What aircraft does UA842 use?

United Airlines flight UA842 operates on a Boeing 787-9 from SYD to LAX.

How long is the UA842 flight?

The estimated flight time for UA842 from SYD to LAX is approximately 15h 35m covering 12,061 km (7,494 miles).

How many seats does this Boeing 787-9 have?

This United Airlines Boeing 787-9 has 236 total seats across 2 cabin classes: Business, Economy.

What cabin classes are available on this aircraft?

This Boeing 787-9 offers 2 cabin classes: Business, Economy. Seat distribution: 48 Business seats, 188 Economy seats.

What route does UA842 fly?

United Airlines flight UA842 operates from SYD (Sydney Kingsford Smith International Airport) to LAX (Los Angeles International Airport), connecting Sydney (Mascot) and Los Angeles.

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.

UA842 Seat Map

● On time

United Airlines · Boeing 787-9 · Fri, 09 Jan 2026

Depart

SYD · Sydney (Mascot)

15h 35m

7,494 mi

Arrive

LAX · Los Angeles

+ Seat alert

J · Business

24/48

Y · Economy

159/188

Filter:

First Business Premium Economy Economy Extra legroom / exit Occupied Blocked

View:

Business · Economy · Rows 1–57

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Get seat alerts

Top picks · Business

Highest-scoring available seats on this aircraft

11L

Score 63 #1

Easy aisle access · Front of cabin (faster service)

Aisle Business

11F

Score 63 #2

Easy aisle access · Front of cabin (faster service)

Aisle Business

11D

Score 63 #3

Easy aisle access · Front of cabin (faster service)

Aisle Business

49L

Score 58 #4

Window view

Window

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UA842 Flight Details

Flight Number: UA842

Origin:

(Sydney Kingsford Smith International Airport, Sydney (Mascot))

Destination:

(Los Angeles International Airport, Los Angeles)

Distance: 12,061 km (7,494 mi)

Est. Duration: 15h 35m

Flight Date: January 09, 2026

Aircraft: Boeing 787-9

Airline Routes: View United Airlines route map

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Flight Route Map

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Aircraft Configuration

Aircraft Details

Seating info & configuration

Airline: United Airlines (UA)
Aircraft: Boeing 787-9
Seating: Main Deck: 236 seats

Economy: 188

159 9 20

85% Available

Business: 48

24 24 0

50% 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

This Boeing 787-9 operates United Airlines flight UA842 from Sydney (Mascot) (SYD) to Los Angeles (LAX). 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 UA842

Based on legroom, location, and passenger preferences

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Best Window Seats

Seat 49L Economy
Seat 50L Economy
Seat 51A Economy

Best Aisle Seats

Seat 11L Business
Seat 11F Business
Seat 11D Business

Quietest Seats

Seat 30A Economy
Seat 30B Economy
Seat 30E 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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