Virgin Atlantic is slightly above the route average for timely arrivals, while Delta has a lower on-time arrival rate. On-time arrival rates on Seattle to London Heathrow Airport flights are:

• Virgin Atlantic: 96% on time
• Delta: 88% on time
• British Airways: 81% on time

Overall, flights on this route are on time 86% of the time on average.

Afternoon flights have the fewest delays on this route. Delays tend to pile up throughout the day as one late flight pushes the next, so earlier departures are usually more reliable.

Flying via Amsterdam Schiphol (AMS) gives the shortest average 1-stop total travel time at 12h 54m, compared with 13h 07m via Dublin (DUB) and 13h 37m via Denver Intl (DEN).

London Heathrow Airport is 8 hours ahead of Seattle (British Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

London Heathrow Airport (LHR) hosts 5 major car rental companies, with daily rates starting from around $7 for economy cars. Top options include:
· GREEN MOTION
· DRIVALIA
· Europcar
· Alamo
· Hertz

Round-trip flights from Seattle to London Heathrow Airport range from $691 to $1,098, with an average of $871 over the past 12 months. Anything below $691 counts as a good deal.

Four airlines offer in-flight Wi-Fi on Seattle to London Heathrow Airport flights:

• • Virgin Atlantic
• • Delta
• • Air France
• • KLM