$399 Cheap Flights from Portland (PDX) to Singapore (SIN)

View $399 flight on Wed, Apr 29, 2026Opens in a new window

Popular airlines from Portland International Airport (PDX) to Singapore Changi Airport (SIN)

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Cheap Flights from Portland to Singapore (PDX-SIN)

Prices were available within the past 7 days and start at $399 for one-way flights and $718 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Tue, Sep 9 - Thu, Oct 9
PDX
Portland
SIN
Singapore
$718 Roundtrip, found 9 hours ago
$718
Roundtrip
found 9 hours ago
Select Air Canada flight, departing Tue, Sep 9 from Portland to Singapore, returning Thu, Oct 9, priced at $718 found 9 hours ago
Delta
Tue, Nov 18 - Wed, Nov 26
PDX
Portland
SIN
Singapore
$841 Roundtrip, found 5 hours ago
$841
Roundtrip
found 5 hours ago
Select Delta flight, departing Tue, Nov 18 from Portland to Singapore, returning Wed, Nov 26, priced at $841 found 5 hours ago
Korean Air
Mon, Jan 5 - Thu, Jan 15
PDX
Portland
SIN
Singapore
$846 Roundtrip, found 1 hour ago
$846
Roundtrip
found 1 hour ago
Select Korean Air flight, departing Mon, Jan 5 from Portland to Singapore, returning Thu, Jan 15, priced at $846 found 1 hour ago
Japan Airlines
Thu, Sep 4 - Thu, Sep 11
PDX
Portland
SIN
Singapore
$852 Roundtrip, found 3 days ago
$852
Roundtrip
found 3 days ago
Select Japan Airlines flight, departing Thu, Sep 4 from Portland to Singapore, returning Thu, Sep 11, priced at $852 found 3 days ago
Singapore Airlines
Mon, Feb 2 - Tue, Feb 17
PDX
Portland
SIN
Singapore
$859 Roundtrip, found 10 hours ago
$859
Roundtrip
found 10 hours ago
Select Singapore Airlines flight, departing Mon, Feb 2 from Portland to Singapore, returning Tue, Feb 17, priced at $859 found 10 hours ago
American Airlines
Wed, Feb 11 - Thu, Feb 26
PDX
Portland
SIN
Singapore
$1,006 Roundtrip, found 10 hours ago
$1,006
Roundtrip
found 10 hours ago
Select American Airlines flight, departing Wed, Feb 11 from Portland to Singapore, returning Thu, Feb 26, priced at $1,006 found 10 hours ago
United
Mon, Aug 18 - Mon, Aug 25
PDX
Portland
SIN
Singapore
$1,024 Roundtrip, just found
$1,024
Roundtrip
just found
Select United flight, departing Mon, Aug 18 from Portland to Singapore, returning Mon, Aug 25, priced at $1,024 just found
STARLUX Airlines
Wed, Feb 4 - Wed, Feb 11
PDX
Portland
SIN
Singapore
$1,048 Roundtrip, found 20 hours ago
$1,048
Roundtrip
found 20 hours ago
Select STARLUX Airlines flight, departing Wed, Feb 4 from Portland to Singapore, returning Wed, Feb 11, priced at $1,048 found 20 hours ago
All Nippon Airways
Tue, Aug 12 - Wed, Aug 27
PDX
Portland
SIN
Singapore
$1,079 Roundtrip, found 14 hours ago
$1,079
Roundtrip
found 14 hours ago
Select All Nippon Airways flight, departing Tue, Aug 12 from Portland to Singapore, returning Wed, Aug 27, priced at $1,079 found 14 hours ago
Cathay Pacific
Wed, Apr 29 - Thu, May 14
PDX
Portland
SIN
Singapore
$1,117 Roundtrip, found 9 hours ago
$1,117
Roundtrip
found 9 hours ago
Select Cathay Pacific flight, departing Wed, Apr 29 from Portland to Singapore, returning Thu, May 14, priced at $1,117 found 9 hours ago

Find the cheapest month to fly from Portland (PDX) to Singapore (SIN)

September is typically the cheapest month to fly

From $737 - $1,198 per traveler.

Graph displaying average flight prices per month

Alternative airports near Singapore

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Changi SIN. Cheapest option available. Average driving time to city center is 18 minutes. Flights from $1,433
SIN
Changi
Cheapest
Average driving time to city center18 min
Flights from $1,433
Flights from Portland (PDX) to Singapore (SIN)
Origin airport
Portland Intl.
Destination airport
Changi
Airlines serving
Air Canada, Air France, Alaska Airlines, All Nippon Airways, American Airlines, Asiana Airlines, Cathay Pacific, Delta, Finnair, Japan Airlines, KLM, Korean Air, Lufthansa, Malaysia Airlines, Qantas Airways, Qatar Airways, STARLUX Airlines, Singapore Airlines, Swiss International Air Lines, United
Roundtrip price
$717
Distance
8128 mi

Portland to Singapore Flights

The cheapest times to fly from Portland to Singapore

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 Portland to Singapore are during the month of September. You can find some of the cheapest flights from Portland to Singapore with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Portland to Singapore

Sunday is one of the best days to book for cheap flights from Portland to Singapore: 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 Portland to Singapore

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 Portland to Singapore in 2025. You can also book with separate airlines for your outbound and return journeys, from $399 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 Portland to Singapore 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 Portland to Singapore 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 Portland Intl. Airport (PDX) to Changi Airport (SIN) cost?
Discover the latest flight deals from PDX to SIN 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 PDX to SIN?
The cheapest flights from PDX to SIN are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from PDX to SIN?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from PDX to SIN. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Portland Intl. Airport (PDX) to Changi Airport (SIN)?
Direct flights from Portland Intl. Airport (PDX) to Changi Airport (SIN) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel dates and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from PDX to SIN?
Generally you'll find the largest variety of flight choices on a Friday. Tuesdays are often the quietest.* But this can change depending on the airline, season and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Portland Intl. Airport (PDX) to Changi Airport (SIN)?
To avoid possible delays on the Portland Intl. Airport (PDX) to Changi Airport (SIN) route, aim to fly before 3 PM. Flights after this time have a 22% higher chance of cancellation.**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.
Is it cheaper to buy a plane ticket from Portland Intl. Airport (PDX) to Changi Airport (SIN) last-minute?
Booking your ticket from PDX to SIN just before your journey is generally more expensive. However, if there's some wiggle room with your schedule, you could land a cheap last-minute fare.
Is it cheaper to book a PDX to SIN flight and hotel package?
Booking a PDX to SIN flight and hotel package tends to be cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Choose from our wide range of hotels and then add flights, car rentals and activities to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Portland Intl. Airport (PDX) to Changi Airport (SIN)?
If you booked your PDX to SIN flight in the last 24 hours, you may be able to modify or cancel it at no cost. Depending on the airline and the type of fare you have, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you want more information.

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*Available to One Key members.