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$395+ 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 1/26. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SIN
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheapflights Tip: The best prices from Portland to Singapore Changi are usually found in September or May, booked 75 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 September 15, 2025.

Round-trip from

$722
(Air Canada)

One-way from

$395
(Air Canada)

Popular in

December

Cheapest in

September

Average price

$753
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 ($173 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 September 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 September 15, 2025.

This Air Canada deal was found by Cheapflights users on 9/12. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1610:00 amPDX - SIN
1 stop30h 05mAir Canada
Tue 9/309:10 amSIN - PDX
1 stop28h 51mAir Canada
Deal found 9/12$718
This Air Canada deal was found by Cheapflights users on 9/12. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/277:00 pmPDX - SIN
2 stops28h 50mAir Canada
Mon 11/39:00 pmSIN - PDX
2 stops28h 15mAir Canada
Deal found 9/12$722
This Air Canada deal was found by Cheapflights users on 9/13. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/297:00 pmPDX - SIN
1 stop21h 00mAir Canada
Wed 11/511:10 pmSIN - PDX
2 stops31h 35mAir Canada
Deal found 9/13$742
This Air Canada deal was found by Cheapflights users on 9/13. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/293:54 pmPDX - SIN
2 stops24h 06mMultiple Airlines
Wed 11/511:10 pmSIN - PDX
2 stops31h 35mMultiple Airlines
Deal found 9/13$757
This Air Canada deal was found by Cheapflights users on 9/13. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/161:45 pmPDX - SIN
2 stops26h 20mMultiple Airlines
Tue 9/306:15 amSIN - PDX
2 stops23h 31mMultiple Airlines
Deal found 9/13$763
This FlightHub deal was found by Cheapflights users on 9/12. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/47:38 pmPDX - SIN
2 stops43h 22mAir Canada
Sat 11/159:00 pmSIN - PDX
2 stops28h 15mAir Canada
Deal found 9/12$771
This FlightHub deal was found by Cheapflights users on 9/12. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/17:38 pmPDX - SIN
2 stops44h 22mAir Canada
Sun 11/169:00 pmSIN - PDX
2 stops28h 15mAir Canada
Deal found 9/12$783
This Air Canada deal was found by Cheapflights users on 9/14. 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.
Sat 11/111:20 pmPDX - SIN
2 stops40h 40mMultiple Airlines
Sun 11/169:00 pmSIN - PDX
2 stops28h 15mMultiple Airlines
Deal found 9/14$794

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 September 15, 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

Mon 10/27

7:00 pm-2:50 pm

2 stops28h 50m

Singapore Changi

Mon 11/3

9:00 pm-9:15 am

2 stops28h 15m

$722

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 2/16

9:50 am-4:55 am

2 stops27h 05m

Singapore Changi

Sun 3/1

8:50 am-6:30 pm

1 stop25h 40m

$743

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 11/4

7:38 pm-7:00 am

2 stops43h 22m

Singapore Changi

Sat 11/15

9:00 pm-9:15 am

2 stops28h 15m

$771

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 11/1

11:20 pm-7:00 am

2 stops40h 40m

Singapore Changi

Sun 11/16

9:00 pm-2:45 pm

2 stops33h 45m

$794

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 9/28

8:31 am-6:10 am

2 stops30h 39m

Singapore Changi

Tue 9/30

9:50 pm-9:16 pm

2 stops38h 26m

$887

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 2/16

9:30 pm-5:45 pm

1 stop28h 15m

Singapore Changi

Sun 3/1

7:00 pm-11:59 pm

1 stop20h 59m

$935

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 1/26

9:50 am-4:55 am

2 stops27h 05m

$395

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 2/23

7:00 pm-12:55 am

2 stops37h 55m

$400

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 2/24

9:40 am-1:00 pm

3 stops35h 20m

$416

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 2/21

2:40 pm-11:40 pm

3 stops41h 00m

$439

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 15 results
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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 September 12, 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 $1,002). Flying from Portland to Singapore in December is currently the most expensive (average of $1,665). 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 September 15, 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 September 15, 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
1,139 reviews

Comfort

8.3

Entertainment

8.2

Overall

8.4

Food

8.1

Crew

8.7

Boarding

8.5

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
1,139 reviews
Korean Air
8.4
Very good
1,139 reviews

Comfort

8.3

Entertainment

8.2

Overall

8.4

Food

8.1

Crew

8.7

Boarding

8.5

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
1,365 reviews
Korean Air
8.4
Very good
1,139 reviews

Comfort

8.3

Entertainment

8.2

Overall

8.4

Food

8.1

Crew

8.7

Boarding

8.5

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
7,956 reviews
Korean Air
8.4
Very good
1,139 reviews

Comfort

8.3

Entertainment

8.2

Overall

8.4

Food

8.1

Crew

8.7

Boarding

8.5

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
8,931 reviews
Korean Air
8.4
Very good
1,139 reviews

Comfort

8.3

Entertainment

8.2

Overall

8.4

Food

8.1

Crew

8.7

Boarding

8.5

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
1,139 reviews

Comfort

8.3

Entertainment

8.2

Overall

8.4

Food

8.1

Crew

8.7

Boarding

8.5

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 28h 50m. 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 Delta and Korean Air, with the lowest prices starting at $800 and $808, respectively. Air Canada is currently priced 31% 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 $1,002). Flying from Portland to Singapore in December is currently the most expensive (average of $1,665). 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$694Average$820FlexibilityNo cancel feeOn-time67%
DeltaCheapest$800Average$921FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$808Average$956FlexibilityNo cancel feeOn-time81%
United AirlinesCheapest$868Average$1,100FlexibilityNo cancel feeOn-time69%
Singapore AirlinesCheapest$891Average$1,143FlexibilityNo cancel feeOn-time81%

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