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Cheap flights from Portland to Singapore from S$ 429

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 28-2. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SIN
22 Mar — 29 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 20 February 2026.

Thu 4-605:00
PDX
-
SIN
1 stop21h 35m
Singapore Airlines
Tue 23-609:15
SIN
-
PDX
1 stop22h 35m
Singapore Airlines
Deal found 17-2S$ 1,048
Fri 5-605:00
PDX
-
SIN
1 stop21h 35m
Singapore Airlines
Tue 23-609:15
SIN
-
PDX
1 stop22h 35m
Singapore Airlines
Deal found 19-2S$ 1,051
Sun 4-1006:07
PDX
-
SIN
1 stop20h 28m
Singapore Airlines
Sun 18-1009:00
SIN
-
PDX
1 stop18h 22m
Singapore Airlines
Deal found 16-2S$ 1,093
Wed 22-407:00
PDX
-
SIN
1 stop21h 10m
Singapore Airlines
Sun 3-509:00
SIN
-
PDX
1 stop25h 34m
Singapore Airlines
Deal found 19-2S$ 1,137
Mon 13-407:14
PDX
-
SIN
2 stops26h 31m
Cathay Pacific
Mon 27-407:20
SIN
-
PDX
2 stops24h 29m
Cathay Pacific
Deal found 17-2S$ 1,164
Wed 22-417:51
PDX
-
SIN
2 stops27h 49m
Multiple Airlines
Sat 2-514:00
SIN
-
PDX
2 stops34h 30m
Multiple Airlines
Deal found 19-2S$ 1,184
Mon 9-317:50
PDX
-
SIN
2 stops27h 05m
Cathay Pacific
Mon 16-314:05
SIN
-
PDX
2 stops34h 37m
Cathay Pacific
Deal found 20-2S$ 1,188
Sat 15-806:15
PDX
-
SIN
1 stop20h 20m
Singapore Airlines
Mon 31-820:45
SIN
-
PDX
1 stop28h 40m
Singapore Airlines
Deal found 18-2S$ 1,189
Sat 15-817:36
PDX
-
SIN
2 stops28h 04m
STARLUX Airlines
Mon 31-814:00
SIN
-
PDX
2 stops25h 10m
STARLUX Airlines
Deal found 16-2S$ 1,194
Sun 4-1010:30
PDX
-
SIN
2 stops34h 55m
Cathay Pacific
Sun 18-1020:05
SIN
-
PDX
2 stops35h 45m
Cathay Pacific
Deal found 16-2S$ 1,199

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 20 February 2026.

Round-trip from

S$ 1,048

One-way from

S$ 429

Popular in

December

Cheapest in

September

Average price

S$ 1,298
Singapore Airlines
  • Singapore Airlines
  • 4-6-23-6
  • 2 total stops
  • 44h 10m total
  • Portland to Singapore
Search Deals
Philippine Airlines
  • Philippine Airlines
  • 28-2
  • 2 total stops
  • 44h 16m total
  • Portland to Singapore
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (S$ 243 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 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 20 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

Sat 15-8

21:30-12:40

2 stops24h 10m

Singapore Changi

Mon 31-8

14:00-09:46

2 stops34h 46m

S$ 1,184

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 22-4

17:51-12:40

2 stops27h 49m

Singapore Changi

Sat 2-5

14:00-09:30

2 stops34h 30m

S$ 1,184

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 15-8

06:15-17:35

1 stop20h 20m

Singapore Changi

Mon 31-8

20:45-09:25

1 stop27h 40m

S$ 1,188

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 15-8

21:30-12:40

2 stops24h 10m

Singapore Changi

Mon 31-8

14:00-00:10

2 stops25h 10m

S$ 1,194

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 22-4

07:00-19:10

1 stop21h 10m

Singapore Changi

Sun 3-5

20:45-09:38

1 stop27h 53m

S$ 1,207

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 28-2

21:19-09:35

2 stops44h 16m

S$ 429

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Fri 6-3

08:30-09:35

2 stops33h 05m

S$ 478

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 2-3

07:30-06:55

2 stops31h 25m

S$ 530

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 17-3

07:05-12:10

3 stops38h 05m

S$ 538

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 24-3

15:15-07:00

1 stop24h 45m

S$ 564

Flights are sorted by cheapest return flights first.

Deals found on 17-2

Showing 1-10 of 16 results
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?

Use this chart to determine the optimal time to book a return flight from Portland to Singapore. Price data was last updated on 18 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$ 879). Flying from Portland to Singapore in December is currently the most expensive (average of S$ 1,048). 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 21h 35m. Fly via Singapore Airlines 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$ 879). Flying from Portland to Singapore in December is currently the most expensive (average of S$ 1,048). 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?

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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