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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 8/6. 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
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 - 1:50 pm
SIN
-
PDX
19h 35m
1 stop
$799Singapore Airlines
Wed, Sep 16 - Tue, Sep 22
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
7:00 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
$871Singapore Airlines
Sun, Sep 13 - Wed, Sep 23
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
$880Singapore Airlines
Sat, Sep 12 - Sat, Sep 19
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
7:00 am - 7:10 pm
PDX
-
SIN
21h 10m
1 stop
Singapore Airlines Logo
9:00 am - 12:22 pm
SIN
-
PDX
18h 22m
1 stop
$933Singapore Airlines
Thu, Sep 10 - Sun, Sep 20
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
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

China Airlines flights from Portland to Singapore

Our best China Airlines deals on Portland to Singapore flight tickets
China Airlines
Aug 15
PDX5:35 pmPortland
28h 00m
2 stops
SIN12:35 pmSingapore Changi
Aug 31
SIN1:45 pmSingapore Changi
35h 01m
2 stops
PDX9:46 amPortland
$1,097
China Airlines
Sep 10
PDX5:40 pmPortland
27h 55m
2 stops
SIN12:35 pmSingapore Changi
Sep 19
SIN2:00 amSingapore Changi
46h 25m
2 stops
PDX9:25 amPortland
$1,105
China Airlines
Aug 15
PDX5:35 pmPortland
28h 00m
2 stops
SIN12:35 pmSingapore Changi
Aug 31
SIN1:45 pmSingapore Changi
34h 40m
2 stops
PDX9:25 amPortland
$1,119

Singapore Airlines flights from Portland to Singapore

Our best Singapore Airlines deals on Portland to Singapore flight tickets
Singapore Airlines
Sep 16
PDX7:00 amPortland
21h 10m
1 stop
SIN7:10 pmSingapore Changi
Sep 22
SIN9:15 amSingapore Changi
19h 35m
1 stop
PDX1:50 pmPortland
$799
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

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 28, 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

Wed 9/16

7:00 am-7:10 pm

1 stop21h 10m

Singapore Changi

Tue 9/22

9:15 am-1:50 pm

1 stop19h 35m

$799

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

Sun 9/13

7:00 am-7:10 pm

1 stop21h 10m

Singapore Changi

Wed 9/23

9:15 am-4:50 pm

1 stop22h 35m

$871

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

$880

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
Quickest round-trip

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 9/10

7:00 am-7:10 pm

1 stop21h 10m

Singapore Changi

Sun 9/20

9:00 am-12:22 pm

1 stop18h 22m

$933

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 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 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 25% on your flight if you consider stops on a Portland to Singapore flight.

Cheap Portland to Singapore flight deals and tips

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

Fastest flight time

21h 10m

Direct flights

None
The fastest flight from Portland to Singapore takes 21h 10m
There are no direct flights from Portland to Singapore. There are no popular flight routes from Portland to Singapore.
Search flight deals

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

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

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

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

    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.

  • What documentation or ID do you need to fly to Singapore?

    The travel and health documents required for your trip to Singapore 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. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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
10,853 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
9,500 reviews
Search United Airlines flights

Why use momondo?

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

It is quick and easy to find Portland to Singapore flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Singapore that suits you.

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

Yes. momondo allows you to filter the results for Portland to Singapore flights to just show those with flexible booking policies.

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?

Of course. momondo tracks the price of Portland to Singapore flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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.
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