Flight Time from Seattle to Singapore

At the moment, you can catch a nonstop flight from Seattle to Singapore with the following airlines, including: Singapore Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

It takes around 17 hours to fly from Seattle (SEA) to Singapore (SIN).

By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Seattle to Singapore is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

Based on Trip.com data in the past 4 weeks, there is 4 flight per week flying from Seattle to Singapore. You can check the weekly schedule for popular airlines on this route below: Singapore Airlines: -/M/-/W/T/F/S -- SQ027 (09:23)

The cheapest months to fly from Seattle to Singapore is September, when demand for travel is lower.

After crunching the numbers on our December flight calendar, it's currently cheapest to fly from Seattle to Singapore on December 8, 2025 with United Airlines, with prices starting at €326.

You can land at any one of the following hubs in Singapore, with Seattle–Tacoma International Airport to Singapore Changi Airport (SEA-SIN) is by far the most common option on this route: Singapore Changi Airport (SIN) Seletar Airport (XSP).

The time difference between Singapore and Seattle is 16h.

Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.