What aircraft does JL42 use?

Japan Airlines Domestic flight JL42 operates on a aircraft from LHR to HND.

How long is the JL42 flight?

The estimated flight time for JL42 from LHR to HND is approximately 12h 29m covering 9,591 km (5,960 miles).

What route does JL42 fly?

Japan Airlines Domestic flight JL42 operates from LHR (London Heathrow Airport) to HND (Tokyo Haneda International Airport), connecting London and Tokyo.

How do I choose the best seat?

The best seat depends on your priorities. For extra legroom, choose seats near emergency exits or bulkhead rows. For quick boarding/deplaning, select seats near the front. Avoid seats near lavatories or galleys if you prefer a quieter flight. Window seats offer views and a wall to lean against, while aisle seats provide easier access to move around.

What do the different seat colors mean?

Green seats are typically available for selection, red seats are occupied or blocked, yellow/orange seats may have restrictions or extra fees, and blue seats often indicate premium or preferred seating with additional charges. Hover over any seat to see specific details and pricing.

Can I change my seat after booking?

Yes, most airlines allow seat changes after booking, though fees may apply depending on your fare type and desired seat. You can typically change seats through the airline's website, mobile app, or by calling customer service. Some seats become available closer to departure as the airline releases blocked inventory.

When is the best time to select seats?

The best time varies by strategy. Book immediately after purchasing your ticket for the widest selection, or wait until 24 hours before departure when airlines often release blocked premium seats. For popular routes, early selection is recommended. Our seat alerts can notify you when preferred seats become available.

Are the seat maps updated in real-time?

Our flight seat maps are updated regularly throughout the day to reflect current availability. However, seat availability can change rapidly, especially close to departure. We recommend checking the airline's official website for the most up-to-date information when making your final selection.

What if my preferred seat isn't available?

You can also check back periodically as seats often open up closer to departure when other passengers make changes or when the airline releases additional inventory.

JL42 Seat Map — London to Tokyo

Japan Airlines Domestic Boeing 787-8 Mar 03, 2026

Japan Airlines Domestic flight JL42 operates from London (LHR) to Tokyo (HND) using a Boeing 787-8 with 186 seats across Economy and Business. Use the interactive seat map below to find the best seat for your flight.

Filter:

Available Window Aisle Extra Legroom Occupied

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Business Class

Economy Class

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JL42 Flight Details

Flight Number: JL42

Origin:

(London Heathrow Airport, London)

Destination:

(Tokyo Haneda International Airport, Tokyo)

Distance: 9,591 km (5,960 mi)

Est. Duration: 12h 29m

Flight Date: March 03, 2026

Aircraft: Boeing 787-8

Airline Routes: View Japan Airlines Domestic route map

Award Availability: Check award seats on AwardTravelFinder

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Flight Route Map

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Aircraft Configuration

Aircraft Details

Seating info & configuration

Airline: Japan Airlines Domestic (JL)
Aircraft: Boeing 787-8
Seating: Main Deck: 186 seats

Economy: 156

123 19 14

79% Available

Business: 30

21 4 5

70% Available
Legend: Seat Status

Blocked

Occupied

Standard

Seat Types

Premium

Legroom

Window

Aisle

Features

EXIT Exit Row

LAV Lavatory

GAL Galley

CREW Crew

Japan Airlines Domestic Boeing 787-8 seat map layout for flight JL42 from LHR to HND

This Boeing 787-8 operates Japan Airlines Domestic flight JL42 from London (LHR) to Tokyo (HND). Browse the interactive seat map above to find the best seats for your journey, view real passenger reviews, and explore detailed cabin configurations to make an informed decision for your flight.

Best Seats on JL42

Based on legroom, location, and passenger preferences

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Best Window Seats

Seat 45K Economy
Seat 45A Economy
Seat 47A Economy

Best Aisle Seats

Seat 45H Economy
Seat 45C Economy
Seat 19D Economy

Best for Legroom

Seat 45A Economy
Seat 45C Economy
Seat 45H Economy

Exit Row Seats

Seat 45A Economy
Seat 45C Economy
Seat 45H Economy

Quietest Seats

Seat 18D Economy
Seat 21H Economy
Seat 21K Economy

Recommendations based on seat characteristics, cabin position, and proximity to facilities. Availability may vary by date.

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Seat Selection Assistance

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Seat alerts are available to users with a paid plan or credits. This feature monitors seat availability and notifies you when your preferred seats become available.