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$413+ Cheap flights from Portland (PDX) to Singapore (SIN)

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 8/6. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SIN
Aug 16 — Aug 231
Sun 8/16
Sun 8/23
1 adult, Economy
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Cheap flight deals from Portland to Singapore

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 July 17, 2026.

This FlightHub deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/317:03 am
PDX
-
SIN
2 stops28h 22m
Multiple Airlines
Tue 9/812:55 am
SIN
-
PDX
2 stops30h 41m
Multiple Airlines
Deal found 7/16$995
This oojo deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/312:01 pm
PDX
-
SIN
2 stops28h 44m
Qatar Airways
Mon 11/163:15 am
SIN
-
PDX
2 stops28h 10m
Qatar Airways
Deal found 7/13$997
This Cheapflightsfares deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/111:48 am
PDX
-
SIN
2 stops36h 57m
Qatar Airways
Wed 9/93:15 am
SIN
-
PDX
2 stops31h 35m
Qatar Airways
Deal found 7/16$1,012
This FlightHub deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3111:48 am
PDX
-
SIN
2 stops42h 27m
Qatar Airways
Tue 9/83:15 am
SIN
-
PDX
2 stops33h 46m
Qatar Airways
Deal found 7/17$1,024
This oojo deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/271:59 pm
PDX
-
SIN
2 stops40h 16m
Qatar Airways
Tue 10/67:40 pm
SIN
-
PDX
2 stops36h 20m
Qatar Airways
Deal found 7/15$1,029
This Expedia deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/277:40 pm
PDX
-
SIN
2 stops36h 55m
Multiple Airlines
Tue 10/67:00 am
SIN
-
PDX
1 stop22h 51m
Multiple Airlines
Deal found 7/13$1,031
This Kiwi.com deal was found by Cheapflights users on 7/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/207:03 am
PDX
-
SIN
1 stop21h 07m
Multiple Airlines
Thu 8/2711:00 pm
SIN
-
PDX
2 stops49h 07m
Multiple Airlines
Deal found 7/12$1,036
This oojo deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2612:39 pm
PDX
-
SIN
2 stops29h 11m
Qatar Airways
Sun 10/43:15 am
SIN
-
PDX
2 stops28h 45m
Qatar Airways
Deal found 7/15$1,045
This FlightHub deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/310:00 am
PDX
-
SIN
1 stop29h 00m
Air Canada
Tue 11/178:40 am
SIN
-
PDX
2 stops31h 55m
Air Canada
Deal found 7/15$1,049
This Trip.com deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2710:10 am
PDX
-
SIN
1 stop28h 05m
Air Canada
Thu 9/37:00 am
SIN
-
PDX
1 stop22h 51m
Air Canada
Deal found 7/13$1,050

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 July 17, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$995
(FlightHub)

One-way from

$413
(oojo)

Popular in

December

Cheapest in

January

Average price

$1,098
Provider with most accurate pricing for Portland-Singapore Changi flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Singapore Changi flights.
Search Deals
From Portland to Singapore Changi
Search Deals
One-way flight from Portland to Singapore Changi
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($119 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($62 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated July 17, 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 round-trip
Quickest round-trip

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 12/1

7:30 am-8:15 pm

1 stop20h 45m

Singapore Changi

Fri 12/18

10:10 am-10:35 pm

1 stop28h 25m

$1,146

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 8/5

5:15 am-6:35 pm

1 stop22h 20m

Singapore Changi

Wed 8/19

8:45 am-10:45 pm

1 stop29h 00m

$1,146

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 8/17

11:15 am-6:15 am

1 stop28h 00m

Singapore Changi

Tue 9/1

8:35 pm-10:11 am

1 stop28h 36m

$1,146

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 8/3

5:53 pm-6:15 am

1 stop21h 22m

Singapore Changi

Wed 8/19

8:35 pm-10:11 am

1 stop28h 36m

$1,146

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 10/26

1:15 pm-7:00 am

2 stops26h 45m

Singapore Changi

Thu 10/29

10:10 am-9:08 pm

2 stops25h 58m

$1,150

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 8/15

5:30 am-6:35 pm

1 stop22h 05m

Singapore Changi

Mon 8/31

8:35 pm-5:50 pm

2 stops36h 15m

$1,150
Cheapest one-way

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 9/2

1:59 pm-9:05 am

2 stops28h 06m

$422

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 8/6

5:30 pm-9:05 am

2 stops24h 35m

$440

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 8/5

5:36 pm-9:30 pm

2 stops36h 54m

$495

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 9/2

5:56 pm-1:50 pm

3 stops52h 54m

$534

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/12

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

Compare providers for flights from Portland to Singapore

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to Singapore in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Portland-Singapore flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland-Singapore flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland-Singapore flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland-Singapore flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland-Singapore flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 round-trip 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?

The price you pay for your flight from Portland to Singapore may vary depending on when you book. For the best chance of a lower fare, look to book 89 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 $857). Flying from Portland to Singapore in December is currently the most expensive (average of $1,768). 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 to fly round-trip from Portland to Singapore?

Reviews of airlines servicing Singapore

Get insights into the airlines that provide service to Singapore. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Singapore. Reviews last updated July 17, 2026.
Get a feel of what it's like to fly with Singapore Airlines,United Airlines, andAir Canada from Portland to Singapore by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.2
Very good
1,573 reviews

Entertainment

8.1

Boarding

8.3

Food

7.8

Comfort

8.0

Crew

8.6

Overall

8.2

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.
Singapore Airlines
8.2
Very good
1,573 reviews
Singapore Airlines
8.2
Very good
1,573 reviews

Entertainment

8.1

Boarding

8.3

Food

7.8

Comfort

8.0

Crew

8.6

Overall

8.2

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.
United Airlines
7.4
Good
10,007 reviews
Singapore Airlines
8.2
Very good
1,573 reviews

Entertainment

8.1

Boarding

8.3

Food

7.8

Comfort

8.0

Crew

8.6

Overall

8.2

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.
Air Canada
7.1
Good
11,352 reviews
Singapore Airlines
8.2
Very good
1,573 reviews

Entertainment

8.1

Boarding

8.3

Food

7.8

Comfort

8.0

Crew

8.6

Overall

8.2

Reviews

1 / 20
2.0
Mediocre

Ketan,Nov 2024

SEA - SIN

Sin to amd was not good flight. Food was bad. It was like few days old.

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 20h 45m. Fly via United Airlines to get the fastest option. Airlines will cover a distance of 8123 mi.

  • What are the cheapest airlines flying from Portland to Singapore round-trip?

    Flying on Air Canada is currently your cheapest option to Singapore, with prices starting at $726. Additional round-trip tickets that might be worth considering are offered by Singapore Airlines and United Airlines, with the lowest prices starting at $789 and $1,024, respectively. Air Canada is currently priced 33% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Portland to Singapore one-way?

    The cheapest airlines for a one-way flight from Portland to Singapore are Air Canada ($387), ANA ($420), and Qatar Airways ($524).

  • 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 vacation 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 $857). Flying from Portland to Singapore in December is currently the most expensive (average of $1,768). 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.

Top 3 airlines flying from Portland to Singapore

Discover the top 3 airlines that operate flights from Portland to Singapore. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 17, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$726Average$997FlexibilityNo cancel feeOn-time67%
Singapore AirlinesCheapest$789Average$996FlexibilityNo cancel feeOn-time81%
United AirlinesCheapest$1,024Average$1,201FlexibilityNo cancel feeOn-time69%

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