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Cheap flights from Portland to Singapore from $421

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 8/6. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Portland to Singapore

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
7:45 pm - 5:15 am
PDX
-
SIN
18h 30m
1 stop
Air Canada Logo
7:00 am - 9:31 am
SIN
-
PDX
17h 31m
1 stop
$918Air Canada
Thu, Oct 8 - Thu, Oct 15
Air Canada Logo
3:15 pm - 7:00 am
PDX
-
SIN
23h 45m
1 stop
Air Canada Logo
8:40 am - 9:26 am
SIN
-
PDX
16h 46m
1 stop
$918Air Canada
Tue, Nov 3 - Tue, Nov 17
Air Canada Logo
7:00 am - 7:00 am
PDX
-
SIN
32h 00m
1 stop
Air Canada Logo
8:40 am - 2:41 pm
SIN
-
PDX
22h 01m
1 stop
$918Air Canada
Thu, Jan 21 - Thu, Feb 11
Qatar Airways Logo
12:01 pm - 8:45 am
PDX
-
SIN
28h 44m
2 stops
Qatar Airways Logo
3:15 am - 3:25 pm
SIN
-
PDX
28h 10m
2 stops
$993Qatar Airways
Tue, Nov 3 - Mon, Nov 16
Qatar Airways Logo
10:45 am - 8:45 am
PDX
-
SIN
30h 00m
2 stops
Qatar Airways Logo
8:15 pm - 4:50 pm
SIN
-
PDX
36h 35m
2 stops
$993Qatar Airways
Tue, Nov 3 - Tue, Nov 17
Multiple Airlines Logo
6:53 pm - 2:25 am
PDX
-
SIN
40h 32m
2 stops
Multiple Airlines Logo
6:25 pm - 4:36 pm
SIN
-
PDX
37h 11m
2 stops
$996Multiple Airlines
Fri, Sep 4 - Tue, Sep 15
Singapore Airlines Logo
7:18 am - 7:10 pm
PDX
-
SIN
20h 52m
1 stop
Singapore Airlines Logo
9:15 am - 4:44 pm
SIN
-
PDX
22h 29m
1 stop
$1,088Singapore Airlines
Mon, Oct 12 - Mon, Oct 26
Singapore Airlines Logo
9:50 pm - 7:05 pm
PDX
-
SIN
29h 15m
1 stop
Singapore Airlines Logo
9:15 am - 1:50 pm
SIN
-
PDX
20h 35m
1 stop
$1,089Singapore Airlines
Mon, Jan 18 - Tue, Feb 2
United Airlines Logo
7:00 am - 6:35 pm
PDX
-
SIN
20h 35m
1 stop
United Airlines Logo
8:35 pm - 10:11 am
SIN
-
PDX
28h 36m
1 stop
$1,134United Airlines
Thu, Aug 27 - Thu, Sep 10
United Airlines Logo
9:00 am - 6:15 am
PDX
-
SIN
30h 15m
1 stop
United Airlines Logo
8:35 pm - 10:11 am
SIN
-
PDX
28h 36m
1 stop
$1,146United Airlines
Fri, Sep 4 - Tue, Sep 15

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Qatar Airways flights from Portland to Singapore

Our best Qatar Airways deals on Portland to Singapore flight tickets
Qatar Airways
Jan 21
PDX7:10 amPortland
33h 35m
2 stops
SIN8:45 amSingapore Changi
Feb 10
SIN3:15 amSingapore Changi
33h 58m
2 stops
PDX9:13 pmPortland
$1,012
Qatar Airways
Aug 27
PDX11:48 amPortland
36h 57m
2 stops
SIN3:45 pmSingapore Changi
Sep 9
SIN3:15 amSingapore Changi
31h 35m
2 stops
PDX7:50 pmPortland
$1,020
Qatar Airways
Nov 1
PDX8:05 amPortland
38h 50m
2 stops
SIN2:55 pmSingapore Changi
Nov 11
SIN3:15 amSingapore Changi
35h 45m
2 stops
PDX11:00 pmPortland
$1,022

Alaska Airlines flights from Portland to Singapore

Our best Alaska Airlines deals on Portland to Singapore flight tickets
Alaska Airlines
Oct 28
PDX9:31 amPortland
32h 14m
2 stops
SIN8:45 amSingapore Changi
Jan 23
SIN3:15 amSingapore Changi
33h 33m
2 stops
PDX8:48 pmPortland
$1,023
Alaska Airlines
Jan 16
PDX10:30 amPortland
30h 15m
2 stops
SIN8:45 amSingapore Changi
Jan 30
SIN3:15 amSingapore Changi
33h 33m
2 stops
PDX8:48 pmPortland
$1,033
Alaska Airlines
Jan 8
PDX9:40 amPortland
31h 05m
2 stops
SIN8:45 amSingapore Changi
Jan 15
SIN10:15 amSingapore Changi
50h 33m
2 stops
PDX8:48 pmPortland
$1,036

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 July 30, 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

Thu 10/8

7:45 pm-5:15 am

1 stop18h 30m

Singapore Changi

Thu 10/15

7:00 am-9:31 am

1 stop17h 31m

$918

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 11/3

3:15 pm-7:00 am

1 stop23h 45m

Singapore Changi

Tue 11/17

8:40 am-9:26 am

1 stop16h 46m

$918

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 1/21

7:00 am-7:00 am

1 stop32h 00m

Singapore Changi

Thu 2/11

8:40 am-2:41 pm

1 stop22h 01m

$918

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 11/3

12:01 pm-8:45 am

2 stops28h 44m

Singapore Changi

Mon 11/16

3:15 am-3:25 pm

2 stops28h 10m

$993

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 11/3

10:45 am-8:45 am

2 stops30h 00m

Singapore Changi

Tue 11/17

8:15 pm-4:50 pm

2 stops36h 35m

$993

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Fri 9/4

6:53 pm-2:25 am

2 stops40h 32m

Singapore Changi

Tue 9/15

6:25 pm-4:36 pm

2 stops37h 11m

$996

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 10/12

7:18 am-7:10 pm

1 stop20h 52m

Singapore Changi

Mon 10/26

9:15 am-4:44 pm

1 stop22h 29m

$1,088

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 1/18

9:50 pm-7:05 pm

1 stop29h 15m

Singapore Changi

Tue 2/2

9:15 am-1:50 pm

1 stop20h 35m

$1,089

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 8/27

7:00 am-6:35 pm

1 stop20h 35m

Singapore Changi

Thu 9/10

8:35 pm-10:11 am

1 stop28h 36m

$1,134

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Fri 9/4

9:00 am-6:15 am

1 stop30h 15m

Singapore Changi

Tue 9/15

8:35 pm-10:11 am

1 stop28h 36m

$1,146

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 typical price of a round-trip flight between Portland and Singapore?

Prices are currently typical for flights on this route.

Typical prices usually range from $846 to $1,201.
The lowest price recently found on this route was $918.

What is the cheapest month to fly to Singapore?

The month of January is, on average, the cheapest month to fly to Singapore from Portland, with most prices found around $891. If you aren’t able to travel to Singapore during the month of January, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $986.

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 $1,099 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 $874 on momondo.

Can stopping save me money on Portland to Singapore flights?

You could potentially save up to 23% on your flight if you consider stops on a Portland to Singapore flight.

How have Portland to Singapore flight prices changed over time?

When to book flights from Portland to Singapore

Are you open to changing your travel dates? Check out the ideal times to fly from Portland to Singapore according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Portland to Singapore (PDX to SIN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland to Singapore

Fastest flight time

23h 04m

Direct flights

None
The fastest flight from Portland to Singapore takes 23h 04m
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

  • How far is Portland to Singapore Changi by plane?

    The straight-line distance from Portland to Singapore Changi is 8130.5 mi. In terms of flight time, this usually takes a little over 23h 04m.

  • When did momondo last update prices for flights from Portland Airport to Singapore Changi Airport?

    Prices for flights from Portland Airport to Singapore Changi Airport were last updated today.

  • How many operators does momondo search for flights from Portland Airport to Singapore Changi Airport?

  • How old do you have to be to fly from Portland Airport to Singapore Changi Airport?

    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 Changi Airport.

  • What documentation or ID do you need to fly to Singapore Changi Airport?

    The travel and health documents required for your trip to Singapore Changi Airport 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 Changi Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Portland to Singapore?

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 $719Free CancellationRating
7.1
11,408 reviews
Search Air Canada flights
Singapore AirlinesPriceFrom $789Free CancellationRating
8.2
1,584 reviews
Search Singapore Airlines flights
United AirlinesPriceFrom $1,024Free CancellationRating
7.4
10,047 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Portland to Singapore?

Finding the right flight to Singapore from Portland is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Singapore quick and easy, saving you time and money.

Can I find flights from Portland to Singapore with flexible booking policies on momondo?

Flights from Portland to Singapore with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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?

If you are simply researching potential flights to Singapore, momondo offers a useful price alert feature which will track prices for flights to Singapore from Portland and alert you when they change.

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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Fly your favorite airline to Singapore

Airlines are sorted and displayed according to clicks in the past 7 days on momondo
Air Canada
Singapore Airlines
United Airlines