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Cheap flights from Portland to Singapore from S$ 415

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 11-3. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SIN
5 Feb — 12 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap 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 6 January 2026.

Round-trip from

S$ 989

One-way from

S$ 415

Popular in

December

Cheapest in

September

Average price

S$ 1,117
Air Canada
  • Air Canada
  • 9-4-30-4
  • 2 total stops
  • 41h 50m total
  • Portland to Singapore
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11-3
  • 11-3
  • 2 total stops
  • 26h 43m total
  • Portland to Singapore
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Highest demand for flights based on searches. 14% potential increase in price (S$ 277 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (S$ 104 potential savings vs. average return price).
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Average for round-trip flights in January 2026
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Find 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 6 January 2026.

Thu 9-419:05PDX - SIN
1 stop19h 10mAir Canada
Thu 30-407:00SIN - PDX
1 stop22h 40mAir Canada
Deal found 4-1S$ 989
Mon 6-419:05PDX - SIN
2 stops25h 10mAir Canada
Thu 23-407:00SIN - PDX
1 stop26h 30mAir Canada
Deal found 4-1S$ 991
Mon 6-419:05PDX - SIN
2 stops25h 10mAir Canada
Mon 20-422:50SIN - PDX
2 stops30h 50mAir Canada
Deal found 4-1S$ 1,000
Wed 15-407:05PDX - SIN
1 stop21h 05mSingapore Airlines
Wed 22-409:15SIN - PDX
1 stop19h 32mSingapore Airlines
Deal found 5-1S$ 1,014
Thu 19-315:15PDX - SIN
1 stop24h 45mAir Canada
Mon 20-422:50SIN - PDX
2 stops30h 50mAir Canada
Deal found 5-1S$ 1,016
Wed 8-419:05PDX - SIN
2 stops28h 25mAir Canada
Sat 25-407:00SIN - PDX
1 stop17h 15mAir Canada
Deal found 5-1S$ 1,018
Tue 3-215:15PDX - SIN
1 stop23h 45mAir Canada
Tue 10-208:50SIN - PDX
1 stop25h 40mAir Canada
Deal found 5-1S$ 1,025
Thu 21-519:45PDX - SIN
1 stop18h 30mAir Canada
Tue 16-620:50SIN - PDX
2 stops37h 15mAir Canada
Deal found 3-1S$ 1,026
Tue 3-219:05PDX - SIN
2 stops27h 45mAir Canada
Thu 12-208:50SIN - PDX
1 stop21h 50mAir Canada
Deal found 6-1S$ 1,027

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 6 January 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

Mon 6-4

19:05-11:15

2 stops25h 10m

Singapore Changi

Mon 20-4

22:50-14:40

2 stops30h 50m

S$ 1,000

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 15-4

19:05-14:30

2 stops28h 25m

Singapore Changi

Wed 22-4

22:50-14:40

2 stops30h 50m

S$ 1,000

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 19-3

15:15-11:15

2 stops29h 00m

Singapore Changi

Mon 20-4

22:50-14:40

2 stops30h 50m

S$ 1,018

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 26-3

15:15-07:00

1 stop24h 45m

Singapore Changi

Sun 19-4

22:50-14:40

2 stops30h 50m

S$ 1,032

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 26-3

19:05-14:50

2 stops28h 45m

Singapore Changi

Sat 18-4

07:00-14:40

1 stop22h 40m

S$ 1,053

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 3-2

19:05-14:50

2 stops27h 45m

Singapore Changi

Thu 12-2

08:50-09:15

1 stop16h 25m

S$ 1,054

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Fri 17-4

19:05-12:55

2 stops26h 50m

Singapore Changi

Sat 2-5

06:15-14:45

2 stops23h 30m

S$ 1,081

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 21-5

07:00-05:15

2 stops31h 15m

Singapore Changi

Wed 17-6

22:50-14:51

2 stops31h 01m

S$ 1,086

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 26-1

09:50-00:55

2 stops23h 05m

Singapore Changi

Thu 29-1

08:50-18:30

1 stop25h 40m

S$ 1,088

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Fri 22-5

10:10-05:15

1 stop28h 05m

Singapore Changi

Sat 13-6

07:00-00:53

2 stops32h 53m

S$ 1,182

Flights are sorted by cheapest return flights first.

Deals found on 5-1

Showing 1-10 of 20 results
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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 2 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$ 891). Flying from Portland to Singapore in December is currently the most expensive (average of S$ 1,063). 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.

How much does it cost for a return flight from Portland to Singapore?

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 21h 05m. Fly via Air Canada or Singapore Airlines 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$ 891). Flying from Portland to Singapore in December is currently the most expensive (average of S$ 1,063). 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

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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

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

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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.

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