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Cheap flights from Seattle to Singapore from $258

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Singapore departing on 1/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

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Asiana Airlines Logo
12:10 am - 9:55 pmSEA-SIN
29h 45m1 stop
Asiana Airlines Logo
10:50 pm - 2:55 pmSIN-SEA
31h 05m1 stop
$706Asiana Airlines
Find Deal
Sat, Feb 28 - Wed, May 13
Asiana Airlines Logo
12:10 am - 9:55 pmSEA-SIN
29h 45m1 stop
Asiana Airlines Logo
11:10 pm - 1:55 pmSIN-SEA
30h 45m1 stop
$707Asiana Airlines
Find Deal
Sat, Jan 31 - Sat, Feb 7
Asiana Airlines Logo
12:10 am - 9:30 pmSEA-SIN
30h 20m1 stop
Asiana Airlines Logo
10:50 pm - 2:55 pmSIN-SEA
31h 05m1 stop
$708Asiana Airlines
Find Deal
Tue, Mar 31 - Wed, Jun 17
Singapore Airlines Logo
9:45 am - 5:45 pmSEA-SIN
17h 00mnonstop
Singapore Airlines Logo
9:00 am - 8:45 amSIN-SEA
14h 45mnonstop
$725Singapore Airlines
Find Deal
Fri, Mar 13 - Sun, Mar 29
Singapore Airlines Logo
10:15 am - 5:35 pmSEA-SIN
16h 20mnonstop
Singapore Airlines Logo
9:00 am - 8:45 amSIN-SEA
14h 45mnonstop
$727Singapore Airlines
Find Deal
Thu, Apr 2 - Sun, Apr 12
Air Canada Logo
3:40 pm - 11:15 amSEA-SIN
27h 35m2 stops
Air Canada Logo
8:50 am - 2:31 pmSIN-SEA
21h 41m1 stop
$737Air Canada
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Wed, Nov 19 - Thu, Nov 27
Air Canada Logo
3:40 pm - 11:15 amSEA-SIN
27h 35m2 stops
Air Canada Logo
9:00 pm - 9:31 amSIN-SEA
28h 31m2 stops
$738Air Canada
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Tue, Dec 2 - Tue, Dec 9
Korean Air Logo
11:00 am - 12:10 amSEA-SIN
21h 10m1 stop
Korean Air Logo
10:30 pm - 9:00 amSIN-SEA
26h 30m1 stop
$756Korean Air
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Mon, Dec 1 - Wed, Dec 10
United Airlines Logo
3:30 pm - 8:15 pmSEA-SIN
36h 45m2 stops
United Airlines Logo
10:20 pm - 11:30 amSIN-SEA
29h 10m1 stop
$760United Airlines
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Sun, Jan 11 - Mon, Jan 26
United Airlines Logo
9:25 am - 8:15 pmSEA-SIN
42h 50m1 stop
United Airlines Logo
10:20 pm - 12:59 amSIN-SEA
18h 39m1 stop
$762United Airlines
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Sun, Jan 11 - Wed, Jan 21

Asiana Airlines flights from Seattle to Singapore

Our best Asiana Airlines deals on Seattle to Singapore flight tickets
Asiana Airlines
Feb 28
SEA12:10 amSeattle/Tacoma Intl
29h 45m
1 stop
SIN9:55 pmSingapore Changi
May 13
SIN10:50 pmSingapore Changi
31h 05m
1 stop
SEA2:55 pmSeattle/Tacoma Intl
$706
Find similar
Asiana Airlines
Jan 31
SEA12:10 amSeattle/Tacoma Intl
29h 45m
1 stop
SIN9:55 pmSingapore Changi
Feb 7
SIN11:10 pmSingapore Changi
30h 45m
1 stop
SEA1:55 pmSeattle/Tacoma Intl
$707
Find similar
Asiana Airlines
Mar 31
SEA12:10 amSeattle/Tacoma Intl
30h 20m
1 stop
SIN9:30 pmSingapore Changi
Jun 17
SIN10:50 pmSingapore Changi
31h 05m
1 stop
SEA2:55 pmSeattle/Tacoma Intl
$708
Find similar

Singapore Airlines flights from Seattle to Singapore

Our best Singapore Airlines deals on Seattle to Singapore flight tickets
Singapore Airlines
Mar 13
SEA9:45 amSeattle/Tacoma Intl
17h 00m
SIN5:45 pmSingapore Changi
Mar 29
SIN9:00 amSingapore Changi
14h 45m
SEA8:45 amSeattle/Tacoma Intl
$725
Find similar
Singapore Airlines
Apr 2
SEA10:15 amSeattle/Tacoma Intl
16h 20m
SIN5:35 pmSingapore Changi
Apr 12
SIN9:00 amSingapore Changi
14h 45m
SEA8:45 amSeattle/Tacoma Intl
$727
Find similar
Singapore Airlines
Mar 17
SEA9:45 amSeattle/Tacoma Intl
17h 00m
SIN5:45 pmSingapore Changi
Apr 26
SIN9:00 amSingapore Changi
14h 45m
SEA8:45 amSeattle/Tacoma Intl
$730
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momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Singapore that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated November 2, 2025.
Use the filters below to find and compare flights from Seattle to Singapore that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Sat 2/28

12:10 am-9:55 pm

1 stop29h 45m

Singapore Changi

Wed 5/13

10:50 pm-2:55 pm

1 stop31h 05m

$706

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Sat 1/31

12:10 am-9:55 pm

1 stop29h 45m

Singapore Changi

Sat 2/7

11:10 pm-1:55 pm

1 stop30h 45m

$707

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Tue 3/31

12:10 am-9:30 pm

1 stop30h 20m

Singapore Changi

Wed 6/17

10:50 pm-2:55 pm

1 stop31h 05m

$708

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Fri 3/13

9:45 am-5:45 pm

Nonstop17h 00m

Singapore Changi

Sun 3/29

9:00 am-8:45 am

Nonstop14h 45m

$725

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Thu 4/2

10:15 am-5:35 pm

Nonstop16h 20m

Singapore Changi

Sun 4/12

9:00 am-8:45 am

Nonstop14h 45m

$727

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Wed 11/19

3:40 pm-11:15 am

2 stops27h 35m

Singapore Changi

Thu 11/27

8:50 am-2:31 pm

1 stop21h 41m

$737

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Tue 12/2

3:40 pm-11:15 am

2 stops27h 35m

Singapore Changi

Tue 12/9

9:00 pm-9:31 am

2 stops28h 31m

$738

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Mon 12/1

11:00 am-12:10 am

1 stop21h 10m

Singapore Changi

Wed 12/10

10:30 pm-9:00 am

1 stop26h 30m

$756

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Sun 1/11

3:30 pm-8:15 pm

2 stops36h 45m

Singapore Changi

Mon 1/26

10:20 pm-11:30 am

1 stop29h 10m

$760

SeattleSingapore

SEA - SIN

SEASIN

Seattle/Tacoma Intl

Sun 1/11

9:25 am-8:15 pm

1 stop42h 50m

Singapore Changi

Wed 1/21

10:20 pm-12:59 am

1 stop18h 39m

$762

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Singapore from

How to get the cheapest flight ticket from Seattle to Singapore

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Singapore?

The month of September is, on average, the cheapest month to fly to Singapore from Seattle, with most prices found around $725. If you aren’t able to travel to Singapore during the month of September, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $741.

What is the cheapest day to depart on your flight to Singapore?

The cheapest day to depart from Seattle to Singapore is on a Tuesday when prices can be found for as low as $1,022. The most expensive day to fly to Singapore is Monday, with ticket prices averaging around $1,186.

What is the cheapest time of day to depart on your flight to Singapore?

In the morning is the cheapest time of day to fly from Seattle to Singapore when you can find flight prices for as low as $1,086. Flying to Singapore in the morning is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $1,226 on average. Flights to Singapore from Seattle in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Seattle/Tacoma Intl to Singapore flight route?

Fly from Seattle/Tacoma Intl to Singapore Changi for the best Seattle/Tacoma Intl - Singapore flight prices

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

You are more likely to see cheaper flights to Singapore from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Singapore for around $919 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Singapore from Seattle for as low as $804 on momondo.

What cabin class options are available on Seattle/Tacoma Intl to Singapore flights?

There are 3 cabin classes available to choose from on Seattle/Tacoma Intl to Singapore flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Cheap Seattle to Singapore flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Singapore

Best Price Found

$306

Fastest flight time

16h 20m

Direct flights

Mon, Wed, Fri, Sat and Sun

Airports in Singapore

1 airport
The best one-way flight to Singapore from Seattle in the past 72 hours is $306. The best round-trip flight deal from Seattle to Singapore found on momondo in the last 72 hours is $708.
The fastest flight from Seattle to Singapore takes 16h 20m
Direct flights go from Seattle to Singapore on Monday, Wednesday, Friday, Saturday and Sunday. The only airline offering direct flights is Singapore Airlines.
There is 1 airport near Singapore: Singapore Changi (SIN)
Search flight deals

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Singapore?

    Prices for flights from Seattle/Tacoma Intl Airport to Singapore are updated daily.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Singapore?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Singapore?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Singapore.

  • What documentation or ID do you need to fly to Singapore?

    The travel and health documents you'll need for your trip to Singapore may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Singapore. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Seattle to Singapore?

Best airlines flying from Seattle to Singapore

Compare and see reviews for airlines that fly from Seattle to Singapore with momondo
Airline
Rating
Free Cancellation
Price
Singapore AirlinesPriceFrom $596Free CancellationRating
8.1
1,391 reviews
Search Singapore Airlines flights
Philippine AirlinesPriceFrom $650Free CancellationRating
7.3
932 reviews
Search Philippine Airlines flights
Asiana AirlinesPriceFrom $662Free CancellationRating
8.2
484 reviews
Search Asiana Airlines flights
Japan AirlinesPriceFrom $687Free CancellationRating
8.3
1,599 reviews
Search Japan Airlines flights
Air CanadaPriceFrom $712Free CancellationRating
7.1
10,394 reviews
Search Air Canada flights
ANAPriceFrom $718Free CancellationRating
8.4
1,000 reviews
Search ANA flights
United AirlinesPriceFrom $724Free CancellationRating
7.4
8,997 reviews
Search United Airlines flights
Korean AirPriceFrom $744Free CancellationRating
8.4
1,158 reviews
Search Korean Air flights
DeltaPriceFrom $750Free CancellationRating
7.9
8,001 reviews
Search Delta flights
China AirlinesPriceFrom $933Free CancellationRating
8.3
776 reviews
Search China Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Singapore?

It is quick and easy to find Seattle to Singapore flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Singapore that suits you.

Can I find flights from Seattle to Singapore with flexible booking policies on momondo?

momondo does allow users to show only those flights to Singapore from Seattle which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Seattle to Singapore?

momondo provides multiple filters to help you find the best flight to Singapore from Seattle. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Seattle to Singapore right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Singapore, momondo offers a useful price alert feature which will track prices for flights to Singapore from Seattle and alert you when they change.

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