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Cheap flights from Portland to Singapore from S$ 418

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 6-8. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SIN
21 Apr — 28 Apr1
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 22 March 2026.

Thu 15-1007:00
PDX
-
SIN
1 stop21h 10m
Singapore Airlines
Wed 21-1009:15
SIN
-
PDX
1 stop22h 35m
Singapore Airlines
Deal found 17-3S$ 1,088
Thu 1-1007:00
PDX
-
SIN
1 stop21h 10m
Singapore Airlines
Sat 10-1009:15
SIN
-
PDX
1 stop19h 35m
Singapore Airlines
Deal found 17-3S$ 1,143
Wed 22-417:51
PDX
-
SIN
2 stops59h 19m
Multiple Airlines
Sun 3-523:10
SIN
-
PDX
2 stops39h 34m
Multiple Airlines
Deal found 17-3S$ 1,159
Sat 15-807:00
PDX
-
SIN
1 stop21h 10m
Singapore Airlines
Mon 31-820:45
SIN
-
PDX
1 stop27h 40m
Singapore Airlines
Deal found 20-3S$ 1,193
Wed 2-907:00
PDX
-
SIN
1 stop21h 10m
Singapore Airlines
Fri 18-909:00
SIN
-
PDX
1 stop22h 37m
Singapore Airlines
Deal found 17-3S$ 1,213
Thu 3-907:00
PDX
-
SIN
1 stop21h 10m
Singapore Airlines
Fri 11-909:00
SIN
-
PDX
1 stop22h 37m
Singapore Airlines
Deal found 21-3S$ 1,227
Thu 15-1017:35
PDX
-
SIN
2 stops24h 30m
Multiple Airlines
Wed 21-1023:05
SIN
-
PDX
2 stops35h 01m
Multiple Airlines
Deal found 17-3S$ 1,228
Thu 3-906:54
PDX
-
SIN
2 stops25h 26m
ANA
Fri 11-906:15
SIN
-
PDX
2 stops23h 32m
ANA
Deal found 21-3S$ 1,247
Wed 2-1221:50
PDX
-
SIN
1 stop29h 15m
Multiple Airlines
Fri 18-1209:00
SIN
-
PDX
1 stop17h 50m
Multiple Airlines
Deal found 18-3S$ 1,263
Wed 22-405:30
PDX
-
SIN
2 stops26h 50m
ANA
Fri 1-500:50
SIN
-
PDX
2 stops29h 07m
ANA
Deal found 19-3S$ 1,268
Wed 2-1214:30
PDX
-
SIN
1 stop23h 15m
Singapore Airlines
Fri 18-1209:00
SIN
-
PDX
1 stop19h 22m
Singapore Airlines
Deal found 19-3S$ 1,279

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 22 March 2026.

Round-trip from

S$ 1,159

One-way from

S$ 418

Popular in

December

Cheapest in

May

Average price

S$ 1,254
22-4-3-5
  • 22-4-3-5
  • 4 total stops
  • 98h 53m total
  • Portland to Singapore
Search Deals
Philippine Airlines
  • Philippine Airlines
  • 6-8
  • 2 total stops
  • 24h 35m total
  • Portland to Singapore
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (S$ 257 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (S$ 97 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 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 22 March 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 - SIN

PDXSIN

Portland

Mon 18-5

07:00-05:25

2 stops31h 25m

Singapore Changi

Tue 9-6

23:10-23:59

2 stops39h 49m

S$ 1,374

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 18-5

19:45-14:30

2 stops27h 45m

Singapore Changi

Tue 9-6

07:00-19:05

1 stop27h 05m

S$ 1,484

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Fri 8-5

05:30-18:35

1 stop22h 05m

Singapore Changi

Tue 19-5

09:00-18:46

1 stop24h 46m

S$ 1,543

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 22-4

07:15-18:35

1 stop20h 20m

Singapore Changi

Sun 3-5

09:00-16:33

1 stop22h 33m

S$ 1,543

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 18-5

05:30-18:35

1 stop22h 05m

Singapore Changi

Tue 9-6

08:45-22:49

1 stop29h 04m

S$ 1,543

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 2-9

12:50-06:15

2 stops26h 25m

Singapore Changi

Fri 18-9

20:35-00:47

1 stop19h 12m

S$ 1,550
Fastest return journey

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 22-4

07:15-18:35

1 stop20h 20m

Singapore Changi

Sat 2-5

20:35-00:59

1 stop19h 24m

S$ 1,613
Cheapest one-way

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 30-8

13:30-09:05

2 stops28h 35m

S$ 418

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 18-4

17:30-17:35

2 stops33h 05m

S$ 682

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 6-8

07:00-05:30

2 stops31h 30m

S$ 715

Flights are sorted by cheapest return flights first.

Deals found on 18-3

Showing 1-10 of 14 resultsSorted by cheapest first
1
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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 13 March 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$ 888). Flying from Portland to Singapore in July is currently the most expensive (average of S$ 1,132). 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 22h 05m. 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, September is the cheapest month in which you can book a flight from Portland to Singapore (average of S$ 888). Flying from Portland to Singapore in July is currently the most expensive (average of S$ 1,132). 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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