$415+ Cheap flights from the United Kingdom to Seattle (SEA)
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 8/27. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from United Kingdom to Seattle with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from United Kingdom to Seattle
Keep the following information in mind while searching for United Kingdom to Seattle flight deals. Data was last updated junio 12, 2025.
Round-trip from | $646 (Cheapflightsfares) |
|---|---|
One-way from | $415 (Kiwi.com) |
Popular in | August |
Cheapest in | January |
Average price | $757 |
Good round-trip deal | $668 or less |
Good one-way deal | $621 or less |
Find flight deals from United Kingdom to Seattle
Cheapest flights from United Kingdom to SeattleExplore the most affordable flight options available from United Kingdom to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 12, 2025.
Explore the most affordable flight options available from United Kingdom to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 12, 2025.
This Cheapflightsfares deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Bravofly deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This TravelUp deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Booking.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Delta deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Justfly.com deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This The Travel House deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Gotogate deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This SWISS deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This American Airlines deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Mytrip deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Air Canada deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Cheapflights Fare Finder
Customize your flight search to find flights from United Kingdom to Seattle 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 2,558,603 searches. Data last updated junio 12, 2025.
Use the filters below to find and compare flights from the United Kingdom to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
mié. 9/10
4:30 pm-6:20 pm
Nonstop9h 50m
Seattle/Tacoma Intl
dom. 9/14
8:20 pm-1:40 pm
Nonstop9h 20m
LondonSeattle
LGW - SEA
LGWSEA
London Gatwick
jue. 7/10
3:40 pm-8:40 pm
1 stop13h 00m
Seattle/Tacoma Intl
jue. 7/24
11:30 pm-11:45 am
1 stop28h 15m
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
mié. 7/9
9:00 am-5:25 pm
1 stop16h 25m
Seattle/Tacoma Intl
mié. 7/16
8:25 pm-2:15 pm
Nonstop9h 50m
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
mié. 7/9
6:15 am-11:15 am
1 stop13h 00m
Seattle/Tacoma Intl
mar. 7/22
5:35 pm-11:20 am
Nonstop9h 45m
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
dom. 8/31
11:45 am-11:45 am
1 stop32h 00m
Seattle/Tacoma Intl
lun. 9/8
8:25 pm-2:15 pm
Nonstop9h 50m
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
mié. 10/1
6:40 am-2:00 pm
1 stop15h 20m
Seattle/Tacoma Intl
mié. 10/29
12:00 pm-4:00 pm
2 stops45h 00m
EdinburghSeattle
EDI - SEA
EDISEA
Edinburgh Turnhouse
vie. 11/7
12:20 pm-5:00 pm
1 stop12h 40m
Seattle/Tacoma Intl
mié. 11/12
2:35 pm-10:20 am
1 stop11h 45m
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
mié. 7/9
9:25 pm-11:25 am
1 stop22h 00m
Seattle/Tacoma Intl
lun. 7/21
11:30 pm-11:55 am
1 stop28h 25m
LondonSeattle
LCY - SEA
LCYSEA
London City
mié. 10/29
1:30 pm-11:15 pm
2 stops40h 45m
Seattle/Tacoma Intl
sáb. 11/15
3:37 pm-5:05 pm
2 stops17h 28m
LondonSeattle
LHR - SEA
LHRSEA
London Heathrow
lun. 8/18
1:10 pm-8:02 pm
1 stop14h 52m
Seattle/Tacoma Intl
jue. 9/11
1:07 pm-12:15 pm
1 stop15h 08m
Best time to book a flight from United Kingdom to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from United Kingdom with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from the United Kingdom to Seattle
What is the cheapest month to book a flight from United Kingdom to Seattle?
Currently, January is the cheapest month in which you can book a flight from United Kingdom to Seattle (average of $238). Flying from United Kingdom to Seattle in July is currently the most expensive (average of $391). 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.
What is the cheapest time of day to fly from GB to SEA?
Find hourly flight availability from United Kingdom to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated junio 12, 2025.
When flying from United Kingdom to Seattle, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Weekly flight availability from United Kingdom to Seattle
Explore weekly flight availability from United Kingdom to Seattle. 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 junio 12, 2025.
The most flights from GB0 to SEA are scheduled on a Monday (22 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (11 on average).
Rainfall in Seattle by month
Plan your trip to Seattle by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.
Temperature in Seattle by month
Plan your trip to Seattle by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).
Reviews of airlines servicing Seattle
Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated junio 12, 2025.
Peruse reviews from past customers who have flown with Delta, KLM and Finnair from United Kingdom to Seattle to help guide your decision. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
Entertainment
Boarding
Overall
Comfort
Crew
Reviews
Kim,May 2025
PIH - SLC
Food
Entertainment
Boarding
Overall
Comfort
Crew
Reviews
Kim,May 2025
PIH - SLC
Food
Entertainment
Boarding
Overall
Comfort
Crew
Reviews
Kim,May 2025
PIH - SLC
Food
Entertainment
Boarding
Overall
Comfort
Crew
Reviews
Kim,May 2025
PIH - SLC
Food
Entertainment
Boarding
Overall
Comfort
Crew
Reviews
Kim,May 2025
PIH - SLC
Food
Entertainment
Boarding
Overall
Comfort
Crew
Reviews
Kim,May 2025
PIH - SLC
Related info for your journey
Find useful and relevant information for your journey from United Kingdom to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near the United Kingdom?
Book flights to the United Kingdom if you plan to visit one of these locationsBrowse thousands of different options on Cheapflights for your next trip
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Alternative routes for United Kingdom to Seattle
See prices for flight routes from nearby airports that may be better suited for you.
Top 7 airlines flying from United Kingdom to Seattle
Discover the top 7 airlines that operate flights from United Kingdom to Seattle. 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 2,558,603 searches. Data last updated junio 12, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$402 | Average$807 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$551 | Average$845 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$575 | Average$1,001 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$594 | Average$941 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$620 | Average$880 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$620 | Average$889 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$632 | Average$1,071 | FlexibilityNo cancel fee | On-timeN/A |