Cheap Flights from Seattle (SEA) to London (LHR)

You can find one-way and return flights from SEA to LHR with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when SEA to LHR ticket fares go up or down.

If you're looking for the cheapest time to fly from Seattle - Tacoma Intl. (SEA) to London Heathrow (LHR), October is typically your best bet! You can expect average return fares around AU$957. October often sees lower prices as the peak summer travel season has ended, and the holiday rush hasn't quite begun, leading to less demand. Other budget-friendly months to consider for this route include September and November.

There are 3 airlines offering direct flights from Seattle - Tacoma Intl. (SEA) to London (LHR-Heathrow). Here are the top carriers:
* British Airways operates 14 direct flights from Seattle - Tacoma Intl. to London (LHR-Heathrow) every week.
* Delta operates 7 direct flights from Seattle - Tacoma Intl. to London (LHR-Heathrow) every week.
* Virgin Atlantic operates 7 direct flights from Seattle - Tacoma Intl. to London (LHR-Heathrow) every week.

Delta is one of the cheapest airlines offering nonstop return flights from Seattle - Tacoma Intl. (SEA) to Heathrow (LHR), with tickets starting from around AU$1100 for flights that can be booked for departure within the next year. Alaska Airlines is one of the cheapest airlines offering connecting return flights from Seattle - Tacoma Intl. (SEA) to Heathrow (LHR), with tickets starting from around AU$1390. These prices are per adult for economy/coach class. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.

To find a cheap flight from Seattle, WA (SEA) to London (LHR), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.

The best airline to fly with from Seattle, WA (SEA-Seattle - Tacoma Intl.) to London (LHR-Heathrow) will differ from traveler to traveler. If you like to fly early, Alaska Airlines offers early morning flights. If price is the most important factor, Virgin Atlantic typically offers the lowest fares. Delta offers the most daily flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to London (LHR-Heathrow), which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.

The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.

You'll find approximately 4 nonstop flights per day from Seattle - Tacoma Intl. (SEA) to London Heathrow (LHR). For even more choices, look at flights that include layovers. There are around 161 connecting flights per day. Some common connection points include O'Hare Intl. (ORD), Logan Intl. (BOS), and John F. Kennedy Intl. (JFK).

The earliest flight from Seattle - Tacoma Intl. (SEA) to Heathrow (LHR) typically departs around 12:05 AM local time, operated by American Airlines. This is a seasonal service, active only in February. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.

You'll typically find the most flights from Seattle - Tacoma Intl. (SEA) to London Heathrow (LHR) on a Friday, with around 129 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include Delta, American Airlines, and Alaska Airlines. Flight options are notably more on Fridays compared to other days of the week, offering you greater flexibility.

The most popular departure times for flights from Seattle - Tacoma Intl. (SEA) to Heathrow (LHR) are in the evening, from 6pm to 9pm. Many major carriers, including Virgin Atlantic, Aer Lingus and British Airways, offer flights during this window. Many travelers prefer this because it allows you to have a full day in Seattle before your flight and arrive in London in the morning, ready to start your day.

When flying from Seattle - Tacoma Intl. (SEA) to London Heathrow (LHR), you have a few options. A nonstop flight typically takes around 9 hours 48 minutes, covering a distance of approximately 7703 kilometres. If you opt for a one-stop flight, your travel time will be longer, usually around 14 hours 30 minutes. Flights with two or more stops will take even longer, with a typical duration of about 16 hours 48 minutes. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic, so it's always a good idea to allow for some extra time when planning your journey.

Yes, you can fly business class or first class between SEA and LHR. Airlines that offer business class service on this route include:

* Aer Lingus
* Lufthansa
* Air France
* British Airways
* Alaska Airlines
* Singapore Airlines
* Air Canada
* Korean Air
* Skywest Air
* Turkish Airlines
* SAS
* Virgin Atlantic
* Delta
* Icelandair
* Horizon Air
* United
* Finnair
* American Airlines
* Edelweiss Air
* Condor

First class cabins are available on British Airways, Alaska Airlines, United, and American Airlines.

It's easy to earn miles on a Seattle, WA (SEA) to London (LHR) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.

*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.

If you're planning to travel to London from Seattle - Tacoma Intl. (SEA), you can fly directly into Heathrow (LHR). Some flights may connect through major hubs like Salt Lake City Intl. (SLC), Vancouver Intl. (YVR), or O'Hare Intl. (ORD) before reaching London. Compare routes and airports on Expedia to find the best flight options for your travel plans.

Typically, booking a last minute flight from Seattle, WA (SEA) to London (LHR) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.

Securing a Seattle, WA (SEA) to London (LHR) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.

If you booked your Seattle, WA (SEA) to London (LHR) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.