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Cheap flights from Portland to Singapore from S$ 668

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 20-7. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SIN
4 Jun — 11 Jun1
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 5 May 2026.

Thu 26-1121:59
PDX
-
SIN
1 stop27h 46m
Singapore Airlines
Thu 10-1209:00
SIN
-
PDX
1 stop17h 50m
Singapore Airlines
Deal found 4-5S$ 1,154
Tue 3-1114:30
PDX
-
SIN
1 stop25h 25m
Singapore Airlines
Tue 17-1109:00
SIN
-
PDX
1 stop19h 48m
Singapore Airlines
Deal found 3-5S$ 1,244
Thu 26-1121:59
PDX
-
SIN
1 stop27h 46m
Multiple Airlines
Thu 10-1209:00
SIN
-
PDX
1 stop19h 22m
Multiple Airlines
Deal found 4-5S$ 1,256
Wed 9-913:50
PDX
-
SIN
1 stop24h 25m
Singapore Airlines
Wed 23-909:15
SIN
-
PDX
1 stop26h 35m
Singapore Airlines
Deal found 5-5S$ 1,270
Wed 9-911:45
PDX
-
SIN
2 stops30h 05m
Qatar Airways
Mon 21-903:15
SIN
-
PDX
2 stops33h 46m
Qatar Airways
Deal found 5-5S$ 1,284
Sun 13-907:05
PDX
-
SIN
2 stops47h 10m
Qatar Airways
Wed 23-903:15
SIN
-
PDX
2 stops31h 35m
Qatar Airways
Deal found 2-5S$ 1,287
Tue 29-905:05
PDX
-
SIN
1 stop21h 30m
Singapore Airlines
Mon 5-1009:15
SIN
-
PDX
1 stop26h 35m
Singapore Airlines
Deal found 3-5S$ 1,290
Wed 21-1012:31
PDX
-
SIN
1 stop25h 44m
Multiple Airlines
Mon 26-1009:15
SIN
-
PDX
1 stop19h 35m
Multiple Airlines
Deal found 2-5S$ 1,299
Thu 1-1017:35
PDX
-
SIN
1 stop23h 05m
Singapore Airlines
Sat 10-1009:00
SIN
-
PDX
1 stop18h 22m
Singapore Airlines
Deal found 1-5S$ 1,302
Tue 3-1110:30
PDX
-
SIN
2 stops30h 15m
Qatar Airways
Mon 16-1103:15
SIN
-
PDX
2 stops27h 38m
Qatar Airways
Deal found 3-5S$ 1,315
Thu 26-1109:40
PDX
-
SIN
2 stops31h 05m
Qatar Airways
Tue 8-1203:15
SIN
-
PDX
2 stops27h 40m
Qatar Airways
Deal found 4-5S$ 1,329

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 5 May 2026.

Round-trip from

S$ 1,244

One-way from

S$ 668

Popular in

December

Cheapest in

January

Average price

S$ 1,122
Singapore Airlines
  • Singapore Airlines
  • 13-9-24-9
  • 2 total stops
  • 46h 15m total
  • Portland to Singapore
Search Deals
Qatar Airways
  • Qatar Airways
  • 20-7
  • 2 total stops
  • 47h 56m total
  • Portland to Singapore
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (S$ 247 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (S$ 99 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 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 5 May 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 17-8

21:30-17:35

1 stop29h 05m

Singapore Changi

Tue 1-9

09:15-13:45

1 stop19h 30m

S$ 1,406

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 21-10

13:30-08:50

2 stops28h 20m

Singapore Changi

Sun 25-10

03:15-22:44

2 stops34h 29m

S$ 1,521
Fastest return journey

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 18-5

05:30-18:35

1 stop22h 05m

Singapore Changi

Tue 2-6

20:35-00:50

1 stop19h 15m

S$ 2,087

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 18-5

05:30-18:35

1 stop22h 05m

Singapore Changi

Tue 9-6

20:35-10:20

1 stop28h 45m

S$ 2,094

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 3-9

06:54-18:35

1 stop20h 41m

Singapore Changi

Sun 13-9

08:45-14:47

1 stop21h 02m

S$ 2,157

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 29-10

13:39-07:00

1 stop26h 21m

Singapore Changi

Mon 2-11

22:20-00:54

1 stop18h 34m

S$ 2,347

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 21-10

19:15-06:15

1 stop20h 00m

Singapore Changi

Mon 26-10

10:10-18:31

1 stop23h 21m

S$ 2,349

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 30-5

13:05-15:40

1 stop35h 35m

Singapore Changi

Fri 12-6

00:55-11:10

1 stop25h 15m

S$ 2,396
Cheapest one-way

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 21-7

08:19-21:15

2 stops45h 56m

S$ 668

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 22-7

08:19-08:50

2 stops33h 31m

S$ 738

Flights are sorted by cheapest return flights first.

Deals found on 1-5

Showing 1-10 of 14 resultsSorted by cheapest first
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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?

To ensure you get the cheapest price possible for a flight from Portland to Singapore, you should look to book at least 7 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$ 1,114). Flying from Portland to Singapore in December is currently the most expensive (average of S$ 2,179). 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 22h 05m. Fly via Qatar Airways 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$ 1,114). Flying from Portland to Singapore in December is currently the most expensive (average of S$ 2,179). 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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