Which layover airport offers the lowest fares from Portland to Singapore?

Flights via Vancouver (YVR) offer the lowest average round-trip price of $790.

What is the cheapest airline that flies from Portland to Singapore Changi?

Singapore Airlines and Air Canada are the most popular carriers operating from Portland to Singapore Changi

Which layover airport has the shortest connection time from Portland to Singapore?

San Francisco (SFO) has the shortest average layover time for this route: 2h 51m.

Which airport is the most popular layover for flights between Portland and Singapore?

Vancouver (YVR) was the most common stop: 56% of momondo users choosing 1-stop flights on this route connected there.

What airlines fly to Singapore?

Air Canada, United Airlines and Singapore Airlines are the top three most popular airlines that fly to Singapore from Portland according to our data. Air Canada is the first choice among our users, with 45% of people opting to fly with this airline when traveling to Singapore. Keep in mind that there are 5 different airlines that fly to Singapore on a routine basis, so you have a few additional options to choose from.

Which layover airport has the shortest travel time from Portland to Singapore?

Flights connecting via San Francisco (SFO) have the shortest average one-way travel time: 20h 24m.

When did momondo last update prices for flights from Portland Airport to Singapore Changi Airport?

Prices for flights from Portland Airport to Singapore Changi Airport were last updated today.

How many operators does momondo search for flights from Portland Airport to Singapore Changi Airport?

As of December 2025, there are 5 operators available to choose from for flights from Portland Airport to Singapore Changi Airport.

How old do you have to be to fly from Portland Airport to Singapore Changi Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Portland Airport to Singapore Changi Airport.

What documentation or ID do you need to fly to Singapore Changi Airport?

The travel and health documents required for your trip to Singapore Changi Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Singapore Changi Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$440 Cheap Flights from Portland to Singapore in 2025/26

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Portland to Singapore

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

9:48 pm - 7:05 pm

PDX

SIN

29h 17m1 stop

9:15 am - 1:37 pm

SIN

PDX

19h 22m1 stop

$796Singapore Airlines

Tue, Mar 3 - Wed, Mar 11

7:00 pm - 7:00 am

PDX

SIN

21h 00m1 stop

10:50 pm - 2:40 pm

SIN

PDX

30h 50m2 stops

$802Air Canada

Thu, Mar 19 - Mon, Apr 20

7:00 pm - 7:00 am

PDX

SIN

20h 00m1 stop

8:50 am - 6:30 pm

SIN

PDX

24h 40m1 stop

$832Air Canada

Tue, Mar 3 - Thu, Mar 12

3:15 pm - 11:15 am

PDX

SIN

28h 00m2 stops

8:50 am - 2:40 pm

SIN

PDX

20h 50m1 stop

$834Air Canada

Mon, Mar 2 - Thu, Mar 12

3:50 pm - 7:00 am

PDX

SIN

23h 10m2 stops

8:50 am - 6:30 pm

SIN

PDX

24h 40m1 stop

$836Air Canada

Tue, Mar 3 - Thu, Mar 12

7:00 pm - 9:55 pm

PDX

SIN

58h 55m2 stops

8:50 am - 2:40 pm

SIN

PDX

20h 50m1 stop

$839Air Canada

Sun, Mar 1 - Thu, Mar 12

7:00 pm - 2:50 pm

PDX

SIN

27h 50m2 stops

6:35 am - 6:30 pm

SIN

PDX

26h 55m2 stops

$840Air Canada

Mon, Mar 2 - Tue, Mar 10

7:00 pm - 11:15 am

PDX

SIN

24h 15m2 stops

8:50 am - 11:04 pm

SIN

PDX

29h 14m2 stops

$844Air Canada

Mon, Mar 2 - Thu, Mar 12

3:15 pm - 9:55 pm

PDX

SIN

62h 40m2 stops

6:35 am - 6:30 pm

SIN

PDX

26h 55m2 stops

$845Air Canada

Sun, Mar 1 - Tue, Mar 10

9:50 am - 2:50 pm

PDX

SIN

37h 00m2 stops

6:35 am - 6:30 pm

SIN

PDX

26h 55m2 stops

$846Air Canada

Wed, Mar 4 - Tue, Mar 10

Cathay Pacific flights from Portland to Singapore

Our best Cathay Pacific deals on Portland to Singapore flight tickets

Cathay Pacific

Feb 16

PDX7:05 amPortland

25h 20m

2 stops

SIN12:25 amSingapore Changi

Mar 1

SIN8:15 pmSingapore Changi

33h 10m

2 stops

PDX1:25 pmPortland

$948

Find similar

Cathay Pacific

Dec 14

PDX5:50 pmPortland

43h 50m

2 stops

SIN5:40 amSingapore Changi

Jan 3

SIN2:05 pmSingapore Changi

23h 06m

2 stops

PDX9:11 pmPortland

$1,945

Find similar

Cathay Pacific

Dec 14

PDX10:05 amPortland

41h 10m

2 stops

SIN7:15 pmSingapore Changi

Jan 3

SIN2:05 pmSingapore Changi

39h 42m

2 stops

PDX1:47 pmPortland

$2,887

Find similar

Air Canada flights from Portland to Singapore

Our best Air Canada deals on Portland to Singapore flight tickets

Air Canada

May 12

PDX10:10 amPortland

28h 05m

1 stop

SIN5:15 amSingapore Changi

May 19

SIN7:00 amSingapore Changi

26h 46m

1 stop

PDX6:46 pmPortland

$795

Find similar

Air Canada

May 12

PDX3:25 pmPortland

22h 50m

1 stop

SIN5:15 amSingapore Changi

May 19

SIN8:50 pmSingapore Changi

32h 55m

2 stops

PDX2:45 pmPortland

$797

Find similar

Air Canada

Mar 19

PDX7:00 pmPortland

21h 00m

1 stop

SIN7:00 amSingapore Changi

Apr 20

SIN10:50 pmSingapore Changi

30h 50m

2 stops

PDX2:40 pmPortland

$802

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 3/3

9:48 pm-7:05 pm

1 stop29h 17m

Singapore Changi

Wed 3/11

9:15 am-1:37 pm

1 stop19h 22m

$796

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 3/19

7:00 pm-7:00 am

1 stop21h 00m

Singapore Changi

Mon 4/20

10:50 pm-2:40 pm

2 stops30h 50m

$802

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 3/3

7:00 pm-7:00 am

1 stop20h 00m

Singapore Changi

Thu 3/12

8:50 am-6:30 pm

1 stop24h 40m

$832

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 3/2

3:15 pm-11:15 am

2 stops28h 00m

Singapore Changi

Thu 3/12

8:50 am-2:40 pm

1 stop20h 50m

$834

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 3/3

3:50 pm-7:00 am

2 stops23h 10m

Singapore Changi

Thu 3/12

8:50 am-6:30 pm

1 stop24h 40m

$836

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 3/1

7:00 pm-9:55 pm

2 stops58h 55m

Singapore Changi

Thu 3/12

8:50 am-2:40 pm

1 stop20h 50m

$839

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 3/2

7:00 pm-2:50 pm

2 stops27h 50m

Singapore Changi

Tue 3/10

6:35 am-6:30 pm

2 stops26h 55m

$840

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 3/2

7:00 pm-11:15 am

2 stops24h 15m

Singapore Changi

Thu 3/12

8:50 am-11:04 pm

2 stops29h 14m

$844

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 3/1

3:15 pm-9:55 pm

2 stops62h 40m

Singapore Changi

Tue 3/10

6:35 am-6:30 pm

2 stops26h 55m

$845

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 3/4

9:50 am-2:50 pm

2 stops37h 00m

Singapore Changi

Tue 3/10

6:35 am-6:30 pm

2 stops26h 55m

$846

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Portland to Singapore

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Layovers

What is the cheapest month to fly to Singapore?

The month of September is, on average, the cheapest month to fly to Singapore from Portland, with most prices found around $749. If you aren’t able to travel to Singapore during the month of September, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $880.

What is the cheapest day to depart on your flight to Singapore?

The cheapest day to depart from Portland to Singapore is on a Tuesday when prices can be found for as low as $1,256. The most expensive day to fly to Singapore is Saturday, with ticket prices averaging around $1,673.

What is the cheapest time of day to depart on your flight to Singapore?

At noon is the cheapest time of day to fly from Portland to Singapore when you can find flight prices for as low as $1,121. Flying to Singapore at noon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,334 on average. Flights to Singapore from Portland in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight to Singapore?

You are more likely to see cheaper flights to Singapore from Portland when booking weeks ahead of your departure date. In general, you can expect to find flights to Singapore for around $997 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Singapore from Portland for as low as $730 on momondo.

Can stopping save me money on Portland to Singapore flights?

You could potentially save up to 10% on your flight if you consider stops on a Portland to Singapore flight.

How have Portland to Singapore flight prices changed over time?

As of December 2025, prices for Portland to Singapore flights are approximately 11% cheaper when compared to flights at the same time last year.

When to book flights from Portland to Singapore

Are you open to changing your travel dates? Check out the ideal times to fly from Portland to Singapore according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Portland to Singapore (PDX to SIN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland to Singapore

Fastest flight time	21h 00m
Direct flights	None

The fastest flight from Portland to Singapore takes 21h 00m

There are no direct flights from Portland to Singapore. There are no popular flight routes from Portland to Singapore.

Search flight deals

How far is Portland to Singapore Changi by plane?
The straight-line distance from Portland to Singapore Changi is 8130.5 mi. In terms of flight time, this usually takes a little over 20h 00m.
When did momondo last update prices for flights from Portland Airport to Singapore Changi Airport?
Prices for flights from Portland Airport to Singapore Changi Airport were last updated today.
How many operators does momondo search for flights from Portland Airport to Singapore Changi Airport?
As of December 2025, there are 5 operators available to choose from for flights from Portland Airport to Singapore Changi Airport.
How old do you have to be to fly from Portland Airport to Singapore Changi Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Portland Airport to Singapore Changi Airport.
What documentation or ID do you need to fly to Singapore Changi Airport?
The travel and health documents required for your trip to Singapore Changi Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Singapore Changi Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from Portland to Singapore?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Portland to Singapore is Air Canada (43% of total bookings). The next most popular airlines are United Airlines (31%), Singapore Airlines (14%), and Korean Air (7%).

Best airlines flying from Portland to Singapore

Compare and see reviews for airlines that fly from Portland to Singapore with momondo

Airline	Rating	Free Cancellation	Price
Air Canada	PriceFrom $694	Free Cancellation	Rating 7.1 10,500 reviews	Search Air Canada flights
Korean Air	PriceFrom $792	Free Cancellation	Rating 8.4 1,179 reviews	Search Korean Air flights
Delta	PriceFrom $800	Free Cancellation	Rating 7.9 8,011 reviews	Search Delta flights
United Airlines	PriceFrom $868	Free Cancellation	Rating 7.4 9,066 reviews	Search United Airlines flights
Singapore Airlines	PriceFrom $873	Free Cancellation	Rating 8.1 1,411 reviews	Search Singapore Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Portland to Singapore?

Finding the right flight to Singapore from Portland is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Singapore quick and easy, saving you time and money.

Can I find flights from Portland to Singapore with flexible booking policies on momondo?

Flights from Portland to Singapore with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Portland to Singapore?

Once you have performed a search for Portland to Singapore flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Portland to Singapore right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Singapore, momondo offers a useful price alert feature which will track prices for flights to Singapore from Portland and alert you when they change.

An easier way to manage your Singapore trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

Sat 1/3

Sat 1/10

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Singapore

Fly your favorite airline to Singapore

Cheap flights from Portland to Singapore from $440

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland to Singapore departing on 2/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Portland to Singapore

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cathay Pacific flights from Portland to Singapore

Our best Cathay Pacific deals on Portland to Singapore flight tickets

Air Canada flights from Portland to Singapore

Our best Air Canada deals on Portland to Singapore flight tickets

momondo Fare Finder

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

See travel insights to Singapore from

How to get the cheapest flight ticket from Portland to Singapore

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Singapore?

What is the cheapest day to depart on your flight to Singapore?

The cheapest day to depart from Portland to Singapore is on a Tuesday when prices can be found for as low as $1,256. The most expensive day to fly to Singapore is Saturday, with ticket prices averaging around $1,673.

What is the cheapest time of day to depart on your flight to Singapore?

How far in advance should I book a flight to Singapore?

Can stopping save me money on Portland to Singapore flights?

You could potentially save up to 10% on your flight if you consider stops on a Portland to Singapore flight.

How have Portland to Singapore flight prices changed over time?

As of December 2025, prices for Portland to Singapore flights are approximately 11% cheaper when compared to flights at the same time last year.

What is the cheapest airline that flies from Portland to Singapore Changi?

Singapore Airlines and Air Canada are the most popular carriers operating from Portland to Singapore Changi

What airlines fly to Singapore?

Which airport is the most popular layover for flights between Portland and Singapore?

Vancouver (YVR) was the most common stop: 56% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Portland to Singapore?

Flights via Vancouver (YVR) offer the lowest average round-trip price of $790.

Which layover airport has the shortest travel time from Portland to Singapore?

Flights connecting via San Francisco (SFO) have the shortest average one-way travel time: 20h 24m.

Which layover airport has the shortest connection time from Portland to Singapore?

San Francisco (SFO) has the shortest average layover time for this route: 2h 51m.

When to book flights from Portland to Singapore

Cheap Portland to Singapore (PDX to SIN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland to Singapore

Fastest flight time

Direct flights

How far is Portland to Singapore Changi by plane?

When did momondo last update prices for flights from Portland Airport to Singapore Changi Airport?

How many operators does momondo search for flights from Portland Airport to Singapore Changi Airport?

How old do you have to be to fly from Portland Airport to Singapore Changi Airport?

What documentation or ID do you need to fly to Singapore Changi Airport?

What is the most popular airline from Portland to Singapore?

Best airlines flying from Portland to Singapore

Compare and see reviews for airlines that fly from Portland to Singapore with momondo

Why use momondo?

Why should I use momondo to find a flight deal from Portland to Singapore?

Can I find flights from Portland to Singapore with flexible booking policies on momondo?

How can momondo help me find flights from Portland to Singapore?

I’m not ready to book a flight from Portland to Singapore right now. Can momondo alert me if prices change?

An easier way to manage your Singapore trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Singapore

Fly your favorite airline to Singapore

Airlines are sorted and displayed according to clicks in the past 7 days on momondo