HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Singapore

$409+ 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 8/9. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SIN
May 4 — May 111
Sun 5/4
Sun 5/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Portland to Singapore with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 April 29, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$707
(Air Canada)

One-way from

$409
(United Airlines)

Popular in

December

Cheapest in

February

Average price

$1,040
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. 9% potential increase in price ($112 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

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 April 29, 2025.

This Air Canada deal was found by Cheapflights users on 4/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/410:00 amPDX - SIN
1 stop30h 05mAir Canada
Thu 9/259:10 amSIN - PDX
1 stop24h 36mAir Canada
Deal found 4/29$707
This FlightHub deal was found by Cheapflights users on 4/29. 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.
Tue 9/233:25 pmPDX - SIN
1 stop24h 40mMultiple Airlines
Wed 10/88:00 amSIN - PDX
2 stops25h 46mMultiple Airlines
Deal found 4/29$747
This FlightHub deal was found by Cheapflights users on 4/29. 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 10/157:00 amPDX - SIN
1 stop21h 10mSingapore Airlines
Wed 10/299:15 amSIN - PDX
1 stop19h 04mSingapore Airlines
Deal found 4/29$798
This Korean Air deal was found by Cheapflights users on 4/29. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/16:00 amPDX - SIN
2 stops27h 10mKorean Air
Sat 11/151:30 amSIN - PDX
2 stops31h 36mKorean Air
Deal found 4/29$808
This United Airlines deal was found by Cheapflights users on 4/29. 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 9/237:45 amPDX - SIN
1 stop19h 40mUnited Airlines
Wed 10/88:45 amSIN - PDX
1 stop26h 56mUnited Airlines
Deal found 4/29$882
This Delta deal was found by Cheapflights users on 4/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/45:30 amPDX - SIN
2 stops32h 30mDelta
Wed 9/241:10 amSIN - PDX
2 stops33h 03mDelta
Deal found 4/29$893
This Ovago deal was found by Cheapflights users on 4/29. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/307:00 amPDX - SIN
2 stops43h 25mJapan Airlines
Tue 11/1810:25 pmSIN - PDX
2 stops39h 36mJapan Airlines
Deal found 4/29$1,628
This oojo deal was found by Cheapflights users on 4/29. 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 12/201:45 pmPDX - SIN
2 stops31h 20mChina Airlines
Wed 1/72:15 pmSIN - PDX
2 stops35h 32mChina Airlines
Deal found 4/29$1,820
This KLM deal was found by Cheapflights users on 4/29. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/151:15 pmPDX - SIN
1 stop35h 15mKLM
Tue 10/281:40 amSIN - PDX
1 stop25h 45mKLM
Deal found 4/29$2,006
This AranGrant deal was found by Cheapflights users on 4/29. 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 AranGrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/305:30 pmPDX - SIN
2 stops31h 15mCathay Pacific
Mon 11/171:25 amSIN - PDX
2 stops31h 03mCathay Pacific
Deal found 4/29$2,190
This Fiji Airways deal was found by Cheapflights users on 4/29. 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 Fiji Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/295:33 pmPDX - SIN
3 stops33h 27mFiji Airways
Thu 6/51:55 pmSIN - PDX
3 stops46h 38mFiji Airways
Deal found 4/29$2,262
This oojo deal was found by Cheapflights users on 4/29. 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 4/3011:20 amPDX - SIN
2 stops33h 40mEVA Air
Wed 5/73:10 pmSIN - PDX
2 stops33h 38mEVA Air
Deal found 4/29$5,119

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 April 29, 2025.
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 9/4

10:00 am-7:05 am

1 stop30h 05m

Singapore Changi

Thu 9/25

9:10 am-6:46 pm

1 stop24h 36m

$707

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 9/23

3:25 pm-7:05 am

1 stop24h 40m

Singapore Changi

Wed 10/8

8:00 am-6:46 pm

2 stops25h 46m

$747

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 10/15

7:00 am-7:10 pm

1 stop21h 10m

Singapore Changi

Wed 10/29

9:15 am-1:19 pm

1 stop19h 04m

$798

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 9/23

7:45 am-6:25 pm

1 stop19h 40m

Singapore Changi

Wed 10/8

8:45 am-8:41 pm

1 stop26h 56m

$882

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 9/4

5:30 am-5:00 am

2 stops32h 30m

Singapore Changi

Wed 9/24

1:10 am-7:13 pm

2 stops33h 03m

$893

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 5/13

9:10 am-11:40 pm

2 stops23h 30m

Singapore Changi

Sat 7/19

7:30 am-2:53 pm

2 stops22h 23m

$936

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 10/15

1:15 pm-3:30 pm

1 stop35h 15m

Singapore Changi

Tue 10/28

1:40 am-12:25 pm

1 stop25h 45m

$2,006

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 5/29

5:33 pm-6:00 pm

3 stops33h 27m

Singapore Changi

Thu 6/5

1:55 pm-9:33 pm

3 stops46h 38m

$2,262

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 6/3

7:00 am-12:50 am

2 stops26h 50m

Singapore Changi

Wed 6/11

1:50 am-4:50 pm

2 stops30h 00m

$2,544

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 10/1

7:00 am-12:20 am

2 stops26h 20m

Singapore Changi

Mon 10/20

8:05 am-1:46 pm

2 stops20h 41m

$4,159

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

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 $1,011). Flying from Portland to Singapore in December is currently the most expensive (average of $1,684). 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.

What is the cheapest time of day to fly from PDX to SG?

Find hourly flight availability from Portland to Singapore. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 29, 2025.

When flying from Portland to Singapore, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Singapore by month

Plan your trip to Singapore by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Singapore ranges from 5.9 - 10.6 inches per month. December is typically the wettest month, when rainfall can reach 10.6 in. July is typically the driest time to visit Singapore when rainfall is around 5.9 in.

Temperature in Singapore by month

Plan your trip to Singapore by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Singapore, use this chart to help with planning. For those seeking warmer temperatures, March is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 78.8 F).

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 April 29, 2025.
Read reviews from past customers who have flown Korean Air, Japan Airlines and ANA from Portland to Singapore. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,066 reviews

Food

8.1

Boarding

8.5

Comfort

8.3

Overall

8.4

Crew

8.7

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
1,066 reviews
Korean Air
8.4
Very good
1,066 reviews

Food

8.1

Boarding

8.5

Comfort

8.3

Overall

8.4

Crew

8.7

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.
Japan Airlines
8.3
Very good
1,459 reviews
Korean Air
8.4
Very good
1,066 reviews

Food

8.1

Boarding

8.5

Comfort

8.3

Overall

8.4

Crew

8.7

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.
ANA
8.3
Very good
852 reviews
Korean Air
8.4
Very good
1,066 reviews

Food

8.1

Boarding

8.5

Comfort

8.3

Overall

8.4

Crew

8.7

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.
Fiji Airways
8.1
Very good
190 reviews
Korean Air
8.4
Very good
1,066 reviews

Food

8.1

Boarding

8.5

Comfort

8.3

Overall

8.4

Crew

8.7

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
8.1
Very good
1,292 reviews
Korean Air
8.4
Very good
1,066 reviews

Food

8.1

Boarding

8.5

Comfort

8.3

Overall

8.4

Crew

8.7

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.

  • 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 United Airlines ($409), Korean Air ($457), and Air Canada ($475).

  • 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 $1,011). Flying from Portland to Singapore in December is currently the most expensive (average of $1,684). 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.

Alternative routes for Portland to Singapore

See prices for flight routes from nearby airports that may be better suited for you.
Portland to Narita flights
Portland to Haneda flights
Portland to Suvarnabhumi flights
Portland to Incheon Intl flights
Portland to Kansai Intl flights
Portland to Ho Chi Minh City flights
Portland to Hong Kong flights
Portland to Itami flights
Boise to Narita flights
Portland to Manila flights
Portland to Gimpo Intl flights
Portland to Denpasar flights
Portland to Mumbai flights
Portland to Kobe flights
Portland to Kuala Lumpur Intl flights
Boise to Suvarnabhumi flights
Boise to Haneda flights
Portland to Taiwan Taoyuan Intl flights
Portland to New Delhi flights
Portland to Singapore flights
Portland to Sung Shan flights
Boise to Ho Chi Minh City flights
Eugene to Narita flights
Eugene to Haneda flights
Portland to Kathmandu flights
Portland to Chiang Mai flights
Portland to Chubu Centrair Intl flights
Medford to Suvarnabhumi flights
Portland to Fukuoka flights
Eugene to Suvarnabhumi flights
Portland to Hongqiao Intl flights
Portland to Hanoi flights
Portland to Phuket City flights
Portland to Hyderabad flights
Portland to Capital flights
Portland to Pu Dong flights
Portland to Phnom Penh flights
Boise to Manila flights
Portland to Okinawa flights
Portland to Bangalore flights
Portland to Da Nang flights
Portland to Chennai flights
Portland to Malé flights
Portland to Soekarno-Hatta Intl flights
Redmond to Suvarnabhumi flights
Boise to Singapore flights
Portland to Cebu City flights
Boise to Denpasar flights
Portland to Guangzhou flights
Portland to Don Mueang Intl flights

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 April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$714Average$865FlexibilityNo cancel feeOn-time67%
DeltaCheapest$800Average$921FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$838Average$1,215FlexibilityNo cancel feeOn-time69%
Korean AirCheapest$930Average$931FlexibilityNo cancel feeOn-time81%
Singapore AirlinesCheapest$1,009Average$1,250FlexibilityNo cancel feeOn-time81%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.