UA's Polaris Business Class includes lie-flat seats and Saks Fifth Avenue bedding.
UA's Premium Plus offers extra legroom, upgraded meals, and priority check-in on international routes.

Most accurate provider | Justfly.com 3 stars |
|---|---|
Most trusted provider | Justfly.com 3 stars |
Round-trip from | $594 (FlightHub) |
One-way from | $265 (FlightHub) |
Popular in | December |
Cheapest in | August |
Average price | $1,733 |
Good round-trip deal | $682 or less |
Good one-way deal | $122 or less |
Fly from
Fly to
Route
Depart
Return
Price
San FranciscoSingapore
SFO - SIN
SFOSIN
San Francisco
Thu 3/19
11:00 am-7:00 am
1 stop29h 00m
Singapore Changi
Wed 4/1
9:00 am-3:35 pm
1 stop45h 35m
San FranciscoSingapore
SFO - SIN
SFOSIN
San Francisco
Mon 2/9
10:35 am-8:15 pm
Nonstop17h 40m
Singapore Changi
Mon 2/16
10:10 am-9:05 am
Nonstop14h 55m
San FranciscoSingapore
SFO - SIN
SFOSIN
San Francisco
Mon 1/12
10:35 am-8:15 pm
Nonstop17h 40m
Singapore Changi
Sun 1/25
10:20 pm-9:15 pm
Nonstop14h 55m
OntarioSingapore
ONT - SIN
ONTSIN
Ontario
Sun 3/1
7:30 am-12:10 am
2 stops24h 40m
Singapore Changi
Sun 3/8
10:30 pm-10:33 pm
2 stops39h 03m
San FranciscoSingapore
SFO - SIN
SFOSIN
San Francisco
Wed 1/28
10:35 am-8:15 pm
Nonstop17h 40m
Singapore Changi
Tue 2/10
10:45 am-3:20 pm
1 stop20h 35m
San FranciscoSingapore
SFO - SIN
SFOSIN
San Francisco
Sun 2/1
10:15 am-6:55 am
1 stop28h 40m
Singapore Changi
Sun 2/15
10:20 pm-9:15 pm
Nonstop14h 55m
San FranciscoSingapore
SFO - SIN
SFOSIN
San Francisco
Sat 1/24
9:10 am-6:55 am
2 stops29h 45m
Singapore Changi
Sun 2/1
10:20 pm-9:15 pm
Nonstop14h 55m
San FranciscoSingapore
SFO - SIN
SFOSIN
San Francisco
Fri 2/6
11:40 am-8:25 pm
1 stop40h 45m
Singapore Changi
Sun 2/15
1:35 am-9:30 am
1 stop23h 55m
San FranciscoSingapore
SFO - SIN
SFOSIN
San Francisco
Sun 1/18
7:25 am-12:55 am
2 stops25h 30m
Singapore Changi
Tue 1/27
10:10 am-9:00 am
Nonstop14h 50m
San FranciscoSingapore
SFO - SIN
SFOSIN
San Francisco
Mon 3/30
11:30 pm-9:30 pm
1 stop31h 00m
Singapore Changi
Tue 4/14
10:50 pm-3:00 pm
1 stop31h 10m
Currently, January is the cheapest month in which you can book a flight from USA to Singapore (average of $534). Flying from USA to Singapore in June is currently the most expensive (average of $768). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Unlike in the morning, when flights are generally more expensive, you can save up to 7% on flights from USA to Singapore by exploring options for tickets at noon.
Travelers seeking maximum savings on their USA to Singapore flight should consider departing on Monday mornings when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
The most flights from US0 to SIN are scheduled on a Wednesday (3 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).
About 15% of weekly flights between United States and Singapore have experienced delays in the past year, with the average delay time being 128 minutes.
Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.
Monday tends to have the lowest number of delays on this route, whereas Thursday has historically faced a higher average of delays compared to other days of the week.
Over the last year, Singapore Airlines have had the lowest number of delays on this route, with just 13% of flights being delayed.
Food
Crew
Boarding
Comfort
Overall
Entertainment
Reviews
Wee Keng,Dec 2025
HKG - SIN
Food
Crew
Boarding
Comfort
Overall
Entertainment
Reviews
Wee Keng,Dec 2025
HKG - SIN
Food
Crew
Boarding
Comfort
Overall
Entertainment
Reviews
Wee Keng,Dec 2025
HKG - SIN
Food
Crew
Boarding
Comfort
Overall
Entertainment
Reviews
Wee Keng,Dec 2025
HKG - SIN
Food
Crew
Boarding
Comfort
Overall
Entertainment
Reviews
Wee Keng,Dec 2025
HKG - SIN
Food
Crew
Boarding
Comfort
Overall
Entertainment
Reviews
Wee Keng,Dec 2025
HKG - SIN
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$383 | Average$1,321 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$490 | Average$1,106 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$500 | Average$2,234 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$582 | Average$809 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$588 | Average$1,023 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$602 | Average$682 | FlexibilityNo cancel fee | On-time60% | |
| Cheapest$610 | Average$1,041 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$654 | Average$912 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$654 | Average$967 | FlexibilityNo cancel fee | On-time80% | |
| Cheapest$656 | Average$691 | FlexibilityNo cancel fee | On-time67% |