HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Singapore

$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
Jul 20 — Jul 271
Mon 7/20
Mon 7/27
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Portland to Singapore with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 June 20, 2026.

This United Airlines deal was found by Cheapflights users on 6/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1711:15 am
PDX
-
SIN
1 stop28h 00m
United Airlines
Tue 9/18:35 pm
SIN
-
PDX
1 stop28h 36m
United Airlines
Deal found 6/15$891
This United Airlines deal was found by Cheapflights users on 6/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/167:15 pm
PDX
-
SIN
1 stop32h 20m
United Airlines
Thu 8/208:35 pm
SIN
-
PDX
1 stop28h 36m
United Airlines
Deal found 6/19$897
This United Airlines deal was found by Cheapflights users on 6/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1611:15 am
PDX
-
SIN
1 stop40h 20m
United Airlines
Wed 8/198:35 pm
SIN
-
PDX
2 stops31h 39m
United Airlines
Deal found 6/19$901
This United Airlines deal was found by Cheapflights users on 6/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/175:30 am
PDX
-
SIN
1 stop22h 45m
United Airlines
Tue 1/1210:45 am
SIN
-
PDX
2 stops30h 09m
United Airlines
Deal found 6/19$902
This United Airlines deal was found by Cheapflights users on 6/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/163:36 pm
PDX
-
SIN
1 stop36h 39m
United Airlines
Wed 1/1310:45 am
SIN
-
PDX
2 stops30h 09m
United Airlines
Deal found 6/19$907
This FlightHub deal was found by Cheapflights users on 6/18. 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.
Wed 11/117:00 am
PDX
-
SIN
1 stop32h 00m
Air Canada
Tue 12/88:50 am
SIN
-
PDX
1 stop16h 36m
Air Canada
Deal found 6/18$918
This United Airlines deal was found by Cheapflights users on 6/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/159:00 am
PDX
-
SIN
1 stop30h 15m
United Airlines
Mon 8/318:45 am
SIN
-
PDX
1 stop27h 14m
United Airlines
Deal found 6/16$925
This United Airlines deal was found by Cheapflights users on 6/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/155:00 am
PDX
-
SIN
2 stops34h 15m
United Airlines
Tue 8/188:35 pm
SIN
-
PDX
1 stop28h 36m
United Airlines
Deal found 6/19$929
This United Airlines deal was found by Cheapflights users on 6/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/147:00 am
PDX
-
SIN
1 stop20h 35m
United Airlines
Mon 8/178:35 pm
SIN
-
PDX
1 stop41h 10m
United Airlines
Deal found 6/19$931

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 June 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$891
(United Airlines)

One-way from

$413
(United Airlines)

Popular in

December

Cheapest in

January

Average price

$1,295
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. 10% potential increase in price ($127 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($62 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 June 20, 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

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

$891
Quickest round-trip

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 8/15

7:00 am-6:35 pm

1 stop20h 35m

Singapore Changi

Mon 8/31

8:45 am-8:59 pm

1 stop27h 14m

$925

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 11/11

7:10 am-5:00 am

2 stops29h 50m

Singapore Changi

Fri 12/11

10:30 pm-11:52 pm

2 stops41h 22m

$1,004

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 10/25

9:40 am-5:00 am

2 stops28h 20m

Singapore Changi

Wed 3/31

7:30 am-6:43 pm

2 stops26h 13m

$1,004

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 8/15

7:05 am-11:55 pm

2 stops25h 50m

Singapore Changi

Sun 8/30

1:25 am-5:14 pm

2 stops30h 49m

$1,004

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 12/2

7:10 am-12:10 am

2 stops25h 00m

Singapore Changi

Thu 12/17

1:35 am-7:28 pm

2 stops33h 53m

$1,009

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 11/11

7:10 am-5:00 am

2 stops29h 50m

Singapore Changi

Mon 12/7

10:40 am-4:34 pm

2 stops45h 54m

$1,010
Cheapest one-way

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 11/3

4:25 pm-8:15 pm

2 stops35h 50m

$413

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 8/3

5:53 pm-6:15 am

1 stop21h 22m

$413

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 8/24

3:43 pm-6:15 am

1 stop23h 32m

$413

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/18

Showing 1-10 of 14 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 June.
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 June 20, 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
1,546 reviews

Boarding

8.3

Entertainment

8.1

Overall

8.2

Food

7.8

Crew

8.6

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SYD - SIN

creat a group of Senior (75 above) to allow them board the flight ahead of other groups.
Singapore Airlines
8.2
Very good
1,546 reviews
Singapore Airlines
8.2
Very good
1,546 reviews

Boarding

8.3

Entertainment

8.1

Overall

8.2

Food

7.8

Crew

8.6

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SYD - SIN

creat a group of Senior (75 above) to allow them board the flight ahead of other groups.
United Airlines
7.4
Good
9,867 reviews
Singapore Airlines
8.2
Very good
1,546 reviews

Boarding

8.3

Entertainment

8.1

Overall

8.2

Food

7.8

Crew

8.6

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SYD - SIN

creat a group of Senior (75 above) to allow them board the flight ahead of other groups.
Air Canada
7.1
Good
11,226 reviews
Singapore Airlines
8.2
Very good
1,546 reviews

Boarding

8.3

Entertainment

8.1

Overall

8.2

Food

7.8

Crew

8.6

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SYD - SIN

creat a group of Senior (75 above) to allow them board the flight ahead of other groups.

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. 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 $718. Additional round-trip tickets that might be worth considering are offered by Singapore Airlines and United Airlines, with the lowest prices starting at $837 and $1,024, respectively. Air Canada is currently priced 34% 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 June 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$718Average$1,004FlexibilityNo cancel feeOn-time67%
Singapore AirlinesCheapest$837Average$998FlexibilityNo cancel feeOn-time81%
United AirlinesCheapest$1,024Average$1,324FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.