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$413+ Cheap flights from Portland (PDX) to Singapore

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/5. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SIN
Jul 21 — Jul 281
Tue 7/21
Tue 7/28
1 adult, Economy
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Cheap flight deals from Portland to Singapore

Cheapest flights from Portland to Singapore
Explore the most affordable flight options available from Portland to Singapore. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 21, 2026.

This United Airlines deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1711:15 am
PDX
-
SIN
1 stop28h 00m
United Airlines
Tue 9/18:35 pm
SIN
-
PDX
1 stop28h 36m
United Airlines
Deal found 6/18$891
This United Airlines deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1710:50 am
PDX
-
SIN
2 stops28h 25m
United Airlines
Wed 8/198:35 pm
SIN
-
PDX
2 stops31h 39m
United Airlines
Deal found 6/19$895
This United Airlines deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/167:15 pm
PDX
-
SIN
1 stop32h 20m
United Airlines
Thu 8/208:35 pm
SIN
-
PDX
1 stop28h 36m
United Airlines
Deal found 6/19$897
This United Airlines deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1611:15 am
PDX
-
SIN
1 stop40h 20m
United Airlines
Wed 8/198:35 pm
SIN
-
PDX
2 stops31h 39m
United Airlines
Deal found 6/19$901
This United Airlines deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/175:30 am
PDX
-
SIN
1 stop22h 45m
United Airlines
Tue 1/1210:45 am
SIN
-
PDX
2 stops30h 09m
United Airlines
Deal found 6/19$902
This United Airlines deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/163:36 pm
PDX
-
SIN
1 stop36h 39m
United Airlines
Wed 1/1310:45 am
SIN
-
PDX
2 stops30h 09m
United Airlines
Deal found 6/19$907
This United Airlines deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/165:30 am
PDX
-
SIN
2 stops27h 25m
United Airlines
Tue 1/1210:45 am
SIN
-
PDX
2 stops30h 09m
United Airlines
Deal found 6/19$914
This FlightHub deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/117:00 am
PDX
-
SIN
1 stop32h 00m
Air Canada
Tue 12/88:50 am
SIN
-
PDX
1 stop16h 36m
Air Canada
Deal found 6/20$918
This United Airlines deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/157:00 am
PDX
-
SIN
1 stop20h 35m
United Airlines
Mon 8/318:45 am
SIN
-
PDX
1 stop27h 14m
United Airlines
Deal found 6/19$925
This United Airlines deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/155:00 am
PDX
-
SIN
2 stops34h 15m
United Airlines
Tue 8/188:35 pm
SIN
-
PDX
1 stop28h 36m
United Airlines
Deal found 6/19$929
This United Airlines deal was found by Cheapflights users on 6/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/211:16 am
PDX
-
SIN
1 stop40h 19m
United Airlines
Sat 8/158:35 pm
SIN
-
PDX
1 stop28h 36m
United Airlines
Deal found 6/20$931

Find flight deals from Portland to Singapore

Keep the following information in mind while searching for Portland to Singapore flight deals. Data was last updated June 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$891
(United Airlines)

One-way from

$413
(United Airlines)

Popular in

December

Cheapest in

January

Average price

$1,295
Provider with most accurate pricing for Portland-Singapore Changi flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Singapore Changi flights.
Search Deals
From Portland to Singapore
Search Deals
One-way flight from Portland to Singapore
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($125 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($62 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated June 21, 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

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 8/17

1:03 pm-6:15 am

1 stop26h 12m

Singapore Changi

Tue 9/1

8:35 pm-1:14 pm

2 stops31h 39m

$895
Quickest round-trip

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 8/15

7:00 am-6:35 pm

1 stop20h 35m

Singapore Changi

Mon 8/31

8:45 am-8:59 pm

1 stop27h 14m

$925

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 7/19

11:16 am-6:35 pm

1 stop40h 19m

Singapore Changi

Sun 7/26

8:45 am-12:50 am

1 stop31h 05m

$937

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 11/11

7:10 am-5:00 am

2 stops29h 50m

Singapore Changi

Fri 12/11

10:30 pm-11:52 pm

2 stops41h 22m

$1,004

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 8/15

7:05 am-11:55 pm

2 stops25h 50m

Singapore Changi

Sun 8/30

1:25 am-5:14 pm

2 stops30h 49m

$1,004

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 11/11

7:10 am-5:00 am

2 stops29h 50m

Singapore Changi

Mon 12/7

10:30 pm-4:34 pm

2 stops34h 04m

$1,009

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 11/12

11:10 am-5:00 am

2 stops25h 50m

Singapore Changi

Tue 12/8

1:35 am-10:38 am

2 stops49h 03m

$1,010
Cheapest one-way

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 11/5

6:53 am-8:15 pm

1 stop21h 22m

$413

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 11/3

4:25 pm-8:15 pm

2 stops35h 50m

$413

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 11/24

5:30 am-8:15 pm

1 stop22h 45m

$413

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/21

Showing 1-10 of 14 resultsSorted by cheapest first
1
2

Best time to book a flight from Portland to Singapore

Have a flexible travel schedule? Discover the best time to fly to Singapore from Portland with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Portland to Singapore

What is the cheapest month to book a flight from Portland to Singapore?

Currently, August is the cheapest month in which you can book a flight from Portland to Singapore (average of $209). Flying from Portland to Singapore in June is currently the most expensive (average of $950). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How far ahead should I book a flight from Portland to Singapore?

The price you pay for your flight from Portland to Singapore may vary depending on when you book. For the best chance of a lower fare, look to book 46 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Reviews of airlines servicing Singapore

Get insights into the airlines that provide service to Singapore. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Singapore. Reviews last updated June 21, 2026.
Read reviews from past customers who have flown Singapore Airlines,United Airlines, andAir Canada from Portland to Singapore. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8.2
Very good
1,547 reviews

Boarding

8.3

Crew

8.6

Entertainment

8.1

Comfort

8.0

Food

7.8

Overall

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SYD - SIN

creat a group of Senior (75 above) to allow them board the flight ahead of other groups.
Singapore Airlines
8.2
Very good
1,547 reviews
Singapore Airlines
8.2
Very good
1,547 reviews

Boarding

8.3

Crew

8.6

Entertainment

8.1

Comfort

8.0

Food

7.8

Overall

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SYD - SIN

creat a group of Senior (75 above) to allow them board the flight ahead of other groups.
United Airlines
7.4
Good
9,874 reviews
Singapore Airlines
8.2
Very good
1,547 reviews

Boarding

8.3

Crew

8.6

Entertainment

8.1

Comfort

8.0

Food

7.8

Overall

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SYD - SIN

creat a group of Senior (75 above) to allow them board the flight ahead of other groups.
Air Canada
7.1
Good
11,238 reviews
Singapore Airlines
8.2
Very good
1,547 reviews

Boarding

8.3

Crew

8.6

Entertainment

8.1

Comfort

8.0

Food

7.8

Overall

8.2

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SYD - SIN

creat a group of Senior (75 above) to allow them board the flight ahead of other groups.

Related info for your journey

Find useful and relevant information for your journey from Portland to Singapore. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Portland to Singapore?

    Located just 6.0 mi from the city center, Portland (PDX) is the airport most travelers will use when flying to Singapore from Portland.

  • How long is the flight from Portland to Singapore?

    There are many flights that can get you from Portland to Singapore in 26h 12m. Fly via United Airlines to get the fastest option. Airlines will cover a distance of 8123 mi.

  • What are the cheapest airlines to fly from Portland to Singapore one-way?

    The cheapest airlines for a one-way flight from Portland to Singapore are Air Canada ($387), ANA ($420), and Qatar Airways ($524).

  • Can I find deals for flights from Portland to Singapore that include hotel bookings?

    Yes. In addition to deals on Portland to Singapore flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to Singapore?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Singapore.

  • Can I find deals for business class flights from Portland to Singapore?

    Yes. Cheapflights offers flight deals from Portland to Singapore by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Portland to Singapore?

    Currently, August is the cheapest month in which you can book a flight from Portland to Singapore (average of $209). Flying from Portland to Singapore in June is currently the most expensive (average of $950). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Portland to Singapore

Discover the top 3 airlines that operate flights from Portland to Singapore. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$726Average$1,013FlexibilityNo cancel feeOn-time67%
Singapore AirlinesCheapest$837Average$998FlexibilityNo cancel feeOn-time81%
United AirlinesCheapest$1,024Average$1,324FlexibilityNo cancel feeOn-time69%

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