Find Cheap Flights from San Francisco to Ko Samui (SFO - USM)

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Good to Know

Average Price:
$1531
(avg. price over the last 2 weeks)
Good Deal:
$1000
or less (round trip)

When to Book Flights from San Francisco to Ko Samui

Flight prices as travel date approaches
-1 day
-2 days

Top tips for Finding a Cheap Flight

Looking for a cheap flight? 25% of our users found flights on this route for $1000 or less.
The cheapest flight from San Francisco to Ko Samui was found 51 days before departure, on average.
Book at least 1 week before departure in order to get a below-average price.
Morning departure is around 18% cheaper than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for Booking San Francisco to Ko Samui Flights

How long does a flight from San Francisco to Ko Samui take?
An average nonstop flight takes 19h 40m, covering a distance of 8178 miles.
Which airlines provide the cheapest flights from San Francisco to Ko Samui?
In the past 3 days, the cheapest round-trip tickets were found on Multiple Airlines ($743), EVA Air ($872) and Singapore Airlines ($903).
Do I need a passport to fly between San Francisco and Ko Samui?
Yes.

Book cheap flights from San Francisco to Ko Samui (round-trip)

Airports
Origin
San Francisco
$743
only
$743
Destination
Ko Samui
$743
only
$743
Sun, Mar 4
SFO
USM
31h 40m
Wed, Mar 14
USM
SFO
35h 50m
Trip: 10 days
Overall 0.0 Poor
Based on 0 reviews
Thu, Mar 1
SFO
USM
25h 10m
Sun, Mar 11
USM
SFO
25h 25m
Trip: 11 days
8.6ExcellentShow reviews
Overall 8.6 Excellent
Based on 3789 reviews
Boarding
8.8
Comfort
8.6
Crew
8.9
Entertainment
8.4
Food
8.3
SGN
TPE
Excellent 10.0

NO SURPRISES ALWAYS GOOD FLIGHTS

TPE
SFO
Excellent 9.3

First time riding this airline on my trip to Thailand and back. My friend always raved about it and now I see why. They do above and beyond for every customer. The flight attendants are prompt, kind and very hard working. Wish I could fly with EVA air more often.

TPE
SEA
Excellent 10.0

Service and landing were great.

Too cramped and people who coughed the whole flight which isn’t airline’s fault. Wine wasn’t good at all.

LAX
TPE
Excellent 8.0

What I like the most is the smooth landing of the plane.

SFO
TPE
Good 7.6

Food was pretty good for airline food.

Not a very good variety of movies. Flight attendants pretty Good but not friendly at all. Rarely smiled and usually didn’t speak unless you were asking for something. Had to get up for water during the flight. Seemed like quite awhile between distribution but I may have missed them while sleeping.

Wed, May 2
SFO
USM
33h 35m
Mon, May 14
USM
SFO
37h 45m
Trip: 13 days
8.7ExcellentShow reviews
Overall 8.7 Excellent
Based on 2212 reviews
Overall
8.8
Boarding
8.9
Comfort
8.6
Crew
9.0
Entertainment
8.8
Food
8.4
FRA
JFK
Excellent 8.6

Ontime, airline stewards were excellent and tv entertainment very good

Nothing

BOM
SIN
Okay 5.3

Priority line for boarding and security, reclining seats, foot stand

Priority boarding not available in India, food and food choices and lackluster service

HKG
SFO
Excellent 10.0

the first class seats from HK to SFO, IFE, service, dom perignon, red wine, excellent attention, greeted personally by four of flight team, provided flight details personally. Im 6'0" so the bed was a little short. it was simply a wonderful experience.

the IFE is not touch screen and pausing on the hand held was fidgety, but a huge 24 inch screen and beautiful.

MNL
SIN
Good 7.0

Everyone was cold asking for blankets it was freezing on that plane only major complaint, I love the airlines, the flight attendants are lovely and gracious, they really do try. Such a nice treat after flying United airlines all year!

Too cold

HKG
SFO
Good 7.0

Good crew service

poor boarding arrangement. passenger did not follow the boarding group arrangement boarding the plane.

Fri, May 4
SFO
USM
40h 05m
Tue, May 15
USM
SFO
31h 20m
$1019
Trip: 12 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 458 reviews
Boarding
7.5
Comfort
7.3
Crew
7.8
Entertainment
6.9
Food
6.9
DPS
HKG
Excellent 10.0

Very simple and efficient. Enjoyed flying with Hong Kong Airlines

PEK
HKG
Good 7.0

International flight provides better leg room and food was good. Movies were short on selection compared to other Airlines.

I had a 5 hour layover and there were laptops in my luggage. They waited until I landed 14 hours later to ask for permission to look in bag and then put on plane. Disappointing.

HKG
YVR
Okay 5.0

Really need to work on the food. The entertainment can't be on the iPad, there's not much space already. I was trying to get an isle seat or upgrade to premium, but I can't do that from my original flight from bkk to hkg. When I arrived from hkg they told me to go to the gate. There was an isle seat available on the flight but no one at any of the counters could help me change it. Seriously frustrating. Stick to Eva,Cathay,china Air lines in the future.

BKK
HKG
Mediocre 2.0

Worst flight of my life. Really was screwed over by delays that could have been avoided.

PEK
HKG
Excellent 9.0

Tons of room (I am 6'4), excellent food, wonderful service

Very little to choose from in the in flight entertainment system and they left my luggage behind in Beijing. Despite promises that it would be delivered to my hotel in the airport the next morning, I had to go back to the airport twice in order to retrieve it as no one could find it the first time.

Mon, Feb 26
SFO
USM
19h 40m
Wed, Mar 14
USM
SFO
24h 20m
$1475
Trip: 16 days
8.1ExcellentShow reviews
Overall 8.1 Excellent
Based on 3813 reviews
Overall
8.1
Boarding
8.1
Comfort
7.9
Crew
8.4
Entertainment
8.2
Food
7.7
HKG
ORD
Okay 5.3

The flight was delayed for one hour.

HKG
EWR
Excellent 9.3

Great crew and spacey seating.

EWR
HKG
Mediocre 3.0

Movie choices.

The weather delay was understandable - boarded flight 19 hours later than scheduled, but then there was a problem with the engine, that delayed us further by 5 hours. We had to sit on the aircraft for 5 extra hours on top of what was already an extra long flight. 21 hours on the plane - and there was no coffee! Being on a plane for that long, you should be able to get a cup of coffee. Staff seemed annoyed as well and were overall a bit rude. Wine tasted like acid.

HKG
SFO
Good 7.0

I requested special meal It wasn’t good and I got the food poison which make me sick.

HKG
LAX
Excellent 9.3

The flight attendants we're so kind and polite. They worked very hard to be helpful to everyone on the plane.

Sun, Mar 4
SFO
USM
31h 40m
Wed, Mar 14
USM
SFO
35h 50m
Trip: 10 days
Overall 0.0 Poor
Based on 0 reviews
Thu, Mar 8
SFO
USM
52h 05m
Tue, Mar 20
USM
SFO
28h 50m
Trip: 12 days
Overall 0.0 Poor
Based on 0 reviews
Fri, Mar 9
SFO
USM
28h 05m
Tue, Mar 20
USM
SFO
28h 50m
Trip: 11 days
Overall 0.0 Poor
Based on 0 reviews
Thu, May 3
SFO
USM
31h 25m
Sun, May 13
USM
SFO
37h 45m
Trip: 11 days
8.7ExcellentShow reviews
Overall 8.7 Excellent
Based on 2212 reviews
Overall
8.8
Boarding
8.9
Comfort
8.6
Crew
9.0
Entertainment
8.8
Food
8.4
BOM
SIN
Excellent 8.6

Friendly, smiling staff, ever happy to help, nice food

Seats on the A380 upper deck economy are too uncomfortable, couldn't relax at all during the 5h red-eye to Singapore

BOM
SIN
Okay 5.3

Priority line for boarding and security, reclining seats, foot stand

Priority boarding not available in India, food and food choices and lackluster service

IAH
MAN
Excellent 10.0

I’ve flown with a lot of airlines in every class. This was an economy class flight and still the food was better than I’ve received in business class on American. The seat was comfortable, the entertainment options varied and extensive and the cabin team were amazing. They clean the bathrooms between uses. Seriously how do other airlines still exist?

No free upgrade? ;-). But that’s unreasonable. I love this airline having not flown with them for 4 years I don’t understand why!

JFK
FRA
Excellent 9.3

There was nothing to complain about..a very friendly staff, departure on time !

No newspapers and magazines on board !

IAH
SIN
Excellent 10.0

Food wasn't the greatest but it was adequate considering shirt trip

Sun, May 6
SFO
USM
40h 05m
Tue, May 15
USM
SFO
31h 20m
$1019
Trip: 10 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 458 reviews
Boarding
7.5
Comfort
7.3
Crew
7.8
Entertainment
6.9
Food
6.9
LAX
HKG
Excellent 8.0

Great value, comfortable new aircraft, and good entertaining system.

The in-flight boardcasting voice was dull, not clear, and not proper toning in Cantonese, Mandarin, and English. Wifi was not working for my phone.

BKK
HKG
Mediocre 2.0

Worst flight of my life. Really was screwed over by delays that could have been avoided.

AKL
HKG
Good 6.3

good leg room, comfortable seats

very limited entertainment. There was only 2 things my 6 year old could watch - either that or our system wasnt working properly. I asked crew for help but they just said that different flights had different entertainment.

HKG
YVR
Okay 5.0

Really need to work on the food. The entertainment can't be on the iPad, there's not much space already. I was trying to get an isle seat or upgrade to premium, but I can't do that from my original flight from bkk to hkg. When I arrived from hkg they told me to go to the gate. There was an isle seat available on the flight but no one at any of the counters could help me change it. Seriously frustrating. Stick to Eva,Cathay,china Air lines in the future.

DPS
HKG
Excellent 10.0

Very simple and efficient. Enjoyed flying with Hong Kong Airlines

Sat, Mar 3
SFO
USM
52h 05m
Sun, Mar 11
USM
SFO
64h 45m
Trip: 9 days
Overall 0.0 Poor
Based on 0 reviews
Mon, Apr 30
SFO
USM
33h 35m
Mon, May 14
USM
SFO
37h 45m
Trip: 15 days
8.7ExcellentShow reviews
Overall 8.7 Excellent
Based on 2212 reviews
Overall
8.8
Boarding
8.9
Comfort
8.6
Crew
9.0
Entertainment
8.8
Food
8.4
MNL
SIN
Good 7.0

Everyone was cold asking for blankets it was freezing on that plane only major complaint, I love the airlines, the flight attendants are lovely and gracious, they really do try. Such a nice treat after flying United airlines all year!

Too cold

BOM
SIN
Excellent 8.6

Friendly, smiling staff, ever happy to help, nice food

Seats on the A380 upper deck economy are too uncomfortable, couldn't relax at all during the 5h red-eye to Singapore

FRA
JFK
Excellent 8.6

Ontime, airline stewards were excellent and tv entertainment very good

Nothing

BOM
SIN
Okay 5.3

Priority line for boarding and security, reclining seats, foot stand

Priority boarding not available in India, food and food choices and lackluster service

IAH
MAN
Excellent 10.0

I’ve flown with a lot of airlines in every class. This was an economy class flight and still the food was better than I’ve received in business class on American. The seat was comfortable, the entertainment options varied and extensive and the cabin team were amazing. They clean the bathrooms between uses. Seriously how do other airlines still exist?

No free upgrade? ;-). But that’s unreasonable. I love this airline having not flown with them for 4 years I don’t understand why!

Tue, May 1
SFO
USM
31h 25m
Mon, May 14
USM
SFO
37h 45m
Trip: 14 days
8.7ExcellentShow reviews
Overall 8.7 Excellent
Based on 2212 reviews
Overall
8.8
Boarding
8.9
Comfort
8.6
Crew
9.0
Entertainment
8.8
Food
8.4
SIN
CHC
Good 7.0

Excellent crew services

Entertainment system is rather tired for today’s standard for first tier airlines, in particular the headphone jacks which may not work from wear & tear. It’s a hit & miss whether the sound works or not. Obviously mine didn’t on one side this time. Very frustrating if you are on a long flight and there’s nothing you can do if the flight is full.

IAH
SIN
Excellent 10.0

Food wasn't the greatest but it was adequate considering shirt trip

HKG
SFO
Excellent 10.0

the first class seats from HK to SFO, IFE, service, dom perignon, red wine, excellent attention, greeted personally by four of flight team, provided flight details personally. Im 6'0" so the bed was a little short. it was simply a wonderful experience.

the IFE is not touch screen and pausing on the hand held was fidgety, but a huge 24 inch screen and beautiful.

FRA
JFK
Excellent 8.6

Ontime, airline stewards were excellent and tv entertainment very good

Nothing

BOM
SIN
Excellent 8.6

Friendly, smiling staff, ever happy to help, nice food

Seats on the A380 upper deck economy are too uncomfortable, couldn't relax at all during the 5h red-eye to Singapore

Thu, May 3
SFO
USM
30h 35m
Mon, May 14
USM
SFO
32h 25m
Trip: 12 days
Overall 0.0 Poor
Based on 0 reviews
Mon, Apr 30
SFO
USM
33h 35m
Thu, May 17
USM
SFO
25h 20m
Trip: 18 days
8.7ExcellentShow reviews
Overall 8.7 Excellent
Based on 2212 reviews
Overall
8.8
Boarding
8.9
Comfort
8.6
Crew
9.0
Entertainment
8.8
Food
8.4
SIN
SFO
Excellent 8.0

Stewardesses were a bit rude

MNL
SIN
Good 7.0

Everyone was cold asking for blankets it was freezing on that plane only major complaint, I love the airlines, the flight attendants are lovely and gracious, they really do try. Such a nice treat after flying United airlines all year!

Too cold

HKG
SFO
Excellent 10.0

the first class seats from HK to SFO, IFE, service, dom perignon, red wine, excellent attention, greeted personally by four of flight team, provided flight details personally. Im 6'0" so the bed was a little short. it was simply a wonderful experience.

the IFE is not touch screen and pausing on the hand held was fidgety, but a huge 24 inch screen and beautiful.

BOM
SIN
Okay 5.3

Priority line for boarding and security, reclining seats, foot stand

Priority boarding not available in India, food and food choices and lackluster service

FRA
JFK
Excellent 8.6

Ontime, airline stewards were excellent and tv entertainment very good

Nothing

Tue, May 1
SFO
USM
31h 25m
Thu, May 17
USM
SFO
25h 20m
Trip: 17 days
8.7ExcellentShow reviews
Overall 8.7 Excellent
Based on 2212 reviews
Overall
8.8
Boarding
8.9
Comfort
8.6
Crew
9.0
Entertainment
8.8
Food
8.4
MNL
SIN
Good 7.0

Everyone was cold asking for blankets it was freezing on that plane only major complaint, I love the airlines, the flight attendants are lovely and gracious, they really do try. Such a nice treat after flying United airlines all year!

Too cold

BOM
SIN
Excellent 8.6

Friendly, smiling staff, ever happy to help, nice food

Seats on the A380 upper deck economy are too uncomfortable, couldn't relax at all during the 5h red-eye to Singapore

FRA
JFK
Excellent 8.6

Ontime, airline stewards were excellent and tv entertainment very good

Nothing

IAH
SIN
Excellent 10.0

Food wasn't the greatest but it was adequate considering shirt trip

SFO
SIN
Excellent 8.0

Service and food

Thu, Mar 29
SFO
USM
29h 05m
Sat, Apr 7
USM
SFO
59h 15m
Trip: 10 days
Overall 0.0 Poor
Based on 0 reviews
Wed, Feb 28
SFO
USM
29h 45m
Wed, Mar 14
USM
SFO
24h 20m
$1475
Trip: 14 days
8.1ExcellentShow reviews
Overall 8.1 Excellent
Based on 3813 reviews
Overall
8.1
Boarding
8.1
Comfort
7.9
Crew
8.4
Entertainment
8.2
Food
7.7
HKG
LAX
Excellent 9.3

The flight attendants we're so kind and polite. They worked very hard to be helpful to everyone on the plane.

HKG
SFO
Good 7.0

I requested special meal It wasn’t good and I got the food poison which make me sick.

EWR
HKG
Mediocre 3.0

Movie choices.

The weather delay was understandable - boarded flight 19 hours later than scheduled, but then there was a problem with the engine, that delayed us further by 5 hours. We had to sit on the aircraft for 5 extra hours on top of what was already an extra long flight. 21 hours on the plane - and there was no coffee! Being on a plane for that long, you should be able to get a cup of coffee. Staff seemed annoyed as well and were overall a bit rude. Wine tasted like acid.

CEB
HKG
Excellent 8.0

The usual Cathay Pacific service

On time departure and arrival.

HKG
YVR
Good 6.0

We were lucky the flight wasn't full. Had decent leg room using three seats for the two of us.

Had entertainment without downloading the WestJet app and/or payoff for stuff.

Wed, May 2
SFO
USM
33h 35m
Thu, May 17
USM
SFO
25h 20m
Trip: 16 days
8.7ExcellentShow reviews
Overall 8.7 Excellent
Based on 2212 reviews
Overall
8.8
Boarding
8.9
Comfort
8.6
Crew
9.0
Entertainment
8.8
Food
8.4
BOM
SIN
Excellent 8.6

Friendly, smiling staff, ever happy to help, nice food

Seats on the A380 upper deck economy are too uncomfortable, couldn't relax at all during the 5h red-eye to Singapore

SIN
SFO
Excellent 8.0

Stewardesses were a bit rude

SIN
CHC
Good 7.0

Excellent crew services

Entertainment system is rather tired for today’s standard for first tier airlines, in particular the headphone jacks which may not work from wear & tear. It’s a hit & miss whether the sound works or not. Obviously mine didn’t on one side this time. Very frustrating if you are on a long flight and there’s nothing you can do if the flight is full.

HKG
SFO
Excellent 10.0

the first class seats from HK to SFO, IFE, service, dom perignon, red wine, excellent attention, greeted personally by four of flight team, provided flight details personally. Im 6'0" so the bed was a little short. it was simply a wonderful experience.

the IFE is not touch screen and pausing on the hand held was fidgety, but a huge 24 inch screen and beautiful.

HKG
SFO
Good 7.0

Good crew service

poor boarding arrangement. passenger did not follow the boarding group arrangement boarding the plane.

Thu, Feb 1
SFO
USM
29h 35m
Tue, Feb 6
USM
SFO
38h 35m
Trip: 6 days
Overall 0.0 Poor
Based on 0 reviews
Show more results

San Francisco to Ko Samui Flight Information

Flights Arrive in Ko Samui
Flights Depart from San Francisco
Flight Price $743
Distance 8178 miles
Airlines EVA Air, Singapore Airlines, Hong Kong Airlines, Cathay Pacific
*
Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

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At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

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Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

If you have more questions or if you have a bad price to report to us,
please send us an and someone from our team will get back to you promptly.

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The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.