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Flights from LON to Seattle (One-way)

Compare 6 flight options on JAL

* Based on 72 flight price data points (fetched: 2026-02-22). Not real-time data and may not cover all departure dates. Please check the airline's official website for the latest fares and availability.

Lowest Fare$1,121.00
Flight Time13h 10m - 17h 58m
Stops1 stop

Fares by Cabin Class

Economy$1,121 ~ $2,059
First$3,264 ~ $17,766

Available Route Options

6 different routing options available for this route

Outbound/ReturnFlight TimeStopsEconomyFirst
OutboundLHR London Heathrow → DUB Dublin → SEA Seattle
13h 10m
1stop
$1,475~-
OutboundLHR London Heathrow → DFW Dallas → SEA Seattle
16h 5m
1stop
$1,121~$3,264~
OutboundLHR London Heathrow → ORD Chicago → SEA Seattle
16h 16m
1stop
$1,168~-
OutboundLHR London Heathrow → PHL → SEA Seattle
16h 41m
1stop
$1,121~-
OutboundLHR London Heathrow → CLT → SEA Seattle
16h 43m
1stop
$1,121~$4,066~
OutboundLHR London Heathrow → PHX → SEA Seattle
17h 58m
1stop
$1,168~-
Book on Japan Airlines Official Website→
Search real-time LON to Seattle flights on Expedia→

Compare fares with other airlines

Compare fares from different airlines operating on this route. Click on any airline to view detailed flight information and mileage earning potential.

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Miles & Status Points Earning

(when crediting to JAL Mileage Bank)

When crediting this Japan Airlines flight to JAL Mileage Bank, you earn both FLY ON Points (for elite status) and Miles (for award tickets). Here's how they work:

  • FLY ON Points: FLY ON Points are used for elite status qualification. Accumulate enough points within a calendar year to achieve higher status tiers, which unlock benefits like lounge access, priority boarding, bonus miles, and complimentary upgrades. Status points are calculated based on fare price or flight distance depending on the airline.
  • Miles: Miles are your reward currency for free flights. Redeem accumulated miles for award tickets on the airline and its partners. Miles earned depend on flight distance and your booking class. Higher booking classes earn more miles per flight.

The "FLY ON Points/$100" and "Miles/$100" columns show earning efficiency - higher numbers mean better value for your money. Compare different cabin classes to find the best balance between comfort and mileage earning.

As a oneworld member, Japan Airlines flights can be credited to partner programs. Compare earning potential:Executive Club, AAdvantage

CabinFareFLY ON PointsFLY ON Points/$100MilesMiles/$100
Economy$1,121 - $2,0595,603 - 10,297500 - 5005,603 - 10,297500 - 500
First$3,264 - $17,76616,319 - 88,82950016,319 - 88,829500
Learn more about JAL Mileage Bank →

Flight Itineraries & Booking Class Details

Browse 6 available flight options from LON to Seattle. Each itinerary shows the route, layover cities, flight duration, and detailed fare information.

📘What are booking classes?

Even within the same Economy cabin, tickets have hidden categories called "booking classes." Cheaper tickets get lower booking classes (Q, V, etc.) while expensive tickets get higher ones (Y, B, etc.). This dramatically affects how many miles you earn. On popular dates, cheaper booking classes sell out first, so closer to departure you may only find expensive fares—which do earn more miles. Click any fare to see the calculation details.

💡Smart booking tips

To maximize miles earned per dollar spent, look for fares with higher "Points/cost" or "Miles/cost" values. However, keep in mind that booking class also affects change/cancellation flexibility—cheaper fares often have stricter policies.

Flight List
LHRLondon Heathrow → DUBDublin → SEASeattle(13.2h+)
4,814 mi
Economy (Booking Class V)
$1,475 - $1,610
7,375 - 8,050FLY ON Points500 FLY ON Points/$100
7,375 - 8,050Miles500 Miles/$100
▼
Economy (Booking Class L)
$1,677 - $1,812
8,387 - 9,061FLY ON Points500 FLY ON Points/$100
8,387 - 9,061Miles500 Miles/$100
▼
LHRLondon Heathrow → DFWDallas → SEASeattle(16.1h+)
6,410 mi
Economy (Booking Class Q)
$1,121 - $1,330
5,603 - 6,648FLY ON Points500 FLY ON Points/$100
5,603 - 6,648Miles500 Miles/$100
▼
Economy (Booking Class N)
$1,225 - $1,434
6,122 - 7,167FLY ON Points500 FLY ON Points/$100
6,122 - 7,167Miles500 Miles/$100
▼
Economy (Booking Class V)
$1,446 - $1,655
7,228 - 8,273FLY ON Points500 FLY ON Points/$100
7,228 - 8,273Miles500 Miles/$100
▼
Economy (Booking Class K)
$1,850 - $2,059
9,251 - 10,297FLY ON Points500 FLY ON Points/$100
9,251 - 10,297Miles500 Miles/$100
▼
First/Business (Booking Class I)
$2,870 - $4,023
14,350 - 20,116FLY ON Points500 FLY ON Points/$100
14,350 - 20,116Miles500 Miles/$100
▼
First (Booking Class R)
$3,264 - $4,154
16,319 - 20,770FLY ON Points500 FLY ON Points/$100
16,319 - 20,770Miles500 Miles/$100
▼
Premium Eco/Economy (Booking Class W)
$3,678
18,389FLY ON Points500 FLY ON Points/$100
18,389Miles500 Miles/$100
▼
First (Booking Class A)
$12,216 - $12,593
61,078 - 62,967FLY ON Points500 FLY ON Points/$100
61,078 - 62,967Miles500 Miles/$100
▼
First/Business (Booking Class C)
$12,243 - $12,727
61,213 - 63,634FLY ON Points500 FLY ON Points/$100
61,213 - 63,634Miles500 Miles/$100
▼
LHRLondon Heathrow → ORDChicago → SEASeattle(16.3h+)
5,676 mi
Economy (Booking Class N)
$1,168 - $1,434
5,839 - 7,167FLY ON Points500-500 FLY ON Points/$100
5,839 - 7,167Miles500-500 Miles/$100
▼
Economy (Booking Class V)
$1,446 - $1,655
7,228 - 8,273FLY ON Points500 FLY ON Points/$100
7,228 - 8,273Miles500 Miles/$100
▼
Economy (Booking Class M)
$1,715 - $1,925
8,577 - 9,622FLY ON Points500-500 FLY ON Points/$100
8,577 - 9,622Miles500-500 Miles/$100
▼
First/Business (Booking Class I)
$2,870 - $3,484
14,350 - 17,418FLY ON Points500-500 FLY ON Points/$100
14,350 - 17,418Miles500-500 Miles/$100
▼
Premium Eco/Economy (Booking Class W)
$3,678
18,389FLY ON Points500 FLY ON Points/$100
18,389Miles500 Miles/$100
▼
LHRLondon Heathrow → PHL → SEASeattle(16.7h+)
5,918 mi
Economy (Booking Class Q)
$1,121 - $1,330
5,603 - 6,648FLY ON Points500 FLY ON Points/$100
5,603 - 6,648Miles500 Miles/$100
▼
Economy (Booking Class S)
$1,256 - $1,465
6,277 - 7,322FLY ON Points500 FLY ON Points/$100
6,277 - 7,322Miles500 Miles/$100
▼
First/Business (Booking Class I)
$2,870 - $3,484
14,350 - 17,418FLY ON Points500-500 FLY ON Points/$100
14,350 - 17,418Miles500-500 Miles/$100
▼
Premium Eco/Economy (Booking Class W)
$3,678
18,389FLY ON Points500 FLY ON Points/$100
18,389Miles500 Miles/$100
▼
LHRLondon Heathrow → CLT → SEASeattle(16.7h+)
6,269 mi
Economy (Booking Class Q)
$1,121 - $1,330
5,603 - 6,648FLY ON Points500 FLY ON Points/$100
5,603 - 6,648Miles500 Miles/$100
▼
First/Business (Booking Class I)
$2,870 - $3,484
14,350 - 17,418FLY ON Points500-500 FLY ON Points/$100
14,350 - 17,418Miles500-500 Miles/$100
▼
Premium Eco/Economy (Booking Class W)
$3,678
18,389FLY ON Points500 FLY ON Points/$100
18,389Miles500 Miles/$100
▼
First (Booking Class R)
$4,066 - $4,417
20,332 - 22,085FLY ON Points500 FLY ON Points/$100
20,332 - 22,085Miles500 Miles/$100
▼
First (Booking Class F)
$17,766
88,829FLY ON Points500 FLY ON Points/$100
88,829Miles500 Miles/$100
▼
LHRLondon Heathrow → PHX → SEASeattle(18.0h+)
6,374 mi
Economy (Booking Class N)
$1,168 - $1,377
5,839 - 6,884FLY ON Points500 FLY ON Points/$100
5,839 - 6,884Miles500 Miles/$100
▼
Premium Eco/Economy (Booking Class W)
$3,678
18,389FLY ON Points500 FLY ON Points/$100
18,389Miles500 Miles/$100
▼
First/Business (Booking Class C)
$12,243 - $12,620
61,213 - 63,101FLY ON Points500 FLY ON Points/$100
61,213 - 63,101Miles500 Miles/$100
▼

FAQ

You can earn between 5,603 and 88,829 Loyalty Points depending on booking class. Economy: 5,603–10,297. First: 16,319–88,829. First/Business (Mixed): 14,350–63,634. Premium Economy/Economy (Mixed): 18,389–18,389.

The lowest fare starts at $1,121. Economy from $1,121. First from $3,264. First/Business (Mixed) from $2,870. Premium Economy/Economy (Mixed) from $3,678.

Yes. American Airlines flights can also be credited to: FLY ON Points (JAL), Tier Points (BA).

The shortest flight time is approximately 13.2h.

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OriginLONLONChange
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DestinationSEASeattle
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