What aircraft does UA143 use?

United Airlines flight UA143 operates on a Boeing 787-9 from DEN to NRT.

How long is the UA143 flight?

The estimated flight time for UA143 from DEN to NRT is approximately 12h 7m covering 9,293 km (5,774 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 UA143 fly?

United Airlines flight UA143 operates from DEN (Denver International Airport) to NRT (Narita International Airport), connecting Denver and Narita.

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.

UA143 Seat Map

● On time

United Airlines · Boeing 787-9 · Mon, 26 Jan 2026

Depart

DEN · Denver

12h 7m

5,774 mi

Arrive

NRT · Narita

+ Seat alert

J · Business

35/48

Y · Economy

86/188

Filter:

First Business Premium Economy Economy Extra legroom / exit Occupied Blocked

View:

Business · Economy · Rows 1–57

No Seat Data for January 26, 2026

We don't have cached seat availability data for this specific date. The seat map below shows the general aircraft layout, but seat availability may differ on your travel date.

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Real-time data directly from the airline

Showing general aircraft seat map layout:

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Get seat alerts

Top picks · Business

Highest-scoring available seats on this aircraft

Score 68 #1

Easy aisle access · Near wings (smoother ride)

Aisle Business

11F

Score 68 #2

Easy aisle access · Near wings (smoother ride)

Aisle Business

11D

Score 68 #3

Easy aisle access · Near wings (smoother ride)

Aisle Business

Score 68 #4

Easy aisle access · Near wings (smoother ride)

Quiet zone Business

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No Seat Data for January 26, 2026

We don't have cached seat availability for this date. The seat map shows the general aircraft layout. Showing layout from April 23, 2025.

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UA143 Flight Details

Flight Number: UA143

Origin:

(Denver International Airport, Denver)

Destination:

(Narita International Airport, Narita)

Distance: 9,293 km (5,774 mi)

Est. Duration: 12h 7m

Flight Date: January 26, 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

86 56 46

46% Available

Business: 48

35 13 0

73% 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 UA143 from Denver (DEN) to Narita (NRT). 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 UA143

Based on legroom, location, and passenger preferences

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Best Aisle Seats

Seat 9A Business
Seat 11F Business
Seat 11D Business

Quietest Seats

Seat 9D Business
Seat 9A Business
Seat 9F Business

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

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Reviews

Passenger Reviews for UA143

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Boeing 787-9 Seat Map

Full United Airlines Boeing 787-9 seating chart, cabin layout, and seat reviews.

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UA143 Seat Map

No Seat Data for January 26, 2026

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UA143 Flight Details

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Seat Configuration Statistics

Aircraft Configuration

Aircraft Details

Seat Status

Cabin Classes

Features

Best Seats on UA143

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Best Aisle Seats

Quietest Seats

Seat Selection Assistance

Seat Alerts Require Payment

Passenger Reviews for UA143

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Boeing 787-9 Seat Map

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