$412 Cheap Flights from Singapore (SIN) to Seattle (SEA)

View $412 flight on Tue, Nov 11, 2025Opens in a new window

Popular airlines from Singapore Changi Airport (SIN) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Singapore to Seattle (SIN-SEA)

Prices were available within the past 7 days and start at $412 for one-way flights and $602 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Tue, Oct 21 - Thu, Nov 6
SIN
Singapore
SEA
Seattle
$602 Roundtrip, found 3 days ago
$602
Roundtrip
found 3 days ago
Select Air Canada flight, departing Tue, Oct 21 from Singapore to Seattle, returning Thu, Nov 6, priced at $602 found 3 days ago
Asiana Airlines
Wed, Nov 5 - Wed, Nov 26
SIN
Singapore
SEA
Seattle
$669 Roundtrip, found 3 days ago
$669
Roundtrip
found 3 days ago
Select Asiana Airlines flight, departing Wed, Nov 5 from Singapore to Seattle, returning Wed, Nov 26, priced at $669 found 3 days ago
United
Sun, Jan 18 - Sun, Jan 18
SIN
Singapore
SEA
Seattle
$820 Roundtrip, found 4 days ago
$820
Roundtrip
found 4 days ago
Select United flight, departing Sun, Jan 18 from Singapore to Seattle, returning Sun, Jan 18, priced at $820 found 4 days ago
STARLUX Airlines
Sun, Nov 2 - Sun, Nov 30
SIN
Singapore
SEA
Seattle
$829 Roundtrip, found 8 hours ago
$829
Roundtrip
found 8 hours ago
Select STARLUX Airlines flight, departing Sun, Nov 2 from Singapore to Seattle, returning Sun, Nov 30, priced at $829 found 8 hours ago
Korean Air
Tue, Sep 9 - Thu, Oct 16
SIN
Singapore
SEA
Seattle
$847 Roundtrip, just found
$847
Roundtrip
just found
Select Korean Air flight, departing Tue, Sep 9 from Singapore to Seattle, returning Thu, Oct 16, priced at $847 just found
Delta
Sun, Nov 2 - Sun, Nov 9
SIN
Singapore
SEA
Seattle
$848 Roundtrip, found 1 day ago
$848
Roundtrip
found 1 day ago
Select Delta flight, departing Sun, Nov 2 from Singapore to Seattle, returning Sun, Nov 9, priced at $848 found 1 day ago
EVA Airways
Fri, Aug 29 - Tue, Sep 2
SIN
Singapore
SEA
Seattle
$868 Roundtrip, found 5 hours ago
$868
Roundtrip
found 5 hours ago
Select EVA Airways flight, departing Fri, Aug 29 from Singapore to Seattle, returning Tue, Sep 2, priced at $868 found 5 hours ago
China Airlines
Thu, Nov 13 - Wed, Nov 19
SIN
Singapore
SEA
Seattle
$869 Roundtrip, found 7 hours ago
$869
Roundtrip
found 7 hours ago
Select China Airlines flight, departing Thu, Nov 13 from Singapore to Seattle, returning Wed, Nov 19, priced at $869 found 7 hours ago
All Nippon Airways
Thu, Sep 18 - Sun, Sep 28
SIN
Singapore
SEA
Seattle
$942 Roundtrip, found 1 hour ago
$942
Roundtrip
found 1 hour ago
Select All Nippon Airways flight, departing Thu, Sep 18 from Singapore to Seattle, returning Sun, Sep 28, priced at $942 found 1 hour ago
Philippine Airlines
Thu, Sep 18 - Sun, Sep 28
SIN
Singapore
SEA
Seattle
$959 Roundtrip, found 1 hour ago
$959
Roundtrip
found 1 hour ago
Select Philippine Airlines flight, departing Thu, Sep 18 from Singapore to Seattle, returning Sun, Sep 28, priced at $959 found 1 hour ago

Find the cheapest month to fly from Singapore (SIN) to Seattle (SEA)

May is typically the cheapest month to fly

From $598 - $878 per traveler.

Graph displaying average flight prices per month

Flights from Singapore (SIN) to Seattle (SEA)
Origin airport
Changi
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Air Canada, All Nippon Airways, American Airlines, Asiana Airlines, British Airways, Cathay Pacific, China Airlines, Delta, EVA Airways, Emirates, Japan Airlines, KLM, Korean Air, Lufthansa, Philippine Airlines, Qatar Airways, STARLUX Airlines, Singapore Airlines, Turkish Airlines, United
Roundtrip price
$602
Distance
8064 mi

Singapore to Seattle Flights

The cheapest times to fly from Singapore to Seattle

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Singapore to Seattle are during the month of October. You can find some of the cheapest flights from Singapore to Seattle with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Singapore to Seattle

Sunday is one of the best days to book for cheap flights from Singapore to Seattle: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Singapore to Seattle

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Singapore to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $412 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Singapore to Seattle flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Singapore to Seattle airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Changi Airport (SIN) to Seattle - Tacoma Intl. Airport (SEA) cost?
Discover the latest flight deals from SIN to SEA by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from SIN to SEA?
The cheapest flights from SIN to SEA are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Changi Airport (SIN) to Seattle - Tacoma Intl. Airport (SEA)?
When departing from Changi Airport (SIN), you can board a direct flight to Seattle - Tacoma Intl. Airport (SEA) with Singapore Airlines.
What is the cheapest airline that flies from SIN to SEA?
At the moment, the cheapest carrier operating one-way flights from SIN to SEA is Singapore Airlines. You can jet off on this route from $414. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from SIN on October 9 2025. Prices were last updated on July 23 2025 and have not changed since.
How many flights per day from Changi Airport (SIN) to Seattle - Tacoma Intl. Airport (SEA)?
On average, there are 4 direct flights flying from Changi Airport (SIN) to Seattle - Tacoma Intl. Airport (SEA) weekly. If you don't find one that fits your travel plans, think about a flight that includes a layover. Customize your search results on Expedia to include one stop or more and opt for the next best option.
What are the most popular departure times for flights from Changi Airport (SIN) to Seattle - Tacoma Intl. Airport (SEA)?
More passengers fly between SIN and SEA at 9 AM than at any other time. Looking to skip the crowds? Travel outside of rush hours and you're likely to save on your fare as well.
What day of the week has the most flights from SIN to SEA?
If you jet off on a Thursday, you'll get the greatest range of choices for flights from Changi Airport (SIN) to Seattle - Tacoma Intl. Airport (SEA).
What is the earliest flight from Changi Airport (SIN) to Seattle - Tacoma Intl. Airport (SEA)?
Take the earliest flight at around 9:00AM UTC+8, heading out of Changi Airport (SIN). You'll be traveling for roughly 14h 10m, reaching Seattle - Tacoma Intl. Airport (SEA) at approximately 7:10AM UTC-8.
How long does it take to fly from Changi Airport (SIN) to Seattle - Tacoma Intl. Airport (SEA)?
The average flight duration from SIN to SEA is 14 hours and 10 minutes, covering a total distance of 8,100 mi.
What is the best time to fly from Changi Airport (SIN) to Seattle - Tacoma Intl. Airport (SEA)?
Select a flight from Changi Airport (SIN) to Seattle - Tacoma Intl. Airport (SEA) that takes off before 3 PM to reduce the risk of cancellations. Later departures are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Seattle from Changi Airport (SIN)?
Seattle - Tacoma Intl. Airport (SEA) is the only airport in Seattle with direct flights from Changi Airport (SIN). Explore the options and find affordable fares on Expedia.
Is it cheaper to buy a plane ticket from Changi Airport (SIN) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Last-minute bookings from SIN to SEA are typically more expensive. To lock in the lowest prices, start searching for flights as soon as possible. That being said, if you can play around with your travel dates, you may score a cheap fare right before your journey.
Is it cheaper to book a SIN to SEA flight and hotel package?
Securing a SIN to SEA flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip in one place. Choose from our extensive range of stays and then add activities, flights and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Changi Airport (SIN) to Seattle - Tacoma Intl. Airport (SEA)?
You can usually reschedule or cancel your SIN to SEA flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find more information on our Customer Service portal.

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*Available to One Key members.