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Cheap flights from Portland to Singapore from S$ 624

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 11-2. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SIN
17 Sep — 24 Sep1
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 18 August 2026.

Sat 7-1107:04 -
2 stops39h 56m
Fri 13-1100:25 -
2 stops38h 53m
Deal found 17-8S$ 1,258
Thu 10-907:03 -
2 stops32h 07m
Mon 14-921:50 -
2 stops39h 16m
Deal found 13-8S$ 1,281
Wed 11-1107:08 -
2 stops33h 37m
Sun 22-1103:15 -
2 stops32h 33m
Deal found 14-8S$ 1,292
Tue 3-1108:08 -
2 stops32h 37m
Mon 16-1103:15 -
2 stops27h 58m
Deal found 16-8S$ 1,294
Tue 29-907:03 -
1 stop21h 07m
Tue 6-1009:05 -
1 stop19h 27m
Deal found 15-8S$ 1,302
Tue 29-905:07 -
2 stops43h 38m
Mon 5-1003:15 -
2 stops33h 41m
Deal found 15-8S$ 1,306
Thu 1-1011:48 -
2 stops42h 27m
Wed 7-1003:15 -
2 stops34h 47m
Deal found 16-8S$ 1,310
Mon 28-907:09 -
2 stops41h 36m
Tue 13-1003:15 -
2 stops28h 35m
Deal found 15-8S$ 1,318
Sun 27-911:48 -
2 stops36h 57m
Sat 10-1003:15 -
2 stops34h 47m
Deal found 16-8S$ 1,341
Sat 24-1017:48 -
2 stops37h 07m
Thu 29-1009:15 -
1 stop19h 17m
Deal found 15-8S$ 1,342

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 August 2026.

Round-trip from

S$ 1,258

One-way from

S$ 624

Popular in

December

Cheapest in

January

Average price

S$ 1,327
7-11-13-11
  • 7-11-13-11
  • 4 total stops
  • 80h 14m total
  • Portland to Singapore
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11-2
  • 11-2
  • 2 total stops
  • 25h 55m total
  • Portland to Singapore
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (S$ 203 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (S$ 90 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
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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 August 2026.
Use the filters below to find and compare flights from Portland to Singapore that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortlandSingapore

PDX Portland - SIN Singapore Changi

PDXSIN

Portland

Sun 8-11

19:10-11:15

2 stops24h 05m

Singapore Changi

Sun 29-11

08:40-20:46

1 stop28h 06m

S$ 1,406

PortlandSingapore

PDX Portland - SIN Singapore Changi

PDXSIN

Portland

Mon 21-9

05:30-18:35

1 stop22h 05m

Singapore Changi

Fri 25-9

08:45-14:27

1 stop20h 42m

S$ 1,452

PortlandSingapore

PDX Portland - SIN Singapore Changi

PDXSIN

Portland

Wed 30-12

21:30-19:05

1 stop29h 35m

Singapore Changi

Tue 2-2

09:15-20:48

1 stop27h 33m

S$ 1,457

PortlandSingapore

PDX Portland - SIN Singapore Changi

PDXSIN

Portland

Sat 7-11

07:09-20:15

1 stop21h 06m

Singapore Changi

Sat 14-11

22:20-10:18

1 stop27h 58m

S$ 1,457
Fastest return journey

PortlandSingapore

PDX Portland - SIN Singapore Changi

PDXSIN

Portland

Sat 7-11

07:09-20:15

1 stop21h 06m

Singapore Changi

Fri 13-11

22:20-00:44

1 stop18h 24m

S$ 1,463

PortlandSingapore

PDX Portland - SIN Singapore Changi

PDXSIN

Portland

Wed 11-11

05:30-20:15

1 stop22h 45m

Singapore Changi

Mon 23-11

10:10-18:24

1 stop24h 14m

S$ 1,463

PortlandSingapore

PDX Portland - SIN Singapore Changi

PDXSIN

Portland

Mon 28-9

05:30-18:35

1 stop22h 05m

Singapore Changi

Wed 14-10

08:45-21:10

2 stops27h 25m

S$ 1,470

PortlandSingapore

PDX Portland - SIN Singapore Changi

PDXSIN

Portland

Thu 21-1

05:35-20:15

1 stop22h 40m

Singapore Changi

Thu 11-2

10:45-20:33

2 stops25h 48m

S$ 1,471
Cheapest one-way

PortlandSingapore

PDX Portland - SIN Singapore Changi

PDXSIN

Portland

Tue 29-9

14:40-21:30

2 stops39h 50m

S$ 638

PortlandSingapore

PDX Portland - SIN Singapore Changi

PDXSIN

Portland

Thu 27-8

05:30-18:35

1 stop22h 05m

S$ 866

Flights are sorted by cheapest return flights first.

Deals found on 17-8

Showing 1-10 of 18 resultsSorted by cheapest first
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?

To ensure you get the cheapest price possible for a flight from Portland to Singapore, you should look to book at least 89 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, January is the cheapest month in which you can book a flight from Portland to Singapore (average of S$ 1,138). Flying from Portland to Singapore in December is currently the most expensive (average of S$ 2,182). 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?

Airfare is below average for this route at the moment.

Portland to Singapore flights typically cost between S$ 1,263 and S$ 1,583 in November.
The cheapest return price found within the last 5 days was S$ 1,258 on Multiple Airlines (7 Nov–13 Nov).

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 06m. Fly via Air Canada or United 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, January is the cheapest month in which you can book a flight from Portland to Singapore (average of S$ 1,138). Flying from Portland to Singapore in December is currently the most expensive (average of S$ 2,182). 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

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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.

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