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Cheap flights from Portland to Singapore Changi

Compare Portland to Singapore Changi flight deals

Find the cheapest month or even day of the year to fly to Singapore Changi

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Flight deals from Portland Airport to Singapore Changi Airport

Looking for a cheap last-minute deal or the best round-trip flight from Portland Airport to Singapore Changi Airport? If you want to travel next month, round-trip fares start from $943. Find the lowest prices on one-way and round-trip tickets right here.
Singapore.$859 per passenger.Departing Thu, May 14, returning Thu, May 28.Round-trip flight with Alaska Airlines and Singapore Airlines.Outbound indirect flight with Alaska Airlines, departing from Portland on Thu, May 14, arriving in Singapore Changi.Inbound indirect flight with Singapore Airlines, departing from Singapore Changi on Thu, May 28, arriving in Portland.Price includes taxes and charges.From $859, select.
Singapore.$884 per passenger.Departing Thu, Apr 30, returning Thu, May 14.Round-trip flight with Alaska Airlines and Singapore Airlines.Outbound indirect flight with Alaska Airlines, departing from Portland on Thu, Apr 30, arriving in Singapore Changi.Inbound indirect flight with Singapore Airlines, departing from Singapore Changi on Thu, May 14, arriving in Portland.Price includes taxes and charges.From $884, select.
Singapore.$943 per passenger.Departing Mon, Mar 16, returning Mon, Mar 23.Round-trip flight with Hawaiian Airlines and Asiana Airlines.Outbound indirect flight with Hawaiian Airlines, departing from Portland on Mon, Mar 16, arriving in Singapore Changi.Inbound indirect flight with Asiana Airlines, departing from Singapore Changi on Mon, Mar 23, arriving in Portland.Price includes taxes and charges.From $943, select.
Singapore.$944 per passenger.Departing Tue, Apr 14, returning Thu, Apr 23.Round-trip flight with Alaska Airlines and Singapore Airlines.Outbound indirect flight with Alaska Airlines, departing from Portland on Tue, Apr 14, arriving in Singapore Changi.Inbound indirect flight with Singapore Airlines, departing from Singapore Changi on Thu, Apr 23, arriving in Portland.Price includes taxes and charges.From $944, select.
Singapore.$1,005 per passenger.Departing Sun, Aug 16, returning Sun, Sep 20.Round-trip flight with STARLUX Airlines.Outbound indirect flight with STARLUX Airlines, departing from Portland on Sun, Aug 16, arriving in Singapore Changi.Inbound indirect flight with STARLUX Airlines, departing from Singapore Changi on Sun, Sep 20, arriving in Portland.Price includes taxes and charges.From $1,005, select.
Singapore.$1,009 per passenger.Departing Mon, Feb 9, returning Mon, Feb 23.Round-trip flight with United.Outbound indirect flight with United, departing from Portland on Mon, Feb 9, arriving in Singapore Changi.Inbound indirect flight with United, departing from Singapore Changi on Mon, Feb 23, arriving in Portland.Price includes taxes and charges.From $1,009, select.
Singapore.$1,054 per passenger.Departing Sun, Mar 29, returning Thu, Apr 2.Round-trip flight with Frontier Airlines and Xiamen Airlines.Outbound indirect flight with Frontier Airlines, departing from Portland on Sun, Mar 29, arriving in Singapore Changi.Inbound indirect flight with Xiamen Airlines, departing from Singapore Changi on Thu, Apr 2, arriving in Portland.Price includes taxes and charges.From $1,054, select.
Singapore.$1,132 per passenger.Departing Fri, Jul 17, returning Sun, Jul 26.Round-trip flight with Alaska Airlines and Cebu Pacific.Outbound indirect flight with Alaska Airlines, departing from Portland on Fri, Jul 17, arriving in Singapore Changi.Inbound indirect flight with Cebu Pacific, departing from Singapore Changi on Sun, Jul 26, arriving in Portland.Price includes taxes and charges.From $1,132, select.
Singapore.$1,158 per passenger.Departing Sun, Jun 21, returning Tue, Jun 30.Round-trip flight with United.Outbound indirect flight with United, departing from Portland on Sun, Jun 21, arriving in Singapore Changi.Inbound indirect flight with United, departing from Singapore Changi on Tue, Jun 30, arriving in Portland.Price includes taxes and charges.From $1,158, select.
Singapore.$1,306 per passenger.Departing Fri, Apr 17, returning Fri, Jul 17.Round-trip flight with Delta.Outbound indirect flight with Delta, departing from Portland on Fri, Apr 17, arriving in Singapore Changi.Inbound indirect flight with Delta, departing from Singapore Changi on Fri, Jul 17, arriving in Portland.Price includes taxes and charges.From $1,306, select.

Find the cheapest month to fly from Portland to Singapore Changi

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Portland to Singapore Changi flights are currently cheapest in May.
Feb
from $1,009
Mar
from $943
Apr
from $944
May
from $859
Jun
from $1,158
Jul
from $1,132
Aug
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Sep
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Oct
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Nov
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Dec
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Jan
from $1,488

Portland to Singapore Changi: Alternative routes

Compare routes from Portland to Singapore below. You may find an airport to fly into that's cheaper, faster, or easier than Singapore Changi.

Seletar

14km from central Singapore
Closest
Search flights

Singapore Changi

18km from central Singapore
Cheapest
from $859
Search flights

Portland to Singapore: Flight information

The things to know before you go.
Cheapest flight found$859
Cheapest month to flyMay

Check out these Singapore Changi hotels

Ready to plan your stay? Other travelers rate these Singapore Changi hotels for cleanliness, service, and location.
Dorsett Changi City Singapore, Newly Renovated
4.57 km from Singapore Changi
$171
Per night
Crowne Plaza Changi Airport by IHG
1.10 km from Singapore Changi
$381
Per night
Aerotel Singapore - Transit Hotel in Terminal 1
0.33 km from Singapore Changi
$327
Per night
Dorsett Changi City Singapore, Newly Renovated
4.57 km from Singapore Changi
$171
Per night
Crowne Plaza Changi Airport by IHG
1.10 km from Singapore Changi
$381
Per night
Aerotel Singapore - Transit Hotel in Terminal 1
0.33 km from Singapore Changi
$327
Per night
Explore top-rated hotels

Finding cheap flights from Portland to Singapore Changi: Frequently asked questions

The best price we found for a round-trip flight from Portland to Singapore Changi is $859. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Portland to Singapore Changi. But we found flights with one or more stops from $859.
There are no flights flying from Portland to Singapore Changi, as of February 2026.
The cheapest month to fly from Portland to Singapore Changi is usually May.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Portland Airport to Singapore Changi Airport on Thursday, May 14, 2026.
No airlines currently offer direct flights between Portland Airport and Singapore Changi Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Singapore Changi but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Singapore is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Alaska Airlines offers the cheapest flight tickets to Singapore Changi.

Traveling from Portland International Airport (PDX) to Changi International Airport (SIN): what you need to know

  • Singapore is 15 hours ahead of Portland and observes the UTC+8 timezone.

  • For a smooth journey, arrive at the airport two hours ahead of international flights and one hour before domestic departures. This will give you enough time to catch your PDX to SIN flight.

  • During popular months such as July, you'll want to get to the airport well in advance. Arrive two hours before a domestic departure and four hours ahead for an international flight whenever you're traveling during a peak period in general.

  • Consider adding a stopover when booking your ticket from Portland International Airport to Changi International Airport. Simply deselect 'Direct flights only' to break up your trip, or visit a new city along the way. Check out these options between PDX and SIN:

    • San Francisco International Airport

    • Los Angeles International Airport

    • Vancouver International Airport

How to find the cheapest flights from Portland International Airport (PDX) to Changi International Airport (SIN)

  • At the moment, $443 is the lowest price we've found for a one-way Portland International Airport to Changi International Airport flight. The best price for a return ticket is $859. Keep in mind that fares may change due to demand at the time of booking.

  • To find cheap tickets from PDX to SIN, book ahead. Airlines typically offer their best fares when flights are first made available.

  • If you can be flexible with your trip dates, try using the 'Whole month' tool. It'll find the lowest price across the month when looking for a flight from Portland International Airport to Changi International Airport.

  • Spend less time searching for cheap flights from PDX to SIN by creating a Price Alert. We'll send you an email or push notification on the app when fares go down.

  • Tailor your trip with filters. Pick your ideal arrival and departure times, total journey duration and airlines. You can also sort your results by 'Cheapest,' 'Fastest' or 'Best' flights from Portland International Airport to Changi International Airport.

Handy information about Portland International Airport (PDX)

  • You'll find PDX at 7000 NE Airport Way.

  • 83.65% of flights leaving Portland International Airport touch down at their destination on schedule. Given its strong performance rating, delays are unlikely when taking off from PDX.

  • Central Portland to Portland International Airport is around 19 kilometers. Depending on traffic, it'll take you about 20 minutes to get there if you're driving, catching a cab or ride-sharing.

  • Planning to catch public transport? Expect a trip time of around 45 minutes.

  • Need a convenient hotel close to PDX? If you've booked an early flight from Portland International Airport to Changi International Airport, these accommodation options will have you sleeping moments from your departure lounge:

Arriving at Changi International Airport (SIN)

Getting from Changi International Airport (SIN) to central Singapore

  • From Changi International Airport, Singapore is approximately 21 kilometers away. It takes around 20 minutes to drive to the center.

  • If you're traveling by public transport, expect a journey of around 1 hour.

When to fly to Changi International Airport (SIN)

  • April is the busiest month for flights from Portland International Airport to Changi International Airport. For smaller crowds, go to Singapore in February.

  • When booking your flight from Portland International Airport to Changi International Airport, consider the kind of weather you enjoy. May is the warmest month in Singapore, with temperatures ranging from 25ºC (77ºF) to 31ºC (88ºF).

  • Look for cheap tickets from PDX to SIN in January if you'd rather travel during cooler conditions. Temperatures are at their lowest around then, ranging between 24ºC (75ºF) and 30ºC (86ºF) on average.

More travel options

Plan the rest of your trip from Portland to Singapore

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.