transpacific · 17h 30m · 13,593 km
San Francisco to Singapore
2 airlines · 2 aircraft ranked
In business class, Singapore's Business Class (A350-900) leads the field with a 7.9/10.In premium economy, Singapore's Premium Economy (A350-900) leads the field with a 5.5/10.
Quick pick
Fly Singapore. It has a wider seat (28" vs 22") and free Wi-Fi (paid on United).
If fares are comparable, this is the better cabin.
Fly Singapore. It has free Wi-Fi (paid on United).
If fares are comparable, this is the better cabin.
Fly Singapore. It has a wider seat (18" vs 17") and free Wi-Fi (paid on United).
If prices are similar, go with this one.
Select two airlines to compare head-to-head
Data verified June 2026
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Airlines on this route
Route insights
- In business class, Singapore's Business Class (A350-900) leads the field with a 7.9/10.
- In premium economy, Singapore's Premium Economy (A350-900) leads the field with a 5.5/10.
- In economy, Singapore's Economy (A350-900) leads the field with a 5.4/10.
Frequently asked
Which is better in business: Singapore or United on SFO-SIN?
Business Class (Singapore Airlines, A350-900) beats Polaris (United Airlines, 777-200ER) in business, scoring 7.9/10 vs 6.7. The deciding factor: AC + USB-C vs no power. United Airlines fights back on bedding.
Which is better in premium economy: Singapore or United on SFO-SIN?
Premium Economy (Singapore Airlines, A350-900) beats Premium Plus (United Airlines, 777-200ER) in premium economy, scoring 5.5/10 vs 4.5. The deciding factor: AC + USB-C vs no power.
Which is better in economy: Singapore or United on SFO-SIN?
Economy (Singapore Airlines, A350-900) beats Economy (United Airlines, 777-200ER) in economy, scoring 5.4/10 vs 4. The deciding factor: Free Wi-Fi vs Paid Wi-Fi.
What are the best seats in Singapore Business Class on SFO-SIN?
Best: Bulkhead seats 11K (forward starboard), 10A (forward port), 19A, and 19K have much larger footwells, making sitting and sleeping far more comfortable. These should be first choice, especially for passengers over 6 feet. Secondary picks: center bulkhead seats 11D/11F and 19D/19F for their oversized footrests. Quiet mid-cabin picks: 14A, 14K. Avoid: Any center seat one row behind a bulkhead (12D/12F, 20D/20F) for light and noise bleed from galleys. Last row of each cabin section (18D/18F, 29A/29K). Seat 17D/17F is between two storage cupboards with toilets immediately behind. Non-bulkhead footwells are small and can be uncomfortable for tall passengers. Standard 3-class A350-900 with 42 business seats in staggered 1-2-1. The seat is the Stelia Opal, originally introduced on the 777-300ER but slightly narrower on the A350 fuselage. 18-inch HD LCD screen with Panasonic eX3 IFE. WiFi is complimentary and unlimited for business class. Le Labo amenity kit on request. Slippers, socks, eyeshade, pillow, and duvet provided. Power includes AC outlet, USB-A, and USB-C.
What are the best seats in Singapore Premium Economy on SFO-SIN?
Best: Solo seats at window positions in the rear 1-4-1 rows (41-43) have their own storage bins and extra personal space between the seat and the window. Emergency exit window seats 31A and 31K are dark-horse picks with excellent legroom and no proximity to the exit slide. Unblocked solo seats become available for selection 48 hours before departure. Avoid: 43F and 43G are the worst seats in the cabin. Seats near 42H catch bathroom vacuum noise. Center seats throughout (D, E, F, G) in the 2-4-2 section. Standard 3-class A350-900 with 24 premium economy seats. Layout transitions from 2-4-2 (rows 31-40) to 1-4-1 (rows 41-43) with desirable solo window seats at the back. 13.3-inch seatback IFE. 38-inch pitch with 18.5-inch width. Footrest, adjustable headrest, and in-seat power (AC and USB). Amenity kit on request. Complimentary enhanced meal service. WiFi is paid for premium economy.
What are the best seats in United Polaris on SFO-SIN?
Best: Odd-row window seats (1A, 3A, 5A, etc.) are closest to the window with most privacy. Avoid: Even-row window seats are closer to the aisle. Staggered 1-2-1 Polaris seats with direct aisle access. 16-inch IFE. Saks Fifth Avenue bedding with optional mattress pad. Panasonic Ku-band wifi (paid). Different hard product from the 767-300ER Polaris.
What are the best seats in United Premium Plus on SFO-SIN?
Best: Window pairs for only 2 across. Avoid: Center section inner seats. 2-4-2 premium economy. 13.3-inch IFE. Enhanced plated meals with beer/wine/spirits.