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Cheap flights from Portland to Singapore from S$ 529

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
15 Jul — 22 Jul1
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 15 June 2026.

Mon 17-807:00
PDX
-
SIN
1 stop20h 35m
United Airlines
Tue 1-908:45
SIN
-
PDX
1 stop21h 12m
United Airlines
Deal found 12-6S$ 1,142
Tue 3-1113:39
PDX
-
SIN
1 stop38h 36m
United Airlines
Tue 10-1110:10
SIN
-
PDX
1 stop20h 17m
United Airlines
Deal found 15-6S$ 1,150
Thu 13-805:30
PDX
-
SIN
1 stop22h 05m
United Airlines
Mon 31-811:05
SIN
-
PDX
2 stops24h 54m
United Airlines
Deal found 12-6S$ 1,155
Wed 4-1105:35
PDX
-
SIN
1 stop22h 40m
United Airlines
Thu 12-1106:35
SIN
-
PDX
2 stops34h 19m
United Airlines
Deal found 15-6S$ 1,165
Thu 13-809:00
PDX
-
SIN
2 stops24h 45m
ANA
Mon 31-806:15
SIN
-
PDX
2 stops23h 32m
ANA
Deal found 12-6S$ 1,169
Tue 3-1118:59
PDX
-
SIN
2 stops33h 16m
United Airlines
Thu 12-1106:35
SIN
-
PDX
2 stops34h 19m
United Airlines
Deal found 15-6S$ 1,170
Sat 15-809:00
PDX
-
SIN
1 stop30h 15m
United Airlines
Mon 31-808:45
SIN
-
PDX
1 stop27h 14m
United Airlines
Deal found 12-6S$ 1,186
Tue 3-1118:59
PDX
-
SIN
2 stops33h 16m
United Airlines
Fri 6-1110:10
SIN
-
PDX
2 stops28h 28m
United Airlines
Deal found 15-6S$ 1,191
Tue 3-1115:30
PDX
-
SIN
1 stop36h 45m
United Airlines
Sat 7-1122:20
SIN
-
PDX
1 stop18h 34m
United Airlines
Deal found 15-6S$ 1,193

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 15 June 2026.

Round-trip from

S$ 1,142

One-way from

S$ 529

Popular in

December

Cheapest in

January

Average price

S$ 1,660
United Airlines
  • United Airlines
  • 17-8-1-9
  • 2 total stops
  • 41h 47m total
  • Portland to Singapore
Search Deals
United Airlines
  • United Airlines
  • 6-8
  • 1 total stop
  • 20h 35m total
  • Portland to Singapore
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (S$ 204 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (S$ 99 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 15 June 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

11:15-06:15

1 stop28h 00m

Singapore Changi

Tue 1-9

20:35-10:11

1 stop28h 36m

S$ 1,142
Fastest return journey

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 4-11

05:35-20:15

1 stop22h 40m

Singapore Changi

Wed 2-12

22:20-00:54

1 stop18h 34m

S$ 1,142

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 13-8

07:00-18:35

1 stop20h 35m

Singapore Changi

Mon 31-8

08:45-20:59

1 stop27h 14m

S$ 1,142

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 15-8

09:00-06:15

1 stop30h 15m

Singapore Changi

Mon 31-8

08:45-22:45

1 stop29h 00m

S$ 1,186
Cheapest one-way
Fastest single journey

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 6-8

07:00-18:35

1 stop20h 35m

S$ 529

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 21-9

13:03-06:15

1 stop26h 12m

S$ 529

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 20-9

09:00-18:35

1 stop42h 35m

S$ 545

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Fri 25-9

05:30-05:00

2 stops32h 30m

S$ 715

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 6-8

05:30-23:55

2 stops27h 25m

S$ 715

Flights are sorted by cheapest return flights first.

Deals found on 15-6

Sorted by cheapest first

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$ 1,099). Flying from Portland to Singapore in December is currently the most expensive (average of S$ 2,228). 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 28h. Fly via United 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, January is the cheapest month in which you can book a flight from Portland to Singapore (average of S$ 1,099). Flying from Portland to Singapore in December is currently the most expensive (average of S$ 2,228). 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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