What aircraft does SQ631 use?

Singapore Airlines flight SQ631 operates on a Boeing 777-300ER from HND to SIN.

How long is the SQ631 flight?

The estimated flight time for SQ631 from HND to SIN is approximately 7h 7m covering 5,300 km (3,293 miles).

How many seats does this Boeing 777-300ER have?

This Singapore Airlines Boeing 777-300ER has 236 total seats across 3 cabin classes: First, Business, Economy.

What cabin classes are available on this aircraft?

This Boeing 777-300ER offers 3 cabin classes: First, Business, Economy. Seat distribution: 4 First seats, 48 Business seats, 184 Economy seats.

What route does SQ631 fly?

Singapore Airlines flight SQ631 operates from HND (Tokyo Haneda International Airport) to SIN (Singapore Changi Airport), connecting Tokyo and Singapore.

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.

What is the seat map for SQ631?

The seat map for SQ631, Singapore Airlines from Tokyo (HND) to Singapore (SIN), is a Boeing 777-300ER in a 3-class configuration with 236 seats, last verified 10 Jun 2026.

What aircraft is SQ631?

SQ631 is scheduled as a Boeing 777-300ER (3-class, 236 seats), last verified 10 Jun 2026.

Flight: SQ631
Airline: Singapore Airlines
Route: Tokyo (HND) to Singapore (SIN)
Aircraft: Boeing 777-300ER
Configuration: 3-class, 236 seats
Last verified: 10 Jun 2026

SQ631 Seat Map

● On time

Singapore Airlines · Boeing 777-300ER · Sun, 13 Apr 2025

Depart

HND · Tokyo

7h 7m

3,293 mi

Arrive

SIN · Singapore

+ Seat alert

236 seats across 3 cabins

F · First

1/4

J · Business

1/48

Y · Economy

64/184

Filter:

First Business Premium Economy Economy Extra legroom / exit Occupied Blocked

View:

First · Business · Economy · Rows 1–62

100%

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Get seat alerts

Top picks · Economy

Highest-scoring available seats on this aircraft

49J

Score 54 #1

Extra legroom · Quick exit access

Extra legroom

49B

Score 54 #2

Extra legroom · Quick exit access

Extra legroom

16F

Score 68 #3

Easy aisle access · Near wings (smoother ride)

Aisle Business

42D

Score 65 #4

Easy aisle access · Near wings (smoother ride)

Aisle

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SQ631 Flight Details

Flight Number: SQ631

Origin:

(Tokyo Haneda International Airport, Tokyo)

Destination:

(Singapore Changi Airport, Singapore)

Distance: 5,300 km (3,293 mi)

Est. Duration: 7h 7m

Flight Date: April 13, 2025

Aircraft: Boeing 777-300ER

Airline Routes: View Singapore Airlines route map

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Flight Route Map

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Aircraft Configuration

Aircraft Details

Seating info & configuration

Airline: Singapore Airlines (SQ)
Aircraft: Boeing 777-300ER
Seating: Main Deck: 236 seats

Economy: 184

64 120 0

35% Available

Business: 48

1 47 0

2% Available

First: 4

1 3 0

25% 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

Singapore Airlines Boeing 777-300ER seat map layout for flight SQ631 from HND to SIN — Reference layout

This Boeing 777-300ER operates Singapore Airlines flight SQ631 from Tokyo (HND) to Singapore (SIN). 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 SQ631

Based on legroom, location, and passenger preferences

Best Window Seats

Seat 50A Economy
Seat 50K Economy
Seat 45K Economy

Best Aisle Seats

Seat 16F Business
Seat 42D Economy
Seat 59H Economy

Best for Legroom

Seat 49J Economy
Seat 49B Economy

Exit Row Seats

Seat 49J Economy
Seat 49B Economy

Quietest Seats

Seat 16F Business
Seat 54A Economy
Seat 52K Economy

Get Notified When Better Seats Open

Monitor SQ631 and receive instant email alerts when window, aisle, or exit row seats become available. Never miss a better seat again.

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.

Reviews

Passenger Reviews for SQ631

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Boeing 777-300ER Seat Map

Full Singapore Airlines Boeing 777-300ER seating chart, cabin layout, and seat reviews.

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