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Cheap flights from Portland to Singapore from $471

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
2:50 pm - 5:15 am
PDX
-
SIN
23h 25m
1 stop
Singapore Airlines Logo
9:00 am - 4:50 pm
SIN
-
PDX
22h 50m
1 stop
$976Singapore Airlines
Sun, Sep 13 - Thu, Sep 24
Singapore Airlines Logo
5:35 pm - 7:40 am
PDX
-
SIN
23h 05m
1 stop
Singapore Airlines Logo
9:15 am - 4:50 pm
SIN
-
PDX
22h 35m
1 stop
$996Singapore Airlines
Wed, Sep 9 - Wed, Sep 23
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
Thu, Sep 17 - Thu, Oct 1
Qatar Airways Logo
5:00 am - 9:15 pm
PDX
-
SIN
49h 15m
2 stops
Qatar Airways Logo
3:15 am - 10:01 pm
SIN
-
PDX
33h 46m
2 stops
$1,009Qatar Airways
Mon, Aug 17 - Mon, Aug 31
Singapore Airlines Logo
6:05 am - 5:35 pm
PDX
-
SIN
20h 30m
1 stop
Singapore Airlines Logo
9:15 am - 8:48 pm
SIN
-
PDX
26h 33m
1 stop
$1,012Singapore Airlines
Tue, Sep 29 - Mon, Oct 5
Multiple Airlines Logo
12:31 pm - 5:15 am
PDX
-
SIN
25h 44m
1 stop
Multiple Airlines Logo
9:15 am - 1:50 pm
SIN
-
PDX
19h 35m
1 stop
$1,019Multiple Airlines
Wed, Oct 21 - Mon, Oct 26
Singapore Airlines Logo
5:35 pm - 7:40 am
PDX
-
SIN
23h 05m
1 stop
Singapore Airlines Logo
9:00 am - 12:22 pm
SIN
-
PDX
18h 22m
1 stop
$1,021Singapore Airlines
Thu, Oct 1 - Sat, Oct 10
Singapore Airlines Logo
5:35 pm - 7:40 am
PDX
-
SIN
23h 05m
1 stop
Singapore Airlines Logo
9:15 am - 4:45 pm
SIN
-
PDX
22h 30m
1 stop
$1,045Singapore Airlines
Thu, Oct 1 - Sat, Oct 10
Qatar Airways Logo
8:19 am - 9:15 pm
PDX
-
SIN
45h 56m
2 stops
Qatar Airways Logo
3:15 am - 4:49 pm
SIN
-
PDX
28h 34m
2 stops
$1,054Qatar Airways
Mon, Aug 17 - Mon, Aug 31
Singapore Airlines Logo
5:10 am - 5:35 pm
PDX
-
SIN
21h 25m
1 stop
Singapore Airlines Logo
9:00 am - 2:27 pm
SIN
-
PDX
20h 27m
1 stop
$1,071Singapore Airlines
Thu, Sep 3 - Thu, Sep 10

Singapore Airlines flights from Portland to Singapore

Our best Singapore Airlines deals on Portland to Singapore flight tickets
Singapore Airlines
Sep 13
PDX2:50 pmPortland
23h 25m
1 stop
SIN5:15 amSingapore Changi
Sep 24
SIN9:00 amSingapore Changi
22h 50m
1 stop
PDX4:50 pmPortland
$976
Singapore Airlines
Sep 9
PDX5:35 pmPortland
23h 05m
1 stop
SIN7:40 amSingapore Changi
Sep 23
SIN9:15 amSingapore Changi
22h 35m
1 stop
PDX4:50 pmPortland
$996
Singapore Airlines
Sep 29
PDX6:05 amPortland
20h 30m
1 stop
SIN5:35 pmSingapore Changi
Oct 5
SIN9:15 amSingapore Changi
26h 33m
1 stop
PDX8:48 pmPortland
$1,012

Cathay Pacific flights from Portland to Singapore

Our best Cathay Pacific deals on Portland to Singapore flight tickets
Cathay Pacific
Sep 29
PDX7:00 amPortland
26h 45m
2 stops
SIN12:45 amSingapore Changi
Oct 5
SIN7:20 amSingapore Changi
24h 07m
2 stops
PDX4:27 pmPortland
$1,183
Cathay Pacific
May 17
PDX2:51 pmPortland
42h 54m
2 stops
SIN12:45 amSingapore Changi
May 24
SIN1:45 amSingapore Changi
46h 44m
2 stops
PDX9:29 amPortland
$1,647

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 5, 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

Sun 9/13

2:50 pm-5:15 am

1 stop23h 25m

Singapore Changi

Thu 9/24

9:00 am-4:50 pm

1 stop22h 50m

$976

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 9/9

5:35 pm-7:40 am

1 stop23h 05m

Singapore Changi

Wed 9/23

9:15 am-4:50 pm

1 stop22h 35m

$996

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 9/17

11:45 am-8:50 am

2 stops30h 05m

Singapore Changi

Thu 10/1

3:15 am-10:01 pm

2 stops33h 46m

$1,007

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 8/17

5:00 am-9:15 pm

2 stops49h 15m

Singapore Changi

Mon 8/31

3:15 am-10:01 pm

2 stops33h 46m

$1,009

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 9/29

6:05 am-5:35 pm

1 stop20h 30m

Singapore Changi

Mon 10/5

9:15 am-8:48 pm

1 stop26h 33m

$1,012

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 10/21

12:31 pm-5:15 am

1 stop25h 44m

Singapore Changi

Mon 10/26

9:15 am-1:50 pm

1 stop19h 35m

$1,019
Quickest round-trip

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 10/1

5:35 pm-7:40 am

1 stop23h 05m

Singapore Changi

Sat 10/10

9:00 am-12:22 pm

1 stop18h 22m

$1,021

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 10/1

5:35 pm-7:40 am

1 stop23h 05m

Singapore Changi

Sat 10/10

9:15 am-4:45 pm

1 stop22h 30m

$1,045

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 8/17

8:19 am-9:15 pm

2 stops45h 56m

Singapore Changi

Mon 8/31

3:15 am-4:49 pm

2 stops28h 34m

$1,054

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-2:27 pm

1 stop20h 27m

$1,071

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 $1,050 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 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

21h 30m

Direct flights

None
The fastest flight from Portland to Singapore takes 21h 30m
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
10,996 reviews
Search Air Canada flights
Korean AirPriceFrom $786Free CancellationRating
8.4
1,216 reviews
Search Korean Air flights
Singapore AirlinesPriceFrom $837Free CancellationRating
8.2
1,506 reviews
Search Singapore Airlines flights
United AirlinesPriceFrom $1,024Free CancellationRating
7.4
9,682 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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