What aircraft does UA28 use?

United Airlines flight UA28 operates on a aircraft from SIN to SFO.

How long is the UA28 flight?

The estimated flight time for UA28 from SIN to SFO is approximately 17h 29m covering 13,581 km (8,439 miles).

What route does UA28 fly?

United Airlines flight UA28 operates from SIN (Singapore Changi Airport) to SFO (San Francisco International Airport), connecting Singapore and San Francisco.

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.

UA28 Seat Map — Singapore to San Francisco

United Airlines Boeing 787-9 Mar 31, 2026

United Airlines flight UA28 operates from Singapore (SIN) to San Francisco (SFO) using a Boeing 787-9 with 187 seats across Business and Economy. Use the interactive seat map below to find the best seat for your flight.

Filter:

Available Window Aisle Extra Legroom Occupied

View:

100%

Pinch to zoom • Double-tap to zoom in

Main Deck

Business Class

10A

10D

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Economy Class

30A

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UA28 Flight Details

Flight Number: UA28

Origin:

(Singapore Changi Airport, Singapore)

Destination:

(San Francisco International Airport, San Francisco)

Distance: 13,581 km (8,439 mi)

Est. Duration: 17h 29m

Flight Date: March 31, 2026

Aircraft: Boeing 787-9

Airline Routes: View United Airlines route map

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Aircraft Configuration

Aircraft Details

Seating info & configuration

Airline: United Airlines (UA)
Aircraft: Boeing 787-9
Seating: Main Deck: 187 seats

Economy: 123

43 0 80

35% Available

Business: 64

64 0 0

100% Available
Legend: Seat Status

Blocked

Occupied

Standard

Seat Types

Premium

Legroom

Window

Aisle

Features

EXIT Exit Row

LAV Lavatory

GAL Galley

CREW Crew

United Airlines Boeing 787-9 seat map layout for flight UA28 from SIN to SFO

This Boeing 787-9 operates United Airlines flight UA28 from Singapore (SIN) to San Francisco (SFO). 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 UA28

Based on legroom, location, and passenger preferences

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Best Window Seats

Seat 1A Business
Seat 1L Business
Seat 2A Business

Best Aisle Seats

Seat 1D Business
Seat 1F Business
Seat 2D Business

Quietest Seats

Seat 43L Economy
Seat 41F Economy
Seat 12L 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

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.