SFO - SIN

$417 Find Cheap Flights from San Francisco to Singapore

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Francisco to Singapore departing on 11/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Singapore

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to Singapore.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to Singapore.
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Everything you should know

Cheapest round-trip
$916
Typical prices: $861-$629
United Airlines
Sun 8/9Sun 8/23
SFO - SIN • Non-stop
Cheapest non-stop
$934
Typical prices: $1,330-$890
Singapore Airlines
Wed 10/14Sun 12/20
SFO - SIN • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Singapore Airlines offers free Wi-Fi for all passengers.
SFO provides curbside check-in for United passengers.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from $916 (round-trip)
Best reviews • 8.5 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with Singapore Airlines and United Airlines. Average duration is 16h 45m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Avoid delays
Most punctual • 89% on-time
Best time • Fewest delays
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $727 (round-trip)
Shortest trip • 20h 57m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 17% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 27% price drop
Most popular
Good to know
Good to know
+1
+1
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+1
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Flight Deals

Cheap Flights from San Francisco to Singapore (SFO-SIN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Francisco to Singapore that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from San Francisco to Singapore

Sun, Aug 9 - Sun, Aug 23
United Airlines Logo
11:10 am - 6:35 pm
SFO
-
SIN
16h 25mnonstop
United Airlines Logo
6:15 am - 4:55 pm
SIN
-
SFO
25h 40m
1 stop
$916United Airlines
Wed, Nov 11 - Tue, Dec 1
Multiple Airlines Logo
7:30 am - 4:55 am
SFO
-
SIN
29h 25m
2 stops
Multiple Airlines Logo
11:55 pm - 8:35 pm
SIN
-
SFO
36h 40m
2 stops
$917Multiple Airlines
Mon, Oct 5 - Wed, Oct 21
United Airlines Logo
12:15 pm - 12:45 am
SFO
-
SIN
21h 30m
1 stop
United Airlines Logo
11:05 am - 4:30 pm
SIN
-
SFO
20h 25m
1 stop
$919United Airlines
Fri, Aug 21 - Tue, Aug 25
United Airlines Logo
10:50 pm - 6:40 am
SFO
-
SIN
40h 50m
2 stops
United Airlines Logo
11:05 am - 4:55 pm
SIN
-
SFO
20h 50m
1 stop
$920United Airlines
Tue, Sep 29 - Mon, Oct 19
United Airlines Logo
12:15 pm - 12:45 am
SFO
-
SIN
21h 30m
1 stop
United Airlines Logo
6:15 am - 10:30 am
SIN
-
SFO
19h 15m
1 stop
$922United Airlines
Tue, Aug 25 - Thu, Sep 3
United Airlines Logo
7:00 am - 12:45 am
SFO
-
SIN
26h 45m
2 stops
United Airlines Logo
11:05 am - 4:30 pm
SIN
-
SFO
20h 25m
1 stop
$923United Airlines
Mon, Sep 7 - Thu, Sep 24
ANA Logo
1:10 am - 5:15 pm
SFO
-
SIN
25h 05m
1 stop
ANA Logo
10:00 pm - 4:30 pm
SIN
-
SFO
33h 30m
1 stop
$924ANA
Wed, May 27 - Thu, Jun 11
Air Canada Logo
10:52 pm - 5:15 am
SFO
-
SIN
39h 23m
2 stops
Air Canada Logo
7:00 am - 12:13 pm
SIN
-
SFO
44h 13m
2 stops
$925Air Canada
Mon, Nov 2 - Thu, Nov 5
China Eastern Logo
12:00 pm - 1:30 am
SFO
-
SIN
45h 30m
2 stops
China Eastern Logo
11:00 pm - 5:49 pm
SIN
-
SFO
34h 49m
2 stops
$926China Eastern
Wed, Oct 7 - Wed, Oct 21
ANA Logo
12:15 pm - 11:20 pm
SFO
-
SIN
20h 05m
1 stop
ANA Logo
11:05 am - 4:30 pm
SIN
-
SFO
20h 25m
1 stop
$927ANA
Booking Insights

KAYAK's insights & trends for San Francisco to Singapore flights

Get data-powered insights and trends into flights from San Francisco to Singapore to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from San Francisco to Singapore?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from San Francisco to Singapore departing in August.

What’s the cheapest day of the week to fly from San Francisco to Singapore?

The average price of all round-trip flights from San Francisco to Singapore clicked on KAYAK for each day over the last 12 months.

When flying from San Francisco to Singapore, you should consider leaving on a Monday and avoid Saturdays if you are looking for the best rates. For your return to San Francisco, you’ll find the best rates on Tuesdays and the most expensive ones on Sundays.

What is the cheapest month to fly from San Francisco to Singapore?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Francisco to Singapore, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from San Francisco to Singapore is September, where tickets cost $650 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $1,451 and $1,193 respectively.

Can I save money by flying with a layover from San Francisco to Singapore?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $995, prices are generally cheapest when you fly direct.

How far in advance should I book a flight from San Francisco to Singapore?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from San Francisco to Singapore, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from San Francisco to Singapore, you should book around 2 weeks before departure, which saves you about 17% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 12 weeks before departure.

Expert advice

Expert advice for your flight from San Francisco to Singapore

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Chris Dong

Chris Dong

Expert on Singapore Airlines

Chris is a consumer travel reporter covering aviation, trending travel news, hotels, and loyalty programs—all for leading global publications like Travel + Leisure, The Washington Post, AFAR, and more. In addition to writing, Chris is a video host for Travel + Leisure, giving consumers an inside look at the latest in air travel.

Stefanie Waldek

Stefanie Waldek

Expert on United Airlines

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Jessica Macdonald

Jessica Macdonald

Expert on SIN

Currently based in Scotland after living in South Africa and the United States, Jessica has been writing travel and aviation content for more than 10 years. She regularly contributes to Travel + Leisure and TripSavvy, and has had work published by Condé Nast Traveller and The Independent. She has traveled to more than 50 countries across six continents.

Blane Bachelor

Blane Bachelor

Expert on SFO

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Good to know

Low seasonJuly
Cheapest flight$417
Best time to beat the crowds but there is an average 22% increase in price.
Most popular time to fly with an average 63% increase in price.
Flight from San Francisco to Singapore

When to book flights from San Francisco to Singapore

Are your dates flexible? Find out the best times to travel from San Francisco to Singapore based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from San Francisco to Singapore

  • Are there any nonstop flights between San Francisco and Changi International Airport?

    There is a nonstop flight between these two airports that Singapore airlines offers to travelers on this route.

  • What is a good choice for a hotel that has a location near Changi International Airport?

    There are actually a couple of hotel choices that have locations right on the airport property. The Yotelair Singapore Changi Airport and the Ambassador Transit Lounge Singapore T2 can be found at the airport for your convenience.

  • Are there public transportation options to get from Changi Airport to the center of the city?

    There are several public buses that can take you from the airport to a number of locations throughout the city. Bus numbers 24, 27, 34, 36, 53, 110, and 858 can be found operating from Terminals 1, 2, and 3. Bus routes 24, 34, 36, and 110 also make stops at Terminal 4. Fares range from around S$1 ($0.75) to S$2 ($1.50) depending on the distance you are traveling.

  • Is there a good public transportation option to get from downtown San Francisco to San Francisco International Airport?

    Perhaps the best way to get to the airport is through the city's highly efficient Bay Area Rapid Transit (BART) Rapid Rail service. The train station sits on the Departures Level of the International Terminal and the fare to ride the train is around $10.

  • What is the cheapest flight from San Francisco to Singapore?

    In the last 3 days, the lowest price for a flight from San Francisco to Singapore was $417 for a one-way ticket and $916 for a round-trip.

  • Do I need a passport to fly between San Francisco and Singapore?

    Yes

  • Which airports will I be using when flying from San Francisco to Singapore?

    San Francisco and Singapore are both served by 1 main airport. You will leave San Francisco from San Francisco and will be arriving at Singapore Changi.

  • Which airlines offer Wi-Fi service onboard planes from San Francisco to Singapore?

    Only Asiana Airlines offers inflight Wi-Fi service on the San Francisco to Singapore flight route.

  • Which aircraft models fly most regularly from San Francisco to Singapore?

    The Boeing 777-300ER is the aircraft model that flies most regularly on the San Francisco to Singapore flight route.

  • Which airline alliances offer flights from San Francisco to Singapore?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between San Francisco and Singapore, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from San Francisco to Singapore?

    There are nonstop flights from San Francisco to Singapore on a daily basis.

  • Which is the best airline for flights from San Francisco to Singapore, EVA Air or Korean Air?

    The two airlines most popular with KAYAK users for flights from San Francisco to Singapore are EVA Air and Korean Air. With an average price for the route of $1,462 and an overall rating of 8.5, EVA Air is the most popular choice. Korean Air is also a great choice for the route, with an average price of $703 and an overall rating of 8.4.

  • How does KAYAK find such low prices on flights from San Francisco to Singapore?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from San Francisco to Singapore.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from San Francisco to Singapore?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Singapore from San Francisco is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from San Francisco to Singapore?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Singapore with an airline and back to San Francisco with another airline. Booking your flights between San Francisco and SIN can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from San Francisco to Singapore?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Singapore from San Francisco up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from San Francisco to Singapore

  • Looking for a cheap flight? 25% of our users found flights on this route for $687 or less one-way and $887 or less round-trip.
  • An amazing feature of the Changi Airport that you'll notice upon your arrival is the Arrival Garden that's located on Level One at Terminal 1. This garden has all manner of natural greenery and one of these exhibits actually emulates a dragonfly habitat.
  • If you plan on driving yourself to San Francisco International Airport before your flight to Singapore, you'll be happy to know that the airport offers 2 international garages where you can park your car. The rate to park in the garage is around $36 per day.
  • If you have just arrived in Singapore and want to store some of your bags, the airport offers a baggage storage solution. The rates vary from around S$7 ($5) to S$24 ($18) per item per day based on the item size. The service is available 24/7.
  • If you are bringing the kids along on your trip to Singapore, San Francisco International Airport has 3 different Kids'Spot locations that feature interactive exhibits for children to explore while waiting for their flight. These areas sit in Terminal 3 by both the E and F gates as well as in Terminal 2 by the D gates.
  • The Changi Airport offers several amenities for travelers with disabilities. These include an accessible changing room that has a location in Terminal 3, Basement 2, and hearing enhancement systems found at the information counters located in the airport.
  • If you're looking for something to do before your flight to Singapore, San Francisco International Airport offers several SFO Museum Exhibits that present a number of different works that highlight art, culture, science, and historical topics. There are two of these exhibits in both Terminal 2 and Terminal 3.

Prefer to fly direct from San Francisco to Singapore?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from San Francisco to Singapore Changi.
Find which airlines fly direct from San Francisco Airport to Singapore Changi Airport, which days they fly and book direct flights.

Direct departures

San Francisco to Singapore Changi

Monday

Singapore Airlines,United Airlines

Singapore Airlines,United Airlines

Tuesday

Singapore Airlines,United Airlines

Singapore Airlines,United Airlines

Wednesday

Singapore Airlines,United Airlines

Singapore Airlines,United Airlines

Thursday

Singapore Airlines,United Airlines

Singapore Airlines,United Airlines

Friday

Singapore Airlines,United Airlines

Singapore Airlines,United Airlines

Saturday

Singapore Airlines,United Airlines

Singapore Airlines,United Airlines

Sunday

Singapore Airlines,United Airlines

Singapore Airlines,United Airlines

See more direct flights

Direct returns

Singapore Changi to San Francisco

Monday

Singapore Airlines,United Airlines

Singapore Airlines,United Airlines

Tuesday

Singapore Airlines,United Airlines

Singapore Airlines,United Airlines

Wednesday

Singapore Airlines,United Airlines

Singapore Airlines,United Airlines

Thursday

Singapore Airlines,United Airlines

Singapore Airlines,United Airlines

Friday

Singapore Airlines,United Airlines

Singapore Airlines,United Airlines

Saturday

Singapore Airlines,United Airlines

Singapore Airlines,United Airlines

Sunday

Singapore Airlines,United Airlines

Singapore Airlines,United Airlines

See more direct flights

Reviews of the top 5 airlines serving from San Francisco to Singapore

 
See real verified KAYAK customer reviews for airlines flying from San Francisco to Singapore. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from San Francisco to Singapore? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.5
EVA AirOverall score based on 1447 reviews
8.6Crew
8.0Entertainment
8.1Food
8.3Comfort
8.4Boarding
Airline reviews

The food was great; the attendants were pleasant. Waiting to onboard felt stressful, as passengers who had connecting flights at SEA had to be verified again for two things before getting a real boarding pass: passport and carry-on luggage weight. The boarding pass issued by another airline (i.e., the first leg of my trip) did not count. The S terminal at SEA was barren, with lots of sensory overloads because every airline was repeatedly broadcasting long lists of names of passengers who had not gone through that verification process. The carry-on luggage weight check seemed futile to me. I saw a woman who opened her over-weight suitcase to move some items into her shoulder bag. She still boarded with two huge bags with her. I assume this check is an endeavor of ensuring fairness of the overhead bin space or optimizing fuel efficiency when gas price is through the roof, but I don't know if either goal is achieved. Nonetheless I respect the crew's dedication to the SOP.

8.0 ExcellentAnonymous, May 2026
SEA - TPE
Read more EVA Air reviews

The food was great; the attendants were pleasant. Waiting to onboard felt stressful, as passengers who had connecting flights at SEA had to be verified again for two things before getting a real boarding pass: passport and carry-on luggage weight. The boarding pass issued by another airline (i.e., the first leg of my trip) did not count. The S terminal at SEA was barren, with lots of sensory overloads because every airline was repeatedly broadcasting long lists of names of passengers who had not gone through that verification process. The carry-on luggage weight check seemed futile to me. I saw a woman who opened her over-weight suitcase to move some items into her shoulder bag. She still boarded with two huge bags with her. I assume this check is an endeavor of ensuring fairness of the overhead bin space or optimizing fuel efficiency when gas price is through the roof, but I don't know if either goal is achieved. Nonetheless I respect the crew's dedication to the SOP.

Food tasted like the meat had freezer burn. Another thing all of our 4 check baggage was left somewhere and my oral medication for my diabetes was left in one of the lost luggage..most of the flight attendants did not know how to communicate in English.. the trip was a total nightmare

The crew need to be more friendly it seem everything such a rush situation during dinner and breakfast. Smiles to the passenger go such a long way just the service from Seattle to Taipei, service from Taipei to Bangkok were great more pleasant the flight attendant from Thailand she was very nice, as far as entertainment were amazing , wiffi connection was incredible great, I will be able to charged my phone from Seattle to Taipei and from taipei to Bangkok I won’t be able to do so flight attendant told me that because I don’t have the original iPhone charger connection has nothing to do what type of charger I have so she said there is nothing she can do about it. Foods : from Seattle to Taipei were ok no flavor , from Taipei to Bangkok I have chicken teriyaki the rice is overcooked all the flavor stuck on the aluminum wraps , breakfast the congee was on point and delicious. Will I recommend anyone to fly with Eva air go for it so you can experience yourself for myself I won’t fly with them again I’m gonna stick with Singapore airlines instead.

Never went. Got rescheduled with Phillipine Airlines to Bali, which was fine.

I am really satisfied with Eva Air and will definitely fly with them again.

The flight from SEA to Taipei was on a Boeing 787-10. Economy seats were unacceptably cramped and the seats themselves were old and lacking cushion. I'm only 5'3" and couldn't cross my legs as my knees were up against the seat in front of me! I could not get WiFi to work most of the time on both flights and crew were invisible except to serve meals. The onboard entertainment also did not work reliably and was very hard to hear through the provided earbuds. The Asian vegetarian meals were interesting. I hope they can provide a fully vegan option though these meals seemed to be already. I appreciate their providing these meals options for vegans. I don't think I'll fly a 787-10 if I can help it. It was the definition of a sardine can in Economy.

My luggage was lost and didnt arrive in manila yesterday. And until now im still waiting for the confirmation if my luggage is teady for pick up in terminal 1

I always preferred EVA air every time I visit Philippines. It’s just this time that I have to be very early to make sure that I don’t miss my flight due to TSA problem. There’s only one choice of food serve which you use to have 2 on our flight from Taiwan to Philippines . Otherwise I will still use EVA air in my future flight.

Service was great. Flight schedule was on time. Staffs are friendly.

Overall was good but it would be good if the airline is providing snack such as sandwich or instant noodle between meals for LA to Taipei

Kayak really screwed up by offloading the booking to a third party. They were completely inept and caused a bunch of toil. I will never use Kayak again.

I had ordered vegetarian food. What I was presented was extremely dissatisfying and not up to the mark. I pretty much did not eat entire 19 hours. For.an airline voted as best in business, it was extremely disappointing. Seats were not comfortable to sleep. Entertainment system didn’t have much choice. WiFi didn’t work for more than half the time. Cabin crew were also difficult to understand. A bit of diversity like Emirates crew would go a long way.

A little more room from the reclining seat in the front of me.

It was okay. I feel that Singapore Airlines isn't as good as it used to be but it's still not bad

It was fine. Nothing special but nothing went wrong so all good.

Overall the airline tried to give excellent service. The wheelchair service was bad at SFO. My baggage was also delayed but I thank them for taking the trouble to find it and deliver it to my home.

I felt that the whole experience went very smoothly. The aircraft was extremely clean and tidy on boarding. The cabin crew were beautifully turned out very, very efficient and were a credit to Singapore Airlines who are now my favourite carrier.

Excellent crew service. Professional, courteous. Service with a smile. Good food Very decent flight experience

Overall were very good and I was satisfied w/ all the food and services.

Service was very good, food and entertainment systems were good

Smooth sailing trip, pilots are good. Less amount of food offered but the quality is okey.

Humm, I should have known that the seat I peaked on my flight from Inchon to Manila was designed for a toddler or very small person.

The staff hold my luggage to steel and exchange my stub, i was very disappointed.

Kayak uses scammer sites to steal money from their victims.

Kayak along with airfare assay are attempting to steal my money. Charges are being pressed.

Customer service and attention to details. The food was good.

I’d have rated Asiana good except an unfortunate incident in which I felt one of your employee didn’t really help us. During the first leg of the trip, the flight from LAX to ICN, I left my backpack on the plane. When I realized, I reported to one of your employee who promised me that it’d be taken care of, that my backpack will be there at HCM city. When we arrived there, HCM people had no idea and my backpack was still at Incheon airport who denied any knowledge whatsoever. I was left in the cold and felt helpless. I was very disappointed. I’d like someone to look into this and let me know.

I am thankful that I was able to fly using Asiana

It was my first time flying Asiana but i was very pleased with how professional and understanding the flight crew is with little kids. One flight attendant held my 3 year old daughter’s hand guiding her to the exit after landing while i had my hands full with luggage and my infant. She was very helpful.

The customer service was excellent. They noticed that our connecting flight was scheduled too closely for us to complete customs, so they changed the flight. Our initial flight was delayed, and they were able to get us on another flight, all without charging us any additional fees. I would fly them again anytime!

Had a bad experience with crew member coming back Hong Kong to la the person next to me one of the passenger have taken video and picture of crew member the person that served meal young kid late 20' s 6 5'10 had attitude at his peak anything I asked for I don't know if it was bad day or racial I felt humiliated as people could see difference towards me I no problem with Cathy and my whole family never had one was very disappointed

Frequently flyer number should and could have been put on at the time of booking as I gave the number when booking.

Very attentive crews Flight was very smooth and safe Only little disappointment was the slight delay of departure (~30 minutes ) which rarely happen with CX flights

Not at all satisfactory. I had stomach upsets after taking food. Quality of Asian vegetarian meal was awful. Further there was no snacks/ fruits/ biscuits available as in between snacks.. only peanuts and pitzels.. except courteous staff rest of my experience was far from satisfactory

Staff was very courteous. Plane was clean and quite spacious even in the last rows. Veg food could have been better.

Later on, when there was no more bottled water, the water we received had a strong chlorine/disinfectant odor. On my flight from Hong Kong to Los Angeles, there was a male flight attendant who had a mean attitude throughout the whole trip, and he was very impatient during meal service “Furthermore, we purchased a Hong Kong SIM card as part of our flight package, but we received no instructions—neither by email nor SMS—on how to activate or use it. Consequently, we were unable to use the service at all. We request a full refund, as this appears to be a deceptive charge

Everything and everyone were excellent except for the charge for using WiFi; there was no escape from this fee except to not use it.

The crew and the food were excellent. The plane was kept quite clean.

Crew were not engaging. Only engaged if requested. Food taste was mediocre

My seat had many issues. First the chair was broken where reclining was difficult. My usb plug was also broken so charging was impossible.

My flight time was changed without any notification to me which ruined my time sensitive plans so I ended up completely changing my travel plans and no reimbursement.

No screens or meal options. Freezing cold. Dirty seats. Left late.

I liked that my son and I were reseated next to each other (we had different bookings). I liked that it was a directg flight and mostly on time. I liked that you provided pillows and blankets. Flight attendants were generally courteous. The messaging through wifi did not work well. The food was not good. Seats are very narrow and I felt slightly claustraphobic in the window seat.

Some crew were unfriendly or in some cases just straight up rude.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

United Airline crews were very friendly and very attentive. 12 hours flight was gone like in a shorter one.

Flight itself excellent, but delayed so missed connection & got to destination 2 hrs later

Due to cancellation of connecting flight (Lufthansa) I didn’t fly with United

It was a red-eye, but the flight felt surprisingly quick. The seats were very comfortable, and that made resting much easier. I also want to thank the gentleman seated next to me, who graciously moved so my mom could sit beside me. We slept almost the entire way. The cabin crew was respectful in not disturbing us, while also being courteous and professional throughout. Thank you, United.

Boarding was again a "free for all". We were boarding group 4, and almost the entire plane was able to board before us. It's a shame that someone who follows the rules, gets the short end of the stick. Not fair.

Everything you need to know for your flight from San Francisco to Singapore

Information on your arrival and departure airports