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$436+ 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 4/17. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SIN
feb. 18 — feb. 251
mié. 2/18
mié. 2/25
1 adult, Economy
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Cheap 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 enero 19, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$815
(oojo)

One-way from

$436
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$879
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. 14% potential increase in price ($168 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($63 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Find 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 enero 19, 2026.

This oojo deal was found by Cheapflights users on 1/18. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/276:07 am
PDX
-
SIN
1 stop20h 38m
Singapore Airlines
lun. 11/169:15 am
SIN
-
PDX
1 stop27h 33m
Singapore Airlines
Deal found 1/18$772
This oojo deal was found by Cheapflights users on 1/18. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/287:00 am
PDX
-
SIN
1 stop21h 05m
Singapore Airlines
lun. 11/169:15 am
SIN
-
PDX
1 stop27h 33m
Singapore Airlines
Deal found 1/18$789
This oojo deal was found by Cheapflights users on 1/18. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 5/202:48 pm
PDX
-
SIN
1 stop23h 27m
Singapore Airlines
mar. 5/269:00 am
SIN
-
PDX
1 stop27h 34m
Singapore Airlines
Deal found 1/18$815
This oojo deal was found by Cheapflights users on 1/18. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/157:05 am
PDX
-
SIN
1 stop21h 05m
Singapore Airlines
sáb. 5/29:15 am
SIN
-
PDX
1 stop22h 07m
Singapore Airlines
Deal found 1/18$832
This oojo deal was found by Cheapflights users on 1/17. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 2/179:48 pm
PDX
-
SIN
1 stop29h 17m
Singapore Airlines
mié. 3/49:15 am
SIN
-
PDX
1 stop20h 22m
Singapore Airlines
Deal found 1/17$874
This Singapore Airlines deal was found by Cheapflights users on 1/19. 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 Singapore Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/276:07 am
PDX
-
SIN
1 stop20h 38m
Multiple Airlines
lun. 11/169:15 am
SIN
-
PDX
1 stop20h 35m
Multiple Airlines
Deal found 1/19$881
This oojo deal was found by Cheapflights users on 1/17. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 4/265:30 pm
PDX
-
SIN
2 stops28h 10m
STARLUX Airlines
mar. 5/52:00 pm
SIN
-
PDX
2 stops23h 53m
STARLUX Airlines
Deal found 1/17$917
This FlightHub deal was found by Cheapflights users on 1/17. 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.
sáb. 8/155:36 pm
PDX
-
SIN
2 stops28h 04m
STARLUX Airlines
lun. 8/312:00 pm
SIN
-
PDX
2 stops25h 10m
STARLUX Airlines
Deal found 1/17$922
This oojo deal was found by Cheapflights users on 1/19. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 5/27:00 am
PDX
-
SIN
1 stop21h 10m
Singapore Airlines
jue. 5/79:00 am
SIN
-
PDX
1 stop18h 52m
Singapore Airlines
Deal found 1/19$930
This oojo deal was found by Cheapflights users on 1/19. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 5/25:30 pm
PDX
-
SIN
2 stops28h 10m
STARLUX Airlines
jue. 5/72:00 pm
SIN
-
PDX
2 stops23h 53m
STARLUX Airlines
Deal found 1/19$936

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 enero 19, 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

jue. 3/26

7:05 am-7:05 pm

1 stop21h 00m

Singapore Changi

sáb. 4/18

9:00 am-9:38 pm

1 stop27h 38m

$981

PortlandSingapore

PDX - SIN

PDXSIN

Portland

mié. 2/18

8:30 am-8:45 am

2 stops32h 15m

Singapore Changi

mié. 3/4

8:15 pm-10:41 pm

2 stops42h 26m

$993

PortlandSingapore

PDX - SIN

PDXSIN

Portland

jue. 3/12

2:30 pm-1:25 pm

2 stops31h 55m

Singapore Changi

lun. 3/23

2:45 pm-9:50 am

2 stops34h 05m

$1,018

PortlandSingapore

PDX - SIN

PDXSIN

Portland

jue. 3/5

5:30 am-8:15 pm

1 stop22h 45m

Singapore Changi

jue. 3/12

10:10 am-11:04 pm

1 stop27h 54m

$1,026

PortlandSingapore

PDX - SIN

PDXSIN

Portland

jue. 3/12

1:39 pm-7:00 am

1 stop26h 21m

Singapore Changi

lun. 3/23

10:10 am-6:48 pm

1 stop23h 38m

$1,026

PortlandSingapore

PDX - SIN

PDXSIN

Portland

lun. 2/16

7:30 am-8:15 pm

1 stop20h 45m

Singapore Changi

mié. 3/4

10:10 am-12:38 pm

1 stop18h 28m

$1,026

PortlandSingapore

PDX - SIN

PDXSIN

Portland

mié. 2/18

1:18 pm-8:00 am

2 stops26h 42m

Singapore Changi

mié. 3/4

10:10 am-12:38 pm

1 stop18h 28m

$1,030

PortlandSingapore

PDX - SIN

PDXSIN

Portland

jue. 3/26

5:30 am-8:15 pm

1 stop23h 45m

Singapore Changi

lun. 4/6

8:35 pm-5:45 pm

2 stops36h 10m

$1,030

PortlandSingapore

PDX - SIN

PDXSIN

Portland

jue. 3/12

1:39 pm-7:00 am

1 stop26h 21m

Singapore Changi

sáb. 3/21

10:10 am-11:09 pm

1 stop27h 59m

$1,040

PortlandSingapore

PDX - SIN

PDXSIN

Portland

jue. 2/19

7:30 am-8:15 pm

1 stop20h 45m

Singapore Changi

dom. 3/8

10:10 am-10:04 pm

1 stop27h 54m

$1,040

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/19

Showing 1-10 of 20 results
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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
oojoPrice 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Portland-Singapore flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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?

Use this chart to determine the optimal time to book a round-trip flight from Portland to Singapore. Price data was last updated on January 16, 2026.

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 5 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, September is the cheapest month in which you can book a flight from Portland to Singapore (average of $693). Flying from Portland to Singapore in December is currently the most expensive (average of $827). 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 enero 19, 2026.
Get a feel of what it's like to fly with Korean Air, Singapore Airlines, and Delta 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.
Korean Air
8.4
Very good
1,187 reviews

Crew

8.7

Overall

8.4

Entertainment

8.2

Food

8.1

Boarding

8.5

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Korean Air
8.4
Very good
1,187 reviews
Korean Air
8.4
Very good
1,187 reviews

Crew

8.7

Overall

8.4

Entertainment

8.2

Food

8.1

Boarding

8.5

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Singapore Airlines
8.1
Very good
1,431 reviews
Korean Air
8.4
Very good
1,187 reviews

Crew

8.7

Overall

8.4

Entertainment

8.2

Food

8.1

Boarding

8.5

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Delta
7.9
Good
8,075 reviews
Korean Air
8.4
Very good
1,187 reviews

Crew

8.7

Overall

8.4

Entertainment

8.2

Food

8.1

Boarding

8.5

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
United Airlines
7.4
Good
9,177 reviews
Korean Air
8.4
Very good
1,187 reviews

Crew

8.7

Overall

8.4

Entertainment

8.2

Food

8.1

Boarding

8.5

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!
Air Canada
7.1
Good
10,635 reviews
Korean Air
8.4
Very good
1,187 reviews

Crew

8.7

Overall

8.4

Entertainment

8.2

Food

8.1

Boarding

8.5

Comfort

8.3

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!

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 45m. Fly via Qatar Airways or United Airlines to get the fastest option. Airlines will cover a distance of 8123 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 $694. Additional round-trip tickets that might be worth considering are offered by Singapore Airlines and Korean Air, with the lowest prices starting at $789 and $792, respectively. Air Canada is currently priced 30% below the average price you’ll pay for this route.

  • 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, September is the cheapest month in which you can book a flight from Portland to Singapore (average of $693). Flying from Portland to Singapore in December is currently the most expensive (average of $827). 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.

Alternative routes for Portland to Singapore

See prices for flight routes from nearby airports that may be better suited for you.
Boise to Singapore flights
Eugene to Singapore flights

Top 5 airlines flying from Portland to Singapore

Discover the top 5 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 enero 19, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$694Average$838FlexibilityNo cancel feeOn-time67%
Singapore AirlinesCheapest$789Average$1,081FlexibilityNo cancel feeOn-time81%
Korean AirCheapest$792Average$943FlexibilityNo cancel feeOn-time81%
DeltaCheapest$800Average$921FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$869Average$1,034FlexibilityNo cancel feeOn-time69%

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