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Cheap flights from Portland to Singapore from $321

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 3/11. 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
5:00 am - 5:35 pm
PDX
-
SIN
21h 35m
1 stop
Singapore Airlines Logo
8:45 pm - 9:47 am
SIN
-
PDX
28h 02m
1 stop
$830Singapore Airlines
Fri, May 29 - Mon, Jun 1
Air Canada Logo
7:05 pm - 5:15 am
PDX
-
SIN
19h 10m
1 stop
Air Canada Logo
7:00 am - 9:10 am
SIN
-
PDX
17h 10m
1 stop
$856Air Canada
Thu, Apr 16 - Thu, Apr 30
Multiple Airlines Logo
2:37 pm - 5:25 am
PDX
-
SIN
47h 48m
2 stops
Multiple Airlines Logo
12:55 am - 4:30 pm
SIN
-
PDX
30h 35m
2 stops
$878Multiple Airlines
Wed, Apr 1 - Tue, Apr 7
Singapore Airlines Logo
7:00 am - 7:10 pm
PDX
-
SIN
21h 10m
1 stop
Singapore Airlines Logo
9:00 am - 7:34 pm
SIN
-
PDX
25h 34m
1 stop
$899Singapore Airlines
Wed, Apr 22 - Sun, May 3
Multiple Airlines Logo
1:36 pm - 9:35 am
PDX
-
SIN
28h 59m
2 stops
Multiple Airlines Logo
11:55 pm - 6:47 pm
SIN
-
PDX
33h 52m
2 stops
$903Multiple Airlines
Wed, Mar 11 - Tue, Mar 17
Cathay Pacific Logo
9:30 pm - 12:25 am
PDX
-
SIN
35h 55m
2 stops
Cathay Pacific Logo
10:00 am - 9:50 am
SIN
-
PDX
38h 50m
2 stops
$922Cathay Pacific
Sun, Mar 8 - Wed, Mar 18
Multiple Airlines Logo
7:38 pm - 12:40 pm
PDX
-
SIN
26h 02m
2 stops
Multiple Airlines Logo
2:00 pm - 9:46 am
SIN
-
PDX
34h 46m
2 stops
$933Multiple Airlines
Sat, Aug 15 - Mon, Aug 31
Multiple Airlines Logo
5:51 pm - 12:40 pm
PDX
-
SIN
27h 49m
2 stops
Multiple Airlines Logo
2:00 pm - 9:30 am
SIN
-
PDX
34h 30m
2 stops
$934Multiple Airlines
Wed, Apr 22 - Sat, May 2
Multiple Airlines Logo
7:14 am - 5:25 am
PDX
-
SIN
31h 11m
2 stops
Multiple Airlines Logo
12:55 am - 11:58 pm
SIN
-
PDX
38h 03m
2 stops
$936Multiple Airlines
Thu, Apr 9 - Wed, Apr 15
Cathay Pacific Logo
7:05 am - 12:25 am
PDX
-
SIN
26h 20m
2 stops
Cathay Pacific Logo
6:00 pm - 9:50 am
SIN
-
PDX
30h 50m
2 stops
$937Cathay Pacific
Wed, Mar 11 - Tue, Mar 17

Air Canada flights from Portland to Singapore

Our best Air Canada deals on Portland to Singapore flight tickets
Air Canada
Apr 16
PDX7:05 pmPortland
19h 10m
1 stop
SIN5:15 amSingapore Changi
Apr 30
SIN7:00 amSingapore Changi
17h 10m
1 stop
PDX9:10 amPortland
$856
Air Canada
Apr 16
PDX9:50 amPortland
28h 25m
1 stop
SIN5:15 amSingapore Changi
Apr 30
SIN10:50 pmSingapore Changi
30h 55m
2 stops
PDX2:45 pmPortland
$1,041
Air Canada
Feb 27
PDX3:15 pmPortland
28h 00m
2 stops
SIN11:15 amSingapore Changi
Mar 10
SIN8:50 amSingapore Changi
20h 50m
1 stop
PDX2:40 pmPortland
$5,479

Singapore Airlines flights from Portland to Singapore

Our best Singapore Airlines deals on Portland to Singapore flight tickets
Singapore Airlines
May 29
PDX5:00 amPortland
21h 35m
1 stop
SIN5:35 pmSingapore Changi
Jun 1
SIN8:45 pmSingapore Changi
28h 02m
1 stop
PDX9:47 amPortland
$830
Singapore Airlines
Apr 22
PDX7:00 amPortland
21h 10m
1 stop
SIN7:10 pmSingapore Changi
May 3
SIN9:00 amSingapore Changi
25h 34m
1 stop
PDX7:34 pmPortland
$899
Singapore Airlines
Aug 15
PDX5:00 amPortland
21h 35m
1 stop
SIN5:35 pmSingapore Changi
Aug 31
SIN8:45 pmSingapore Changi
27h 40m
1 stop
PDX9:25 amPortland
$940

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 February 25, 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

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Fri 5/29

5:00 am-5:35 pm

1 stop21h 35m

Singapore Changi

Mon 6/1

8:45 pm-9:47 am

1 stop28h 02m

$830

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 4/16

7:05 pm-5:15 am

1 stop19h 10m

Singapore Changi

Thu 4/30

7:00 am-9:10 am

1 stop17h 10m

$856

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 4/1

2:37 pm-5:25 am

2 stops47h 48m

Singapore Changi

Tue 4/7

12:55 am-4:30 pm

2 stops30h 35m

$878

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 4/22

7:00 am-7:10 pm

1 stop21h 10m

Singapore Changi

Sun 5/3

9:00 am-7:34 pm

1 stop25h 34m

$899

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 3/11

1:36 pm-9:35 am

2 stops28h 59m

Singapore Changi

Tue 3/17

11:55 pm-6:47 pm

2 stops33h 52m

$903

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 3/8

9:30 pm-12:25 am

2 stops35h 55m

Singapore Changi

Wed 3/18

10:00 am-9:50 am

2 stops38h 50m

$922

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 8/15

7:38 pm-12:40 pm

2 stops26h 02m

Singapore Changi

Mon 8/31

2:00 pm-9:46 am

2 stops34h 46m

$933

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 4/22

5:51 pm-12:40 pm

2 stops27h 49m

Singapore Changi

Sat 5/2

2:00 pm-9:30 am

2 stops34h 30m

$934

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 4/9

7:14 am-5:25 am

2 stops31h 11m

Singapore Changi

Wed 4/15

12:55 am-11:58 pm

2 stops38h 03m

$936

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 3/11

7:05 am-12:25 am

2 stops26h 20m

Singapore Changi

Tue 3/17

6:00 pm-9:50 am

2 stops30h 50m

$937

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 September is, on average, the cheapest month to fly to Singapore from Portland, with most prices found around $753. 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 $837.

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 $1,013 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 14% 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 41m

Direct flights

None
The fastest flight from Portland to Singapore takes 20h 41m
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
10,742 reviews
Search Air Canada flights
Korean AirPriceFrom $792Free CancellationRating
8.4
1,195 reviews
Search Korean Air flights
DeltaPriceFrom $800Free CancellationRating
7.9
8,238 reviews
Search Delta flights
Singapore AirlinesPriceFrom $837Free CancellationRating
8.2
1,463 reviews
Search Singapore Airlines flights
United AirlinesPriceFrom $870Free CancellationRating
7.4
9,344 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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