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$439+ Cheap flights from Portland (PDX) to Singapore

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 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SIN
May 18 — May 251
Sun 5/18
Sun 5/25
1 adult, Economy
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Cheap flight deals from Portland to Singapore

Keep the following information in mind while searching for Portland to Singapore flight deals. Data was last updated May 13, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$694
(Air Canada)

One-way from

$439
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$992
Provider with most accurate pricing for Portland-Singapore Changi flight deals.
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Provider most trusted by Cheapflights users for Portland-Singapore Changi flights.
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From Portland to Singapore
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One-way flight from Portland to Singapore
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Highest demand for flights based on searches. 10% potential increase in price ($132 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($39 potential savings vs. average RT price).
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Average for round-trip flights in May 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 May 13, 2025.

This Air Canada deal was found by Cheapflights users on 5/12. 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.
Thu 9/43:25 pmPDX - SIN
1 stop24h 40mAir Canada
Thu 9/259:10 amSIN - PDX
1 stop20h 36mAir Canada
Deal found 5/12$694
This FlightHub deal was found by Cheapflights users on 5/12. 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 9/233:25 pmPDX - SIN
1 stop24h 40mMultiple Airlines
Wed 10/88:00 amSIN - PDX
2 stops29h 56mMultiple Airlines
Deal found 5/12$734
This StudentUniverse deal was found by Cheapflights users on 5/11. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/265:36 pmPDX - SIN
1 stop34h 34mSingapore Airlines
Wed 9/109:15 amSIN - PDX
1 stop19h 19mSingapore Airlines
Deal found 5/11$893
This oojo deal was found by Cheapflights users on 5/11. 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.
Tue 8/267:21 amPDX - SIN
2 stops26h 29mCathay Pacific
Wed 9/106:00 pmSIN - PDX
2 stops30h 47mCathay Pacific
Deal found 5/11$1,000
This oojo deal was found by Cheapflights users on 5/12. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/310:40 amPDX - SIN
2 stops22h 40mJapan Airlines
Wed 9/108:05 amSIN - PDX
2 stops20h 39mJapan Airlines
Deal found 5/12$1,018
This United Airlines deal was found by Cheapflights users on 5/11. 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.
Mon 8/255:30 amPDX - SIN
1 stop21h 55mUnited Airlines
Thu 9/118:45 amSIN - PDX
1 stop20h 57mUnited Airlines
Deal found 5/11$1,024
This Delta deal was found by Cheapflights users on 5/11. 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.
Thu 8/285:30 amPDX - SIN
2 stops27h 10mDelta
Mon 9/87:30 amSIN - PDX
2 stops28h 19mDelta
Deal found 5/11$1,038
This Gurufare deal was found by Cheapflights users on 5/12. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/16:00 amPDX - SIN
2 stops27h 10mKorean Air
Sat 11/151:30 amSIN - PDX
2 stops27h 49mKorean Air
Deal found 5/12$1,102
This oojo deal was found by Cheapflights users on 5/12. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/209:50 pmPDX - SIN
2 stops47h 15mChina Airlines
Wed 1/72:15 pmSIN - PDX
2 stops35h 20mChina Airlines
Deal found 5/12$1,880
This Cheapflightsfares deal was found by Cheapflights users on 5/12. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/237:25 pmPDX - SIN
1 stop31h 45mMalaysia Airlines
Tue 10/71:10 amSIN - PDX
1 stop31h 25mMalaysia Airlines
Deal found 5/12$1,946

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 May 13, 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-2:46 pm

1 stop20h 36m

$694

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 9/23

3:25 pm-7:05 am

1 stop24h 40m

Singapore Changi

Wed 10/8

8:00 am-10:56 pm

2 stops29h 56m

$734

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 8/26

5:36 pm-7:10 pm

1 stop34h 34m

Singapore Changi

Wed 9/10

9:15 am-1:34 pm

1 stop19h 19m

$893

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 8/26

7:21 am-12:50 am

2 stops26h 29m

Singapore Changi

Wed 9/10

6:00 pm-9:47 am

2 stops30h 47m

$1,000

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 9/3

10:40 am-12:20 am

2 stops22h 40m

Singapore Changi

Wed 9/10

8:05 am-1:44 pm

2 stops20h 39m

$1,018

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 8/25

7:45 am-6:25 pm

1 stop19h 40m

Singapore Changi

Tue 9/9

8:45 am-12:43 pm

1 stop18h 58m

$1,024

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 8/28

9:10 am-5:00 am

2 stops28h 50m

Singapore Changi

Wed 9/10

7:30 am-5:06 pm

2 stops24h 36m

$1,038

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 11/1

6:00 am-12:10 am

2 stops27h 10m

Singapore Changi

Sat 11/15

1:30 am-1:19 pm

2 stops27h 49m

$1,102

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 9/23

7:25 pm-6:10 pm

1 stop31h 45m

Singapore Changi

Tue 10/7

1:10 am-5:35 pm

1 stop31h 25m

$1,946

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 10/15

1:15 pm-3:30 pm

1 stop35h 15m

Singapore Changi

Tue 10/28

1:40 am-12:25 pm

1 stop25h 45m

$2,006

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/11

Showing 1-10 of 15 results
1
2

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

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 $1,011). 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 SG?

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 May 13, 2025.

When flying from Portland to Singapore, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Singapore by month

Plan your trip to Singapore by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Singapore ranges from 5.9 - 10.6 inches per month. December is typically the wettest month, when rainfall can reach 10.6 in. July is typically the driest time to visit Singapore when rainfall is around 5.9 in.

Temperature in Singapore by month

Plan your trip to Singapore by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Singapore, use this chart to help with planning. For those seeking warmer temperatures, March is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 78.8 F).

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 May 13, 2025.
Read reviews from past customers who have flown Korean Air, Japan Airlines and Singapore Airlines from Portland to Singapore. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,072 reviews

Boarding

8.5

Comfort

8.3

Entertainment

8.2

Crew

8.7

Food

8.1

Overall

8.4

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
1,072 reviews
Korean Air
8.4
Very good
1,072 reviews

Boarding

8.5

Comfort

8.3

Entertainment

8.2

Crew

8.7

Food

8.1

Overall

8.4

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
1,472 reviews
Korean Air
8.4
Very good
1,072 reviews

Boarding

8.5

Comfort

8.3

Entertainment

8.2

Crew

8.7

Food

8.1

Overall

8.4

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
1,294 reviews
Korean Air
8.4
Very good
1,072 reviews

Boarding

8.5

Comfort

8.3

Entertainment

8.2

Crew

8.7

Food

8.1

Overall

8.4

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
7,950 reviews
Korean Air
8.4
Very good
1,072 reviews

Boarding

8.5

Comfort

8.3

Entertainment

8.2

Crew

8.7

Food

8.1

Overall

8.4

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.
KLM
7.8
Good
1,342 reviews
Korean Air
8.4
Very good
1,072 reviews

Boarding

8.5

Comfort

8.3

Entertainment

8.2

Crew

8.7

Food

8.1

Overall

8.4

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 airport do you fly from for flights from Portland to Singapore?

    Located just 6.0 mi from the city center, Portland (PDX) is the airport most travelers will use when flying to Singapore from Portland.

  • 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 Air Canada ($458), United Airlines ($564), and Delta ($669).

  • 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 $1,011). 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

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Alternative routes for Portland to Singapore

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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 May 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$714Average$861FlexibilityNo cancel feeOn-time67%
DeltaCheapest$800Average$921FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$800Average$1,210FlexibilityNo cancel feeOn-time69%
Korean AirCheapest$808Average$956FlexibilityNo cancel feeOn-time81%
Singapore AirlinesCheapest$986Average$1,248FlexibilityNo cancel feeOn-time81%

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