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

According to our current data, Air Canada (S$ 935), Korean Air (S$ 1,037), and Delta (S$ 1,073) offers the cheapest pricing from Portland to Singapore. Air Canada is priced at 30% lower than the current average price of a flight leaving 3 months from now. Find deals

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$ 609 on Air Canada. Other airlines that offer cheap prices include Singapore Airlines from S$ 827 and United Airlines from S$ 895 one-way. Find deals

What is the cheapest day to fly from Portland to Singapore?

Travellers seeking maximum savings on their Portland to Singapore flight should consider departing on Saturday mornings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time. Find deals

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.

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).

What is the cheapest day to fly return from Portland to Singapore?

Friday flights are generally found to be more expensive for flights from Portland to Singapore. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Singapore.

What is the cheapest month to fly from Portland to Singapore?

The best pricing can be found in the month of September. Prices to Singapore from Portland average S$ 1,348. You can even find prices in September for less than S$ 1,348, as users have found deals to Singapore from as low as S$ 884. The month of December appears to be one of the more expensive times to travel to Singapore from Portland. Flying in the targeted month can save you up to 37%.

What is the cheapest time of day to fly from PDX to SIN?

Unlike in the morning, when flights are generally more expensive, you can save up to 46% on flights from Portland to Singapore by exploring options for tickets at midday.

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.

S$ 568+ Flights from Portland to Singapore

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 Monday or Wednesday and return on a Monday

Cheap flight deals from Portland to Singapore

Round-trip from	S$ 935
One-way from	S$ 568
Popular in	December
Cheapest in	September
Average price	S$ 1,390

Air Canada
4-9-25-9
2 total stops
41h 01m total
Portland to Singapore

Search Deals

26-8
2 total stops
37h 00m total
Portland to Singapore

Search Deals

Highest demand for flights based on searches. 10% potential increase in price (S$ 209 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (S$ 60 potential savings vs. average return price).

Search Deals

Average for round-trip flights in June 2025

Search Deals

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 27 June 2025.

Thu 4-919:40PDX - SIN

1 stop20h 25mAir Canada

Thu 25-909:10SIN - PDX

1 stop20h 36mAir Canada

Deal found 27-6S$ 935

Wed 23-706:15PDX - SIN

2 stops26h 25mKorean Air

Tue 29-701:10SIN - PDX

2 stops30h 55mKorean Air

Deal found 26-6S$ 1,037

Wed 16-705:17PDX - SIN

2 stops32h 43mDelta

Wed 6-807:30SIN - PDX

2 stops31h 58mDelta

Deal found 26-6S$ 1,073

Wed 19-1123:59PDX - SIN

2 stops39h 56mMultiple Airlines

Tue 3-309:30SIN - PDX

2 stops24h 54mMultiple Airlines

Deal found 25-6S$ 1,176

Wed 15-1007:00PDX - SIN

1 stop21h 10mSingapore Airlines

Wed 29-1009:15SIN - PDX

1 stop19h 08mSingapore Airlines

Deal found 26-6S$ 1,211

Wed 17-914:30PDX - SIN

2 stops31h 05mChina Airlines

Mon 29-902:00SIN - PDX

2 stops45h 58mChina Airlines

Deal found 25-6S$ 1,303

Wed 30-705:25PDX - SIN

1 stop22h 00mUnited Airlines

Mon 25-808:45SIN - PDX

1 stop20h 57mUnited Airlines

Deal found 26-6S$ 1,306

Tue 30-908:30PDX - SIN

2 stops24h 50mJapan Airlines

Mon 27-1002:20SIN - PDX

2 stops32h 29mJapan Airlines

Deal found 24-6S$ 1,355

Wed 1-1020:37PDX - SIN

2 stops25h 03mSTARLUX Airlines

Wed 29-1014:45SIN - PDX

2 stops20h 42mSTARLUX Airlines

Deal found 26-6S$ 1,362

Wed 1-1006:00PDX - SIN

2 stops32h 25mChina Eastern

Tue 28-1000:25SIN - PDX

2 stops30h 47mChina Eastern

Deal found 26-6S$ 1,373

Best flights from Portland to Singapore
Discover carefully curated flight deals from Portland to Singapore that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 27 June 2025.

Thu 4-919:40PDX - SIN

1 stop20h 25mAir Canada

Thu 25-909:10SIN - PDX

1 stop20h 36mAir Canada

Deal found 27-6S$ 935

Wed 23-706:15PDX - SIN

2 stops26h 25mKorean Air

Tue 29-701:10SIN - PDX

2 stops30h 55mKorean Air

Deal found 26-6S$ 1,037

Wed 16-705:17PDX - SIN

2 stops32h 43mDelta

Wed 6-807:30SIN - PDX

2 stops31h 58mDelta

Deal found 26-6S$ 1,073

Wed 19-1123:59PDX - SIN

2 stops39h 56mMultiple Airlines

Tue 3-309:30SIN - PDX

2 stops24h 54mMultiple Airlines

Deal found 25-6S$ 1,176

Wed 15-1007:00PDX - SIN

1 stop21h 10mSingapore Airlines

Wed 29-1009:15SIN - PDX

1 stop19h 08mSingapore Airlines

Deal found 26-6S$ 1,211

Mon 29-908:30PDX - SIN

2 stops24h 50mJapan Airlines

Wed 29-1008:15SIN - PDX

2 stops23h 35mJapan Airlines

Deal found 26-6S$ 1,291

Wed 17-914:30PDX - SIN

2 stops31h 05mChina Airlines

Mon 29-902:00SIN - PDX

2 stops45h 58mChina Airlines

Deal found 25-6S$ 1,303

Wed 30-705:25PDX - SIN

1 stop22h 00mUnited Airlines

Wed 27-820:40SIN - PDX

1 stop19h 05mUnited Airlines

Deal found 26-6S$ 1,306

Wed 1-1020:37PDX - SIN

2 stops25h 03mSTARLUX Airlines

Wed 29-1014:45SIN - PDX

2 stops20h 42mSTARLUX Airlines

Deal found 26-6S$ 1,362

Wed 1-1006:00PDX - SIN

2 stops32h 25mChina Eastern

Tue 28-1000:25SIN - PDX

2 stops30h 47mChina Eastern

Deal found 26-6S$ 1,373

Last-minute flights from Portland to Singapore
Discover last-minute flight deals from Portland to Singapore. Data last updated 27 June 2025 and is based on user searches.

Wed 2-717:09PDX - SIN

2 stops27h 51mEVA Air

Sun 13-713:10SIN - PDX

2 stops22h 40mEVA Air

Deal found 25-6S$ 6,802

Wed 2-713:37PDX - SIN

1 stop25h 38mUnited Airlines

Sun 13-720:40SIN - PDX

1 stop18h 55mUnited Airlines

Deal found 25-6S$ 9,227

Thu 3-717:09PDX - SIN

2 stops27h 51mMultiple Airlines

Mon 14-715:10SIN - PDX

2 stops38h 31mMultiple Airlines

Deal found 26-6S$ 6,482

Thu 3-707:55PDX - SIN

2 stops25h 25mJapan Airlines

Sun 13-701:55SIN - PDX

2 stops35h 19mJapan Airlines

Deal found 26-6S$ 6,797

Sun 6-719:40PDX - SIN

1 stop20h 25mAir Canada

Tue 22-709:10SIN - PDX

1 stop28h 51mAir Canada

Deal found 25-6S$ 1,065

Sun 6-709:10PDX - SIN

2 stops28h 50mDelta

Mon 21-701:10SIN - PDX

2 stops30h 55mDelta

Deal found 25-6S$ 1,407

Sun 6-706:15PDX - SIN

2 stops31h 45mKorean Air

Tue 22-707:30SIN - PDX

2 stops24h 35mKorean Air

Deal found 25-6S$ 1,415

Sun 6-709:40PDX - SIN

2 stops32h 20mQatar Airways

Mon 21-703:10SIN - PDX

2 stops42h 10mQatar Airways

Deal found 25-6S$ 1,801

Sat 12-706:10PDX - SIN

2 stops27h 10mJapan Airlines

Thu 31-701:55SIN - PDX

2 stops35h 19mJapan Airlines

Deal found 26-6S$ 2,555

Sun 13-710:05PDX - SIN

1 stop30h 00mAir Canada

Thu 24-709:10SIN - PDX

1 stop39h 20mAir Canada

Deal found 26-6S$ 1,000

Sun 13-711:57PDX - SIN

2 stops30h 03mQatar Airways

Fri 1-803:10SIN - PDX

2 stops28h 26mQatar Airways

Deal found 26-6S$ 1,800

Mon 14-717:40PDX - SIN

2 stops36h 50mMultiple Airlines

Thu 24-722:50SIN - PDX

2 stops37h 00mMultiple Airlines

Deal found 26-6S$ 1,350

One-way flights from Portland to Singapore
Search for one-way flight options from Portland to Singapore. Find affordable one-way fares based on user searches. Data last updated 27 June 2025.

Tue 26-817:30PDX - SIN

2 stops37h 00mMultiple Airlines

Deal found 26-6S$ 568

Thu 18-910:00PDX - SIN

1 stop30h 05mAir Canada

Deal found 26-6S$ 609

Sat 1-1106:00PDX - SIN

1 stop20h 45mSingapore Airlines

Deal found 25-6S$ 827

Sat 1-1119:38PDX - SIN

1 stop20h 22mUnited Airlines

Deal found 26-6S$ 895

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portland to Singapore that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 4-9

19:40-07:05

1 stop20h 25m

Singapore Changi

Thu 25-9

09:10-14:46

1 stop20h 36m

S$ 935

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 23-7

06:15-23:40

2 stops26h 25m

Singapore Changi

Tue 29-7

01:10-17:05

2 stops30h 55m

S$ 1,037

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 16-7

07:15-05:00

2 stops30h 45m

Singapore Changi

Thu 7-8

07:30-19:00

2 stops26h 30m

S$ 1,073

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 19-11

23:59-07:55

2 stops39h 56m

Singapore Changi

Tue 3-3

09:30-18:24

2 stops24h 54m

S$ 1,176

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 15-10

07:00-19:10

1 stop21h 10m

Singapore Changi

Wed 29-10

09:15-13:23

1 stop19h 08m

S$ 1,211

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 29-9

08:30-00:20

2 stops24h 50m

Singapore Changi

Wed 29-10

08:15-16:50

2 stops23h 35m

S$ 1,291

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 17-9

14:30-12:35

2 stops31h 05m

Singapore Changi

Mon 29-9

02:00-08:58

2 stops45h 58m

S$ 1,303

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 30-7

05:25-18:25

1 stop22h 00m

Singapore Changi

Wed 27-8

20:40-00:45

1 stop19h 05m

S$ 1,306

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 1-10

20:37-12:40

2 stops25h 03m

Singapore Changi

Wed 29-10

14:45-20:27

2 stops20h 42m

S$ 1,362

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 1-10

06:00-05:25

2 stops32h 25m

Singapore Changi

Tue 28-10

00:25-16:12

2 stops30h 47m

S$ 1,373

Flights are sorted by cheapest return flights first.

Deals found on 26-6

Showing 1-10 of 15 results

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?

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.

Reviews of airlines servicing Singapore

Check out reviews from past customers who have flown with STARLUX Airlines, Korean Air, andJapan Airlines from Portland to Singapore to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

STARLUX Airlines

9.1

Wonderful

Check prices

Reviews

1 / 7

10.0

Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.

STARLUX Airlines

9.1

Wonderful

STARLUX Airlines

9.1

Wonderful

Check prices

Reviews

1 / 7

10.0

Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.

Korean Air

8.4

Very Good

1,099 reviews

STARLUX Airlines

9.1

Wonderful

Check prices

Reviews

1 / 7

10.0

Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.

Japan Airlines

8.3

Very Good

1,504 reviews

STARLUX Airlines

9.1

Wonderful

Check prices

Reviews

1 / 7

10.0

Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.

China Airlines

8.3

Very Good

745 reviews

STARLUX Airlines

9.1

Wonderful

Check prices

Reviews

1 / 7

10.0

Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.

Singapore Airlines

8.1

Very Good

1,316 reviews

STARLUX Airlines

9.1

Wonderful

Check prices

Reviews

1 / 7

10.0

Excellent

ltulagan,Jun 2025

TPE - SEA

The whole trip was very pleasant from the crew, the food, the amenities during the flight.

Related info for your journey

What are the cheapest airlines flying from Portland to Singapore round-trip?
According to our current data, Air Canada (S$ 935), Korean Air (S$ 1,037), and Delta (S$ 1,073) offers the cheapest pricing from Portland to Singapore. Air Canada is priced at 30% 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$ 609 on Air Canada. Other airlines that offer cheap prices include Singapore Airlines from S$ 827 and United Airlines from S$ 895 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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Fly with Cheapflights

How does Cheapflights help users find flights from Portland to Singapore?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Singapore from Portland today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Portland to Singapore?

Cheapflights helps you find that perfect flight to Singapore from Portland by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Portland to Singapore with no change fees?

Yes, we can. To see specific flights from Portland to Singapore with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Portland to Singapore become cheaper?

Not ready to book yet? You can track prices for flights from Portland to Singapore on Cheapflights with our Price Alert feature and get notified when better prices are available.

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Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from Portland to Singapore from S$ 568

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 26-8. Fares are subject to change and may not be available on all flights or dates of travel.

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 Monday or Wednesday and return on a Monday

Cheap flight deals from Portland to Singapore

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Portland to Singapore

Cheapest flights from Portland to SingaporeExplore 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 27 June 2025.

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 27 June 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portland to Singapore that are best for you.

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.

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 20 June 2025.

Reviews of airlines servicing Singapore

Check out reviews from past customers who have flown with STARLUX Airlines, Korean Air, andJapan Airlines from Portland to Singapore to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

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?

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

Can I find deals for flights from Portland to Singapore that include hotel bookings?

How can I find direct flights from Portland to Singapore?

Can I find deals for business class flights from Portland to Singapore?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Portland to Singapore

See prices for flight routes from nearby airports that may be better suited for you.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Portland to Singapore?

Why should you use Cheapflights to find cheap flight tickets from Portland to Singapore?

Can Cheapflights find flights from Portland to Singapore with no change fees?

Can Cheapflights notify me if prices for flights from Portland to Singapore become cheaper?

100% Free

Book with Flexibility

Travel Smart

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 27 June 2025.