Latest deals
Insights
FAQs
Reviews
Price Alerts

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 9/1. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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
9:00 am - 12:22 pm
SIN
-
PDX
18h 22m
1 stop
$897Singapore Airlines
Sat, Oct 10 - Thu, Oct 15
Singapore Airlines Logo
6:07 am - 5:35 pm
PDX
-
SIN
20h 28m
1 stop
Singapore Airlines Logo
9:15 am - 10:33 pm
SIN
-
PDX
28h 18m
1 stop
$917Singapore Airlines
Sun, Oct 4 - Mon, Oct 12
Singapore Airlines Logo
2:30 pm - 7:40 am
PDX
-
SIN
26h 10m
1 stop
Singapore Airlines Logo
9:15 am - 1:50 pm
SIN
-
PDX
19h 35m
1 stop
$940Singapore Airlines
Mon, Oct 19 - Mon, Oct 26
Singapore Airlines Logo
6:05 am - 5:35 pm
PDX
-
SIN
20h 30m
1 stop
Singapore Airlines Logo
9:00 am - 12:22 pm
SIN
-
PDX
18h 22m
1 stop
$942Singapore Airlines
Fri, Sep 18 - Sat, Oct 3
Singapore Airlines Logo
7:00 am - 12:55 am
PDX
-
SIN
26h 55m
2 stops
Singapore Airlines Logo
9:15 am - 1:50 pm
SIN
-
PDX
19h 35m
1 stop
$952Singapore Airlines
Mon, Oct 19 - 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
$965Singapore 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 - 4:50 pm
SIN
-
PDX
22h 35m
1 stop
$985Singapore Airlines
Thu, Oct 1 - Sat, Oct 10
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
$1,011Singapore Airlines
Thu, Oct 1 - Sat, Oct 10
Qatar Airways Logo
9:40 am - 3:45 pm
PDX
-
SIN
39h 05m
2 stops
Qatar Airways Logo
3:15 am - 12:10 am
SIN
-
PDX
35h 55m
2 stops
$1,047Qatar Airways
Sun, Oct 4 - Sun, Oct 11
Qatar Airways Logo
11:45 am - 9:15 pm
PDX
-
SIN
42h 30m
2 stops
Qatar Airways Logo
7:40 pm - 4:50 pm
SIN
-
PDX
36h 10m
2 stops
$1,049Qatar Airways
Thu, Sep 10 - Thu, Sep 24

Singapore Airlines flights from Portland to Singapore

Our best Singapore Airlines deals on Portland to Singapore flight tickets
Singapore Airlines
Oct 10
PDX6:07 amPortland
20h 28m
1 stop
SIN5:35 pmSingapore Changi
Oct 15
SIN9:00 amSingapore Changi
18h 22m
1 stop
PDX12:22 pmPortland
$897
Singapore Airlines
Oct 4
PDX6:07 amPortland
20h 28m
1 stop
SIN5:35 pmSingapore Changi
Oct 12
SIN9:15 amSingapore Changi
28h 18m
1 stop
PDX10:33 pmPortland
$917
Singapore Airlines
Oct 19
PDX2:30 pmPortland
26h 10m
1 stop
SIN7:40 amSingapore Changi
Oct 26
SIN9:15 amSingapore Changi
19h 35m
1 stop
PDX1:50 pmPortland
$940

Qatar Airways flights from Portland to Singapore

Our best Qatar Airways deals on Portland to Singapore flight tickets
Qatar Airways
Apr 29
PDX6:00 amPortland
36h 20m
2 stops
SIN9:20 amSingapore Changi
May 5
SIN1:30 amSingapore Changi
32h 06m
2 stops
PDX6:36 pmPortland
$985
Qatar Airways
Oct 4
PDX9:40 amPortland
39h 05m
2 stops
SIN3:45 pmSingapore Changi
Oct 11
SIN3:15 amSingapore Changi
35h 55m
2 stops
PDX12:10 amPortland
$1,047
Qatar Airways
Sep 10
PDX11:45 amPortland
42h 30m
2 stops
SIN9:15 pmSingapore Changi
Sep 24
SIN7:40 pmSingapore Changi
36h 10m
2 stops
PDX4:50 pmPortland
$1,049

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 April 24, 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
Quickest round-trip

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 10/10

6:07 am-5:35 pm

1 stop20h 28m

Singapore Changi

Thu 10/15

9:00 am-12:22 pm

1 stop18h 22m

$897

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 10/4

6:07 am-5:35 pm

1 stop20h 28m

Singapore Changi

Mon 10/12

9:15 am-10:33 pm

1 stop28h 18m

$917

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 10/19

2:30 pm-7:40 am

1 stop26h 10m

Singapore Changi

Mon 10/26

9:15 am-1:50 pm

1 stop19h 35m

$940

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Fri 9/18

6:05 am-5:35 pm

1 stop20h 30m

Singapore Changi

Sat 10/3

9:00 am-12:22 pm

1 stop18h 22m

$942

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 10/19

7:00 am-12:55 am

2 stops26h 55m

Singapore Changi

Mon 10/26

9:15 am-1:50 pm

1 stop19h 35m

$952

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

$965

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-4:50 pm

1 stop22h 35m

$985

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 10/1

2:50 pm-7:40 am

1 stop25h 50m

Singapore Changi

Sat 10/10

9:00 am-12:22 pm

1 stop18h 22m

$1,011

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 10/4

9:40 am-3:45 pm

2 stops39h 05m

Singapore Changi

Sun 10/11

3:15 am-12:10 am

2 stops35h 55m

$1,047

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 9/10

11:45 am-9:15 pm

2 stops42h 30m

Singapore Changi

Thu 9/24

7:40 pm-4:50 pm

2 stops36h 10m

$1,049

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 May is, on average, the cheapest month to fly to Singapore from Portland, with most prices found around $858. If you aren’t able to travel to Singapore during the month of May, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $874.

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 $1,042 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 16m

Direct flights

None
The fastest flight from Portland to Singapore takes 20h 16m
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
10,961 reviews
Search Air Canada flights
Korean AirPriceFrom $786Free CancellationRating
8.4
1,212 reviews
Search Korean Air flights
Singapore AirlinesPriceFrom $837Free CancellationRating
8.2
1,502 reviews
Search Singapore Airlines flights
United AirlinesPriceFrom $1,012Free CancellationRating
7.4
9,643 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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sun 5/24
Sun 5/31
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Singapore

Popular cities in Singapore

Popular flights according to clicks in the last 7 days on momondo
Flights to Singaporefrom $650