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Find cheap one-way flights from Seattle to London starting at US$173.

Discover our range of affordable one-way and round-trip flights from Seattle to London and kick-start your next adventure today!

  • One way
  • Round-trip

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Seattle to London Flight time & Schedules

Flight info.
Departure
Arrival
Weekly Schedule
  1. DL562

    08:20

    SEA

    4.9h

    16:16

    ATL

    SMTWTFS
  2. VS104

    19:55

    ATL

    7.9h

    07:50

    LHR

    SMTWTFS
  3. DL536

    09:25

    SEA

    3.3h

    14:45

    MSP

    SMTWTFS
  4. DL010

    22:10

    MSP

    9.1h

    12:15

    LHR

    SMTWTFS
  5. VS1913

    13:30

    SEA

    2.2h

    16:40

    SLC

    SMTWTFS
  6. VS4020

    17:15

    SLC

    10.8h

    10:00

    LHR

    SMT-TF-
  7. VS1582

    14:55

    SEA

    3.5h

    20:25

    MSP

    SMTWTFS
  8. VS4040

    22:10

    MSP

    9.1h

    12:15

    LHR

    SMTWTFS
  9. WS3613

    15:15

    SEA

    1.9h

    18:07

    YYC

    -----F-
  10. WS018

    20:35

    YYC

    8.5h

    12:05

    LHR

    SMTWTFS
  11. WS1553

    15:15

    SEA

    1.7h

    17:55

    YYC

    SM-WT-S
  12. WS018

    20:35

    YYC

    8.5h

    12:05

    LHR

    SMTWTFS
  13. FI680

    15:35

    SEA

    7.7h

    06:15

    KEF

    SMTWTFS
  14. FI470

    07:40

    KEF

    3.3h

    10:55

    LGW

    S-TWTFS
  15. FI680

    15:35

    SEA

    7.7h

    06:15

    KEF

    SMTWTFS
  16. FI450

    07:35

    KEF

    3.3h

    10:50

    LHR

    SMTWTFS
  17. AY5448

    19:50

    SEA

    9.4h

    Nonstop

    12:15

    LHR

    SMTWTFS
  18. IB3506

    19:50

    SEA

    9.4h

    Nonstop

    12:15

    LHR

    SMTWTFS

When is the cheapest time to book flights from Seattle to London?

These price trend charts carefully monitor and predict how flight prices from Seattle to London will change. Keep a close eye on them to understand when the best time to buy your tickets is.

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Cheapest airlines flights from Seattle to London

We have a range of prices from different airlines providing flights from Seattle to London. Check below for the journey which best suits your travel needs.

Frequently Asked Questions

  • When are flight tickets from Seattle (SEA) to London (LON) the cheapest?

    Airlines adjust prices for flights from Seattle to London based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.
  • How much do flights from Seattle (SEA) to London (LON) cost?

    According to Trip.com's data, the lowest price is around $875.
  • How long does it take to fly from Seattle (SEA) to London (LON) and what is the distance?

    It takes around 9 hours 32 minutes to fly from Seattle (SEA) to London (LON).
  • What is the transportation method from the main airport to downtown in London?

    • The distance from Heathrow Airport to downtown is about 23 km. It takes about 40 minutes by taxi.
    • The distance from London Gatwick Airport to downtown is about 39 km. It takes about 50 minutes by taxi.
    • The distance from London Luton Airport to downtown is about 44 km. It takes about 1 hour by taxi.
  • What are the most popular airlines that fly from Seattle (SEA) to London (LON)?

How to find a cheap flight from Seattle to London

Understanding the common pitfalls when booking your flight tickets can help you save massively when it comes time to fly. We’ve listed our six essential steps to keep in mind when you’re booking flight tickets to help you find the best price.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com

Seattle to London Flight Information

Cheapest nonstop flight price$173
Cheapest round-trip ticket price$545
Off-season for travelDecember
Peak season for travelMay
Flight distance7,711.56 km
Average flight time9 hours 32 minutes
Popular airlineFinnair