HKG - SFO

S$ 528 Find Cheap Flights from Hong Kong to San Francisco – Compare and Save

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1 adult, Economy, 0 bags

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Everything you should know

Cheapest return flight
S$ 916
Typical prices: S$ 893-S$ 1,331
United Airlines
Fri 7-12Sun 15-4
HKG - SFO • Direct
Cheapest direct flights
S$ 1,152
Typical prices: S$ 957-S$ 1,487
United Airlines
Sat 24-11Sat 8-12
HKG - SFO • Direct
Advice from real travellers
For Cathay Pacific, book direct; third-party apps may not show itinerary details.
On United, recheck gate updates and bring snacks; cabins can feel cold.
Expert advice
+1
Expert advice
+1
Direct flights
You can fly direct with Cathay Pacific and United Airlines. Average duration is 12h 18m
Direct flights
+1
Direct flights
+1
Avoid delays
Most punctual • 86% on-time
Best time • Fewest delays
Insights
Insights
When to book
in advance
Our data shows that travellers who book at least 13 weeks in advance save around 22% compared to booking last minute.
Insights
Insights
When to travel
Cheapest • 16% price drop
Most popular
Good to know
+1
Good to know
+1
Top stopover airports
Cheapest • Avg S$ 950 (return)
Shortest trip • 17h 10m (one-way)
Insights
Insights
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We hope you enjoy your trip to San Francisco!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Hong Kong to San Francisco (HKG-SFO)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Hong Kong to San Francisco

Mon, 7 Dec - Wed, 14 Apr
United Airlines Logo
22:30 - 18:55HKG  Hong Kong Intl-SFO San Francisco
12h 25mdirect
United Airlines Logo
08:14 - 05:40SFO  San Francisco-HKG Hong Kong Intl
30h 26m2 stops Seattle/Tacoma Intl Los Angeles
S$ 916United Airlines
Tue, 16 Mar - Thu, 1 Apr
Philippine Airlines Logo
19:05 - 20:45HKG  Hong Kong Intl-SFO San Francisco
16h 40m1 stop Manila Ninoy Aquino Intl
Philippine Airlines Logo
00:30 - 17:00SFO  San Francisco-HKG Hong Kong Intl
25h 30m1 stop Manila Ninoy Aquino Intl
S$ 918Philippine Airlines
Tue, 24 Nov - Tue, 8 Dec
United Airlines Logo
10:35 - 07:05HKG  Hong Kong Intl-SFO San Francisco
12h 30mdirect
United Airlines Logo
08:45 - 19:15SFO  San Francisco-HKG Hong Kong Intl
18h 30m1 stop Los Angeles
S$ 921United Airlines
Wed, 18 Nov - Tue, 8 Dec
United Airlines Logo
10:35 - 07:05HKG  Hong Kong Intl-SFO San Francisco
12h 30mdirect
United Airlines Logo
06:15 - 07:00SFO  San Francisco-HKG Hong Kong Intl
32h 45m2 stops Denver Intl Los Angeles
S$ 922United Airlines
Tue, 17 Nov - Tue, 8 Dec
Asiana Airlines Logo
00:15 - 14:30HKG  Hong Kong Intl-SFO San Francisco
30h 15m1 stop Incheon Intl
Asiana Airlines Logo
23:00 - 22:40SFO  San Francisco-HKG Hong Kong Intl
31h 40m1 stop Incheon Intl
S$ 966Asiana Airlines
Fri, 20 Nov - Mon, 30 Nov
United Airlines Logo
22:30 - 18:55HKG  Hong Kong Intl-SFO San Francisco
12h 25mdirect
United Airlines Logo
16:25 - 07:00SFO  San Francisco-HKG Hong Kong Intl
22h 35m1 stop Los Angeles
S$ 981United Airlines
Tue, 24 Nov - Fri, 29 Jan
United Airlines Logo
10:35 - 07:05HKG  Hong Kong Intl-SFO San Francisco
12h 30mdirect
United Airlines Logo
06:00 - 19:15SFO  San Francisco-HKG Hong Kong Intl
21h 15m1 stop Los Angeles
S$ 986United Airlines
Fri, 20 Nov - Mon, 30 Nov
United Airlines Logo
11:25 - 12:59HKG  Hong Kong Intl-SFO San Francisco
41h 34m2 stops Los Angeles Seattle/Tacoma Intl
United Airlines Logo
23:15 - 06:45SFO  San Francisco-HKG Hong Kong Intl
15h 30mdirect
S$ 987United Airlines
Fri, 20 Nov - Mon, 30 Nov
United Airlines Logo
11:25 - 12:59HKG  Hong Kong Intl-SFO San Francisco
41h 34m2 stops Los Angeles Seattle/Tacoma Intl
United Airlines Logo
23:15 - 06:45SFO  San Francisco-HKG Hong Kong Intl
15h 30mdirect
S$ 989United Airlines
Mon, 22 Mar - Tue, 30 Mar
Philippine Airlines Logo
22:55 - 20:45HKG  Hong Kong Intl-SFO San Francisco
36h 50m1 stop Manila Ninoy Aquino Intl
Philippine Airlines Logo
00:30 - 21:25SFO  San Francisco-HKG Hong Kong Intl
29h 55m1 stop Manila Ninoy Aquino Intl
S$ 1,039Philippine Airlines
Booking Insights

Price, demand, and travel trends for Hong Kong to San Francisco flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights with more confidence.

How much is a return flight from Hong Kong to San Francisco?

Return flights from Hong Kong to San Francisco typically range from S$ 893 to S$ 1,331. The lowest price found in the past 5 days was S$ 916 on United Airlines.

What's the cheapest day of the week to fly from Hong Kong to San Francisco?

Based on deals KAYAK users found in the last 12 months, Tuesday is the cheapest day of the week to fly from Hong Kong to San Francisco. It's 5% cheaper than the average day, while Friday is the most expensive, with prices 9% higher.

What is the cheapest month to fly from Hong Kong to San Francisco?

•January is the cheapest month to fly from Hong Kong to San Francisco at S$ 869 return.
•July (S$ 1,425) and August (S$ 1,400) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 63% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from Hong Kong to San Francisco the cheapest?

Flights from Hong Kong to San Francisco are cheapest 13 weeks before departure. Booking in this window typically costs about 22% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Key details for Hong Kong to San Francisco flights

Low season

November

Cheapest flight

S$ 528
Beat the crowds with an average 38% drop in travellers.
The most popular month to fly with an average 30% increase in travellers.
One-way flight from Hong Kong to San Francisco

When to book flights from Hong Kong to San Francisco

Are your dates flexible? Find out the best times to travel from Hong Kong to San Francisco based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price

Flights from Hong Kong to San Francisco: the best tips from KAYAK users' own experiences

Insights shared by verified travellers who flew the route from Hong Kong to San Francisco 
NoelFlew with Cathay Pacific-Mar 2026
Baggage handilng make sure to report any issues, like lost or damage immidiately, even if you miss your connecting flight , they will reschedule you, but if you have a fixed schedule, report as soon as possible , happend to my recent flight march 24,2026
KaushalendraFlew with American Airlines-Apr 2026
Don’t book via third party apps for Cathay Pacific flights, they don’t recognize the itinerary and won’t be able to even view details like airport terminals or gate numbers
Verified travelerFlew with United Airlines-Feb 2026
Prepare to bring your own food & snacks on board to eat, food on plane sucks, very cold on plane
RamFlew with United Airlines-Feb 2025
Fly United. Give yourself a lot of time to get to the gate
Verified travelerFlew with United Airlines-Dec 2024
be careful of short connection time when reaching US.
Verified travelerFlew with Cathay Pacific-Sept 2024
Get there earlier if you are a transit passenger, there are stores and restaurants but we flew in almost midnight and most stores were closed. Be your own advocate and look around what other passengers are doing!
Verified travelerFlew with United Airlines-Sept 2024
Double check your boarding information in airport in time, like boarding gate, or boarding time, etc. because they might be updated.

Your Hong Kong to San Francisco flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines, and booking tips.

  • What are the earliest and latest flights from Hong Kong to San Francisco?

    These are the earliest and latest flight times available from Hong Kong to San Francisco:

    • Earliest: departs at 00:55 and lands at 13:13
    • Latest: departs at 22:30 and lands at 10:48.

    The flight takes about 12h 18m.

  • Which cabin classes can I book on flights from Hong Kong to San Francisco?

    Only Economy class is available on flights from Hong Kong to San Francisco.

  • How long is a flight from Hong Kong to San Francisco?

    A direct flight from Hong Kong to San Francisco takes 12h 18m, covering 17,896 km.

  • Do I need a passport to fly from Hong Kong to San Francisco?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a Hong Kong to San Francisco flight?

    Return flights from Hong Kong to San Francisco range from S$ 893 to S$ 1,331, with an average of S$ 1,040 over the past 12 months. Anything below S$ 893 counts as a good deal.

  • How expensive are last-minute Hong Kong to San Francisco flights?

    Last-minute fares on this route (booked within two weeks of departure) run 8% above the S$ 1,040 route average. Book 13 weeks before departure for the lowest fares.

  • How much can I save by having a stopover when flying from Hong Kong to San Francisco?

    On this route, stopover flights are cheaper than direct options on average. Stopover fares average S$ 950 return via Vancouver Intl (YVR), compared with S$ 1,181 for direct.

  • What is the standard checked bag allowance on flights from Hong Kong to San Francisco?

    There is no standard. Checked bag policies vary by airline on this route. Most carriers charge S$ 120–S$ 120 for the first checked bag in Economy. Premium fares and elite status bookings typically include a free checked bag.

  • Which aircraft model is used most often on flights from Hong Kong to San Francisco?

    The Boeing 777-300ER family is used most often on this route, operated mainly by United Airlines and Cathay Pacific. Other aircraft seen on the route include Airbus A350-900 variants.

  • How are flight departures from Hong Kong to San Francisco spread across the day?

    Night is the busiest departure period on Hong Kong to San Francisco flights, with 50% leaving in that window. Morning departures account for 25%, Afternoon flights for 25%, and Evening flights for 0%.

  • How are flight prices from Hong Kong to San Francisco looking right now?

    One-way fares from Hong Kong to San Francisco are currently lower than usual. Average one-way flight prices are about S$ 620, which is 10% below the typical average for this route.

  • Which car hire options are available at San Francisco Airport (SFO)?

    San Francisco Airport (SFO) hosts 5 major car rental companies, with daily rates starting from around S$ 81 for economy cars. Top options include:

    • Europcar
    • Thrifty
    • Dollar
    • Hertz
    • Fox

  • Which airports can I use when flying from Hong Kong to San Francisco?

    Flights from Hong Kong to San Francisco usually depart from Hong Kong Intl (HKG) and arrive at San Francisco (SFO).

  • What time of day has the fewest delays on flights from Hong Kong to San Francisco?

    Night flights have the fewest delays on this route, while morning departures tend to have the most.

  • At what point is a flight considered delayed from Hong Kong to San Francisco?

    A flight is considered delayed when it departs 15 minutes or more after its scheduled time. This is the standard used by the US Department of Transportation and most airline industry reporting. On the Hong Kong to San Francisco route, 14% of flights were delayed in the past three months, with delays averaging 1h 58m.

  • Which airports do connecting flights from Hong Kong to San Francisco pass through?

    One-stop flights from Hong Kong to San Francisco most commonly connect through:

    • Taipei City Taiwan Taoyuan Intl (TPE) – 83% of one-stop connections
    • Manila Ninoy Aquino Intl (MNL) – 8% of one-stop connections
    • Incheon Intl (ICN) – 3% of one-stop connections
    • Vancouver Intl (YVR) – 3% of one-stop connections

  • Can I save money by using flexible dates for flights from Hong Kong to San Francisco?

    Yes. Flexible dates can save you up to 13% on flights from Hong Kong to San Francisco. Tuesday is the cheapest departure day at S$ 996 return on average, while Friday is the most expensive at S$ 1,141, a difference of S$ 145.

    KAYAK's flexible dates feature shows options up to three days before and after your selected dates, making it easier to compare nearby fares.

  • Which airlines fly from Hong Kong to San Francisco?

    2 airlines operate flights between Hong Kong and San Francisco. The airlines offering direct flights on this route include:

    • Cathay Pacific
    • United Airlines

  • How much time can I save by choosing a different stopover airport from Hong Kong to San Francisco?

    Flying via Taipei City Taiwan Taoyuan Intl (TPE) gives the shortest average 1-stop total travel time of 17h 10m, compared to 17h 32m via Shanghai Pu Dong (PVG) and 18h 01m via Tokyo Narita (NRT).

  • What is the time difference between Hong Kong and San Francisco?

    San Francisco is 15 hours behind Hong Kong (Pacific Time vs Hong Kong Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in San Francisco?

    Some of the most popular sights in San Francisco are Fisherman's Wharf, InterContinental Mark Hopkins San Francisco, and Moscone Center. These are among the most viewed places in San Francisco on KAYAK.

  • Which airlines offer extra legroom and free seat selection on Hong Kong to San Francisco flights?

    Among airlines operating Hong Kong to San Francisco flights:

    • United Airlines: offers extra legroom; offers free seat selection
    • Cathay Pacific: offers free seat selection
    • Singapore Airlines: offers free seat selection
    • American Airlines: offers free seat selection
    • Asiana Airlines: offers free seat selection

    Extra legroom and free seat selection availability depends on fare class and route.

  • Which airlines include bags at no extra cost on Hong Kong to San Francisco flights?

    Here are some options for this route, based on selected ticket types and cabin classes:

    • United Airlines: a cabin bag and a checked bag in Economy class
    • Cathay Pacific: a cabin bag and a checked bag in Economy class
    • Singapore Airlines: a cabin bag and a checked bag in Economy class

    Baggage allowance can vary by ticket type, cabin class, route, and airline, so always check the fare details before booking.

Your guide to booking Hong Kong to San Francisco flights

Get tips on when to book, when to fly, and what to know before your trip.
  • If your dates are flexible, aim for a Tuesday departure and avoid flying on Friday. On this route, Tuesday flights average S$ 996, which is about S$ 145 less than Friday fares (13% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 13 weeks before you fly. On this route, that window historically saves about 22% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Hong Kong to San Francisco trip for January. Fares historically average S$ 869 return in that month – typically S$ 556 less than the most expensive month, which is July (based on the last 12 months).
  • For the best chance of arriving on time, fly with Cathay Pacific. Over the past three months, 86% of Cathay Pacific flights from Hong Kong to San Francisco arrived on time, slightly above the route average of 86%. When flights on this route arrive late, they're delayed by an average of 1h 58m, so choosing an airline with strong on-time performance can make a difference if you're on a tight schedule.
  • If you have the time, taking a 1-stop flight through Vancouver Intl Airport (YVR) can be cheaper than flying direct. The cheapest stopover option averages S$ 950 return on this route – about S$ 231 less than direct flights (based on the last 12 months).

Prefer to fly direct from Hong Kong Intl to San Francisco?

 
Find which airlines fly direct from Hong Kong Intl Airport to San Francisco Airport, which days they fly and book direct flights.

Direct departures

Hong Kong Intl to San Francisco

Monday

Cathay Pacific,United Airlines

Cathay Pacific,United Airlines

Tuesday

Cathay Pacific,United Airlines

Cathay Pacific,United Airlines

Wednesday

Cathay Pacific,United Airlines

Cathay Pacific,United Airlines

Thursday

Cathay Pacific,United Airlines

Cathay Pacific,United Airlines

Friday

Cathay Pacific,United Airlines

Cathay Pacific,United Airlines

Saturday

Cathay Pacific,United Airlines

Cathay Pacific,United Airlines

Sunday

Cathay Pacific,United Airlines

Cathay Pacific,United Airlines

See more direct flights

Direct returns

San Francisco to Hong Kong Intl

Monday

Cathay Pacific,United Airlines

Cathay Pacific,United Airlines

Tuesday

Cathay Pacific,United Airlines

Cathay Pacific,United Airlines

Wednesday

Cathay Pacific,United Airlines

Cathay Pacific,United Airlines

Thursday

Cathay Pacific,United Airlines

Cathay Pacific,United Airlines

Friday

Cathay Pacific,United Airlines

Cathay Pacific,United Airlines

Saturday

Cathay Pacific,United Airlines

Cathay Pacific,United Airlines

Sunday

Cathay Pacific,United Airlines

Cathay Pacific,United Airlines

See more direct flights

More options for your flight from Hong Kong to San Francisco

Complete your trip to San Francisco with a hotel stay or car hire