What aircraft does JL42 use?

Japan Airlines Domestic flight JL42 operates on a Boeing 787-8 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

● On time

Japan Airlines Domestic · Boeing 787-8 · Tue, 03 Mar 2026

Depart

LHR · London

12h 29m

5,960 mi

Arrive

HND · Tokyo

+ Seat alert

J · Business

21/30

Y · Economy

123/156

Filter:

First Business Premium Economy Economy Extra legroom / exit Occupied Blocked

View:

Business · Economy · Rows 1–55

100%

Pinch to zoom • Double-tap to zoom in

Business

Economy

Business

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1A

1C

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Top picks · Economy

Highest-scoring available seats on this aircraft

45A

Score 60 #1

Quick exit access · Window view

Extra legroom

45C

Score 60 #2

Quick exit access · Easy aisle access

Extra legroom

45H

Score 60 #3

Quick exit access · Easy aisle access

Extra legroom

21H

Score 68 #4

Easy aisle access · Near wings (smoother ride)

Aisle

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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

Explore More Routes:

View flights from LHR View flights to HND View Japan Airlines Domestic route map

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

Cabin Classes

First

Business

Premium Economy

Economy

Extra legroom / exit

Features

Exit door

WC Lavatory

GALLEY Galley

CREW Crew area

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

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 24K Economy
Seat 7A Business
Seat 7K Business

Best Aisle Seats

Seat 21H Economy
Seat 21G Economy
Seat 21D 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 7H Business
Seat 19H Economy
Seat 19K Economy

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

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Seat Selection Assistance

Seat Alerts Require Payment

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.

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