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 24 days ago
486,190 searches this week
171 airlines compared
80%+ AI score for best value
Fares are subject to change and may not be available for all dates. (Data last updated May 29, 2026.)
Today’s best flight deals from Seattle to London
Explore current cheapest deals departing from Seattle to London
Round trip
Sort by: Cheapest
August 19 - August 25
SEA - London
$928
$522
Round trip
August 20 - August 26
SEA - London
$928
$537
Round trip
August 20 - August 25
SEA - London
$948
$541
Round trip
August 11 - August 25
SEA - London
$902
$541
Round trip
August 20 - August 23
SEA - London
$958
$557
Round trip
August 13 - August 21
SEA - London
$908
$560
Round trip
August 13 - August 19
SEA - London
$924
$564
Round trip
August 19 - August 26
SEA - London
$944
$566
Round trip
August 17 - August 24
SEA - London
$929
$571
Round trip
August 13 - August 20
SEA - London
$921
$574
Round trip
Unlock all 500+ flight deals to London and get alerts when great deals appear
Route Intelligence — 486,190 Searches this Week
Insights for flights from Seattle to London
How much is a round trip from Seattle to London
Regular price: $781 - $1,701
Prices are currently below the regular range for flights from Seattle to London.
The regular price range for flights from Seattle to London Stansted is $781 to $1701. The current lowest deal is $522 with Air Canada, for travel from Aug 19-Aug 25.
now $522
Low $781
High $1,701
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 $482. The most expensive month is August, with a median price of $1206. Prices are generally lower from January to November.
February
Flights from $482
August
Flights from $1,206
Direct flights from Seattle to London
Alaska Airlines, Inc.
Last-minute flights going from Seattle to London
Sun, Jul 5
SEA - London
Seattle (SEA) - London (LHR)
Icelandair
$947
$731
One-way
Mon, Jul 6
SEA - London
Seattle (SEA) - London (LHR)
Icelandair
$992
$725
One-way
Mon, Jul 6
SEA - London
Seattle (SEA) - London (LGW)
Icelandair
$958
$727
One-way
Tue, Jul 7
SEA - London
Seattle (SEA) - London (LHR)
Icelandair
$969
$721
One-way
Tue, Jul 7
SEA - London
Seattle (SEA) - London (LHR)
Icelandair
$992
$726
One-way
Wed, Jul 8
SEA - London
Seattle (SEA) - London (LHR)
Icelandair
$977
$727
One-way
Biggest price drops on these dates for flights from Seattle to London
Aug 20 - Aug 25
$948 → $541
43%
Aug 19 - Aug 25
$928 → $522
44%
Aug 20 - Aug 23
$958 → $557
42%
Aug 20 - Aug 26
$928 → $537
42%
Popular Airports to fly from Seattle to London
Seattle - London route insights
💸 Price insights
Recent fares are below the typical level
Recent fares from Seattle to London are below the typical level, with deals as low as $522.
📅 Best time to fly
Fly in February for the best prices
Historically, February offers the lowest median prices at $482, significantly cheaper than August.
⏱️ Flight duration
Connecting flights average 28h 40m
Flights from Seattle to London typically involve connecting, with a median duration of 28h 40m.
✈️ Airlines & availability
Connecting flights are dominant
Only 14.2% of deals are direct, with most routes involving two or more stopovers.
🏆 Airline highlight
Air Canada offers the best recent deal
The best recent deal from Seattle to London was $522 with Air Canada.
🎯 Booking tip
Deals are frequent for this route
Historically, deals for flights from Seattle to London appear frequently, averaging one per day.
Seattle main airports to depart from
Seattle–Tacoma International (SEA)
Seattle–Tacoma International Airport is a primary departure point for flights from Seattle to London.
📍 ~20 km from Seattle city center (reachable by car or public transport).
💸 Flights from ~$522
Boeing Field (BFI)
Boeing Field offers an alternative departure option for travelers flying from Seattle to London.
📍 ~10 km from Seattle city center (reachable by car).
💸 Flights from ~$1172
Kenmore Air Harbor Seaplane Base (LKE)
Kenmore Air Harbor Seaplane Base is another option for flights departing from Seattle to London.
📍 ~5 km from Seattle city center (reachable by car).
💸 Flights from ~$1224
London main airports to arrive at
London Stansted (STN)
London Stansted offers a budget-friendly option for flights from Seattle to London.
📍 ~50 km from city center (reachable by car)
💸 Flights from ~$522
Gatwick (LGW)
Gatwick is a major London airport, suitable for arrivals from Seattle.
📍 ~40 km from city center (reachable by car)
💸 Flights from ~$541
Heathrow (LHR)
Heathrow is a primary international gateway for travelers arriving in London from Seattle.
📍 ~25 km from city center (reachable by car)
💸 Flights from ~$581
London City (LCY)
London City Airport provides a convenient arrival point for flights from Seattle to London.
📍 ~10 km from city center (reachable by car)
💸 Flights from ~$879
London Southend (SEN)
London Southend offers an alternative arrival airport for flights from Seattle to London.
📍 ~60 km from city center (reachable by car)
💸 Flights from ~$813
Luton (LTN)
Luton Airport is another option for flights arriving in London from Seattle.
📍 ~45 km from city center (reachable by car)
💸 Flights from ~$650
Airports nearby London used as alternative
Birmingham (BHX)
Birmingham Airport is a major international hub with excellent rail connectivity from London Euston and Marylebone.
📍 ~160 km from London (reachable by rail)
💸 Flights from ~$744
Southampton (SOU)
Southampton Airport is the closest alternative with a direct rail link to London Waterloo.
📍 ~110 km from London (reachable by rail)
💸 Flights from ~$748
Bristol (BRS)
Bristol Airport offers a large selection of low-cost carrier routes across Europe.
📍 ~170 km from London (reachable by coach or rail with bus transfer)
💸 Flights from ~$746
East Midlands (EMA)
East Midlands Airport has a strong presence of budget airlines and is easily accessible via the M1.
📍 ~170 km from London (reachable by car)
💸 Flights from ~$931
Bournemouth (BOH)
Bournemouth Airport is an alternative for travelers in South West London or the Home Counties.
📍 ~150 km from London (reachable by car)
💸 Flights from ~$1063
Business & First Class Flight Deals to London
Discover luxury on the budget with premium cabin class on flights from Seattle to London.
Elite
Best Elite deals to London
Exclusive daily First Class, Business Class, and Premium Economy flight deals, refreshed every 24 hours.
From SEA
Elite
Aug 11
London, United Kingdom
95% AI deal score
$6,138
$2,835
Save $3,303
From SEA
Elite
Aug 11
London, United Kingdom
95% AI deal score
$6,138
$2,848
Save $3,290
From SEA
Elite
Dec 03
London, United Kingdom
95% AI deal score
$5,918
$2,884
Save $3,034
From SEA
Elite
Nov 03
London, United Kingdom
94% AI deal score
$5,543
$2,833
Save $2,710
From SEA
Elite
Aug 01
London, United Kingdom
94% AI deal score
$6,093
$2,897
Save $3,196
From SEA
Elite
Nov 25
London, United Kingdom
93% AI deal score
$5,154
$2,977
Save $2,177
From SEA
Elite
Nov 03
London, United Kingdom
93% AI deal score
$5,188
$3,077
Save $2,111
From SEA
Elite
Nov 16
London, United Kingdom
93% AI deal score
$5,261
$3,077
Save $2,184
From SEA
Elite
Nov 11
London, United Kingdom
93% AI deal score
$5,241
$3,077
Save $2,164
From SEA
Elite
Nov 03
London, United Kingdom
93% AI deal score
$5,237
$3,077
Save $2,160
From SEA
Elite
Aug 11
London, United Kingdom
92% AI deal score
$6,243
$2,625
Save $3,618
From SEA
Elite
Aug 21
London, United Kingdom
92% AI deal score
$4,387
$2,672
Save $1,715
From SEA
Elite
Aug 21
London, United Kingdom
92% AI deal score
$4,517
$2,819
Save $1,698
From SEA
Elite
Aug 23
London, United Kingdom
92% AI deal score
$6,348
$2,848
Save $3,500
From SEA
Elite
Aug 21
London, United Kingdom
92% AI deal score
$4,406
$2,892
Save $1,514
From SEA
Elite
Aug 21
London, United Kingdom
92% AI deal score
$4,434
$2,895
Save $1,539
From SEA
Elite
Jul 29
London, United Kingdom
92% AI deal score
$2,900
$1,945
Save $955
From SEA
Elite
Aug 21
London, United Kingdom
91% AI deal score
$4,401
$2,893
Save $1,508
From SEA
Elite
Aug 21
London, United Kingdom
91% AI deal score
$4,258
$2,902
Save $1,356
From SEA
Elite
Oct 25
London, United Kingdom
91% AI deal score
$4,181
$2,932
Save $1,249
From SEA
Elite
Oct 19
London, United Kingdom
91% AI deal score
$4,185
$2,932
Save $1,253
From SEA
Elite
Oct 27
London, United Kingdom
91% AI deal score
$4,181
$2,932
Save $1,249
From SEA
Elite
Aug 23
London, United Kingdom
91% AI deal score
$4,404
$3,071
Save $1,333
From SEA
Elite
Aug 04
London, United Kingdom
91% AI deal score
$8,152
$5,019
Save $3,133
From SEA
Elite
Aug 07
London, United Kingdom
91% AI deal score
$2,495
$1,816
Save $679
From SEA
Elite
Oct 19
London, United Kingdom
90% AI deal score
$4,003
$2,837
Save $1,166
From SEA
Elite
Oct 26
London, United Kingdom
90% AI deal score
$3,990
$2,930
Save $1,060
From SEA
Elite
Oct 26
London, United Kingdom
90% AI deal score
$3,990
$2,931
Save $1,059
From SEA
Elite
Oct 25
London, United Kingdom
90% AI deal score
$3,990
$2,932
Save $1,058
From SEA
Elite
Oct 21
London, United Kingdom
90% AI deal score
$4,003
$2,932
Save $1,071
From SEA
Elite
Oct 20
London, United Kingdom
90% AI deal score
$4,019
$2,932
Save $1,087
From SEA
Elite
Oct 19
London, United Kingdom
90% AI deal score
$4,012
$2,932
Save $1,080
From SEA
Elite
Oct 25
London, United Kingdom
90% AI deal score
$3,990
$2,932
Save $1,058
From SEA
Elite
Oct 21
London, United Kingdom
90% AI deal score
$4,012
$2,932
Save $1,080
From SEA
Elite
Aug 20
London, United Kingdom
90% AI deal score
$4,434
$2,979
Save $1,455
From SEA
Elite
Aug 16
London, United Kingdom
90% AI deal score
$2,503
$1,752
Save $751
From SEA
Elite
Aug 22
London, United Kingdom
90% AI deal score
$2,490
$1,765
Save $725
From SEA
Elite
Aug 24
London, United Kingdom
90% AI deal score
$2,488
$1,765
Save $723
From SEA
Elite
Aug 17
London, United Kingdom
90% AI deal score
$2,503
$1,765
Save $738
From SEA
Elite
Aug 18
London, United Kingdom
90% AI deal score
$2,497
$1,765
Save $732
From SEA
Elite
Aug 06
London, United Kingdom
90% AI deal score
$2,506
$1,765
Save $741
From SEA
Elite
Aug 04
London, United Kingdom
90% AI deal score
$2,499
$1,765
Save $734
From SEA
Elite
Aug 11
London, United Kingdom
90% AI deal score
$2,505
$1,765
Save $740
From SEA
Elite
Aug 23
London, United Kingdom
90% AI deal score
$2,490
$1,790
Save $700
From SEA
Elite
Aug 09
London, United Kingdom
90% AI deal score
$2,507
$1,790
Save $717
From SEA
Elite
Aug 19
London, United Kingdom
90% AI deal score
$2,491
$1,790
Save $701
From SEA
Elite
Oct 28
London, United Kingdom
89% AI deal score
$4,070
$3,057
Save $1,013
From SEA
Elite
Oct 13
London, United Kingdom
89% AI deal score
$4,054
$3,078
Save $976
From SEA
Elite
Aug 23
London, United Kingdom
89% AI deal score
$2,732
$1,945
Save $787
From SEA
Elite
Aug 16
London, United Kingdom
88% AI deal score
$2,505
$1,912
Save $593
From SEA
Elite
Aug 16
London, United Kingdom
88% AI deal score
$2,503
$1,912
Save $591
From SEA
Elite
Aug 16
London, United Kingdom
88% AI deal score
$2,505
$1,912
Save $593
From SEA
Elite
Aug 16
London, United Kingdom
88% AI deal score
$2,503
$1,912
Save $591
From SEA
Elite
Aug 16
London, United Kingdom
87% AI deal score
$2,487
$1,912
Save $575
From SEA
Elite
Aug 16
London, United Kingdom
87% AI deal score
$2,497
$1,912
Save $585
From SEA
Elite
Aug 16
London, United Kingdom
87% AI deal score
$2,487
$1,912
Save $575
From SEA
Elite
Aug 16
London, United Kingdom
87% AI deal score
$2,487
$1,912
Save $575
From SEA
Elite
Aug 09
London, United Kingdom
87% AI deal score
$2,507
$1,945
Save $562
From SEA
Elite
Aug 09
London, United Kingdom
87% AI deal score
$2,500
$1,945
Save $555
From SEA
Elite
Aug 23
London, United Kingdom
87% AI deal score
$2,490
$1,945
Save $545
From SEA
Elite
Aug 23
London, United Kingdom
87% AI deal score
$2,490
$1,945
Save $545
From SEA
Elite
Aug 23
London, United Kingdom
87% AI deal score
$2,507
$1,945
Save $562
From SEA
Elite
Aug 09
London, United Kingdom
87% AI deal score
$2,507
$1,945
Save $562
From SEA
Elite
Aug 02
London, United Kingdom
87% AI deal score
$2,496
$1,945
Save $551
From SEA
Elite
Aug 02
London, United Kingdom
87% AI deal score
$2,503
$1,945
Save $558
From SEA
Elite
Aug 19
London, United Kingdom
87% AI deal score
$2,503
$1,945
Save $558
From SEA
Elite
Aug 19
London, United Kingdom
87% AI deal score
$2,492
$1,945
Save $547
From SEA
Elite
Aug 19
London, United Kingdom
87% AI deal score
$2,467
$1,945
Save $522
From SEA
Elite
Aug 09
London, United Kingdom
87% AI deal score
$2,505
$1,945
Save $560
From SEA
Elite
Aug 02
London, United Kingdom
87% AI deal score
$2,503
$1,945
Save $558
From SEA
Elite
Aug 23
London, United Kingdom
87% AI deal score
$2,568
$1,945
Save $623
From SEA
Elite
Aug 23
London, United Kingdom
87% AI deal score
$2,490
$1,945
Save $545
From SEA
Elite
Aug 19
London, United Kingdom
86% AI deal score
$2,468
$1,945
Save $523
From SEA
Elite
Jul 14
London, United Kingdom
84% AI deal score
$6,451
$4,718
Save $1,733
From SEA
Elite
Jul 14
London, United Kingdom
84% AI deal score
$6,459
$4,722
Save $1,737
From SEA
Elite
Jul 15
London, United Kingdom
84% AI deal score
$6,409
$4,726
Save $1,683
From SEA
Elite
Jul 14
London, United Kingdom
84% AI deal score
$6,354
$4,726
Save $1,628
From SEA
Elite
Jul 15
London, United Kingdom
84% AI deal score
$6,321
$4,726
Save $1,595
From SEA
Elite
Jul 15
London, United Kingdom
84% AI deal score
$6,424
$4,726
Save $1,698
From SEA
Elite
Jul 22
London, United Kingdom
84% AI deal score
$6,424
$4,729
Save $1,695
From SEA
Elite
Jul 22
London, United Kingdom
84% AI deal score
$6,409
$4,729
Save $1,680
From SEA
Elite
Jul 14
London, United Kingdom
84% AI deal score
$6,351
$4,737
Save $1,614
From SEA
Elite
Jul 18
London, United Kingdom
83% AI deal score
$6,362
$4,976
Save $1,386
From SEA
Elite
Dec 08
London, United Kingdom
83% AI deal score
$19,462
$17,150
Save $2,312
From SEA
Elite
Nov 18
London, United Kingdom
82% AI deal score
$5,545
$4,501
Save $1,044
From SEA
Elite
Nov 18
London, United Kingdom
82% AI deal score
$5,398
$4,501
Save $897
From SEA
Elite
Dec 01
London, United Kingdom
82% AI deal score
$5,286
$4,501
Save $785
From SEA
Elite
Aug 09
London, United Kingdom
82% AI deal score
$2,518
$2,256
Save $262
From SEA
Elite
Aug 09
London, United Kingdom
82% AI deal score
$2,519
$2,256
Save $263
From SEA
Elite
Aug 02
London, United Kingdom
82% AI deal score
$2,504
$2,256
Save $248
From SEA
Elite
Aug 04
London, United Kingdom
82% AI deal score
$2,517
$2,256
Save $261
From SEA
Elite
Aug 04
London, United Kingdom
82% AI deal score
$2,518
$2,256
Save $262
From SEA
Elite
Aug 04
London, United Kingdom
82% AI deal score
$2,517
$2,256
Save $261
From SEA
Elite
Aug 07
London, United Kingdom
82% AI deal score
$2,612
$2,377
Save $235
From SEA
Elite
Aug 08
London, United Kingdom
82% AI deal score
$2,612
$2,377
Save $235
From SEA
Elite
Aug 11
London, United Kingdom
82% AI deal score
$2,610
$2,380
Save $230
From SEA
Elite
Aug 20
London, United Kingdom
81% AI deal score
$6,333
$5,357
Save $976
From SEA
Elite
Aug 02
London, United Kingdom
81% AI deal score
$2,495
$2,256
Save $239
From SEA
Elite
Aug 20
London, United Kingdom
80% AI deal score
$6,261
$5,347
Save $914
From SEA
Elite
Aug 11
London, United Kingdom
80% AI deal score
$2,611
$2,474
Save $137