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Cheap flights from Portland to Singapore from $327

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 3/11. 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

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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
5:34 pm - 7:50 am
PDX
-
SIN
23h 16m
1 stop
Singapore Airlines Logo
9:00 am - 12:22 pm
SIN
-
PDX
18h 22m
1 stop
$859Singapore Airlines
Tue, Aug 4 - Tue, Sep 8
Singapore Airlines Logo
7:00 am - 7:10 pm
PDX
-
SIN
21h 10m
1 stop
Singapore Airlines Logo
8:45 pm - 9:38 am
SIN
-
PDX
27h 53m
1 stop
$861Singapore Airlines
Wed, Apr 22 - Mon, May 4
Air Canada Logo
3:15 pm - 7:00 am
PDX
-
SIN
24h 45m
1 stop
Air Canada Logo
10:50 pm - 6:30 pm
SIN
-
PDX
34h 40m
2 stops
$871Air Canada
Thu, Mar 19 - Mon, Apr 20
Air Canada Logo
7:45 pm - 5:15 am
PDX
-
SIN
18h 30m
1 stop
Air Canada Logo
7:00 am - 7:05 pm
SIN
-
PDX
27h 05m
1 stop
$880Air Canada
Fri, May 8 - Sun, May 24
Multiple Airlines Logo
1:36 pm - 9:35 am
PDX
-
SIN
28h 59m
2 stops
Multiple Airlines Logo
11:45 pm - 11:04 pm
SIN
-
PDX
38h 19m
2 stops
$885Multiple Airlines
Sun, Mar 8 - Tue, Mar 17
Singapore Airlines Logo
5:34 pm - 7:50 am
PDX
-
SIN
23h 16m
1 stop
Singapore Airlines Logo
8:45 pm - 10:25 am
SIN
-
PDX
28h 40m
1 stop
$905Singapore Airlines
Sat, Aug 15 - Mon, Aug 31
Multiple Airlines Logo
1:36 pm - 9:35 am
PDX
-
SIN
28h 59m
2 stops
Multiple Airlines Logo
12:05 am - 11:04 pm
SIN
-
PDX
37h 59m
2 stops
$906Multiple Airlines
Sun, Mar 8 - Tue, Mar 17
Singapore Airlines Logo
5:34 pm - 7:50 am
PDX
-
SIN
23h 16m
1 stop
Singapore Airlines Logo
8:45 pm - 10:25 am
SIN
-
PDX
28h 40m
1 stop
$922Singapore Airlines
Sat, Aug 15 - Mon, Aug 31
STARLUX Airlines Logo
5:36 pm - 12:40 pm
PDX
-
SIN
28h 04m
2 stops
STARLUX Airlines Logo
2:00 pm - 12:10 am
SIN
-
PDX
25h 10m
2 stops
$923STARLUX Airlines
Tue, Aug 4 - Tue, Sep 8
Asiana Airlines Logo
3:25 pm - 5:15 am
PDX
-
SIN
22h 50m
1 stop
Asiana Airlines Logo
8:10 am - 2:51 pm
SIN
-
PDX
21h 41m
2 stops
$929Asiana Airlines
Tue, Aug 4 - Tue, Sep 8

United Airlines flights from Portland to Singapore

Our best United Airlines deals on Portland to Singapore flight tickets
United Airlines
Apr 13
PDX11:05 amPortland
28h 40m
1 stop
SIN6:45 amSingapore Changi
Apr 16
SIN9:00 amSingapore Changi
20h 31m
1 stop
PDX2:31 pmPortland
$1,055
United Airlines
Apr 13
PDX11:05 amPortland
28h 40m
1 stop
SIN6:45 amSingapore Changi
Apr 16
SIN9:00 amSingapore Changi
23h 45m
2 stops
PDX5:45 pmPortland
$1,059
United Airlines
Mar 11
PDX7:30 amPortland
21h 45m
1 stop
SIN8:15 pmSingapore Changi
Mar 31
SIN8:35 pmSingapore Changi
39h 39m
2 stops
PDX9:14 pmPortland
$1,070

Singapore Airlines flights from Portland to Singapore

Our best Singapore Airlines deals on Portland to Singapore flight tickets
Singapore Airlines
Apr 22
PDX7:00 amPortland
21h 10m
1 stop
SIN7:10 pmSingapore Changi
May 4
SIN8:45 pmSingapore Changi
27h 53m
1 stop
PDX9:38 amPortland
$861
Singapore Airlines
Aug 15
PDX5:34 pmPortland
23h 16m
1 stop
SIN7:50 amSingapore Changi
Aug 31
SIN8:45 pmSingapore Changi
28h 40m
1 stop
PDX10:25 amPortland
$905
Singapore Airlines
Apr 22
PDX7:00 amPortland
21h 10m
1 stop
SIN7:10 pmSingapore Changi
May 1
SIN6:40 pmSingapore Changi
20h 04m
1 stop
PDX11:44 pmPortland
$976

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 February 17, 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

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 8/4

5:34 pm-7:50 am

1 stop23h 16m

Singapore Changi

Tue 9/8

9:00 am-12:22 pm

1 stop18h 22m

$859

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 4/22

7:00 am-7:10 pm

1 stop21h 10m

Singapore Changi

Mon 5/4

8:45 pm-9:38 am

1 stop27h 53m

$861

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 3/19

3:15 pm-7:00 am

1 stop24h 45m

Singapore Changi

Mon 4/20

10:50 pm-6:30 pm

2 stops34h 40m

$871

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Fri 5/8

7:45 pm-5:15 am

1 stop18h 30m

Singapore Changi

Sun 5/24

7:00 am-7:05 pm

1 stop27h 05m

$880

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 3/8

1:36 pm-9:35 am

2 stops28h 59m

Singapore Changi

Tue 3/17

11:45 pm-11:04 pm

2 stops38h 19m

$885

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 8/15

5:34 pm-7:50 am

1 stop23h 16m

Singapore Changi

Mon 8/31

8:45 pm-10:25 am

1 stop28h 40m

$905

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 3/8

1:36 pm-9:35 am

2 stops28h 59m

Singapore Changi

Tue 3/17

12:05 am-11:04 pm

2 stops37h 59m

$906

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 8/15

5:34 pm-7:50 am

1 stop23h 16m

Singapore Changi

Mon 8/31

8:45 pm-10:25 am

1 stop28h 40m

$922

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 8/4

5:36 pm-12:40 pm

2 stops28h 04m

Singapore Changi

Tue 9/8

2:00 pm-12:10 am

2 stops25h 10m

$923

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 8/4

3:25 pm-5:15 am

1 stop22h 50m

Singapore Changi

Tue 9/8

8:10 am-2:51 pm

2 stops21h 41m

$929

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 $837.

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 $778 on momondo.

Can stopping save me money on Portland to Singapore flights?

You could potentially save up to 31% 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

21h 10m

Direct flights

None
The fastest flight from Portland to Singapore takes 21h 10m
There are no direct flights from Portland to Singapore. There are no popular flight routes from Portland to Singapore.
Search flight deals

  • 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 21h 10m.

  • 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 $694Free CancellationRating
7.1
10,727 reviews
Search Air Canada flights
Korean AirPriceFrom $792Free CancellationRating
8.4
1,191 reviews
Search Korean Air flights
DeltaPriceFrom $800Free CancellationRating
7.9
8,206 reviews
Search Delta flights
Singapore AirlinesPriceFrom $837Free CancellationRating
8.2
1,456 reviews
Search Singapore Airlines flights
United AirlinesPriceFrom $870Free CancellationRating
7.4
9,308 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
Korean Air
Delta