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Cheap flights from Portland to Singapore from $449

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 8/20. 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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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
9:30 pm - 5:45 pm
PDX
-
SIN
28h 15m
1 stop
Singapore Airlines Logo
9:00 am - 11:19 am
SIN
-
PDX
18h 19m
1 stop
$905Singapore Airlines
Thu, Nov 5 - Tue, Nov 17
Singapore Airlines Logo
5:10 am - 5:35 pm
PDX
-
SIN
21h 25m
1 stop
Singapore Airlines Logo
9:00 am - 4:50 pm
SIN
-
PDX
22h 50m
1 stop
$992Singapore Airlines
Thu, Sep 3 - Thu, Sep 10
Qatar Airways Logo
11:45 am - 3:45 pm
PDX
-
SIN
37h 00m
2 stops
Qatar Airways Logo
7:40 pm - 4:50 pm
SIN
-
PDX
36h 10m
2 stops
$1,014Qatar Airways
Thu, Sep 3 - Thu, Sep 10
Qatar Airways Logo
11:45 am - 3:45 pm
PDX
-
SIN
37h 00m
2 stops
Qatar Airways Logo
7:40 pm - 7:50 pm
SIN
-
PDX
39h 10m
2 stops
$1,032Qatar Airways
Thu, Sep 3 - Thu, Sep 10
Singapore Airlines Logo
6:05 am - 5:35 pm
PDX
-
SIN
20h 30m
1 stop
Singapore Airlines Logo
9:00 am - 1:27 pm
SIN
-
PDX
19h 27m
1 stop
$1,036Singapore Airlines
Thu, Oct 1 - Sat, Oct 10
Qatar Airways Logo
10:45 am - 8:45 am
PDX
-
SIN
30h 00m
2 stops
Qatar Airways Logo
8:15 pm - 3:25 pm
SIN
-
PDX
35h 10m
2 stops
$1,042Qatar Airways
Thu, Nov 5 - Tue, Nov 17
Qatar Airways Logo
12:03 pm - 3:45 pm
PDX
-
SIN
36h 42m
2 stops
Qatar Airways Logo
3:15 am - 7:50 pm
SIN
-
PDX
31h 35m
2 stops
$1,052Qatar Airways
Mon, Aug 17 - Mon, Aug 31
Qatar Airways Logo
12:03 pm - 3:45 pm
PDX
-
SIN
36h 42m
2 stops
Qatar Airways Logo
7:40 pm - 7:50 pm
SIN
-
PDX
39h 10m
2 stops
$1,064Qatar Airways
Mon, Aug 17 - Tue, Sep 1
Qatar Airways Logo
11:45 am - 3:45 pm
PDX
-
SIN
37h 00m
2 stops
Qatar Airways Logo
3:15 am - 9:59 pm
SIN
-
PDX
33h 44m
2 stops
$1,070Qatar Airways
Thu, Oct 1 - Fri, Oct 9
Singapore Airlines Logo
7:19 am - 7:10 pm
PDX
-
SIN
20h 51m
1 stop
Singapore Airlines Logo
9:15 am - 4:50 pm
SIN
-
PDX
22h 35m
1 stop
$1,081Singapore Airlines
Mon, Aug 17 - Tue, Sep 1

Air Canada flights from Portland to Singapore

Our best Air Canada deals on Portland to Singapore flight tickets
Air Canada
Jul 17
PDX7:45 pmPortland
18h 30m
1 stop
SIN5:15 amSingapore Changi
Jul 25
SIN7:00 amSingapore Changi
17h 31m
1 stop
PDX9:31 amPortland
$1,267
Air Canada
Jun 4
PDX3:30 pmPortland
22h 45m
1 stop
SIN5:15 amSingapore Changi
Jun 16
SIN7:00 amSingapore Changi
17h 30m
1 stop
PDX9:30 amPortland
$1,286
Air Canada
May 18
PDX7:45 pmPortland
24h 30m
2 stops
SIN11:15 amSingapore Changi
Jun 9
SIN7:00 amSingapore Changi
32h 50m
2 stops
PDX12:50 amPortland
$1,289

Qatar Airways flights from Portland to Singapore

Our best Qatar Airways deals on Portland to Singapore flight tickets
Qatar Airways
Sep 3
PDX11:45 amPortland
37h 00m
2 stops
SIN3:45 pmSingapore Changi
Sep 10
SIN7:40 pmSingapore Changi
36h 10m
2 stops
PDX4:50 pmPortland
$1,014
Qatar Airways
Sep 3
PDX11:45 amPortland
37h 00m
2 stops
SIN3:45 pmSingapore Changi
Sep 10
SIN7:40 pmSingapore Changi
39h 10m
2 stops
PDX7:50 pmPortland
$1,032
Qatar Airways
Nov 5
PDX10:45 amPortland
30h 00m
2 stops
SIN8:45 amSingapore Changi
Nov 17
SIN8:15 pmSingapore Changi
35h 10m
2 stops
PDX3:25 pmPortland
$1,042

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 May 16, 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

Thu 11/5

9:30 pm-5:45 pm

1 stop28h 15m

Singapore Changi

Tue 11/17

9:00 am-11:19 am

1 stop18h 19m

$905

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 9/3

5:10 am-5:35 pm

1 stop21h 25m

Singapore Changi

Thu 9/10

9:00 am-4:50 pm

1 stop22h 50m

$992

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 9/3

11:45 am-3:45 pm

2 stops37h 00m

Singapore Changi

Thu 9/10

7:40 pm-4:50 pm

2 stops36h 10m

$1,014

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 9/3

11:45 am-3:45 pm

2 stops37h 00m

Singapore Changi

Thu 9/10

7:40 pm-7:50 pm

2 stops39h 10m

$1,032
Quickest round-trip

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 10/1

6:05 am-5:35 pm

1 stop20h 30m

Singapore Changi

Sat 10/10

9:00 am-1:27 pm

1 stop19h 27m

$1,036

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 11/5

10:45 am-8:45 am

2 stops30h 00m

Singapore Changi

Tue 11/17

8:15 pm-3:25 pm

2 stops35h 10m

$1,042

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 8/17

12:03 pm-3:45 pm

2 stops36h 42m

Singapore Changi

Mon 8/31

3:15 am-7:50 pm

2 stops31h 35m

$1,052

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 8/17

12:03 pm-3:45 pm

2 stops36h 42m

Singapore Changi

Tue 9/1

7:40 pm-7:50 pm

2 stops39h 10m

$1,064

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 10/1

11:45 am-3:45 pm

2 stops37h 00m

Singapore Changi

Fri 10/9

3:15 am-9:59 pm

2 stops33h 44m

$1,070

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 8/17

7:19 am-7:10 pm

1 stop20h 51m

Singapore Changi

Tue 9/1

9:15 am-4:50 pm

1 stop22h 35m

$1,081

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 $693. If you aren’t able to travel to Singapore during the month of September, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $718.

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 $1,050 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 9% 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 25m

Direct flights

None
The fastest flight from Portland to Singapore takes 21h 25m
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
11,050 reviews
Search Air Canada flights
Korean AirPriceFrom $786Free CancellationRating
8.4
1,217 reviews
Search Korean Air flights
Singapore AirlinesPriceFrom $837Free CancellationRating
8.2
1,517 reviews
Search Singapore Airlines flights
United AirlinesPriceFrom $1,024Free CancellationRating
7.4
9,730 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

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