Find Cheap Flights from Seattle/Tacoma Intl to Singapore Changi (SEA - SIN)

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Good to Know

Low Season:
October
Best time to beat the crowds
3%
expected price decrease
High Season:
December
Most popular time to fly
3%
expected price increase
Average Price:
$1505
(avg. price over the last 2 weeks)
Good Deal:
$851
or less (round trip)

When to Book Flights from Seattle/Tacoma Intl to Singapore Changi

Average price per month
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 $850 or less.
The cheapest flight from Seattle/Tacoma Intl to Singapore Changi was found 52 days before departure, on average.
Book at least 3 weeks before departure in order to get a below-average price.
Morning departure is around 11% 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 Seattle/Tacoma Intl to Singapore Changi Flights

How long does a flight from Seattle/Tacoma Intl to Singapore Changi take?
An average nonstop flight takes 19h 55m, covering a distance of 8065 miles.
Which airlines provide the cheapest flights from Seattle/Tacoma Intl to Singapore Changi?
In the past 3 days, the cheapest round-trip tickets were found on Air China ($503), Multiple Airlines ($638) and XiamenAir ($675).
Do I need a passport to fly between Seattle/Tacoma Intl and Singapore Changi?
Yes.
What’s the cheapest day of the week to fly Seattle/Tacoma Intl to Singapore Changi?
For Seattle/Tacoma Intl to Singapore Changi, Monday is the cheapest day to fly on average and Tuesday is the most expensive. Flying from Singapore Changi back to Seattle/Tacoma Intl, the best deals are generally found on Sunday, with Thursday being the most expensive.

Book cheap flights from Seattle/Tacoma Intl to Singapore Changi (round-trip)

Airports
Origin
Seattle
$503
only
$503
Destination
Singapore
$503
only
$503
Mon, Apr 30
SEA
SIN
30h 00m
Mon, May 7
SIN
SEA
33h 52m
Trip: 8 days
6.3GoodShow reviews
Overall 6.3 Good
Based on 3750 reviews
Overall
6.4
Boarding
6.6
Comfort
6.4
Crew
6.8
Entertainment
5.9
Food
6.0
JFK
PEK
Mediocre 2.0

nothing

very irresponsible! & no English

PEK
JFK
Mediocre 2.0

Nothing.

The flight was canceled but United and delta were still flying to New York. Air China was not working with them to help us. The earliest next flight was five days later...... their staff were extremely unprofessional. I asked to update to business class. One staff told me it was 1300usd, another one told me it was 3600usd, and one told me it was 10,000 usd???

PEK
NRT
Good 6.3

Middle of the roax

To tight of a seat for a man who is 6'3 275 lbs. Shear brutality

PEK
SFO
Mediocre 2.0

So bad customer service

IAD
PEK
Good 7.3

Our luggage was delayed and we didn't have clean clothes for the first day.

Wed, Apr 4
SEA
SIN
35h 55m
Thu, Apr 12
SIN
SEA
37h 05m
Trip: 9 days
Overall 0.0 Poor
Based on 0 reviews
Fri, May 4
SEA
SIN
43h 05m
Thu, May 17
SIN
SEA
40h 05m
Trip: 14 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 306 reviews
Overall
7.0
Boarding
7.1
Comfort
7.1
Crew
7.5
Entertainment
6.7
Food
6.8
XMN
LAX
Good 6.0

food is great

check in time is too long (about 1 hour)

YVR
XMN
Excellent 10.0

Seat were comfortable , staff friendly

The long layover

XMN
YVR
Excellent 8.6

crew provide excellent and attentive service. food is good

food could be better

PEK
XMN
Excellent 10.0

I like the price but best of all the service and the attention given to us by all staff members.

Everything was great!

BKK
XMN
Excellent 8.6

Nice wide seats, well run flight. Lots of food served, though very mixed quality. The unfortunate experiences described in the negatives of this review, do not repeat on the return flight.

In the fine print is the fact that the flight includes a stop in Shenzen. On the outbound flight this was a nightmare experience with Chinese immigration. Exhausted from a 14 hour flight, passengers had their passports taken away; were put through a bizarre 45 minute finger printing process using machines that did not work; and then left to wait for an hour or more with no information. The continuation flight was in another part of the airport - a very long walk; and it turned out not to be at the departing gate that was displayed on the monitors. We arrived at the indicated (wrong) gate with no guidance. Very nearly missed the continuation flight. Once in Xiamen, our arrival was late enough that the second floor of the airport was closed. There were no ATMs on the first floor; no way to get the Chinese cash needed to take a taxi to the airport. Fortunately a kind citizen agreed to exchange some cash, using mental calculations and sign language about the exchange rate.

Sun, Jan 28
SEA
SIN
32h 00m
Tue, Feb 6
SIN
SEA
30h 21m
Trip: 10 days
8.7ExcellentShow reviews
Overall 8.7 Excellent
Based on 2214 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

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.

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

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

IAH
SIN
Excellent 10.0

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

Mon, Feb 19
SEA
SIN
28h 35m
Wed, Feb 28
SIN
SEA
23h 13m
Trip: 10 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 53874 reviews
Overall
7.2
Boarding
7.4
Comfort
6.9
Crew
7.7
Entertainment
6.5
Food
6.4
ORD
YUL
Mediocre 2.0

the comped hotel

Improper handling of situation. There was flight scheduled later, but CS agent kept jerking us around. By the time I reached the United counter, the next flight was full. My total flight time was 36 hours. I still can’t believe that the pilot was missing. Worse yet, the agent at the gate could have made things much easier instead of telling everyone that a pilot was on his way to the airport.

MCO
IAH
Mediocre 3.0

Flight was cancelled on our way back home from Gudalajara, was speaking to a representative for almost 2 hours to get me on the next flight the flight representative forgot to put me on hold and told everyone how rude i was, i was not rude i was just trying to get home. The representative couldn’t help me so i asked to be transferred to a manager, after 2 hours i was transferred and the manager hung the phone up. Long story short i called back spoke to another manager Yana and she was the rudest lady ever! She basically told me for waiting to long i will have to be placed on a flight 2 days after my cancellation flight. I started to cry because i needed to be home and she basically did not care so i took the date. Never again and i will warn everyone about this airline and their customer service!

IAD
AMS
Mediocre 2.0

I didn't go. It was $400 just to change my name on my ticket from my maiden name to my married name. I am so disappointed and will never use Kayak again!!!

IAH
PNS
Mediocre 2.0

delayed in piecemeal by 6 hrs before move to another gate. than mechanical delay and then cancelled. Arrived at hotel after midnight without food or drink. Substitute flight was next day noon - original offer was for late afternoon flight! That flight had poor service. Attendant dawdled so there were no drinks served.

ORD
IND
Okay 4.6

Crew was very kind and apologetic for delay.

Delayed 2 hours and forced to deboard when I can drive in 3 hours.

Wed, Jun 13
SEA
SIN
19h 55m
Thu, Jun 21
SIN
SEA
22h 31m
Trip: 9 days
8.7ExcellentShow reviews
Overall 8.7 Excellent
Based on 3000 reviews
Overall
8.8
Boarding
8.9
Comfort
8.5
Crew
9.1
Entertainment
8.4
Food
8.3
NRT
LAX
Okay 5.6

Staff very friendlym Flight was on time.

There is not entertainment at the plane even though is a international flight in a not low cost airline. The space between seat is quite small.

NRT
ORD
Excellent 9.3

Customer service on ANA was as stellar as always.

Chairs are uncomfortably small for an international flight. Was fairly surprised since it's such a long flight.

JFK
NRT
Excellent 8.6

Comfortable seats, excellent entertainment system (although lack of movie choices this time around), crew is attentive as usual, and the food is not bad for airplane food. Smooth traveling.

If anything, it was simply the lack of movie choices but I guess it wasn't a good year for movies.

NRT
LAX
Excellent 9.0

The crew is attentive and kind, the promptness is the airline, they aren’t afraid to serve you top notch food and dessert

The only thing that soured my trip was on the way back, it was a passenger who was just way overboard disgusting. First of all he takes off his shoes and then his socks and crosses his legs so his barefoot is right next to my tray table. Then he proceeds to unbutton his pants and unbuckle his belt. Reaches down into his nethers and takes a good whiff of his hand. This passenger continually kept encroaching into my seat, either sitting on a portion of my leg or putting his shoulder over my shoulder, even at one point used me as lean on. It was a 9 hour flight of misery... I was definitely uncomfortable for majority of that flight due to the passenger in 40A on flight NH176

LAX
NRT
Excellent 10.0

The airline was late in arriving for my translate flight but when I got to the airport in Narita everything was taken care excellent ground service

The flight attendants gave me the most beautiful hospitality hope you keep up the good job this was my third time around using ANA

Mon, Mar 12
SEA
SIN
45h 15m
Tue, Mar 20
SIN
SEA
32h 58m
Trip: 9 days
6.3GoodShow reviews
Overall 6.3 Good
Based on 3750 reviews
Overall
6.4
Boarding
6.6
Comfort
6.4
Crew
6.8
Entertainment
5.9
Food
6.0
PEK
JFK
Mediocre 2.0

Nothing.

The flight was canceled but United and delta were still flying to New York. Air China was not working with them to help us. The earliest next flight was five days later...... their staff were extremely unprofessional. I asked to update to business class. One staff told me it was 1300usd, another one told me it was 3600usd, and one told me it was 10,000 usd???

JFK
PEK
Good 7.0

I was able to sleep most of the flight

The people next to me were annoying and smelled awful.

JFK
PEK
Mediocre 2.0

nothing

cancelled last minute, rescheduled for the next flight three days later

IAD
PEK
Good 7.3

Our luggage was delayed and we didn't have clean clothes for the first day.

ICN
PEK
Okay 5.3

The flight crew was great. Very pleasant and helpful.

They lost my luggage. Also the plane left Seoul almost an hour late. The plane itself was very old, so no electronic devices of any kind were allowed, some of the seat controls didnt work, and there were no private video screens. And this was in business class.

Sat, Mar 10
SEA
SIN
44h 22m
Fri, Mar 23
SIN
SEA
32h 58m
Trip: 13 days
6.3GoodShow reviews
Overall 6.3 Good
Based on 3750 reviews
Overall
6.4
Boarding
6.6
Comfort
6.4
Crew
6.8
Entertainment
5.9
Food
6.0
PEK
NRT
Good 6.3

Middle of the roax

To tight of a seat for a man who is 6'3 275 lbs. Shear brutality

PVG
SJC
Mediocre 3.3

I will never fly Air China again.

JFK
PEK
Good 7.0

I was able to sleep most of the flight

The people next to me were annoying and smelled awful.

PEK
JFK
Mediocre 2.0

Nothing.

The flight was canceled but United and delta were still flying to New York. Air China was not working with them to help us. The earliest next flight was five days later...... their staff were extremely unprofessional. I asked to update to business class. One staff told me it was 1300usd, another one told me it was 3600usd, and one told me it was 10,000 usd???

HFE
PEK
Okay 4.0

no in flight entertainment, food was horrible

Tue, Jul 17
SEA
SIN
21h 35m
Tue, Jul 31
SIN
SEA
25h 51m
Trip: 15 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 53874 reviews
Overall
7.2
Boarding
7.4
Comfort
6.9
Crew
7.7
Entertainment
6.5
Food
6.4
AUS
IAH
Mediocre 2.6

flights delayed overall

service. flights were delayed and they said there was nothing they could do

IAD
AMS
Mediocre 2.0

I didn't go. It was $400 just to change my name on my ticket from my maiden name to my married name. I am so disappointed and will never use Kayak again!!!

IAD
CDG
Excellent 10.0

Got a window seat and had an amazing crew. Everything went smoothly! Dinner and breakfast served!

Everything was perfect!

DEN
FLL
Excellent 10.0

Phone charging outlet under my seat didn't work.

ORD
YUL
Mediocre 2.0

the comped hotel

Improper handling of situation. There was flight scheduled later, but CS agent kept jerking us around. By the time I reached the United counter, the next flight was full. My total flight time was 36 hours. I still can’t believe that the pilot was missing. Worse yet, the agent at the gate could have made things much easier instead of telling everyone that a pilot was on his way to the airport.

Mon, Feb 12
SEA
SIN
24h 52m
Fri, Feb 16
SIN
SEA
23h 13m
Trip: 5 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 53874 reviews
Overall
7.2
Boarding
7.4
Comfort
6.9
Crew
7.7
Entertainment
6.5
Food
6.4
PVG
ORD
Okay 4.6

Entertainment, and leg space.

Full plane, long wait to use lavatory. Crew was good, but should have upped their game under the circumstances, especially with regards to keeping the lavatory clean. The noodles for breakfast turned out to be porridge, and went straight to the waste basket.

BOI
DEN
Mediocre 3.6

I found the reason for being late to be questionable They said heavy snow but as i flew in i looked out the window and saw all roads nicely cleared That does not happen in 3 hours

They did not get my liggage to the connecting flight And here i am in Ukraine with no winter clothes at 7 below 3 days later

MCO
IAH
Mediocre 3.0

Flight was cancelled on our way back home from Gudalajara, was speaking to a representative for almost 2 hours to get me on the next flight the flight representative forgot to put me on hold and told everyone how rude i was, i was not rude i was just trying to get home. The representative couldn’t help me so i asked to be transferred to a manager, after 2 hours i was transferred and the manager hung the phone up. Long story short i called back spoke to another manager Yana and she was the rudest lady ever! She basically told me for waiting to long i will have to be placed on a flight 2 days after my cancellation flight. I started to cry because i needed to be home and she basically did not care so i took the date. Never again and i will warn everyone about this airline and their customer service!

AUS
IAH
Mediocre 2.6

flights delayed overall

service. flights were delayed and they said there was nothing they could do

IAD
CDG
Excellent 10.0

Got a window seat and had an amazing crew. Everything went smoothly! Dinner and breakfast served!

Everything was perfect!

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Seattle/Tacoma Intl to Singapore Changi Flight Information

Flights Arrive in Singapore Changi
Flights Depart from Seattle/Tacoma Intl
Flight Price $503
Distance 8065 miles
Airlines Air China, XiamenAir, Singapore Airlines, United, ANA
*
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.

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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.