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$449+ 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 8/1. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SIN
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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Cheapflights Tip: The best prices from Portland to Singapore Changi are usually found in September or February, 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 July 3, 2025.

Round-trip from

$735
(Air Canada)

One-way from

$449
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$1,081
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. 11% potential increase in price ($135 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($37 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 3, 2025.

This Air Canada deal was found by Cheapflights users on 6/30. 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 9/43:25 pmPDX - SIN
1 stop24h 40mAir Canada
Thu 9/259:10 amSIN - PDX
1 stop24h 36mAir Canada
Deal found 6/30$735
This FlightHub deal was found by Cheapflights users on 7/1. 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 10/286:00 amPDX - SIN
1 stop20h 45mSingapore Airlines
Tue 11/119:00 amSIN - PDX
1 stop17h 32mSingapore Airlines
Deal found 7/1$755
This FlightHub deal was found by Cheapflights users on 7/2. 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.
Thu 9/48:55 amPDX - SIN
2 stops23h 45mKorean Air
Wed 9/241:10 amSIN - PDX
2 stops28h 41mKorean Air
Deal found 7/2$814
This Gurufare deal was found by Cheapflights users on 7/2. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/217:40 amPDX - SIN
2 stops25h 40mJapan Airlines
Tue 11/118:15 amSIN - PDX
2 stops20h 14mJapan Airlines
Deal found 7/2$836
This Delta deal was found by Cheapflights users on 6/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/219:15 amPDX - SIN
2 stops23h 25mDelta
Sun 7/271:10 amSIN - PDX
2 stops34h 51mDelta
Deal found 6/30$842
This Japan Airlines deal was found by Cheapflights users on 7/3. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/151:16 pmPDX - SIN
2 stops37h 14mMultiple Airlines
Wed 10/298:15 amSIN - PDX
2 stops27h 55mMultiple Airlines
Deal found 7/3$905
This American Airlines deal was found by Cheapflights users on 7/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/48:30 amPDX - SIN
2 stops24h 50mAmerican Airlines
Wed 9/241:55 amSIN - PDX
2 stops27h 28mAmerican Airlines
Deal found 7/3$950

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 July 3, 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 9/4

3:25 pm-7:05 am

1 stop24h 40m

Singapore Changi

Thu 9/25

9:10 am-6:46 pm

1 stop24h 36m

$735

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 10/28

6:00 am-5:45 pm

1 stop20h 45m

Singapore Changi

Tue 11/11

9:00 am-10:32 am

1 stop17h 32m

$755

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 9/4

8:55 am-11:40 pm

2 stops23h 45m

Singapore Changi

Wed 9/24

1:10 am-2:51 pm

2 stops28h 41m

$814

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 10/21

7:40 am-12:20 am

2 stops25h 40m

Singapore Changi

Tue 11/11

8:15 am-12:29 pm

2 stops20h 14m

$836

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 7/21

9:15 am-11:40 pm

2 stops23h 25m

Singapore Changi

Sun 7/27

1:10 am-9:01 pm

2 stops34h 51m

$842

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 10/15

1:16 pm-5:30 pm

2 stops37h 14m

Singapore Changi

Wed 10/29

8:15 am-9:10 pm

2 stops27h 55m

$905

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 9/4

8:30 am-12:20 am

2 stops24h 50m

Singapore Changi

Wed 9/24

1:55 am-2:23 pm

2 stops27h 28m

$950

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Fri 8/1

1:40 pm-7:15 am

2 stops50h 35m

$449

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 11/15

10:00 pm-5:45 pm

1 stop27h 45m

$488

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 7/30

6:15 am-12:45 am

2 stops27h 30m

$492

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 14 results
1
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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 June 27, 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 $1,008). Flying from Portland to Singapore in December is currently the most expensive (average of $1,674). 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 July 3, 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.

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 July 3, 2025.
Get a feel of what it's like to fly with Korean Air, Japan Airlines, and Singapore Airlines 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
1,101 reviews

Comfort

8.3

Food

8.1

Overall

8.4

Crew

8.7

Entertainment

8.2

Boarding

8.5

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Korean Air
8.4
Very good
1,101 reviews
Korean Air
8.4
Very good
1,101 reviews

Comfort

8.3

Food

8.1

Overall

8.4

Crew

8.7

Entertainment

8.2

Boarding

8.5

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Japan Airlines
8.3
Very good
1,505 reviews
Korean Air
8.4
Very good
1,101 reviews

Comfort

8.3

Food

8.1

Overall

8.4

Crew

8.7

Entertainment

8.2

Boarding

8.5

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Singapore Airlines
8.1
Very good
1,320 reviews
Korean Air
8.4
Very good
1,101 reviews

Comfort

8.3

Food

8.1

Overall

8.4

Crew

8.7

Entertainment

8.2

Boarding

8.5

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Alaska Airlines
8.0
Very good
10,000 reviews
Korean Air
8.4
Very good
1,101 reviews

Comfort

8.3

Food

8.1

Overall

8.4

Crew

8.7

Entertainment

8.2

Boarding

8.5

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Delta
8.0
Very good
7,982 reviews
Korean Air
8.4
Very good
1,101 reviews

Comfort

8.3

Food

8.1

Overall

8.4

Crew

8.7

Entertainment

8.2

Boarding

8.5

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

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.

  • 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 $735. Additional round-trip tickets that might be worth considering are offered by Singapore Airlines and Korean Air, with the lowest prices starting at $755 and $814, respectively. Air Canada is currently priced 30% 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 Singapore Airlines ($488), Air Canada ($492), and Korean Air ($548).

  • 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 $1,008). Flying from Portland to Singapore in December is currently the most expensive (average of $1,674). 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.
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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$694Average$817FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$799Average$1,136FlexibilityNo cancel feeOn-time69%
DeltaCheapest$800Average$921FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$930Average$978FlexibilityNo cancel feeOn-time81%
Singapore AirlinesCheapest$978Average$1,284FlexibilityNo cancel feeOn-time81%

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