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Cheap flights from Portland to Singapore from S$ 413

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 5-3. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SIN
15 Mar — 22 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 13 February 2026.

Thu 8-1006:07
PDX
-
SIN
1 stop20h 28m
Singapore Airlines
Sun 11-1009:00
SIN
-
PDX
1 stop18h 22m
Singapore Airlines
Deal found 10-2S$ 1,073
Tue 4-817:34
PDX
-
SIN
1 stop23h 16m
Singapore Airlines
Tue 8-909:00
SIN
-
PDX
1 stop18h 22m
Singapore Airlines
Deal found 12-2S$ 1,084
Fri 1-517:49
PDX
-
SIN
1 stop23h 01m
Singapore Airlines
Sat 16-509:00
SIN
-
PDX
1 stop27h 34m
Singapore Airlines
Deal found 10-2S$ 1,097
Thu 19-315:15
PDX
-
SIN
1 stop24h 45m
Air Canada
Mon 20-422:50
SIN
-
PDX
2 stops34h 40m
Air Canada
Deal found 12-2S$ 1,099
Tue 14-407:14
PDX
-
SIN
2 stops26h 31m
Cathay Pacific
Tue 21-407:20
SIN
-
PDX
2 stops24h 10m
Cathay Pacific
Deal found 11-2S$ 1,105
Tue 10-307:16
PDX
-
SIN
2 stops26h 09m
Cathay Pacific
Tue 17-318:00
SIN
-
PDX
2 stops30h 50m
Cathay Pacific
Deal found 9-2S$ 1,114
Sat 15-817:34
PDX
-
SIN
1 stop23h 16m
Singapore Airlines
Mon 31-820:45
SIN
-
PDX
1 stop27h 40m
Singapore Airlines
Deal found 10-2S$ 1,118
Sat 26-905:07
PDX
-
SIN
1 stop21h 28m
Singapore Airlines
Sun 4-1009:00
SIN
-
PDX
1 stop18h 22m
Singapore Airlines
Deal found 11-2S$ 1,119
Thu 8-1013:50
PDX
-
SIN
2 stops28h 15m
Multiple Airlines
Sun 11-1023:05
SIN
-
PDX
2 stops35h 01m
Multiple Airlines
Deal found 10-2S$ 1,127
Fri 9-1006:07
PDX
-
SIN
1 stop20h 28m
Singapore Airlines
Sun 11-1009:00
SIN
-
PDX
1 stop18h 22m
Singapore Airlines
Deal found 10-2S$ 1,129

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 13 February 2026.

Round-trip from

S$ 1,084

One-way from

S$ 413

Popular in

December

Cheapest in

September

Average price

S$ 1,283
Singapore Airlines
  • Singapore Airlines
  • 4-8-8-9
  • 2 total stops
  • 41h 38m total
  • Portland to Singapore
Search Deals
Philippine Airlines
  • Philippine Airlines
  • 5-3
  • 2 total stops
  • 25h 43m total
  • Portland to Singapore
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (S$ 242 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (S$ 98 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 13 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

Fri 1-5

17:49-07:50

1 stop23h 01m

Singapore Changi

Sat 16-5

09:00-21:34

1 stop27h 34m

S$ 1,097

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 3-8

19:45-11:15

2 stops24h 30m

Singapore Changi

Thu 10-9

07:00-19:06

1 stop27h 06m

S$ 1,192

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 4-8

10:10-05:15

1 stop28h 05m

Singapore Changi

Wed 9-9

22:50-14:51

2 stops31h 01m

S$ 1,199

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 4-8

10:10-05:15

1 stop28h 05m

Singapore Changi

Mon 7-9

22:50-14:51

2 stops31h 01m

S$ 1,199

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Fri 13-3

13:36-09:35

2 stops28h 59m

Singapore Changi

Mon 16-3

23:55-21:10

2 stops36h 15m

S$ 1,210

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 11-6

15:25-05:15

1 stop22h 50m

Singapore Changi

Sun 21-6

07:00-19:06

1 stop27h 06m

S$ 1,215

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 2-8

19:45-00:45

2 stops38h 00m

Singapore Changi

Sun 6-9

07:00-14:51

1 stop22h 51m

S$ 1,229

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 11-6

15:25-05:15

1 stop22h 50m

Singapore Changi

Sat 20-6

01:45-09:31

2 stops22h 46m

S$ 1,230

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Fri 7-8

17:36-12:40

2 stops28h 04m

Singapore Changi

Tue 8-9

14:00-00:10

2 stops25h 10m

S$ 1,235

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Fri 7-8

19:45-05:15

1 stop18h 30m

Singapore Changi

Sun 6-9

07:00-19:06

1 stop27h 06m

S$ 1,235

Flights are sorted by cheapest return flights first.

Deals found on 12-2

Showing 1-10 of 19 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 6 February 2026.

To ensure you get the cheapest price possible for a flight from Portland to Singapore, you should look to book at least 8 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$ 874). Flying from Portland to Singapore in December is currently the most expensive (average of S$ 1,044). 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 23h 01m. Fly via Singapore Airlines or Air Canada 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$ 874). Flying from Portland to Singapore in December is currently the most expensive (average of S$ 1,044). 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

Fly with Cheapflights

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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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