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Cheap flights from Portland to Singapore from $457

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 1/7. 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.
Air Canada Logo
3:15 pm - 7:00 am
PDX
-
SIN
24h 45m1 stop
Air Canada Logo
11:55 pm - 2:40 pm
SIN
-
PDX
29h 45m2 stops
$808Air Canada
Thu, Mar 19 - Mon, Apr 20
Air Canada Logo
7:05 pm - 12:55 am
PDX
-
SIN
37h 50m2 stops
Air Canada Logo
8:50 am - 2:40 pm
SIN
-
PDX
21h 50m1 stop
$860Air Canada
Sun, Mar 1 - Sat, Mar 7
Air Canada Logo
7:05 pm - 12:55 am
PDX
-
SIN
37h 50m2 stops
Air Canada Logo
9:00 pm - 5:30 pm
SIN
-
PDX
36h 30m2 stops
$861Air Canada
Sun, Mar 1 - Sat, Mar 7
Air Canada Logo
9:50 am - 7:00 am
PDX
-
SIN
29h 10m1 stop
Air Canada Logo
8:50 am - 2:40 pm
SIN
-
PDX
20h 50m1 stop
$872Air Canada
Fri, Feb 20 - Fri, Mar 13
Air Canada Logo
3:15 pm - 11:15 am
PDX
-
SIN
28h 00m2 stops
Air Canada Logo
8:50 am - 6:30 pm
SIN
-
PDX
24h 40m1 stop
$874Air Canada
Fri, Feb 20 - Fri, Mar 13
Air Canada Logo
3:15 pm - 11:15 am
PDX
-
SIN
28h 00m2 stops
Air Canada Logo
8:50 am - 12:44 am
SIN
-
PDX
30h 54m2 stops
$894Air Canada
Fri, Feb 20 - Fri, Mar 13
Multiple Airlines Logo
9:50 am - 11:55 am
PDX
-
SIN
34h 05m2 stops
Multiple Airlines Logo
8:50 am - 2:40 pm
SIN
-
PDX
21h 50m1 stop
$895Multiple Airlines
Fri, Jan 30 - Fri, Feb 6
Multiple Airlines Logo
9:50 am - 11:55 am
PDX
-
SIN
34h 05m2 stops
Multiple Airlines Logo
9:00 pm - 6:30 pm
SIN
-
PDX
37h 30m2 stops
$896Multiple Airlines
Fri, Jan 30 - Fri, Feb 6
Multiple Airlines Logo
3:15 pm - 11:15 am
PDX
-
SIN
28h 00m2 stops
Multiple Airlines Logo
7:20 am - 2:40 pm
SIN
-
PDX
23h 20m2 stops
$912Multiple Airlines
Mon, Feb 2 - Mon, Feb 16
Air Canada Logo
9:50 am - 11:15 am
PDX
-
SIN
33h 25m2 stops
Air Canada Logo
6:35 am - 9:15 am
SIN
-
PDX
42h 40m2 stops
$927Air Canada
Tue, Feb 3 - Mon, Feb 16

Singapore Airlines flights from Portland to Singapore

Our best Singapore Airlines deals on Portland to Singapore flight tickets
Singapore Airlines
Apr 9
PDX7:00 amPortland
21h 10m
1 stop
SIN7:10 pmSingapore Changi
Apr 29
SIN9:15 amSingapore Changi
26h 23m
1 stop
PDX8:38 pmPortland
$924
Find similar
Singapore Airlines
Mar 25
PDX7:00 amPortland
21h 05m
1 stop
SIN7:05 pmSingapore Changi
Apr 4
SIN9:15 amSingapore Changi
22h 13m
1 stop
PDX4:28 pmPortland
$966
Find similar

United Airlines flights from Portland to Singapore

Our best United Airlines deals on Portland to Singapore flight tickets
United Airlines
Apr 8
PDX1:39 pmPortland
26h 06m
1 stop
SIN6:45 amSingapore Changi
Apr 28
SIN9:00 amSingapore Changi
22h 28m
1 stop
PDX4:28 pmPortland
$1,025
Find similar
United Airlines
Apr 8
PDX12:49 pmPortland
26h 56m
2 stops
SIN6:45 amSingapore Changi
Apr 29
SIN8:40 pmSingapore Changi
19h 14m
1 stop
PDX12:54 amPortland
$1,029
Find similar
United Airlines
Feb 1
PDX7:51 pmPortland
32h 24m
1 stop
SIN8:15 pmSingapore Changi
Feb 16
SIN10:10 amSingapore Changi
18h 28m
1 stop
PDX12:38 pmPortland
$1,031
Find similar

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 December 18, 2025.
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

Thu 3/19

3:15 pm-7:00 am

1 stop24h 45m

Singapore Changi

Mon 4/20

11:55 pm-2:40 pm

2 stops29h 45m

$808

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 3/1

7:05 pm-12:55 am

2 stops37h 50m

Singapore Changi

Sat 3/7

8:50 am-2:40 pm

1 stop21h 50m

$860

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 3/1

7:05 pm-12:55 am

2 stops37h 50m

Singapore Changi

Sat 3/7

9:00 pm-5:30 pm

2 stops36h 30m

$861

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Fri 2/20

9:50 am-7:00 am

1 stop29h 10m

Singapore Changi

Fri 3/13

8:50 am-2:40 pm

1 stop20h 50m

$872

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Fri 2/20

3:15 pm-11:15 am

2 stops28h 00m

Singapore Changi

Fri 3/13

8:50 am-6:30 pm

1 stop24h 40m

$874

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Fri 2/20

3:15 pm-11:15 am

2 stops28h 00m

Singapore Changi

Fri 3/13

8:50 am-12:44 am

2 stops30h 54m

$894

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Fri 1/30

9:50 am-11:55 am

2 stops34h 05m

Singapore Changi

Fri 2/6

8:50 am-2:40 pm

1 stop21h 50m

$895

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Fri 1/30

9:50 am-11:55 am

2 stops34h 05m

Singapore Changi

Fri 2/6

9:00 pm-6:30 pm

2 stops37h 30m

$896

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 2/2

3:15 pm-11:15 am

2 stops28h 00m

Singapore Changi

Mon 2/16

7:20 am-2:40 pm

2 stops23h 20m

$912

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 2/3

9:50 am-11:15 am

2 stops33h 25m

Singapore Changi

Mon 2/16

6:35 am-9:15 am

2 stops42h 40m

$927

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 $749. 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 $875.

What is the cheapest day to depart on your flight to Singapore?

The cheapest day to depart from Portland to Singapore is on a Tuesday when prices can be found for as low as $1,256. The most expensive day to fly to Singapore is Saturday, with ticket prices averaging around $1,673.

What is the cheapest time of day to depart on your flight to Singapore?

At noon is the cheapest time of day to fly from Portland to Singapore when you can find flight prices for as low as $1,121. Flying to Singapore at noon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,334 on average. Flights to Singapore from Portland in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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 $994 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 $798 on momondo.

Can stopping save me money on Portland to Singapore flights?

You could potentially save up to 1% 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 45m

Direct flights

None
The fastest flight from Portland to Singapore takes 20h 45m
There are no direct flights from Portland to Singapore. There are no popular flight routes from Portland to Singapore.
Search flight deals

  • 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
10,534 reviews
Search Air Canada flights
Korean AirPriceFrom $792Free CancellationRating
8.4
1,186 reviews
Search Korean Air flights
DeltaPriceFrom $800Free CancellationRating
7.9
8,007 reviews
Search Delta flights
Singapore AirlinesPriceFrom $837Free CancellationRating
8.1
1,413 reviews
Search Singapore Airlines flights
United AirlinesPriceFrom $868Free CancellationRating
7.4
9,091 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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