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$358+ 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 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SIN
Aug 25 — Sep 11
Mon 8/25
Mon 9/1
1 adult, Economy
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Cheapflights Tip: The best prices from Portland to Singapore Changi are usually found in September or November, booked 73 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

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 August 20, 2025.

Round-trip from

$718
(Air Canada)

One-way from

$358
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$1,037
From Portland to Singapore Changi
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One-way flight from Portland to Singapore Changi
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Highest demand for flights based on searches. 14% potential increase in price ($175 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($62 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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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 August 20, 2025.

This Air Canada deal was found by Cheapflights users on 8/18. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/283:15 pmPDX - SIN
1 stop24h 45mAir Canada
Tue 11/118:50 amSIN - PDX
1 stop25h 40mAir Canada
Deal found 8/18$718
This Orbitz deal was found by Cheapflights users on 8/20. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/263:44 pmPDX - SIN
2 stops24h 21mAir Canada
Thu 11/68:50 amSIN - PDX
1 stop25h 40mAir Canada
Deal found 8/20$723
This Air Canada deal was found by Cheapflights users on 8/18. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/199:50 amPDX - SIN
1 stop29h 10mAir Canada
Tue 3/38:30 amSIN - PDX
2 stops26h 00mAir Canada
Deal found 8/18$725
This Air Canada deal was found by Cheapflights users on 8/18. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/410:00 amPDX - SIN
2 stops23h 45mAir Canada
Thu 9/259:10 amSIN - PDX
1 stop24h 36mAir Canada
Deal found 8/18$731
This Air Canada deal was found by Cheapflights users on 8/18. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/176:15 amPDX - SIN
2 stops27h 30mAir Canada
Tue 9/306:15 amSIN - PDX
2 stops23h 31mAir Canada
Deal found 8/18$745
This Air Canada deal was found by Cheapflights users on 8/19. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/176:15 amPDX - SIN
2 stops27h 30mAir Canada
Sat 9/279:10 amSIN - PDX
1 stop28h 51mAir Canada
Deal found 8/19$749

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 August 20, 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 10/30

9:50 am-7:00 am

1 stop30h 10m

Singapore Changi

Thu 11/27

8:50 am-6:30 pm

1 stop25h 40m

$718

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 10/28

3:15 pm-7:00 am

1 stop24h 45m

Singapore Changi

Tue 11/11

8:50 am-6:30 pm

1 stop25h 40m

$718

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 9/16

7:40 pm-7:05 am

1 stop20h 25m

Singapore Changi

Tue 9/30

9:10 am-11:01 pm

1 stop28h 51m

$718

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 11/19

9:50 am-7:00 am

1 stop29h 10m

Singapore Changi

Tue 3/3

8:30 am-6:30 pm

2 stops26h 00m

$725

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 10/15

11:07 am-6:55 pm

2 stops40h 48m

$358

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 11/6

9:50 am-12:55 am

2 stops23h 05m

$401

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 10/2

5:08 pm-3:45 am

3 stops43h 37m

$427

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 9/18

7:40 pm-7:05 am

1 stop20h 25m

$447

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 9/18

7:40 pm-12:50 am

2 stops38h 10m

$475

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 11/1

11:16 pm-7:00 am

2 stops40h 44m

$476

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/18

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 August 8, 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 72 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, October is the cheapest month in which you can book a flight from Portland to Singapore (average of $996). Flying from Portland to Singapore in December is currently the most expensive (average of $1,684). 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 August 20, 2025.

It’s optimal to fly from Portland to Singapore at noon. By choosing this option you can save up to 16% on the cost of your flight, compared to a flight in the afternoon.

What is the cheapest day to fly from Portland to Singapore?

Use this chart to determine the cheapest time to fly round-trip from Portland to Singapore. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Portland to Singapore flight should consider departing on Monday at noon when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 August 20, 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
1,131 reviews

Food

8.1

Boarding

8.5

Crew

8.7

Comfort

8.3

Entertainment

8.2

Overall

8.4

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
1,131 reviews
Korean Air
8.4
Very good
1,131 reviews

Food

8.1

Boarding

8.5

Crew

8.7

Comfort

8.3

Entertainment

8.2

Overall

8.4

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
1,347 reviews
Korean Air
8.4
Very good
1,131 reviews

Food

8.1

Boarding

8.5

Crew

8.7

Comfort

8.3

Entertainment

8.2

Overall

8.4

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
8.0
Very good
7,982 reviews
Korean Air
8.4
Very good
1,131 reviews

Food

8.1

Boarding

8.5

Crew

8.7

Comfort

8.3

Entertainment

8.2

Overall

8.4

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
8,928 reviews
Korean Air
8.4
Very good
1,131 reviews

Food

8.1

Boarding

8.5

Crew

8.7

Comfort

8.3

Entertainment

8.2

Overall

8.4

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
10,000 reviews
Korean Air
8.4
Very good
1,131 reviews

Food

8.1

Boarding

8.5

Crew

8.7

Comfort

8.3

Entertainment

8.2

Overall

8.4

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 30h 10m. 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 United Airlines and Delta, with the lowest prices starting at $797 and $800, respectively. Air Canada is currently priced 33% 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, October is the cheapest month in which you can book a flight from Portland to Singapore (average of $996). Flying from Portland to Singapore in December is currently the most expensive (average of $1,684). 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.
Eugene to Singapore flights
Boise 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 August 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$694Average$828FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$797Average$1,059FlexibilityNo cancel feeOn-time69%
DeltaCheapest$800Average$921FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$808Average$956FlexibilityNo cancel feeOn-time81%
Singapore AirlinesCheapest$911Average$1,216FlexibilityNo cancel feeOn-time81%

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