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$436+ 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 4/17. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SIN
Feb 19 — Feb 261
Thu 2/19
Thu 2/26
1 adult, Economy
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Cheap flight deals from Portland to Singapore

Keep the following information in mind while searching for Portland to Singapore flight deals. Data was last updated January 20, 2026.

Most accurate provider

oojo
3 stars

Most trusted provider

oojo
3 stars

Round-trip from

$815
(oojo)

One-way from

$436
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$879
Provider with most accurate pricing for Portland-Singapore Changi flight deals.
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Provider most trusted by Cheapflights users for Portland-Singapore Changi flights.
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From Portland to Singapore
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One-way flight from Portland to Singapore
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Highest demand for flights based on searches. 14% potential increase in price ($168 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($63 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Find 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 January 20, 2026.

This oojo deal was found by Cheapflights users on 1/19. 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.
Tue 10/276:07 am
PDX
-
SIN
1 stop20h 38m
Singapore Airlines
Mon 11/169:15 am
SIN
-
PDX
1 stop23h 35m
Singapore Airlines
Deal found 1/19$771
This oojo deal was found by Cheapflights users on 1/18. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/287:00 am
PDX
-
SIN
1 stop21h 05m
Singapore Airlines
Mon 11/169:15 am
SIN
-
PDX
1 stop27h 33m
Singapore Airlines
Deal found 1/18$789
This oojo deal was found by Cheapflights users on 1/18. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/202:48 pm
PDX
-
SIN
1 stop23h 27m
Singapore Airlines
Tue 5/269:00 am
SIN
-
PDX
1 stop27h 34m
Singapore Airlines
Deal found 1/18$815
This oojo deal was found by Cheapflights users on 1/19. 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.
Mon 3/29:48 pm
PDX
-
SIN
1 stop29h 17m
Singapore Airlines
Wed 4/229:15 am
SIN
-
PDX
1 stop19h 32m
Singapore Airlines
Deal found 1/19$832
This oojo deal was found by Cheapflights users on 1/18. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/267:00 am
PDX
-
SIN
1 stop21h 10m
Singapore Airlines
Sat 5/29:15 am
SIN
-
PDX
1 stop22h 07m
Singapore Airlines
Deal found 1/18$874
This Singapore Airlines deal was found by Cheapflights users on 1/19. 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 Singapore Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:07 am
PDX
-
SIN
1 stop20h 38m
Multiple Airlines
Mon 11/169:15 am
SIN
-
PDX
1 stop20h 35m
Multiple Airlines
Deal found 1/19$881
This oojo deal was found by Cheapflights users on 1/20. 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.
Thu 3/267:05 am
PDX
-
SIN
1 stop21h 00m
Singapore Airlines
Mon 4/68:45 pm
SIN
-
PDX
1 stop27h 50m
Singapore Airlines
Deal found 1/20$913
This FlightHub deal was found by Cheapflights users on 1/18. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/159:30 pm
PDX
-
SIN
2 stops24h 10m
STARLUX Airlines
Mon 8/312:00 pm
SIN
-
PDX
2 stops25h 10m
STARLUX Airlines
Deal found 1/18$922
This oojo deal was found by Cheapflights users on 1/19. 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.
Sat 5/27:00 am
PDX
-
SIN
1 stop21h 10m
Singapore Airlines
Thu 5/79:00 am
SIN
-
PDX
1 stop18h 52m
Singapore Airlines
Deal found 1/19$930

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 January 20, 2026.
Use the filters below to find and compare flights from Portland to Singapore that are best for you.

Fly from

Portland

Fly to

Singapore

Route

Depart

Return

Price

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 3/5

5:30 am-8:15 pm

1 stop22h 45m

Singapore Changi

Thu 3/12

10:10 am-11:04 pm

1 stop27h 54m

$1,026

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 3/5

7:30 am-8:15 pm

1 stop20h 45m

Singapore Changi

Tue 3/17

10:10 am-6:48 pm

1 stop23h 38m

$1,026

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 3/12

1:39 pm-7:00 am

1 stop26h 21m

Singapore Changi

Mon 3/23

10:10 am-6:48 pm

1 stop23h 38m

$1,026

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Fri 3/13

9:48 pm-7:00 am

3 stops42h 12m

Singapore Changi

Sun 3/22

11:00 pm-8:32 pm

2 stops36h 32m

$1,028

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 3/2

7:30 am-8:15 pm

1 stop20h 45m

Singapore Changi

Tue 4/21

9:00 am-9:14 pm

2 stops27h 14m

$1,030

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 3/8

1:39 pm-8:15 pm

1 stop39h 36m

Singapore Changi

Mon 3/16

10:10 am-11:04 pm

1 stop27h 54m

$1,032

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 3/5

7:15 am-5:00 am

2 stops29h 45m

Singapore Changi

Tue 3/17

10:40 am-8:59 pm

2 stops25h 19m

$1,039

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 3/5

5:30 am-12:10 am

2 stops26h 40m

Singapore Changi

Tue 4/21

7:30 am-9:34 pm

2 stops29h 04m

$1,039

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 3/12

1:39 pm-7:00 am

1 stop26h 21m

Singapore Changi

Sat 3/21

10:10 am-11:09 pm

1 stop27h 59m

$1,040

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 3/14

1:39 pm-7:00 am

1 stop26h 21m

Singapore Changi

Mon 3/23

10:10 am-6:48 pm

1 stop23h 38m

$1,040

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/19

Showing 1-10 of 19 results
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 December is currently the most expensive (average of $827). 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 January 20, 2026.
Read reviews from past customers who have flown Korean Air, Singapore Airlines, and Delta 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
1,187 reviews

Comfort

8.3

Crew

8.7

Overall

8.4

Food

8.1

Entertainment

8.2

Boarding

8.5

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
1,187 reviews
Korean Air
8.4
Very good
1,187 reviews

Comfort

8.3

Crew

8.7

Overall

8.4

Food

8.1

Entertainment

8.2

Boarding

8.5

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
8.1
Very good
1,433 reviews
Korean Air
8.4
Very good
1,187 reviews

Comfort

8.3

Crew

8.7

Overall

8.4

Food

8.1

Entertainment

8.2

Boarding

8.5

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.
Delta
7.9
Good
8,080 reviews
Korean Air
8.4
Very good
1,187 reviews

Comfort

8.3

Crew

8.7

Overall

8.4

Food

8.1

Entertainment

8.2

Boarding

8.5

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
9,183 reviews
Korean Air
8.4
Very good
1,187 reviews

Comfort

8.3

Crew

8.7

Overall

8.4

Food

8.1

Entertainment

8.2

Boarding

8.5

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
10,637 reviews
Korean Air
8.4
Very good
1,187 reviews

Comfort

8.3

Crew

8.7

Overall

8.4

Food

8.1

Entertainment

8.2

Boarding

8.5

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 20h 45m. Fly via United Airlines to get the fastest option. Airlines will cover a distance of 8123 mi.

  • 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 December is currently the most expensive (average of $827). 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

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Alternative routes for Portland to Singapore

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Portland to Singapore

Discover the top 5 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 January 20, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$694Average$838FlexibilityNo cancel feeOn-time67%
Singapore AirlinesCheapest$789Average$1,081FlexibilityNo cancel feeOn-time81%
Korean AirCheapest$792Average$943FlexibilityNo cancel feeOn-time81%
DeltaCheapest$800Average$921FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$869Average$1,034FlexibilityNo cancel feeOn-time69%

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