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Cheap flights from Portland to Singapore from $451

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 9/2. 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
6:07 am - 5:35 pm
PDX
-
SIN
20h 28m
1 stop
Singapore Airlines Logo
9:15 am - 1:50 pm
SIN
-
PDX
19h 35m
1 stop
$925Singapore Airlines
dim., oct. 11 - lun., oct. 19
Singapore Airlines Logo
6:07 am - 5:35 pm
PDX
-
SIN
20h 28m
1 stop
Singapore Airlines Logo
9:00 am - 12:22 pm
SIN
-
PDX
18h 22m
1 stop
$951Singapore Airlines
sam., oct. 3 - ven., oct. 23
Multiple Airlines Logo
6:05 am - 5:35 pm
PDX
-
SIN
20h 30m
1 stop
Multiple Airlines Logo
9:15 am - 4:50 pm
SIN
-
PDX
22h 35m
1 stop
$957Multiple Airlines
mar., sept. 29 - lun., oct. 5
Qatar Airways Logo
11:45 am - 8:50 am
PDX
-
SIN
30h 05m
2 stops
Qatar Airways Logo
3:15 am - 10:01 pm
SIN
-
PDX
33h 46m
2 stops
$1,007Qatar Airways
jeu., sept. 17 - jeu., oct. 1
Qatar Airways Logo
5:00 am - 9:15 pm
PDX
-
SIN
49h 15m
2 stops
Qatar Airways Logo
3:15 am - 4:49 pm
SIN
-
PDX
28h 34m
2 stops
$1,009Qatar Airways
lun., août 17 - lun., août 31
Qatar Airways Logo
11:45 am - 9:15 pm
PDX
-
SIN
42h 30m
2 stops
Qatar Airways Logo
3:15 am - 10:01 pm
SIN
-
PDX
33h 46m
2 stops
$1,013Qatar Airways
jeu., sept. 10 - mer., sept. 23
Singapore Airlines Logo
2:50 pm - 7:40 am
PDX
-
SIN
25h 50m
1 stop
Singapore Airlines Logo
9:00 am - 12:22 pm
SIN
-
PDX
18h 22m
1 stop
$1,021Singapore Airlines
jeu., oct. 1 - sam., oct. 10
Qatar Airways Logo
9:40 am - 8:50 am
PDX
-
SIN
32h 10m
2 stops
Qatar Airways Logo
3:15 am - 12:10 am
SIN
-
PDX
35h 55m
2 stops
$1,042Qatar Airways
dim., oct. 11 - dim., oct. 18
Singapore Airlines Logo
2:50 pm - 7:40 am
PDX
-
SIN
25h 50m
1 stop
Singapore Airlines Logo
9:00 am - 7:50 pm
SIN
-
PDX
25h 50m
1 stop
$1,045Singapore Airlines
jeu., sept. 10 - jeu., sept. 24
Qatar Airways Logo
11:45 am - 3:45 pm
PDX
-
SIN
37h 00m
2 stops
Qatar Airways Logo
3:15 am - 4:50 pm
SIN
-
PDX
28h 35m
2 stops
$1,048Qatar Airways
dim., août 23 - jeu., sept. 10

Qatar Airways flights from Portland to Singapore

Our best Qatar Airways deals on Portland to Singapore flight tickets
Qatar Airways
Sep 17
PDX11:45 amPortland
30h 05m
2 stops
SIN8:50 amSingapore Changi
Oct 1
SIN3:15 amSingapore Changi
33h 46m
2 stops
PDX10:01 pmPortland
$1,007
Qatar Airways
Aug 17
PDX5:00 amPortland
49h 15m
2 stops
SIN9:15 pmSingapore Changi
Aug 31
SIN3:15 amSingapore Changi
28h 34m
2 stops
PDX4:49 pmPortland
$1,009
Qatar Airways
Sep 10
PDX11:45 amPortland
42h 30m
2 stops
SIN9:15 pmSingapore Changi
Sep 23
SIN3:15 amSingapore Changi
33h 46m
2 stops
PDX10:01 pmPortland
$1,013

Singapore Airlines flights from Portland to Singapore

Our best Singapore Airlines deals on Portland to Singapore flight tickets
Singapore Airlines
Oct 11
PDX6:07 amPortland
20h 28m
1 stop
SIN5:35 pmSingapore Changi
Oct 19
SIN9:15 amSingapore Changi
19h 35m
1 stop
PDX1:50 pmPortland
$925
Singapore Airlines
Oct 3
PDX6:07 amPortland
20h 28m
1 stop
SIN5:35 pmSingapore Changi
Oct 23
SIN9:00 amSingapore Changi
18h 22m
1 stop
PDX12:22 pmPortland
$951
Singapore Airlines
Oct 1
PDX2:50 pmPortland
25h 50m
1 stop
SIN7:40 amSingapore Changi
Oct 10
SIN9:00 amSingapore Changi
18h 22m
1 stop
PDX12:22 pmPortland
$1,021

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 avril 29, 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

dim. 10/11

6:07 am-5:35 pm

1 stop20h 28m

Singapore Changi

lun. 10/19

9:15 am-1:50 pm

1 stop19h 35m

$925
Quickest round-trip

PortlandSingapore

PDX - SIN

PDXSIN

Portland

sam. 10/3

6:07 am-5:35 pm

1 stop20h 28m

Singapore Changi

ven. 10/23

9:00 am-12:22 pm

1 stop18h 22m

$951

PortlandSingapore

PDX - SIN

PDXSIN

Portland

mar. 9/29

6:05 am-5:35 pm

1 stop20h 30m

Singapore Changi

lun. 10/5

9:15 am-4:50 pm

1 stop22h 35m

$957

PortlandSingapore

PDX - SIN

PDXSIN

Portland

jeu. 9/17

11:45 am-8:50 am

2 stops30h 05m

Singapore Changi

jeu. 10/1

3:15 am-10:01 pm

2 stops33h 46m

$1,007

PortlandSingapore

PDX - SIN

PDXSIN

Portland

lun. 8/17

5:00 am-9:15 pm

2 stops49h 15m

Singapore Changi

lun. 8/31

3:15 am-4:49 pm

2 stops28h 34m

$1,009

PortlandSingapore

PDX - SIN

PDXSIN

Portland

jeu. 9/10

11:45 am-9:15 pm

2 stops42h 30m

Singapore Changi

mer. 9/23

3:15 am-10:01 pm

2 stops33h 46m

$1,013

PortlandSingapore

PDX - SIN

PDXSIN

Portland

jeu. 10/1

2:50 pm-7:40 am

1 stop25h 50m

Singapore Changi

sam. 10/10

9:00 am-12:22 pm

1 stop18h 22m

$1,021

PortlandSingapore

PDX - SIN

PDXSIN

Portland

dim. 10/11

9:40 am-8:50 am

2 stops32h 10m

Singapore Changi

dim. 10/18

3:15 am-12:10 am

2 stops35h 55m

$1,042

PortlandSingapore

PDX - SIN

PDXSIN

Portland

jeu. 9/10

2:50 pm-7:40 am

1 stop25h 50m

Singapore Changi

jeu. 9/24

9:00 am-7:50 pm

1 stop25h 50m

$1,045

PortlandSingapore

PDX - SIN

PDXSIN

Portland

dim. 8/23

11:45 am-3:45 pm

2 stops37h 00m

Singapore Changi

jeu. 9/10

3:15 am-4:50 pm

2 stops28h 35m

$1,048

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 April is, on average, the cheapest month to fly to Singapore from Portland, with most prices found around $538. If you aren’t able to travel to Singapore during the month of April, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $693.

How far in advance should I book a flight from Portland 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 $1,046 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 22% 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

20h 28m

Direct flights

None
The fastest flight from Portland to Singapore takes 20h 28m
There are no direct flights from Portland to Singapore. There are no popular flight routes from Portland to Singapore.
Search flight deals

Frequently asked questions about flying from Portland to Singapore

  • 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
10,979 reviews
Search Air Canada flights
Korean AirPriceFrom $786Free CancellationRating
8.4
1,214 reviews
Search Korean Air flights
Singapore AirlinesPriceFrom $837Free CancellationRating
8.2
1,504 reviews
Search Singapore Airlines flights
United AirlinesPriceFrom $1,012Free CancellationRating
7.4
9,680 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.

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