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$440+ 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 2/9. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SIN
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Portland to Singapore Changi are usually found in September or May, booked 5 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

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 December 4, 2025.

This Ovago deal was found by Cheapflights users on 12/3. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/145:50 pmPDX - SIN
2 stops43h 50mCathay Pacific
Sat 1/32:05 pmSIN - PDX
2 stops23h 06mCathay Pacific
Deal found 12/3$1,945
This FlightHub deal was found by Cheapflights users on 12/3. 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.
Sun 12/143:15 pmPDX - SIN
1 stop23h 45mAir Canada
Sat 1/38:50 amSIN - PDX
1 stop16h 25mAir Canada
Deal found 12/3$2,639
This FlightHub deal was found by Cheapflights users on 12/2. 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.
Sat 12/203:15 pmPDX - SIN
2 stops31h 35mAir Canada
Wed 1/79:00 pmSIN - PDX
2 stops28h 15mAir Canada
Deal found 12/2$2,658
This Ovago deal was found by Cheapflights users on 12/4. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/205:50 pmPDX - SIN
2 stops26h 05mCathay Pacific
Wed 1/78:15 pmSIN - PDX
2 stops33h 26mCathay Pacific
Deal found 12/4$2,799
This United Airlines deal was found by Cheapflights users on 12/4. 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 12/207:30 amPDX - SIN
1 stop20h 45mUnited Airlines
Wed 1/710:20 pmSIN - PDX
1 stop30h 13mUnited Airlines
Deal found 12/4$2,880

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 December 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$796
(oojo)

One-way from

$440
(oojo)

Popular in

December

Cheapest in

September

Average price

$1,678
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 ($172 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($63 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 4, 2025.
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

Thu 3/19

7:00 pm-7:00 am

1 stop21h 00m

Singapore Changi

Mon 4/20

10:50 pm-2:40 pm

2 stops30h 50m

$802

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 3/2

7:00 pm-2:50 pm

2 stops27h 50m

Singapore Changi

Tue 3/10

6:35 am-6:30 pm

2 stops26h 55m

$840

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 3/2

7:00 pm-11:15 am

2 stops24h 15m

Singapore Changi

Thu 3/12

8:50 am-11:04 pm

2 stops29h 14m

$844

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 3/1

7:00 pm-9:55 pm

2 stops58h 55m

Singapore Changi

Sun 3/8

8:50 am-1:40 pm

1 stop20h 50m

$864

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 1/18

9:50 am-7:00 am

1 stop29h 10m

Singapore Changi

Sun 1/25

8:50 am-6:30 pm

1 stop25h 40m

$872

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 3/2

7:00 pm-11:15 am

2 stops24h 15m

Singapore Changi

Mon 3/9

6:35 am-9:15 am

2 stops41h 40m

$911

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 3/1

7:00 pm-9:55 pm

2 stops58h 55m

Singapore Changi

Mon 3/9

6:35 am-9:15 am

2 stops41h 40m

$916

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 2/16

7:05 am-12:25 am

2 stops25h 20m

Singapore Changi

Sun 3/1

8:15 pm-1:25 pm

2 stops33h 10m

$948

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 3/4

5:45 am-8:15 pm

1 stop22h 30m

Singapore Changi

Wed 3/11

10:10 am-6:47 pm

1 stop23h 37m

$1,025

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 3/2

1:40 pm-8:00 am

1 stop26h 20m

Singapore Changi

Wed 3/11

10:10 am-11:04 pm

1 stop27h 54m

$1,025

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/2

Showing 1-10 of 16 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 December.
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 November 28, 2025.

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 $832). 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.

What is the cheapest time of day to fly from PDX to SIN?

Find hourly flight availability from Portland to Singapore. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 4, 2025.

It’s optimal to fly from Portland to Singapore at noon. By choosing this option you can save up to 15% on the cost of your flight, compared to a flight in the afternoon.

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 December 4, 2025.
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
1,179 reviews

Comfort

8.3

Overall

8.4

Boarding

8.5

Crew

8.7

Food

8.1

Entertainment

8.2

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
1,179 reviews
Korean Air
8.4
Very good
1,179 reviews

Comfort

8.3

Overall

8.4

Boarding

8.5

Crew

8.7

Food

8.1

Entertainment

8.2

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
1,411 reviews
Korean Air
8.4
Very good
1,179 reviews

Comfort

8.3

Overall

8.4

Boarding

8.5

Crew

8.7

Food

8.1

Entertainment

8.2

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
8,011 reviews
Korean Air
8.4
Very good
1,179 reviews

Comfort

8.3

Overall

8.4

Boarding

8.5

Crew

8.7

Food

8.1

Entertainment

8.2

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
9,066 reviews
Korean Air
8.4
Very good
1,179 reviews

Comfort

8.3

Overall

8.4

Boarding

8.5

Crew

8.7

Food

8.1

Entertainment

8.2

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
10,500 reviews
Korean Air
8.4
Very good
1,179 reviews

Comfort

8.3

Overall

8.4

Boarding

8.5

Crew

8.7

Food

8.1

Entertainment

8.2

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 21h. Fly via Air Canada 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 $694. Additional round-trip tickets that might be worth considering are offered by Korean Air and Delta, with the lowest prices starting at $792 and $800, 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 $832). 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.
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 December 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$694Average$822FlexibilityNo cancel feeOn-time67%
Korean AirCheapest$792Average$946FlexibilityNo cancel feeOn-time81%
DeltaCheapest$800Average$921FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$868Average$1,035FlexibilityNo cancel feeOn-time69%
Singapore AirlinesCheapest$873Average$1,126FlexibilityNo cancel feeOn-time81%

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