Cheap flights from Seattle to London Heathrow Airport from £194
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
The best prices from Seattle/Tacoma Intl to London Heathrow are usually found in February or January, booked 62 days in advance, depart on a Wednesday or Thursday and return on a Wednesday
Cheap flight deals from Seattle to Heathrow
Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 27 April 2024.
Popular in | June |
|---|---|
Cheapest in | February |
Average price | £622 |
Round-trip from | £71 |
What is the cheapest day to fly round-trip from Seattle to London Heathrow Airport?
Departing on a Tuesday is a good option for securing a great price. You can expect to save up to 32% when planning your travel around this day of the week.
How far in advance should I book a flight from Seattle to London Heathrow Airport?
Travelers have found it’s best to book a flight 59 days in advance to save up to 39% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 59 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Seattle to London Heathrow Airport 1-2 weeks in advance for as low as £693, or £915 for flights within the next 24 hours.
What is the cheapest month to fly from Seattle to London Heathrow Airport?
Due to multiple factors, expect to potentially pay more when booking in June. For low rates, January can be a great choice for travel to London Heathrow Airport. Flights to London Heathrow Airport from Seattle in January are about £688 on average during January, but can be found for as low as £370.
When is the cheapest time to fly from Seattle to London Heathrow Airport (SEA - LHR)?
Unlike at midday, when flights are generally more expensive, you can save up to 19% on flights from Seattle to London Heathrow Airport by exploring options for tickets in the morning.
Cheap Icelandair flights from Seattle to Heathrow
Explore cheap flight options specifically provided by Icelandair for the route between Seattle and Heathrow. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 925,673 searches. Data last updated 27 April 2024.
Consider these cheap Icelandair flights we've found departing from Seattle to London. It's recommended that users confirm their flight details before booking.
Icelandair is one of the most popular airlines used for those travelling from Seattle to London Heathrow Airport. Flights from Icelandair travelling this route typically cost £902.95 RT. This price is typically 52% more expensive than other airlines that offer Seattle to London Heathrow Airport flights. When booking this route, the cheapest RT price found was £638. The most popular departure airport in Seattle when flying to London Heathrow Airport is Seattle/Tacoma Intl Airport. The most popular airport to fly into when visiting London Heathrow Airport is London Heathrow Airport. When flying from Seattle to London Heathrow Airport, Icelandair flights are 5% more popular than any other airline flying that same route.
Cheap KLM flights from Seattle to Heathrow
Explore cheap flight options specifically provided by KLM for the route between Seattle and Heathrow. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 925,673 searches. Data last updated 27 April 2024.
Have a look at some of the cheapest available KLM flights departing from Seattle and landing in London. Deals are refreshing constantly so come back soon for more options.
One of the most popular airlines travelling from Seattle to London Heathrow Airport is KLM. Flights on this route from KLM typically cost £886.96 RT, a price that is 59% cheaper than the average Seattle to London Heathrow Airport flight. The cheapest flight found was £674 RT. The most popular departure airport in Seattle when flying to London Heathrow Airport is Seattle/Tacoma Intl Airport. The most popular airport to fly into when visiting London Heathrow Airport is London Heathrow Airport. When flying from Seattle to London Heathrow Airport, KLM flights are 5% more popular than any other airline flying that same route.
Cheap Seattle to Heathrow flights in April & May 2024
Find cheap flight options from Seattle to Heathrow specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 925,673 searches. Prices were last updated on 27 April 2024.
The lowest fares we've come across on flights travelling from Seattle to London in April and May 2024. Check back in a little while for more flight options.
Seattle to Heathrow 2024 flight deals
Discover exclusive flight deals for travel between Seattle and Heathrow in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 925,673 searches. Data last updated 27 April 2024.
The lowest fares we've come across on flights travelling from Seattle to London in April and May 2024. Check back in a little while for more flight options.
Direct flights to Heathrow from Seattle
Discover direct flight options from Seattle to Heathrow. Find direct flights with no stopovers, providing a convenient travel experience. Explore direct flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 925,673 searches. Data last updated 27 April 2024.
To help reduce your travel time, choose from one of these non-stop flights from Seattle to London. Those looking to potentially save on 1 or 2-stop flights from Seattle to London should utilise the search form at the top of the page.
Seattle to Heathrow flights leaving soon
Find last-minute flight options from Seattle to Heathrow for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 925,673 searches. Data last updated 27 April 2024.
Book one of these great deals on flights from Seattle to London. Users should double check the flight they book to ensure it matches the day, time, and destination they're looking for.
One-way flights to Heathrow from Seattle
Search for one-way flight options from Seattle to Heathrow. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 925,673 searches. Data last updated 27 April 2024.
Users in need of a one-way flight from Seattle to London can choose from these deals. Users can also find round-trip Seattle to London flights by using the search form above.
Find flights from Seattle to Heathrow within your budget
Customise your flight search to find flights from Seattle to Heathrow that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 925,673 searches. Data last updated 27 April 2024.
Fly from
Fly to
Budget
£474 - £524
Route
Depart
Return
Price
Seattle/Tacoma IntlLondon Heathrow
SEA - LHR
SEALHR
Seattle/Tacoma Intl
Sun 22/9
1 stop33h 00m
London Heathrow
Mon 7/10
1 stop28h 30m
Seattle/Tacoma IntlLondon Heathrow
SEA - LHR
SEALHR
Seattle/Tacoma Intl
Tue 1/10
1 stop14h 50m
London Heathrow
Thu 24/10
2 stops17h 46m
Seattle/Tacoma IntlLondon Heathrow
SEA - LHR
SEALHR
Seattle/Tacoma Intl
Tue 8/10
1 stop14h 50m
London Heathrow
Wed 16/10
2 stops19h 30m
Seattle/Tacoma IntlLondon Heathrow
SEA - LHR
SEALHR
Seattle/Tacoma Intl
Tue 1/10
2 stops17h 10m
London Heathrow
Fri 25/10
1 stop15h 59m
Seattle/Tacoma IntlLondon Heathrow
SEA - LHR
SEALHR
Seattle/Tacoma Intl
Sat 5/10
1 stop14h 27m
London Heathrow
Tue 15/10
1 stop17h 34m
Seattle/Tacoma IntlLondon Heathrow
SEA - LHR
SEALHR
Seattle/Tacoma Intl
Tue 1/10
Nonstop9h 20m
London Heathrow
Thu 24/10
1 stop16h 50m
Seattle/Tacoma IntlLondon Heathrow
SEA - LHR
SEALHR
Seattle/Tacoma Intl
Wed 25/9
Nonstop9h 20m
London Heathrow
Wed 2/10
Nonstop9h 55m
Seattle/Tacoma IntlLondon Heathrow
SEA - LHR
SEALHR
Seattle/Tacoma Intl
Tue 1/10
Nonstop9h 40m
London Heathrow
Wed 30/10
Nonstop10h 25m
Seattle/Tacoma IntlLondon Heathrow
SEA - LHR
SEALHR
Seattle/Tacoma Intl
Mon 30/9
2 stops19h 10m
London Heathrow
Mon 7/10
2 stops30h 21m
When is the best time to book a flight from Seattle to London Heathrow Airport?
Use this chart to determine the optimal time to book a return flight from Seattle to Heathrow. Price data was last updated on 28 January 2024.
The price you pay for your flight from Seattle to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 62 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
When is the cheapest time to fly from Seattle to London Heathrow Airport?
Use this chart to determine the cheapest time to fly return from Seattle to Heathrow. Price data was last updated on 21 April 2024.
Average price of flights to Heathrow by month
Plan your trip from Seattle to Heathrow by taking into account the cheapest months to travel. The average price of a one-way flight from Seattle to Heathrow is currently £244 while a return flight costs £512. Price data was last updated on 21 April 2024.
Currently, January is the cheapest month in which you can book a flight from Seattle to London Heathrow Airport (average of £111). Flying from Seattle to London Heathrow Airport in June is currently the most expensive (average of £171). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
January
£89
February
£100
March
£95
April
£100
May
£110
June
£137
July
£137
August
£116
September
£110
October
£127
November
£92
December
£97
Temperature and rainfall in Heathrow by month
Plan your trip to Heathrow by taking into account the average temperature and rainfall totals by month.
LON Temperature | 4 - 17 °C |
|---|
Reviews of airlines servicing Heathrow
Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated 27 April 2024.
Read reviews from past customers who have flown Icelandair, KLM and British Airways from Seattle to London. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Comfort
Crew
Food
Boarding
Entertainment
Overall
Reviews
Terrible flight crew that skipped our row for service multiple times.
Comfort
Crew
Food
Boarding
Entertainment
Overall
Reviews
Terrible flight crew that skipped our row for service multiple times.
Comfort
Crew
Food
Boarding
Entertainment
Overall
Reviews
Terrible flight crew that skipped our row for service multiple times.
Comfort
Crew
Food
Boarding
Entertainment
Overall
Reviews
Terrible flight crew that skipped our row for service multiple times.
Comfort
Crew
Food
Boarding
Entertainment
Overall
Reviews
Terrible flight crew that skipped our row for service multiple times.
Comfort
Crew
Food
Boarding
Entertainment
Overall
Reviews
Terrible flight crew that skipped our row for service multiple times.
Related info for your journey
Find useful and relevant information for your journey from Seattle to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Seattle to HeathrowSee prices for flight routes from nearby airports that may be better suited for you.
See prices for flight routes from nearby airports that may be better suited for you.
Top 5 airlines flying from Seattle to Heathrow
Discover the top 5 airlines that operate flights from Seattle to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 925,673 searches. Data last updated 27 April 2024.
Search flights from Seattle to Heathrow by cabin class
Find flights from Seattle to Heathrow, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Hourly flight availability from Seattle to Heathrow
Find hourly flight availability from Seattle to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 27 April 2024.
| 0%of flight departures | Early morningMidnight to 6 am |
|---|---|
| 0%of flight departures | Morning6 am to noon |
| 40%of flight departures | AfternoonNoon to 6 pm |
| 60%of flight departures | Evening6 pm to midnight |
Weekly flight availability from Seattle to Heathrow
Explore weekly flight availability from Seattle to Heathrow. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 27 April 2024.
| Monday | 20daily flights |
|---|---|
| Tuesday | 15daily flights |
| Wednesday | 20daily flights |
| Thursday | 20daily flights |
| Friday | 20daily flights |
| Saturday | 20daily flights |
| Sunday | 20daily flights |
Book a flight to one of these trending destinations
User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations
Fly with Cheapflights
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How does Cheapflights help users find flights from Seattle to Heathrow?
Cheapflights helps you search for flights from Seattle to Heathrow via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.
Why should you use Cheapflights to find cheap flight tickets from Seattle to Heathrow?
Cheapflights helps you find that perfect flight to Heathrow from Seattle by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!
Can Cheapflights find flights from Seattle to Heathrow with no change fees?
Yes! Cheapflights helps users easily find flights from Seattle to Heathrow with no change fees.
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Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!