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Cheap flights from Portland to Singapore from S$ 548

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 25-4. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SIN
2 Apr — 9 Apr1
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 28 March 2025.

Round-trip from

S$ 946

One-way from

S$ 548

Popular in

December

Cheapest in

February

Average price

S$ 1,400
Air Canada
  • Air Canada
  • 4-9-25-9
  • 2 total stops
  • 45h 01m total
  • Portland to Singapore
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United Airlines
  • United Airlines
  • 25-4
  • 1 total stop
  • 24h 00m total
  • Portland to Singapore
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Highest demand for flights based on searches. 5% potential increase in price (S$ 116 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (S$ 58 potential savings vs. average return price).
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Average for round-trip flights in March 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 28 March 2025.

Thu 4-919:40PDX - SIN
1 stop20h 25mAir Canada
Thu 25-909:10SIN - PDX
1 stop24h 36mAir Canada
Deal found 28-3S$ 946
Tue 16-910:10PDX - SIN
1 stop29h 55mMultiple Airlines
Mon 29-908:00SIN - PDX
2 stops29h 56mMultiple Airlines
Deal found 27-3S$ 999
Wed 15-1007:00PDX - SIN
1 stop21h 10mSingapore Airlines
Wed 29-1009:15SIN - PDX
1 stop19h 04mSingapore Airlines
Deal found 28-3S$ 1,118
Thu 4-907:00PDX - SIN
2 stops26h 20mJapan Airlines
Wed 24-901:55SIN - PDX
2 stops34h 35mJapan Airlines
Deal found 28-3S$ 1,169
Mon 7-406:00PDX - SIN
1 stop21h 25mUnited Airlines
Tue 22-409:00SIN - PDX
1 stop18h 33mUnited Airlines
Deal found 27-3S$ 1,180
Thu 8-520:00PDX - SIN
2 stops42h 00mDelta
Thu 15-507:30SIN - PDX
2 stops31h 40mDelta
Deal found 28-3S$ 1,201
Mon 7-412:57PDX - SIN
2 stops49h 03mKorean Air
Mon 21-401:10SIN - PDX
2 stops54h 33mKorean Air
Deal found 27-3S$ 1,248
Sun 6-713:25PDX - SIN
2 stops28h 35mQatar Airways
Wed 30-718:45SIN - PDX
2 stops40h 23mQatar Airways
Deal found 27-3S$ 1,931

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 28 March 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

19:40-07:05

1 stop20h 25m

Singapore Changi

Thu 25-9

09:10-18:46

1 stop24h 36m

S$ 946

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 16-9

10:10-07:05

1 stop29h 55m

Singapore Changi

Mon 29-9

08:00-22:56

2 stops29h 56m

S$ 999

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 4-9

07:00-00:20

2 stops26h 20m

Singapore Changi

Wed 24-9

01:55-21:30

2 stops34h 35m

S$ 1,169

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 7-4

06:00-18:25

1 stop21h 25m

Singapore Changi

Tue 22-4

09:00-12:33

1 stop18h 33m

S$ 1,180

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 8-5

20:00-05:00

2 stops42h 00m

Singapore Changi

Thu 15-5

07:30-00:10

2 stops31h 40m

S$ 1,201

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 17-9

07:00-19:10

1 stop21h 10m

Singapore Changi

Tue 30-9

09:15-09:47

1 stop39h 32m

S$ 1,247

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 7-4

12:57-05:00

2 stops49h 03m

Singapore Changi

Mon 21-4

01:10-16:43

2 stops54h 33m

S$ 1,248

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 6-7

13:25-09:00

2 stops28h 35m

Singapore Changi

Wed 30-7

18:45-20:08

2 stops40h 23m

S$ 1,931

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 17-9

19:25-18:10

1 stop31h 45m

Singapore Changi

Mon 29-9

01:10-17:35

1 stop31h 25m

S$ 2,616

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 8-5

17:40-18:00

3 stops33h 20m

Singapore Changi

Thu 15-5

13:55-23:59

2 stops49h 04m

S$ 2,629

Flights are sorted by cheapest return flights first.

Deals found on 27-3

Showing 1-10 of 16 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 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 21 March 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 28 March 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
1,050 reviews
Check prices

Comfort

8.3

Crew

8.7

Food

8.1

Entertainment

8.2

Boarding

8.5

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
1,050 reviews
Korean Air
8.4
Very Good
1,050 reviews
Check prices

Comfort

8.3

Crew

8.7

Food

8.1

Entertainment

8.2

Boarding

8.5

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
1,440 reviews
Korean Air
8.4
Very Good
1,050 reviews
Check prices

Comfort

8.3

Crew

8.7

Food

8.1

Entertainment

8.2

Boarding

8.5

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
1,285 reviews
Korean Air
8.4
Very Good
1,050 reviews
Check prices

Comfort

8.3

Crew

8.7

Food

8.1

Entertainment

8.2

Boarding

8.5

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.
Fiji Airways
8.0
Very Good
182 reviews
Korean Air
8.4
Very Good
1,050 reviews
Check prices

Comfort

8.3

Crew

8.7

Food

8.1

Entertainment

8.2

Boarding

8.5

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
7,896 reviews
Korean Air
8.4
Very Good
1,050 reviews
Check prices

Comfort

8.3

Crew

8.7

Food

8.1

Entertainment

8.2

Boarding

8.5

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 are the cheapest airlines flying from Portland to Singapore round-trip?

    According to our current data, Air Canada (S$ 946), Japan Airlines (S$ 1,169), and United Airlines (S$ 1,180) offers the cheapest pricing from Portland to Singapore. Air Canada is priced at 39% 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$ 548 on United Airlines. Other airlines that offer cheap prices include Japan Airlines from S$ 552 and Delta from S$ 613 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

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

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