$346 Cheap Flights from Portland (PDX) to Singapore (SIN)

View $346 flight on Wed, Nov 5, 2025Opens in a new window

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

Cheap Flights from Portland to Singapore (PDX-SIN)

Prices were available within the past 7 days and start at $346 for one-way flights and $745 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Thu, Jan 15 - Tue, Jan 27
PDX
Portland
SIN
Singapore
$745 Roundtrip, found 1 hour ago
$745
Roundtrip
found 1 hour ago
Select Air Canada flight, departing Thu, Jan 15 from Portland to Singapore, returning Tue, Jan 27, priced at $745 found 1 hour ago
Delta
Mon, Feb 2 - Tue, Feb 10
PDX
Portland
SIN
Singapore
$860 Roundtrip, found 1 day ago
$860
Roundtrip
found 1 day ago
Select Delta flight, departing Mon, Feb 2 from Portland to Singapore, returning Tue, Feb 10, priced at $860 found 1 day ago
Korean Air
Thu, Jan 15 - Tue, Jan 27
PDX
Portland
SIN
Singapore
$866 Roundtrip, found 1 hour ago
$866
Roundtrip
found 1 hour ago
Select Korean Air flight, departing Thu, Jan 15 from Portland to Singapore, returning Tue, Jan 27, priced at $866 found 1 hour ago
Japan Airlines
Mon, Feb 2 - Tue, Feb 10
PDX
Portland
SIN
Singapore
$884 Roundtrip, found 1 day ago
$884
Roundtrip
found 1 day ago
Select Japan Airlines flight, departing Mon, Feb 2 from Portland to Singapore, returning Tue, Feb 10, priced at $884 found 1 day ago
United
Tue, Jan 6 - Mon, Jan 19
PDX
Portland
SIN
Singapore
$1,025 Roundtrip, found 1 hour ago
$1,025
Roundtrip
found 1 hour ago
Select United flight, departing Tue, Jan 6 from Portland to Singapore, returning Mon, Jan 19, priced at $1,025 found 1 hour ago
American Airlines
Mon, Feb 2 - Tue, Feb 10
PDX
Portland
SIN
Singapore
$1,026 Roundtrip, found 1 day ago
$1,026
Roundtrip
found 1 day ago
Select American Airlines flight, departing Mon, Feb 2 from Portland to Singapore, returning Tue, Feb 10, priced at $1,026 found 1 day ago
Cathay Pacific
Thu, Jan 15 - Tue, Jan 27
PDX
Portland
SIN
Singapore
$1,039 Roundtrip, found 1 hour ago
$1,039
Roundtrip
found 1 hour ago
Select Cathay Pacific flight, departing Thu, Jan 15 from Portland to Singapore, returning Tue, Jan 27, priced at $1,039 found 1 hour ago
All Nippon Airways
Tue, Dec 9 - Tue, Dec 16
PDX
Portland
SIN
Singapore
$1,079 Roundtrip, found 4 days ago
$1,079
Roundtrip
found 4 days ago
Select All Nippon Airways flight, departing Tue, Dec 9 from Portland to Singapore, returning Tue, Dec 16, priced at $1,079 found 4 days ago
STARLUX Airlines
Sat, Jan 17 - Sat, Jan 24
PDX
Portland
SIN
Singapore
$1,117 Roundtrip, found 1 day ago
$1,117
Roundtrip
found 1 day ago
Select STARLUX Airlines flight, departing Sat, Jan 17 from Portland to Singapore, returning Sat, Jan 24, priced at $1,117 found 1 day ago
China Eastern Airlines
Sun, Nov 2 - Tue, Nov 4
PDX
Portland
SIN
Singapore
$1,155 Roundtrip, found 3 days ago
$1,155
Roundtrip
found 3 days ago
Select China Eastern Airlines flight, departing Sun, Nov 2 from Portland to Singapore, returning Tue, Nov 4, priced at $1,155 found 3 days ago

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

October is typically the cheapest month to fly

From $719 - $1,231 per traveler.

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 $745
SIN
Changi
Cheapest
Average driving time to city center18 min
Flights from $745

Frequently asked questions

How much does a flight from Portland Intl. Airport (PDX) to Changi Airport (SIN) cost?
Secure a cheap one-way flight from $346 or cheap return flight from $745 from Portland Intl. Airport (PDX) to Changi Airport (SIN) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Portland Intl. Airport (PDX) to Changi Airport (SIN)?
The cheapest month to fly from PDX to SIN is January, when demand is low. Off-peak months are generally when airlines offer better prices between these airports.
What is the cheapest airline that flies from Portland Intl. Airport (PDX) to Changi Airport (SIN)?
Expedia's filter tool lets you easily compare travel time, airlines and fares all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to find the carrier with the cheapest PDX to SIN flight.
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.

Travel information

Origin airport
Portland Intl.
Destination airport
Changi
Airlines serving
Air Canada, Air France, Alaska Airlines, All Nippon Airways, American Airlines, Asiana Airlines, British Airways, Cathay Pacific, Delta, Finnair, Japan Airlines, KLM, Korean Air, Lufthansa, Malaysia Airlines, Qantas Airways, Qatar Airways, STARLUX Airlines, Swiss International Air Lines, United
Roundtrip price
$744
Distance
8128 mi

Book with confidence

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 January. 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 $346 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.

 

Portland to Singapore Flights

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*Available to One Key members.