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Cheap flights from Portland to Singapore from S$ 590

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 7-1. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SIN
17 Jan — 24 Jan1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Portland to Singapore Changi are usually found in September or May, booked 5 days in advance, depart on a Monday or Tuesday and return on a Monday

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 18 December 2025.

Sat 20-1218:40PDX - SIN
2 stops33h 35mUnited Airlines
Wed 7-122:20SIN - PDX
2 stops35h 50mUnited Airlines
Deal found 18-12S$ 1,499
Wed 17-1213:34PDX - SIN
2 stops42h 06mMultiple Airlines
Wed 24-1220:15SIN - PDX
2 stops40h 45mMultiple Airlines
Deal found 16-12S$ 2,342
Wed 31-1207:30PDX - SIN
1 stop20h 45mUnited Airlines
Tue 6-122:20SIN - PDX
1 stop18h 19mUnited Airlines
Deal found 17-12S$ 2,394
Wed 17-1215:55PDX - SIN
1 stop24h 05mUnited Airlines
Wed 24-1210:10SIN - PDX
1 stop24h 38mUnited Airlines
Deal found 16-12S$ 2,470
Fri 19-1215:15PDX - SIN
2 stops29h 50mMultiple Airlines
Sat 27-1214:05SIN - PDX
2 stops35h 10mMultiple Airlines
Deal found 15-12S$ 2,881

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 18 December 2025.

Round-trip from

S$ 1,008

One-way from

S$ 590

Popular in

December

Cheapest in

September

Average price

S$ 2,167
Air Canada
  • Air Canada
  • 9-4-29-4
  • 3 total stops
  • 48h 55m total
  • Portland to Singapore
Search Deals
7-1
  • 7-1
  • 3 total stops
  • 34h 20m total
  • Portland to Singapore
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (S$ 292 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (S$ 105 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
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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 18 December 2025.
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

Thu 19-3

19:05-07:00

1 stop20h 55m

Singapore Changi

Mon 20-4

23:55-14:40

2 stops29h 45m

S$ 1,043

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 9-4

19:05-05:15

1 stop19h 10m

Singapore Changi

Thu 30-4

07:00-14:40

1 stop22h 40m

S$ 1,074

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 7-4

19:05-05:15

1 stop19h 10m

Singapore Changi

Tue 28-4

07:00-09:15

1 stop17h 15m

S$ 1,074

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 8-4

15:15-14:30

2 stops32h 15m

Singapore Changi

Thu 30-4

07:00-18:30

1 stop26h 30m

S$ 1,077

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 8-4

09:50-11:15

2 stops34h 25m

Singapore Changi

Mon 27-4

06:15-18:30

2 stops27h 15m

S$ 1,092

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 9-4

13:39-05:15

2 stops24h 36m

Singapore Changi

Mon 27-4

06:15-18:30

2 stops27h 15m

S$ 1,096

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Fri 10-4

19:05-05:15

1 stop19h 10m

Singapore Changi

Thu 30-4

07:00-09:15

1 stop17h 15m

S$ 1,107

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Fri 10-4

19:05-05:15

1 stop19h 10m

Singapore Changi

Mon 27-4

06:15-18:30

2 stops27h 15m

S$ 1,123

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 11-4

19:05-11:15

2 stops25h 10m

Singapore Changi

Wed 29-4

06:15-14:40

2 stops23h 25m

S$ 1,125

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Fri 30-1

09:50-11:55

2 stops34h 05m

Singapore Changi

Fri 6-2

08:50-14:40

1 stop21h 50m

S$ 1,156

Flights are sorted by cheapest return flights first.

Deals found on 16-12

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 12 December 2025.

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$ 895). Flying from Portland to Singapore in December is currently the most expensive (average of S$ 1,068). 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 20h 55m. Fly via Air Canada to get the fastest option. The distance between Portland and Singapore is about 13073 km.

  • 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$ 895). Flying from Portland to Singapore in December is currently the most expensive (average of S$ 1,068). 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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