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Cheap flights from Portland to Singapore from $346

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 3/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
7:30 am - 7:00 amPDX-SIN
31h 30m2 stops
Air Canada Logo
8:50 am - 9:15 amSIN-PDX
16h 25m1 stop
$734Air Canada
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Thu, Nov 6 - Thu, Nov 20
Air Canada Logo
3:15 pm - 7:00 amPDX-SIN
23h 45m1 stop
Air Canada Logo
8:50 am - 9:15 amSIN-PDX
16h 25m1 stop
$735Air Canada
Find Deal
Tue, Nov 18 - Tue, Nov 25
Air Canada Logo
3:15 pm - 7:00 amPDX-SIN
23h 45m1 stop
Air Canada Logo
8:50 am - 6:30 pmSIN-PDX
25h 40m1 stop
$736Air Canada
Find Deal
Thu, Nov 6 - Thu, Nov 20
Air Canada Logo
3:15 pm - 7:00 amPDX-SIN
23h 45m1 stop
Air Canada Logo
9:00 pm - 9:15 amSIN-PDX
28h 15m2 stops
$737Air Canada
Find Deal
Tue, Nov 4 - Mon, Nov 24
Air Canada Logo
7:30 am - 7:00 amPDX-SIN
31h 30m2 stops
Air Canada Logo
8:50 am - 10:51 pmSIN-PDX
30h 01m2 stops
$740Air Canada
Find Deal
Thu, Nov 6 - Thu, Nov 20
Air Canada Logo
6:00 am - 7:00 amPDX-SIN
33h 00m2 stops
Air Canada Logo
8:50 am - 10:51 pmSIN-PDX
30h 01m2 stops
$742Air Canada
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Thu, Nov 6 - Thu, Nov 20
Multiple Airlines Logo
11:59 pm - 7:00 amPDX-SIN
39h 01m2 stops
Multiple Airlines Logo
8:50 am - 2:40 pmSIN-PDX
21h 50m1 stop
$750Multiple Airlines
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Mon, Nov 3 - Tue, Nov 25
Multiple Airlines Logo
11:12 pm - 7:00 amPDX-SIN
39h 48m2 stops
Multiple Airlines Logo
9:00 pm - 6:30 pmSIN-PDX
37h 30m2 stops
$751Multiple Airlines
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Mon, Nov 3 - Tue, Nov 25
Singapore Airlines Logo
10:28 pm - 5:45 pmPDX-SIN
27h 17m1 stop
Singapore Airlines Logo
9:00 am - 1:50 pmSIN-PDX
20h 50m1 stop
$843Singapore Airlines
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Sat, Nov 8 - Fri, Dec 12
Delta Logo
5:26 pm - 5:00 amPDX-SIN
43h 34m2 stops
Delta Logo
10:40 am - 1:18 pmSIN-PDX
42h 38m2 stops
$872Delta
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Sun, Nov 16 - Thu, Nov 27

Air Canada flights from Portland to Singapore

Our best Air Canada deals on Portland to Singapore flight tickets
Air Canada
Nov 6
PDX7:30 amPortland
31h 30m
2 stops
SIN7:00 amSingapore Changi
Nov 20
SIN8:50 amSingapore Changi
16h 25m
1 stop
PDX9:15 amPortland
$734
Find similar
Air Canada
Nov 18
PDX3:15 pmPortland
23h 45m
1 stop
SIN7:00 amSingapore Changi
Nov 25
SIN8:50 amSingapore Changi
16h 25m
1 stop
PDX9:15 amPortland
$735
Find similar
Air Canada
Nov 6
PDX3:15 pmPortland
23h 45m
1 stop
SIN7:00 amSingapore Changi
Nov 20
SIN8:50 amSingapore Changi
25h 40m
1 stop
PDX6:30 pmPortland
$736
Find similar

Cathay Pacific flights from Portland to Singapore

Our best Cathay Pacific deals on Portland to Singapore flight tickets
Cathay Pacific
Nov 6
PDX7:00 amPortland
30h 40m
2 stops
SIN5:40 amSingapore Changi
Nov 14
SIN7:40 amSingapore Changi
29h 10m
2 stops
PDX8:50 pmPortland
$1,080
Find similar
Cathay Pacific
Nov 3
PDX6:00 amPortland
37h 55m
2 stops
SIN11:55 amSingapore Changi
Nov 24
SIN1:25 amSingapore Changi
37h 00m
2 stops
PDX10:25 pmPortland
$1,177
Find similar
Cathay Pacific
Oct 26
PDX7:00 amPortland
26h 25m
2 stops
SIN12:25 amSingapore Changi
Oct 31
SIN1:25 amSingapore Changi
37h 12m
2 stops
PDX11:37 pmPortland
$1,317
Find similar

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 October 23, 2025.
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

Thu 11/6

7:30 am-7:00 am

2 stops31h 30m

Singapore Changi

Thu 11/20

8:50 am-9:15 am

1 stop16h 25m

$734

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 11/18

3:15 pm-7:00 am

1 stop23h 45m

Singapore Changi

Tue 11/25

8:50 am-9:15 am

1 stop16h 25m

$735

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 11/6

3:15 pm-7:00 am

1 stop23h 45m

Singapore Changi

Thu 11/20

8:50 am-6:30 pm

1 stop25h 40m

$736

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 11/4

3:15 pm-7:00 am

1 stop23h 45m

Singapore Changi

Mon 11/24

9:00 pm-9:15 am

2 stops28h 15m

$737

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 11/6

7:30 am-7:00 am

2 stops31h 30m

Singapore Changi

Thu 11/20

8:50 am-10:51 pm

2 stops30h 01m

$740

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 11/6

6:00 am-7:00 am

2 stops33h 00m

Singapore Changi

Thu 11/20

8:50 am-10:51 pm

2 stops30h 01m

$742

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 11/3

11:59 pm-7:00 am

2 stops39h 01m

Singapore Changi

Tue 11/25

8:50 am-2:40 pm

1 stop21h 50m

$750

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 11/3

11:12 pm-7:00 am

2 stops39h 48m

Singapore Changi

Tue 11/25

9:00 pm-6:30 pm

2 stops37h 30m

$751

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 11/8

10:28 pm-5:45 pm

1 stop27h 17m

Singapore Changi

Fri 12/12

9:00 am-1:50 pm

1 stop20h 50m

$843

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 11/16

5:26 pm-5:00 am

2 stops43h 34m

Singapore Changi

Thu 11/27

10:40 am-1:18 pm

2 stops42h 38m

$872

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 $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 $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 $774 on momondo.

Can stopping save me money on Portland to Singapore flights?

You could potentially save up to 37% 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

Direct flights

None
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
10,346 reviews
Search Air Canada flights
DeltaPriceFrom $800Free CancellationRating
7.9
7,981 reviews
Search Delta flights
Korean AirPriceFrom $808Free CancellationRating
8.4
1,153 reviews
Search Korean Air flights
United AirlinesPriceFrom $868Free CancellationRating
7.4
8,991 reviews
Search United Airlines flights
Singapore AirlinesPriceFrom $891Free CancellationRating
8.1
1,384 reviews
Search Singapore 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

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