Are there direct flights from Seattle to London?

Historically, direct flights from Seattle to London have been available, making up 12.4% of the total flights. For flights that include stopovers, travelers typically encountered a median of 2 stopovers. This indicates that while direct options exist, a significant portion of flights on this route involve connections.

How long does it take to fly from Seattle to London?

The typical direct flight from Seattle to London takes approximately 9 hours and 30 minutes, covering a distance of 7695 kilometers. For flights with one stop, the median travel time increases significantly to about 14 hours and 40 minutes. This difference highlights the convenience of direct routes when available.

Are there frequently good prices on flights from Seattle to London?

Historically, flights from Seattle to London have frequently shown good prices. This route is classified as one with frequent deals. Travelers can often find competitive fares when planning their trips.

Flights From Seattle

To London

Cheap Flights from Seattle to London

Browse current best options from Seattle. Become a member to unlock all deals and get alerts when new deals appear.

Deals from

Seattle

RatePunk searches hundreds of travel sites at once for deals on flights to London

Prices updated 2 days ago

405 airlines compared

80%+ AI score for best value

Fares are subject to change and may not be available for all dates. (Data last updated Jul 26, 2026.)

Today’s best flight deals from Seattle to London

Explore current cheapest deals departing from Seattle to London

2026-11-08 – 2026-11-15
SEA - London
90% AI deal score
$776
$535
Round trip
2026-12-03 – 2026-12-10
SEA - London
91% AI deal score
$786
$550
Round trip
2026-10-14 – 2026-10-21
SEA - London
86% AI deal score
$698
$551
Round trip
2026-09-25 – 2026-09-27
SEA - London
92% AI deal score
$855
$554
Round trip
2026-11-19 – 2026-11-26
SEA - London
89% AI deal score
$722
$554
Round trip
2026-10-15 – 2026-10-18
SEA - London
83% AI deal score
$677
$556
Round trip
2026-10-07 – 2026-10-19
SEA - London
80% AI deal score
$625
$557
Round trip
2026-10-13 – 2026-10-28
SEA - London
80% AI deal score
$623
$558
Round trip
2026-10-12 – 2026-10-18
SEA - London
86% AI deal score
$698
$560
Round trip
2026-10-05 – 2026-10-10
SEA - London
86% AI deal score
$713
$562
Round trip

Seattle to London: Overview

Insights for flights from Seattle to London

Most itineraries for flights from Seattle to London connect at least once. Only 12.4% of recent fares were for direct flights from Seattle to London, based on a 90-day analysis. For the majority of itineraries that include connections, the typical number of stopovers is 2.

When considering cheap flights from Seattle to London, fares typically range from $841–$1279, with a median of $1020. Right now, fares are near the typical level. Only 4% of recent fares were classified as a good price. New deals appear almost daily, suggesting frequent opportunities to find favorable pricing.

If you are looking for the cheapest time to fly from Seattle to London, the data indicates that February is typically the most affordable month, with a median fare of $482. Following closely are April, with a median fare of $583, and March, where the median fare is $605.

A typical journey from Seattle to London takes about 9h 30m, including connections. Given that most itineraries involve at least one stop, this median duration reflects the overall travel time rather than just the non-stop flight time. For connecting itineraries, the median travel time is 18h 0m, while non-stop flights have a median duration of 9h 30m.

The distance between Seattle and London is approximately 7695 kilometers, classifying this as a long-haul route. This distance typically involves a significant amount of travel time, often necessitating connecting flights.

How much is a round trip from Seattle to London

Regular price: $678 - $1,544

Prices from Seattle to London are currently below the regular range.

The regular price range for flights from Seattle to London is $678 to $1544. The current lowest deal is $535 with Icelandair for travel from Nov 8-Nov 15.

now $535

Low $678

High $1,544

The cheapest time to fly from Seattle to London

The cheapest month to fly from Seattle to London is February, with a median price of $376. The most expensive month is July, with a median price of $1221. Prices are generally lower from February to December.

February

Cheapest

Flights from $376

July

Most Expensive

Flights from $1,221

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Direct flights from Seattle to London

Alaska Airlines, Inc.

Last-minute flights going from Seattle to London

Tue, Aug 4

⌛ Last-Minute

SEA - London

Seattle (SEA) - London (LHR)

Icelandair

$936

$704

One-way

Sun, Aug 16

⌛ Last-Minute

SEA - London

Seattle (SEA) - London (LHR)

Scandinavian Airlines

$1,075

$732

One-way

Sun, Aug 16

⌛ Last-Minute

SEA - London

Seattle (SEA) - London (LHR)

Scandinavian Airlines

$1,003

$733

One-way

Mon, Aug 17

⌛ Last-Minute

SEA - London

Seattle (SEA) - London (STN)

Icelandair

$921

$618

One-way

Mon, Aug 17

⌛ Last-Minute

SEA - London

Seattle (SEA) - London (LGW)

Icelandair

$924

$618

One-way

Mon, Aug 17

⌛ Last-Minute

SEA - London

Seattle (SEA) - London (STN)

Icelandair

$964

$633

One-way

Biggest price drops on these dates for flights from Seattle to London

2 nights

Aug 28 - Aug 30

$1,032 → $603

42%

9 nights

Dec 4 - Dec 13

$986 → $578

41%

8 nights

Dec 7 - Dec 15

$985 → $592

40%

4 nights

Aug 22 - Aug 26

$1,009 → $635

37%

Popular Airports to fly from Seattle to London

Seattle - London route insights

💸 Price insights

Recent fares near the typical level

Recent fares from Seattle to London are near the typical level of $1020.

📅 Best time to fly

February is historically cheapest at $376

Historically, February is the cheapest month to fly from Seattle to London, with a median price of $376.

⏱️ Flight duration

Direct flights average 9h 30m

Direct flights from Seattle to London typically average 9h 30m, while connecting flights average 18h 0m.

✈️ Airlines & availability

Connecting flights are dominant

Only 12.4% of recent flights from Seattle to London are direct, with connecting flights dominant.

🏆 Airline highlight

Alaska Airlines offers direct flights

Alaska Airlines, Inc. offers direct flights from Seattle to London.

🎯 Booking tip

Deals appear frequently

Deals for flights from Seattle to London appear frequently, with 4% considered good prices.

Seattle main airports to depart from

Seattle–Tacoma International (SEA)

Cheapest

Seattle–Tacoma International Airport is a key departure point for flights from Seattle to London.

📍 ~18 km from Seattle city center (reachable by car or train).

💸 Flights from ~$450

London main airports to arrive at

London Stansted (STN)

Cheapest

Consider London Stansted for a budget-friendly arrival option when flying from Seattle to London.

📍 ~49 km from London city center (reachable by car)

💸 Flights from ~$450

Airports nearby London used as alternative

Birmingham (BHX)

Cheapest

Birmingham Airport is a major international hub with excellent rail connectivity to London Euston.

📍 ~160 km from London (reachable by train)

💸 Flights from ~$607

Frequently Asked Questions About Flights to London

Historically, the lowest prices for flights from Seattle to London are found when booking 14-27 days in advance. During this period, the average price was $670. Booking 7-13 days out saw average prices increase to $1042, while booking 60+ days in advance typically resulted in higher prices, averaging $1136. Prices generally rise significantly for bookings made within a week of departure, with flights booked 0-6 days prior averaging $980.

Across the trailing quarter, a good price for a flight from Seattle to London was considered to be $841 or less. The median price for this route was $1020. Prices above the median, such as $1279, were observed for the more expensive fares. Travelers aiming for a good deal should target prices at or below the $841 threshold.

Historically, February has been the cheapest month to fly from Seattle to London, with a median price of $482. April also offered competitive prices, with a median of $583. In contrast, the annual median price for this route was $1020. March had a median price of $605, making it one of the more affordable options as well.

Related routes

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Flights to London from other cities

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Seattle to London: Overview

Insights for flights from Seattle to London

How much is a round trip from Seattle to London

Regular price: $678 - $1,544

Prices from Seattle to London are currently below the regular range.

The regular price range for flights from Seattle to London is $678 to $1544. The current lowest deal is $535 with Icelandair for travel from Nov 8-Nov 15.

now $535

Low $678

High $1,544

The cheapest time to fly from Seattle to London

February

Cheapest

Flights from $376

July

Most Expensive

Flights from $1,221

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec