Find flights
When to book
FAQs

Cheap flights from Portland to Singapore from S$ 561

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11-5. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SIN
7 Mar — 14 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Portland to Singapore

Enter your travel dates to find the best prices.

Cheapest flights from Portland to Singapore
Explore the most affordable flight options available from Portland to Singapore. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 February 2026.

Tue 14-407:14
PDX
-
SIN
2 stops26h 31m
Cathay Pacific
Tue 21-407:20
SIN
-
PDX
2 stops24h 10m
Cathay Pacific
Deal found 5-2S$ 1,064
Tue 14-414:37
PDX
-
SIN
1 stop26h 13m
Singapore Airlines
Tue 21-409:15
SIN
-
PDX
1 stop22h 15m
Singapore Airlines
Deal found 5-2S$ 1,072
Wed 28-1007:00
PDX
-
SIN
2 stops26h 25m
Cathay Pacific
Tue 17-1114:05
SIN
-
PDX
2 stops22h 26m
Cathay Pacific
Deal found 3-2S$ 1,114
Tue 14-417:49
PDX
-
SIN
1 stop23h 01m
Singapore Airlines
Wed 6-509:15
SIN
-
PDX
1 stop19h 32m
Singapore Airlines
Deal found 4-2S$ 1,126
Mon 2-321:30
PDX
-
SIN
2 stops40h 10m
Cathay Pacific
Tue 17-318:00
SIN
-
PDX
2 stops30h 50m
Cathay Pacific
Deal found 5-2S$ 1,137
Fri 18-906:07
PDX
-
SIN
1 stop20h 28m
Singapore Airlines
Sun 20-909:00
SIN
-
PDX
1 stop18h 22m
Singapore Airlines
Deal found 3-2S$ 1,138
Wed 1-407:05
PDX
-
SIN
1 stop21h 05m
Singapore Airlines
Mon 22-609:15
SIN
-
PDX
1 stop22h 35m
Singapore Airlines
Deal found 4-2S$ 1,140
Fri 1-517:49
PDX
-
SIN
1 stop23h 01m
Singapore Airlines
Sat 9-509:00
SIN
-
PDX
1 stop18h 52m
Singapore Airlines
Deal found 3-2S$ 1,161
Sat 15-819:05
PDX
-
SIN
2 stops26h 35m
STARLUX Airlines
Mon 31-814:00
SIN
-
PDX
2 stops25h 10m
STARLUX Airlines
Deal found 3-2S$ 1,174
Wed 28-1007:00
PDX
-
SIN
2 stops27h 00m
Singapore Airlines
Tue 17-1109:00
SIN
-
PDX
1 stop20h 50m
Singapore Airlines
Deal found 3-2S$ 1,179
Mon 16-207:05
PDX
-
SIN
2 stops25h 20m
Cathay Pacific
Sun 1-320:15
SIN
-
PDX
2 stops36h 58m
Cathay Pacific
Deal found 3-2S$ 1,182
Sat 15-814:55
PDX
-
SIN
1 stop25h 55m
Singapore Airlines
Mon 31-820:45
SIN
-
PDX
1 stop27h 40m
Singapore Airlines
Deal found 3-2S$ 1,184

Find flight deals from Portland to Singapore

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to Singapore (SIN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 5 February 2026.

Round-trip from

S$ 1,093

One-way from

S$ 441

Popular in

December

Cheapest in

September

Average price

S$ 1,172
Cathay Pacific
  • Cathay Pacific
  • 14-4-21-4
  • 4 total stops
  • 50h 41m total
  • Portland to Singapore
Search Deals
1-3
  • 1-3
  • 2 total stops
  • 25h 43m total
  • Portland to Singapore
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (S$ 267 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (S$ 100 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Portland to Singapore that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 200,618 searches. Data last updated 5 February 2026.
Use the filters below to find and compare flights from Portland to Singapore that are best for you.

Fly from

Portland

Fly to

Singapore

Route

Depart

Return

Price

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 14-4

14:37-07:50

1 stop26h 13m

Singapore Changi

Tue 21-4

09:15-16:30

1 stop22h 15m

S$ 1,072

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 14-4

19:27-09:05

2 stops22h 38m

Singapore Changi

Wed 6-5

23:25-19:05

2 stops34h 40m

S$ 1,137

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 16-2

07:05-00:25

2 stops25h 20m

Singapore Changi

Sun 1-3

20:15-17:13

2 stops36h 58m

S$ 1,182

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Fri 1-5

09:53-21:30

2 stops44h 37m

Singapore Changi

Sat 9-5

09:15-16:22

1 stop22h 07m

S$ 1,216

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 15-2

21:30-00:25

2 stops34h 55m

Singapore Changi

Thu 26-2

18:00-09:42

2 stops31h 42m

S$ 1,227

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 20-5

12:33-05:15

1 stop25h 42m

Singapore Changi

Fri 29-5

09:00-23:03

1 stop29h 03m

S$ 1,255

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 16-2

07:05-11:55

2 stops36h 50m

Singapore Changi

Wed 25-2

20:15-16:50

2 stops36h 35m

S$ 1,257

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 14-4

19:05-00:45

2 stops38h 40m

Singapore Changi

Tue 21-4

07:00-14:40

1 stop22h 40m

S$ 1,283

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 13-4

19:27-12:40

2 stops26h 13m

Singapore Changi

Thu 16-4

14:00-21:38

2 stops22h 38m

S$ 1,332

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 16-2

06:25-00:10

2 stops25h 45m

Singapore Changi

Thu 26-2

01:35-12:42

2 stops27h 07m

S$ 1,348

Flights are sorted by cheapest return flights first.

Deals found on 3-2

Showing 1-10 of 19 results
1
2

Best time to book a flight from Portland to Singapore

Have a flexible travel schedule? Discover the best time to fly to Singapore from Portland with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Portland to Singapore

How far ahead should I book a flight from Portland to Singapore?

Use this chart to determine the optimal time to book a return flight from Portland to Singapore. Price data was last updated on 30 January 2026.

To ensure you get the cheapest price possible for a flight from Portland to Singapore, you should look to book at least 5 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Portland to Singapore?

Currently, September is the cheapest month in which you can book a flight from Portland to Singapore (average of S$ 881). Flying from Portland to Singapore in December is currently the most expensive (average of S$ 1,051). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Portland to Singapore. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Portland to Singapore?

    There are many flights that can get you from Portland to Singapore in 25h 20m. Fly via Singapore Airlines or Cathay Pacific to get the fastest option. The distance between Portland and Singapore is about 13073 km. Both multi-stop and direct flights can be found to your destination and back.

  • Can I find deals for flights from Portland to Singapore that include hotel bookings?

    Yes. In addition to deals on Portland to Singapore flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Portland to Singapore?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Singapore.

  • Can I find deals for business class flights from Portland to Singapore?

    Yes. Cheapflights offers flight deals from Portland to Singapore by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Portland to Singapore?

    Currently, September is the cheapest month in which you can book a flight from Portland to Singapore (average of S$ 881). Flying from Portland to Singapore in December is currently the most expensive (average of S$ 1,051). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Portland to Singapore

See prices for flight routes from nearby airports that may be better suited for you.
Eugene to Singapore flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Portland to Singapore?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Singapore from Portland today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Portland to Singapore?

Cheapflights helps you find that perfect flight to Singapore from Portland by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Portland to Singapore with no change fees?

Yes, we can. To see specific flights from Portland to Singapore with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Portland to Singapore become cheaper?

Not ready to book yet? You can track prices for flights from Portland to Singapore on Cheapflights with our Price Alert feature and get notified when better prices are available.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book With Flexibility

Our users can plan ahead with confidence and find flights with no change fees.

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.