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Cheap flights from Portland to Singapore from $426

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 8/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Portland to Singapore

Cheap round-trip flights

Enter your travel dates to find the best prices.
Singapore Airlines Logo
7:00 am - 7:10 pm
PDX
-
SIN
21h 10m
1 stop
Singapore Airlines Logo
9:15 am - 4:50 pm
SIN
-
PDX
22h 35m
1 stop
$800Singapore Airlines
Tue, Sep 1 - Wed, Sep 30
Singapore Airlines Logo
7:00 am - 7:10 pm
PDX
-
SIN
21h 10m
1 stop
Singapore Airlines Logo
9:15 am - 4:50 pm
SIN
-
PDX
22h 35m
1 stop
$830Singapore Airlines
Wed, Sep 16 - Tue, Sep 22
Singapore Airlines Logo
7:15 am - 7:10 pm
PDX
-
SIN
20h 55m
1 stop
Singapore Airlines Logo
9:15 am - 8:50 pm
SIN
-
PDX
26h 35m
1 stop
$871Singapore Airlines
Sat, Aug 15 - Wed, Sep 9
Multiple Airlines Logo
7:15 am - 7:10 pm
PDX
-
SIN
20h 55m
1 stop
Multiple Airlines Logo
9:15 am - 4:50 pm
SIN
-
PDX
22h 35m
1 stop
$880Multiple Airlines
Sat, Aug 15 - Mon, Aug 31
Singapore Airlines Logo
7:00 am - 7:10 pm
PDX
-
SIN
21h 10m
1 stop
Singapore Airlines Logo
9:15 am - 1:50 pm
SIN
-
PDX
19h 35m
1 stop
$909Singapore Airlines
Sat, Sep 12 - Sat, Sep 19
Singapore Airlines Logo
7:15 am - 7:10 pm
PDX
-
SIN
20h 55m
1 stop
Singapore Airlines Logo
9:25 am - 9:55 pm
SIN
-
PDX
27h 30m
2 stops
$928Singapore Airlines
Sat, Aug 15 - Wed, Sep 9
Singapore Airlines Logo
7:00 am - 7:10 pm
PDX
-
SIN
21h 10m
1 stop
Singapore Airlines Logo
8:45 pm - 9:25 am
SIN
-
PDX
27h 40m
1 stop
$952Singapore Airlines
Sat, Aug 15 - Mon, Aug 31
Singapore Airlines Logo
5:40 pm - 7:40 am
PDX
-
SIN
23h 00m
1 stop
Singapore Airlines Logo
9:15 am - 1:50 pm
SIN
-
PDX
19h 35m
1 stop
$953Singapore Airlines
Sat, Sep 19 - Sat, Sep 26
Singapore Airlines Logo
7:00 am - 7:10 pm
PDX
-
SIN
21h 10m
1 stop
Singapore Airlines Logo
8:45 pm - 9:25 am
SIN
-
PDX
27h 40m
1 stop
$957Singapore Airlines
Sat, Aug 15 - Mon, Aug 31
Singapore Airlines Logo
7:20 am - 7:10 pm
PDX
-
SIN
20h 50m
1 stop
Singapore Airlines Logo
8:45 pm - 10:25 am
SIN
-
PDX
28h 40m
1 stop
$967Singapore Airlines
Tue, Aug 11 - Wed, Aug 19

Singapore Airlines flights from Portland to Singapore

Our best Singapore Airlines deals on Portland to Singapore flight tickets
Singapore Airlines
Sep 1
PDX7:00 amPortland
21h 10m
1 stop
SIN7:10 pmSingapore Changi
Sep 30
SIN9:15 amSingapore Changi
22h 35m
1 stop
PDX4:50 pmPortland
$800
Singapore Airlines
Sep 16
PDX7:00 amPortland
21h 10m
1 stop
SIN7:10 pmSingapore Changi
Sep 22
SIN9:15 amSingapore Changi
22h 35m
1 stop
PDX4:50 pmPortland
$830
Singapore Airlines
Sep 13
PDX7:00 amPortland
21h 10m
1 stop
SIN7:10 pmSingapore Changi
Sep 23
SIN9:15 amSingapore Changi
22h 35m
1 stop
PDX4:50 pmPortland
$871

China Eastern flights from Portland to Singapore

Our best China Eastern deals on Portland to Singapore flight tickets
China Eastern
Apr 22
PDX6:45 amPortland
42h 00m
2 stops
SIN3:45 pmSingapore Changi
May 1
SIN12:55 amSingapore Changi
29h 43m
2 stops
PDX3:38 pmPortland
$1,072
China Eastern
Sep 11
PDX6:30 amPortland
31h 55m
2 stops
SIN5:25 amSingapore Changi
Sep 15
SIN11:10 pmSingapore Changi
32h 00m
2 stops
PDX4:10 pmPortland
$1,157

momondo 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, momondo users made 832,500 searches. Data last updated March 30, 2026.
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

Cheapest round-trip

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 9/1

7:00 am-7:10 pm

1 stop21h 10m

Singapore Changi

Wed 9/30

9:15 am-4:50 pm

1 stop22h 35m

$800

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 9/16

7:00 am-7:10 pm

1 stop21h 10m

Singapore Changi

Tue 9/22

9:15 am-4:50 pm

1 stop22h 35m

$830

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 8/15

7:15 am-7:10 pm

1 stop20h 55m

Singapore Changi

Wed 9/9

9:15 am-8:50 pm

1 stop26h 35m

$871

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 8/15

7:15 am-7:10 pm

1 stop20h 55m

Singapore Changi

Mon 8/31

9:15 am-4:50 pm

1 stop22h 35m

$880
Quickest round-trip

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 9/12

7:00 am-7:10 pm

1 stop21h 10m

Singapore Changi

Sat 9/19

9:15 am-1:50 pm

1 stop19h 35m

$909

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 8/15

7:15 am-7:10 pm

1 stop20h 55m

Singapore Changi

Wed 9/9

9:25 am-9:55 pm

2 stops27h 30m

$928

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 8/15

7:00 am-7:10 pm

1 stop21h 10m

Singapore Changi

Mon 8/31

8:45 pm-9:25 am

1 stop27h 40m

$952

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 9/19

5:40 pm-7:40 am

1 stop23h 00m

Singapore Changi

Sat 9/26

9:15 am-1:50 pm

1 stop19h 35m

$953

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 8/15

7:00 am-7:10 pm

1 stop21h 10m

Singapore Changi

Mon 8/31

8:45 pm-9:25 am

1 stop27h 40m

$957

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 8/11

7:20 am-7:10 pm

1 stop20h 50m

Singapore Changi

Wed 8/19

8:45 pm-10:25 am

1 stop28h 40m

$967

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 typical price of a round-trip flight between Portland and Singapore?

What is the cheapest month to fly to Singapore?

The month of May is, on average, the cheapest month to fly to Singapore from Portland, with most prices found around $858. If you aren’t able to travel to Singapore during the month of May, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $874.

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 $1,035 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 $778 on momondo.

Can stopping save me money on Portland to Singapore flights?

You could potentially save up to 42% on your flight if you consider stops on a Portland to Singapore flight.

How have Portland to Singapore flight prices changed over time?

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

20h 50m

Direct flights

None
The fastest flight from Portland to Singapore takes 20h 50m
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 50m.

  • 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?

  • 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?

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 CanadaPriceFrom $694Free CancellationRating
7.1
10,866 reviews
Search Air Canada flights
Korean AirPriceFrom $786Free CancellationRating
8.4
1,203 reviews
Search Korean Air flights
Singapore AirlinesPriceFrom $837Free CancellationRating
8.2
1,484 reviews
Search Singapore Airlines flights
United AirlinesPriceFrom $1,012Free CancellationRating
7.4
9,525 reviews
Search United 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

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Fly your favorite airline to Singapore

Airlines are sorted and displayed according to clicks in the past 7 days on momondo
Air Canada
Singapore Airlines
United Airlines
Korean Air