Cheap flights from Seattle to Singapore Changi

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Flight deals from Seattle to Singapore Changi

Looking for a cheap last-minute deal or the best return flight from Seattle to Singapore Changi? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Seattle to Singapore Changi

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Seattle to Singapore Changi flights are currently cheapest in August.

Direct flights from Seattle to Singapore Changi

Seattle to Singapore Changi: Alternative routes

Compare routes from Seattle to Singapore below. You may find an airport to fly into that's cheaper, faster, or easier than Singapore Changi.

Seattle to Singapore: Flight information

The things to know before you go.
Cheapest flight found$470
Cheapest month to flyAugust
Average flight time16 hrs, 48 mins
Most popular airlineSingapore Airlines
Average flights per week12

Finding cheap flights from Seattle to Singapore Changi: Frequently asked questions

The best price we found for a return flight from Seattle to Singapore Changi is $931. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
16 hours and 48 minutes is the average flight time from Seattle to Singapore Changi.
Singapore Airlines flies direct from Seattle to Singapore Changi.
As of April 2025, there are 12 flights per week flying from Seattle to Singapore Changi.
The cheapest month to fly from Seattle to Singapore Changi is usually April 2025.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Seattle to Singapore Changi Airport on Tuesday, 9 September 2025.
Yes – the average flight time is 16 hours and 48 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Singapore Changi but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Singapore is around 40 days in advance, so don’t leave your flight to the last minute.

Travelling from Seattle to Changi International Airport (SIN): what you need to know

  • Seattle has a couple of airports that could be the jumping-off point for your adventure. Explore your options for booking a flight from Seattle to Changi International Airport (SIN) flying out of Seattle-Tacoma International Airport (SEA) or Lake Union Sea Plane Base (LKE).

  • Take a direct flight from Seattle to Changi International Airport and you'll be travelling for around 16 hours 38 minutes.

  • Singapore is 15 hours ahead of Seattle. Changi International Airport is located in Singapore, which operates on the UTC+8 timezone.

  • With 6 direct flights a week between the two airports, Seattle-Tacoma International Airport (SEA) to Changi International Airport (SIN) is the busiest route. Singapore Airlines operates the earliest flight at 08:45. If you prefer to get more out of your day before flying, the last flight from SEA to SIN is with Singapore Airlines at 10:15.

  • To ensure you catch your flight from Seattle to SIN, allow plenty of time for things like baggage drop and finding your gate. Turning up two hours ahead of international departures and an hour before domestic flights is the general travel rule.

  • Going away during a peak month like July? High seasons (like summer, Christmas and New Year) can add another hour at security. Be extra cautious and arrive up to four hours before an international flight and two hours before a domestic departure.

Airports in Seattle

Seattle-Tacoma International Airport (SEA)

  • Seattle-Tacoma International Airport (SEA) makes it easy to travel directly to your destination. Nonstop flights from Seattle to Changi International Airport (SIN) operate out of this terminal.

  • You'll find a direct flight from Seattle to Changi International Airport with Singapore Airlines. This leading airline operates departures from SEA.

  • Think about adding a stopover to potentially find a cheaper flight from Seattle to SIN. Just deselect 'Direct flights only' when searching for departures from Seattle-Tacoma International Airport (SEA). Take a break from travelling at one of these popular airports:

    • Taiwan Taoyuan International Airport (TPE)

    • Ninoy Aquino International Airport (MNL)

    • Narita International Airport (NRT)

  • SEA is around 23 kilometres from the centre of Seattle. To help work out how to get there, use Google Maps. This essential travel app will show you the quickest route and available public transport options.

  • Searching for a handy hotel close to Seattle-Tacoma International Airport? If you're boarding an early flight from Seattle to Changi International Airport, these stays will have you moments from check-in:

Lake Union Sea Plane Base (LKE)

  • Looking to fly out of Lake Union Sea Plane Base (LKE)? You can book a direct flight from Seattle to Changi International Airport (SIN) departing from this hub.

  • From LKE, direct flights from Seattle to SIN are offered by Singapore Airlines.

  • Maximise your holiday with a stopover on your flight from Seattle to Changi International Airport. Visit friends or family or cross another city off your list. Whatever you'd like to do, here's where you can stop between Lake Union Sea Plane Base and SIN:

    • Ninoy Aquino International Airport (MNL)

    • Narita International Airport (NRT)

    • Vancouver International Airport (YVR)

  • On public transport, you can travel from central Seattle to LKE in around 23 minutes. The airport is roughly 3 kilometres away, and making the trip by car will take approximately 11 minutes.

  • Want to spoil yourself with an extra night away before catching your flight from Seattle to SIN? Check in to a hotel near Lake Union Sea Plane Base before your trip officially begins. Here's where you can stay:

About Changi International Airport (SIN)

Getting from Changi International Airport (SIN) to central Singapore

  • Changi International Airport is approximately 21 kilometres from the centre of Singapore. With your own car rental or if you're catching a cab, the drive is about 21 minutes.

  • It typically takes 1 hour when travelling by public transport.

How to find the cheapest flights from Seattle to Changi International Airport (SIN)

  • $470 is the lowest price we've found for a one-way ticket from Seattle to Changi International Airport. Return flights start from $931. Fares are subject to availability and may change at any time.

  • It's best to book 11 months before your departure date. Flight price data suggests you're more likely to find cheap tickets from Seattle to SIN around that time.

  • You'll score the best savings on your tickets from Seattle to Changi International Airport if you travel in August. Go one step further and use the 'Whole month' tool to see the cheapest day to fly out.

  • Log into your online account or use the app to create a Price Alert. We'll notify you straight away if there's a deal you won't want to miss. It doesn't take long, and it'll save you from looking for a cheap ticket from Seattle to SIN every day.

  • Customise your trip using filters. Adjust the total duration, number of stops, and departure and arrival times to find the right flight from Seattle to Changi International Airport. You can also sort the results to see the 'Cheapest,' 'Fastest' or 'Best' options first.

The best time to fly from Seattle to Changi International Airport (SIN)

  • August is the most popular month for flights from Seattle to Changi International Airport. To avoid the crowds, travel to Singapore in February when it's quieter.

  • The warmest month in Singapore is May, with the temperature ranging between 25ºC and 31ºC. Lock in your flights from Seattle to SIN in this month if this is the type of weather you enjoy.

  • Look for cheap flights from Seattle to Changi International Airport in January if you like travelling in cooler conditions. Temperatures are at their lowest then, ranging between 24ºC and 30ºC on average.

More about Singapore

Complete your Singapore trip with a car rental

  • We use the same magic that helped you find your cheap flight from Seattle to Changi International Airport to track down your ideal ride. Check out our car rentals in Singapore and compare offers in one place. Plus you'll find all the info you need to know, from the most popular car type to the best time to book.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.