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Cheap flights from Portland to Singapore from S$ 535

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 9-8. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SIN
5 May — 12 May1
1 adult

Cheapflights Tip: The best prices from Portland to Singapore Changi are usually found in February or September, booked 73 days in advance, depart on a Monday or Wednesday and return on a Monday

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 30 April 2025.

Round-trip from

S$ 925

One-way from

S$ 535

Popular in

December

Cheapest in

February

Average price

S$ 1,361
Air Canada
  • Air Canada
  • 4-9-25-9
  • 2 total stops
  • 54h 41m total
  • Portland to Singapore
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United Airlines
  • United Airlines
  • 9-8
  • 1 total stop
  • 29h 16m total
  • Portland to Singapore
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (S$ 191 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (S$ 64 potential savings vs. average return price).
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Average for round-trip flights in April 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 30 April 2025.

Thu 4-910:00PDX - SIN
1 stop30h 05mAir Canada
Thu 25-909:10SIN - PDX
1 stop24h 36mAir Canada
Deal found 29-4S$ 925
Tue 23-915:25PDX - SIN
1 stop24h 40mMultiple Airlines
Wed 8-1008:00SIN - PDX
2 stops25h 46mMultiple Airlines
Deal found 29-4S$ 977
Wed 15-1007:00PDX - SIN
1 stop21h 10mSingapore Airlines
Wed 29-1009:15SIN - PDX
1 stop19h 04mSingapore Airlines
Deal found 29-4S$ 1,044
Sat 1-1106:00PDX - SIN
2 stops27h 10mKorean Air
Sat 15-1101:30SIN - PDX
2 stops31h 36mKorean Air
Deal found 29-4S$ 1,057
Tue 16-905:30PDX - SIN
1 stop21h 55mUnited Airlines
Wed 1-1008:45SIN - PDX
1 stop28h 52mUnited Airlines
Deal found 30-4S$ 1,154
Thu 4-905:30PDX - SIN
2 stops32h 30mDelta
Wed 24-901:10SIN - PDX
2 stops33h 03mDelta
Deal found 29-4S$ 1,168
Thu 30-1007:00PDX - SIN
2 stops43h 25mJapan Airlines
Tue 18-1122:25SIN - PDX
2 stops39h 36mJapan Airlines
Deal found 29-4S$ 2,130
Sat 20-1213:45PDX - SIN
2 stops31h 20mChina Airlines
Wed 7-114:15SIN - PDX
2 stops35h 32mChina Airlines
Deal found 29-4S$ 2,381
Wed 15-1013:15PDX - SIN
1 stop35h 15mKLM
Tue 28-1001:40SIN - PDX
1 stop25h 45mKLM
Deal found 29-4S$ 2,624
Thu 30-1017:30PDX - SIN
2 stops31h 15mCathay Pacific
Mon 17-1101:25SIN - PDX
2 stops31h 03mCathay Pacific
Deal found 29-4S$ 2,865
Thu 29-517:33PDX - SIN
3 stops33h 27mFiji Airways
Thu 5-613:55SIN - PDX
3 stops46h 38mFiji Airways
Deal found 29-4S$ 2,959
Wed 30-411:20PDX - SIN
2 stops33h 40mEVA Air
Wed 7-515:10SIN - PDX
2 stops33h 38mEVA Air
Deal found 29-4S$ 6,697

Cheapflights Fare Finder

Customise 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 200,618 searches. Data last updated 30 April 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 4-9

10:00-07:05

1 stop30h 05m

Singapore Changi

Thu 25-9

09:10-18:46

1 stop24h 36m

S$ 925

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 23-9

15:25-07:05

1 stop24h 40m

Singapore Changi

Wed 8-10

08:00-18:46

2 stops25h 46m

S$ 977

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 15-10

07:00-19:10

1 stop21h 10m

Singapore Changi

Wed 29-10

09:15-13:19

1 stop19h 04m

S$ 1,044

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 16-9

05:30-18:25

1 stop21h 55m

Singapore Changi

Wed 1-10

08:45-22:37

1 stop28h 52m

S$ 1,154

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 4-9

05:30-05:00

2 stops32h 30m

Singapore Changi

Wed 24-9

01:10-19:13

2 stops33h 03m

S$ 1,168

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 13-5

09:10-23:40

2 stops23h 30m

Singapore Changi

Sat 19-7

07:30-14:53

2 stops22h 23m

S$ 1,225

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 15-10

13:15-15:30

1 stop35h 15m

Singapore Changi

Tue 28-10

01:40-12:25

1 stop25h 45m

S$ 2,624

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 29-5

17:33-18:00

3 stops33h 27m

Singapore Changi

Thu 5-6

13:55-21:33

3 stops46h 38m

S$ 2,959

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 3-6

07:00-00:50

2 stops26h 50m

Singapore Changi

Wed 11-6

01:50-16:50

2 stops30h 00m

S$ 3,328

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 1-10

07:00-00:20

2 stops26h 20m

Singapore Changi

Mon 20-10

08:05-13:46

2 stops20h 41m

S$ 5,441

Flights are sorted by cheapest return flights first.

Deals found on 29-4

Showing 1-10 of 19 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 return 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 return flight from Portland to Singapore. Price data was last updated on 25 April 2025.

To ensure you get the cheapest price possible for a flight from Portland to Singapore, you should look to book at least 72 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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 150.0 - 269.0 inches per month. December is typically the wettest month, when rainfall can reach 269.0 mm. July is typically the driest time to visit Singapore when rainfall is around 150.0 mm.

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 28.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 26.0 C).

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 30 April 2025.
Get a feel of what it's like to fly with Korean Air, Japan Airlines and ANA 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
1,066 reviews
Check prices

Boarding

8.5

Entertainment

8.2

Overall

8.4

Comfort

8.3

Food

8.1

Crew

8.7

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
1,066 reviews
Korean Air
8.4
Very Good
1,066 reviews
Check prices

Boarding

8.5

Entertainment

8.2

Overall

8.4

Comfort

8.3

Food

8.1

Crew

8.7

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
1,459 reviews
Korean Air
8.4
Very Good
1,066 reviews
Check prices

Boarding

8.5

Entertainment

8.2

Overall

8.4

Comfort

8.3

Food

8.1

Crew

8.7

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.
ANA
8.3
Very Good
852 reviews
Korean Air
8.4
Very Good
1,066 reviews
Check prices

Boarding

8.5

Entertainment

8.2

Overall

8.4

Comfort

8.3

Food

8.1

Crew

8.7

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.
Fiji Airways
8.1
Very Good
190 reviews
Korean Air
8.4
Very Good
1,066 reviews
Check prices

Boarding

8.5

Entertainment

8.2

Overall

8.4

Comfort

8.3

Food

8.1

Crew

8.7

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
1,292 reviews
Korean Air
8.4
Very Good
1,066 reviews
Check prices

Boarding

8.5

Entertainment

8.2

Overall

8.4

Comfort

8.3

Food

8.1

Crew

8.7

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?

    According to our current data, Air Canada (S$ 925), Singapore Airlines (S$ 1,044), and United Airlines (S$ 1,154) offers the cheapest pricing from Portland to Singapore. Air Canada is priced at 36% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Portland to Singapore one-way?

    One-way options have recently been found by users for as low as S$ 535 on United Airlines. Other airlines that offer cheap prices include Korean Air from S$ 598 and Air Canada from S$ 621 one-way.

  • 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 holiday 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.

See more FAQs

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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

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