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

Search hundreds of travel sites at once for deals on flights to Singapore Changi

Sat 11/18
Sat 11/25
Any month
Compare vs. KAYAK |

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:
$1523
(avg. price over the last 2 weeks)
Good Deal:
$855
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

When looking for a cheap flight, consider that 25% of our users selected a flight on this route for $854 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 10% 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 21h 00m, 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 ($504), Multiple Airlines ($516) and XiamenAir ($685).
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, Wednesday is the cheapest day to fly on average and Saturday is the most expensive. Flying from Singapore Changi back to Seattle/Tacoma Intl, the best deals are generally found on Sunday, with Wednesday being the most expensive.

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

Airports
Origin
Seattle
$504
only
$504
Destination
Singapore
$504
only
$504
Wed, Mar 7
SEA
SIN
29h 00m
Sun, Mar 18
SIN
SEA
33h 02m
Trip: 11 days
6.3GoodShow reviews
Overall 6.3 Good
Based on 3174 reviews
Overall
6.4
Boarding
6.6
Comfort
6.4
Crew
6.8
Entertainment
5.9
Food
5.9
PEK
BKK
Okay 5.6

they should really do something about tight connections. If your first airline is only barely late, it becomes a frantic haste from hell to get thru security again and to your next airline. Security needs to inspect every element of your carryon in spite of the fact you were already screened on your previous flight. They will dump out your entire bag to inspect all contents. Extremely easy to lose important things. They confiscate all spare batteries if they only appear to be high power range regardless of what the actual voltage is.

IAD
PEK
Mediocre 2.0

They overcharged, customer support unreliable and bad service!

They overcharged, customer support unreliable and bad service!

PEK
HKT
Okay 4.3

Crew and flight were professional and courteous.

Passengers from Beijing were rude, and consistently snorting and spitting throughout the entire flight. Not just one person but everyone around us. Very disgusting and nauseating listening to that for 6+hours. I had earbuds in the entire flight and could still hear the spitting...

PEK
SYD
Excellent 8.6

Comfort and service on the plane. Lounge in Beijing was wonderful.

What you have to go through in Beijing to transit from one international flight to another. Very disorganized. I will never change planes again in Beijing after this trip. Perhaps it will be better on the way back. Business class travelers should have a special lane.

BKK
PEK
Excellent 9.6

Everything, meals were good.

Tue, Mar 13
SEA
SIN
29h 40m
Mon, Mar 19
SIN
SEA
32h 23m
Trip: 7 days
Overall 0.0 Poor
Based on 0 reviews
Fri, Nov 24
SEA
SIN
34h 50m
Wed, Nov 29
SIN
SEA
57h 10m
Trip: 6 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 213 reviews
Overall
7.1
Boarding
7.2
Comfort
7.2
Crew
7.5
Entertainment
6.6
Food
6.8
CTU
FOC
Excellent 8.6

Gave me a free hotel when I was transferring in Fuzhou. All I had to pay was the taxi fare of 20kuai. The staff are extremely nice and the food from JFK to FOC was excellent. 2 full meals and a sandwich left me pretty full.

It is difficult to get in touch with the English Customer service.

KHN
XMN
Excellent 10.0

Hostess

NRT
XMN
Okay 5.3

The offerings of beverages and the choices were good

Lack of communication by staff. Lack of entertainment on 14 hour flight. Was told not to use device while others were able to use.

JJN
TSN
Mediocre 2.0

Xiamen airlines are horrible I will never fly them again. Phillipines airline was excellent

SHA
XMN
Good 6.3

The flight was delayed due to air traffic control. Subsequently I missed my connecting flight -- Xiamen to Manila that evening and had to spend another night in China. Next flight out of Xiamen was 6pm, Nov 2. Xiamen ground staff was very helpful in booking me the option to fly China Southern to Guangzhou the night of Nov 1, stay for free in a hotel, and then take the 0835 morning China Southern flight from Guangzhou to Manila. It was difficult to identify the right people to speak with and get clear assistance and direction in both Xiamen and Guangzhou.

Sun, May 6
SEA
SIN
21h 00m
Tue, May 22
SIN
SEA
21h 20m
Trip: 17 days
8.6ExcellentShow reviews
Overall 8.6 Excellent
Based on 3347 reviews
Boarding
8.8
Comfort
8.6
Crew
8.9
Entertainment
8.5
Food
8.3
TPE
SEA
Excellent 10.0

As always it's the professional kind efficient staff.

SFO
TPE
Good 6.0

Loved the airline. Flight attendants in economy were the best I've encountered

Some more clarity on carry-on limits would be helpful as would participating in TSA Precheck for US travelers.

BKK
TPE
Excellent 10.0

on time departure and arrival, good food and entertainment, courteous flight staff

TPE
IAH
Excellent 9.0

Crew and service were great.

Food to asian. Entertainment limited and to asian.

BKK
TPE
Okay 4.3

Seat reasonably comfortable in Eco Plus

Flight attendants forgot drink order, boarding didn't happen until 15 minutes after scheduled time with very poor communication from ground staff

Wed, Jan 10
SEA
SIN
35h 00m
Tue, Jan 23
SIN
SEA
34h 15m
Trip: 14 days
6.3GoodShow reviews
Overall 6.3 Good
Based on 3174 reviews
Overall
6.4
Boarding
6.6
Comfort
6.4
Crew
6.8
Entertainment
5.9
Food
5.9
PEK
BKK
Okay 5.6

they should really do something about tight connections. If your first airline is only barely late, it becomes a frantic haste from hell to get thru security again and to your next airline. Security needs to inspect every element of your carryon in spite of the fact you were already screened on your previous flight. They will dump out your entire bag to inspect all contents. Extremely easy to lose important things. They confiscate all spare batteries if they only appear to be high power range regardless of what the actual voltage is.

PEK
MEL
Mediocre 2.0

This was like flying in the 90's. The seats were super small and uncomfortable my TV didn't work and they wouldn't let me use my phone (even on fly mode) and the Beijing international airport didn't have WiFi.

JFK
PEK
Excellent 9.0

Great flight and entertainment throughout.

Everything w this flight was satisfactory. No negatives to mention.

PEK
HKT
Okay 4.3

Crew and flight were professional and courteous.

Passengers from Beijing were rude, and consistently snorting and spitting throughout the entire flight. Not just one person but everyone around us. Very disgusting and nauseating listening to that for 6+hours. I had earbuds in the entire flight and could still hear the spitting...

BKK
PEK
Excellent 9.6

Everything, meals were good.

Mon, Mar 26
SEA
SIN
28h 30m
Tue, Apr 10
SIN
SEA
29h 34m
Trip: 16 days
Overall 0.0 Poor
Based on 0 reviews
Thu, Nov 23
SEA
SIN
42h 01m
Tue, Jan 2
SIN
SEA
33h 10m
$1116
Trip: 41 days
6.3GoodShow reviews
Overall 6.3 Good
Based on 3881 reviews
Overall
6.3
Boarding
6.4
Comfort
6.4
Crew
6.7
Entertainment
6.1
Food
5.8
PVG
KIX
Okay 5.0

I missed my flight to Osaka, cause must claimed baggage, re-checked and immigration & security clearanced in at Pudong.

PVG
SZX
Excellent 9.0

Wondering if I can as a n the right flight out of PVG - luckily yes...

PVG
PEK
Okay 5.0

None

Food, dirty bathroom, smells badly and more

LAX
PVG
Okay 5.3

I liked the seats are roomy

I didn’t like the limited choices for food. In addition I felt those that spoke Chinese were taken care of better. I sat towards the end of the plane and they ran out constantly of food. The food they did serve wasn’t very good.

TAO
ICN
Good 7.3

Crew seemed friendly.

Boarding was delayed 30 min. The attendant who spoke to me, spoke in clear English. The one giving the announcement, her pronunciation was not completely clear. For a routine speech like that, it should be well-rehearsed and clear.

Sat, Jan 20
SEA
SIN
30h 30m
Wed, Jan 31
SIN
SEA
27h 47m
Trip: 12 days
Overall 0.0 Poor
Based on 0 reviews
Sat, Jan 20
SEA
SIN
43h 35m
Sat, Feb 3
SIN
SEA
34h 15m
Trip: 15 days
6.3GoodShow reviews
Overall 6.3 Good
Based on 3174 reviews
Overall
6.4
Boarding
6.6
Comfort
6.4
Crew
6.8
Entertainment
5.9
Food
5.9
JFK
PEK
Good 7.3

Crew efficient

No entertainment, console broken. Ran out of menu item of choice, but alternative was easily digestible.

PEK
BKK
Okay 5.6

they should really do something about tight connections. If your first airline is only barely late, it becomes a frantic haste from hell to get thru security again and to your next airline. Security needs to inspect every element of your carryon in spite of the fact you were already screened on your previous flight. They will dump out your entire bag to inspect all contents. Extremely easy to lose important things. They confiscate all spare batteries if they only appear to be high power range regardless of what the actual voltage is.

PEK
MNL
Mediocre 2.0

Air china needs to improved plane and food

PEK
SYD
Excellent 8.6

Comfort and service on the plane. Lounge in Beijing was wonderful.

What you have to go through in Beijing to transit from one international flight to another. Very disorganized. I will never change planes again in Beijing after this trip. Perhaps it will be better on the way back. Business class travelers should have a special lane.

PEK
YUL
Okay 4.0

Boarding process was really quick. In half an hour they boarded a complete flight.

There was a very rude person sitting behind me. He kept hitting my seat every time I reclined it. I brought up to the flight attendant but she had no intention of getting involved or helping out.

Wed, Apr 4
SEA
SIN
31h 20m
Mon, Apr 16
SIN
SEA
50h 00m
Trip: 13 days
Overall 0.0 Poor
Based on 0 reviews
Mon, Dec 11
SEA
SIN
34h 50m
Mon, Dec 18
SIN
SEA
57h 10m
Trip: 8 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 213 reviews
Overall
7.1
Boarding
7.2
Comfort
7.2
Crew
7.5
Entertainment
6.6
Food
6.8
KHN
XMN
Excellent 10.0

Hostess

SHA
XMN
Good 6.3

The flight was delayed due to air traffic control. Subsequently I missed my connecting flight -- Xiamen to Manila that evening and had to spend another night in China. Next flight out of Xiamen was 6pm, Nov 2. Xiamen ground staff was very helpful in booking me the option to fly China Southern to Guangzhou the night of Nov 1, stay for free in a hotel, and then take the 0835 morning China Southern flight from Guangzhou to Manila. It was difficult to identify the right people to speak with and get clear assistance and direction in both Xiamen and Guangzhou.

CTU
FOC
Excellent 8.6

Gave me a free hotel when I was transferring in Fuzhou. All I had to pay was the taxi fare of 20kuai. The staff are extremely nice and the food from JFK to FOC was excellent. 2 full meals and a sandwich left me pretty full.

It is difficult to get in touch with the English Customer service.

TPE
JJN
Excellent 8.8

Crew and staff are professional and worked well together, fairly efficient

Upon landing, there was a problem with airport customs and immigration which prevented the passengers from leaving the plane. Crew needs to be more proactive with (1) passengers getting up too early and blocking the aisle out of turn. An elder woman was trying to get her bags and exit her row and passengers from behind were not letting her collect and exit. I stopped the rude people from the back who were getting off out of turn. Instructions need to be issued, let people get off the plane in orderly fashion. and (2) crew did not inform passengers what was happening with immigration and customs holdings things up until I hit the service button a few times. Tell the passengers what is going on rather than allow tempers to heat up

NRT
XMN
Okay 5.3

The offerings of beverages and the choices were good

Lack of communication by staff. Lack of entertainment on 14 hour flight. Was told not to use device while others were able to use.

Tue, May 8
SEA
SIN
68h 35m
Sat, May 19
SIN
SEA
67h 09m
Trip: 12 days
Overall 0.0 Poor
Based on 0 reviews
Tue, Feb 13
SEA
SIN
35h 10m
Thu, Mar 1
SIN
SEA
41h 25m
Trip: 17 days
Overall 0.0 Poor
Based on 0 reviews
Mon, Dec 18
SEA
SIN
34h 50m
Sun, Dec 24
SIN
SEA
33h 45m
$1064
Trip: 7 days
7.0GoodShow reviews
Overall 7.0 Good
Based on 213 reviews
Overall
7.1
Boarding
7.2
Comfort
7.2
Crew
7.5
Entertainment
6.6
Food
6.8
JJN
TSN
Mediocre 2.0

Xiamen airlines are horrible I will never fly them again. Phillipines airline was excellent

SHA
XMN
Good 6.3

The flight was delayed due to air traffic control. Subsequently I missed my connecting flight -- Xiamen to Manila that evening and had to spend another night in China. Next flight out of Xiamen was 6pm, Nov 2. Xiamen ground staff was very helpful in booking me the option to fly China Southern to Guangzhou the night of Nov 1, stay for free in a hotel, and then take the 0835 morning China Southern flight from Guangzhou to Manila. It was difficult to identify the right people to speak with and get clear assistance and direction in both Xiamen and Guangzhou.

SZX
FOC
Excellent 8.4

Crew was friendly.

couldn't book through from Shenzhen yp Guilin. Had to check-in again at Fuzhou and go through security again.

CKG
SZX
Excellent 8.8

all of the Xiamen staff were really great.

Nothing that I disliked.

XMN
MNL
Mediocre 2.0

I missed the connecting flight and was rerouted on a Nov 2, 8:35am China Southern flight from Guangzhou to Manila

Sat, Dec 16
SEA
SIN
38h 15m
Sat, Dec 30
SIN
SEA
30h 47m
$1486
Trip: 15 days
Overall 0.0 Poor
Based on 0 reviews
Show more results
*
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:

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

We compile tonnes of data for you
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.

^
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.