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$326+ 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 8/6. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SIN
Apr 20 — Apr 271
Mon 4/20
Mon 4/27
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 March 21, 2026.

This oojo deal was found by Cheapflights users on 3/17. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/157:00 am
PDX
-
SIN
1 stop21h 10m
Singapore Airlines
Wed 10/219:15 am
SIN
-
PDX
1 stop22h 35m
Singapore Airlines
Deal found 3/17$849
This oojo deal was found by Cheapflights users on 3/17. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/17:00 am
PDX
-
SIN
1 stop21h 10m
Singapore Airlines
Sat 10/109:15 am
SIN
-
PDX
1 stop19h 35m
Singapore Airlines
Deal found 3/17$892
This FlightHub deal was found by Cheapflights users on 3/17. 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 4/225:51 pm
PDX
-
SIN
2 stops59h 19m
Multiple Airlines
Sun 5/311:10 pm
SIN
-
PDX
2 stops39h 34m
Multiple Airlines
Deal found 3/17$904
This oojo deal was found by Cheapflights users on 3/20. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/157:00 am
PDX
-
SIN
1 stop21h 10m
Singapore Airlines
Mon 8/318:45 pm
SIN
-
PDX
1 stop27h 40m
Singapore Airlines
Deal found 3/20$931
This oojo deal was found by Cheapflights users on 3/17. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/27:00 am
PDX
-
SIN
1 stop21h 10m
Singapore Airlines
Fri 9/189:00 am
SIN
-
PDX
1 stop22h 37m
Singapore Airlines
Deal found 3/17$946
This oojo deal was found by Cheapflights users on 3/21. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/37:00 am
PDX
-
SIN
1 stop21h 10m
Singapore Airlines
Fri 9/119:00 am
SIN
-
PDX
1 stop22h 37m
Singapore Airlines
Deal found 3/21$957
This Expedia deal was found by Cheapflights users on 3/17. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/155:35 pm
PDX
-
SIN
2 stops24h 30m
Multiple Airlines
Wed 10/2111:05 pm
SIN
-
PDX
2 stops35h 01m
Multiple Airlines
Deal found 3/17$958
This FlightHub deal was found by Cheapflights users on 3/21. 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.
Thu 9/36:54 am
PDX
-
SIN
2 stops25h 26m
ANA
Fri 9/116:15 am
SIN
-
PDX
2 stops23h 32m
ANA
Deal found 3/21$973
This Singapore Airlines deal was found by Cheapflights users on 3/18. 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 Singapore Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/29:50 pm
PDX
-
SIN
1 stop29h 15m
Multiple Airlines
Fri 12/189:00 am
SIN
-
PDX
1 stop17h 50m
Multiple Airlines
Deal found 3/18$985
This Gurufare deal was found by Cheapflights users on 3/19. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/225:30 am
PDX
-
SIN
2 stops26h 50m
ANA
Fri 5/112:50 am
SIN
-
PDX
2 stops29h 07m
ANA
Deal found 3/19$989
This oojo deal was found by Cheapflights users on 3/19. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/22:30 pm
PDX
-
SIN
1 stop23h 15m
Singapore Airlines
Fri 12/189:00 am
SIN
-
PDX
1 stop19h 22m
Singapore Airlines
Deal found 3/19$998

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 March 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$904
(FlightHub)

One-way from

$326
(oojo)

Popular in

December

Cheapest in

May

Average price

$978
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. 13% potential increase in price ($157 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($59 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 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

Sat 8/15

6:30 am-9:55 pm

2 stops48h 25m

Singapore Changi

Mon 8/31

11:10 pm-11:54 pm

2 stops39h 44m

$1,063

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 5/18

7:45 pm-2:30 pm

2 stops27h 45m

Singapore Changi

Tue 6/9

7:00 am-7:05 pm

1 stop27h 05m

$1,173

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Fri 5/8

5:30 am-6:35 pm

1 stop22h 05m

Singapore Changi

Tue 5/19

9:00 am-6:46 pm

1 stop24h 46m

$1,204

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 5/18

5:30 am-6:35 pm

1 stop22h 05m

Singapore Changi

Tue 6/9

8:35 pm-12:50 am

1 stop19h 15m

$1,204

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 5/2

7:45 pm-6:45 am

1 stop20h 00m

Singapore Changi

Thu 5/7

9:00 am-9:09 pm

2 stops27h 09m

$1,209

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 5/24

11:16 am-6:35 pm

1 stop40h 19m

Singapore Changi

Wed 6/3

8:45 am-10:48 pm

1 stop29h 03m

$1,261
Quickest round-trip

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 4/14

5:35 pm-6:45 am

1 stop22h 10m

Singapore Changi

Tue 4/21

9:00 am-12:25 pm

1 stop18h 25m

$1,276
Cheapest one-way

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 8/30

1:30 pm-9:05 am

2 stops28h 35m

$326

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 4/18

9:00 am-5:35 pm

1 stop41h 35m

$511

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 8/6

3:30 pm-5:15 am

1 stop22h 45m

$546

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/18

Showing 1-10 of 15 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, September is the cheapest month in which you can book a flight from Portland to Singapore (average of $693). Flying from Portland to Singapore in July is currently the most expensive (average of $883). 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.

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 March 21, 2026.
Read reviews from past customers who have flown Korean Air,Singapore Airlines, andUnited Airlines 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.
Korean Air
8.4
Very good
1,205 reviews

Overall

8.4

Crew

8.7

Comfort

8.3

Boarding

8.5

Food

8.1

Entertainment

8.2

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Korean Air
8.4
Very good
1,205 reviews
Korean Air
8.4
Very good
1,205 reviews

Overall

8.4

Crew

8.7

Comfort

8.3

Boarding

8.5

Food

8.1

Entertainment

8.2

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Singapore Airlines
8.2
Very good
1,480 reviews
Korean Air
8.4
Very good
1,205 reviews

Overall

8.4

Crew

8.7

Comfort

8.3

Boarding

8.5

Food

8.1

Entertainment

8.2

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
United Airlines
7.4
Good
9,451 reviews
Korean Air
8.4
Very good
1,205 reviews

Overall

8.4

Crew

8.7

Comfort

8.3

Boarding

8.5

Food

8.1

Entertainment

8.2

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Air Canada
7.1
Good
10,821 reviews
Korean Air
8.4
Very good
1,205 reviews

Overall

8.4

Crew

8.7

Comfort

8.3

Boarding

8.5

Food

8.1

Entertainment

8.2

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

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 22h 05m. Fly via Air Canada or United Airlines to get the fastest option. Airlines will cover a distance of 8123 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 United Airlines ($568).

  • 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, September is the cheapest month in which you can book a flight from Portland to Singapore (average of $693). Flying from Portland to Singapore in July is currently the most expensive (average of $883). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 4 airlines flying from Portland to Singapore

Discover the top 4 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 March 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$694Average$870FlexibilityNo cancel feeOn-time67%
Korean AirCheapest$786Average$978FlexibilityNo cancel feeOn-time81%
Singapore AirlinesCheapest$837Average$1,003FlexibilityNo cancel feeOn-time81%
United AirlinesCheapest$915Average$1,130FlexibilityNo cancel feeOn-time69%

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