HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Singapore

$409+ Cheap flights from Oregon 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 4/25. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SIN
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Oregon 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 Oregon to Singapore

Keep the following information in mind while searching for Oregon to Singapore flight deals. Data was last updated March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$706
(Air Canada)

One-way from

$409
(United Airlines)

Popular in

December

Cheapest in

February

Average price

$1,045
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 Oregon to Singapore
Search Deals
One-way flight from Oregon to Singapore
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($64 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
Search Deals

Find flight deals from Oregon to Singapore

Cheapest flights from Oregon to Singapore
Explore the most affordable flight options available from Oregon to Singapore. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.

This Air Canada deal was found by Cheapflights users on 3/27. 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 5/16:15 amPDX - SIN
1 stop33h 50mAir Canada
Thu 5/159:10 amSIN - PDX
1 stop28h 45mAir Canada
Deal found 3/27$706
This Justfly.com deal was found by Cheapflights users on 3/27. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1610:10 amPDX - SIN
1 stop29h 55mMultiple Airlines
Mon 9/298:00 amSIN - PDX
2 stops29h 56mMultiple Airlines
Deal found 3/27$746
This Delta deal was found by Cheapflights users on 3/27. 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.
Mon 9/156:05 amBOI - SIN
2 stops32h 55mDelta
Thu 9/257:30 amSIN - BOI
2 stops27h 34mDelta
Deal found 3/27$801
This Justfly.com deal was found by Cheapflights users on 3/27. 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 Justfly.com 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 3/27$858
This FlightHub deal was found by Cheapflights users on 3/27. 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 9/47:00 amPDX - SIN
2 stops26h 20mJapan Airlines
Wed 9/241:55 amSIN - PDX
2 stops34h 35mJapan Airlines
Deal found 3/27$873
This United Airlines deal was found by Cheapflights users on 3/27. 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 4/76:00 amPDX - SIN
1 stop21h 25mUnited Airlines
Tue 4/229:00 amSIN - PDX
1 stop18h 33mUnited Airlines
Deal found 3/27$881
This Delta deal was found by Cheapflights users on 3/27. 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 5/88:00 pmPDX - SIN
2 stops42h 00mDelta
Thu 5/157:30 amSIN - PDX
2 stops26h 50mDelta
Deal found 3/27$897
This United deal was found by Cheapflights users on 3/26. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/18:40 amBOI - SIN
1 stop19h 45mUnited Airlines
Fri 10/108:45 amSIN - BOI
1 stop22h 13mUnited Airlines
Deal found 3/26$926
This oojo deal was found by Cheapflights users on 3/27. 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 4/712:57 pmPDX - SIN
2 stops49h 03mKorean Air
Mon 4/211:10 amSIN - PDX
2 stops54h 33mKorean Air
Deal found 3/27$932
This United Airlines deal was found by Cheapflights users on 3/27. 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 5/114:07 pmEUG - SIN
2 stops35h 18mUnited Airlines
Sun 5/1811:05 amSIN - EUG
2 stops48h 25mUnited Airlines
Deal found 3/27$1,007
This China Airlines deal was found by Cheapflights users on 3/26. 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 China Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/112:21 pmBOI - SIN
2 stops34h 14mMultiple Airlines
Thu 10/92:00 amSIN - BOI
2 stops50h 34mMultiple Airlines
Deal found 3/26$1,226
This Cheapflightsfares deal was found by Cheapflights users on 3/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/186:05 amPDX - SIN
2 stops32h 20mChina Eastern
Fri 5/212:55 amSIN - PDX
2 stops29h 58mChina Eastern
Deal found 3/28$1,334

Cheapflights Fare Finder

Customize your flight search to find flights from Oregon 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 28, 2025.
Use the filters below to find and compare flights from Oregon to Singapore that are best for you.

Fly from

Oregon

Fly to

Singapore

Route

Depart

Return

Price

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 5/1

6:15 am-7:05 am

1 stop33h 50m

Singapore Changi

Thu 5/15

9:10 am-10:55 pm

1 stop28h 45m

$706

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Tue 9/16

10:10 am-7:05 am

1 stop29h 55m

Singapore Changi

Mon 9/29

8:00 am-10:56 pm

2 stops29h 56m

$746

BoiseSingapore

BOI - SIN

BOISIN

Boise Air Term. Gowen Fld

Mon 9/15

6:05 am-5:00 am

2 stops32h 55m

Singapore Changi

Thu 9/25

7:30 am-9:04 pm

2 stops27h 34m

$801

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 9/4

7:00 am-12:20 am

2 stops26h 20m

Singapore Changi

Wed 9/24

1:55 am-9:30 pm

2 stops34h 35m

$873

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 4/7

6:00 am-6:25 pm

1 stop21h 25m

Singapore Changi

Tue 4/22

9:00 am-12:33 pm

1 stop18h 33m

$881

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Thu 5/8

8:00 pm-5:00 am

2 stops42h 00m

Singapore Changi

Thu 5/15

7:30 am-7:20 pm

2 stops26h 50m

$897

BoiseSingapore

BOI - SIN

BOISIN

Boise Air Term. Gowen Fld

Sun 4/6

6:30 am-6:45 am

2 stops34h 15m

Singapore Changi

Sat 4/19

9:00 am-5:52 pm

2 stops22h 52m

$930

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Wed 9/17

7:00 am-7:10 pm

1 stop21h 10m

Singapore Changi

Tue 9/30

9:15 am-9:47 am

1 stop39h 32m

$931

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 4/7

12:57 pm-5:00 am

2 stops49h 03m

Singapore Changi

Mon 4/21

1:10 am-4:43 pm

2 stops54h 33m

$932

EugeneSingapore

EUG - SIN

EUGSIN

Eugene

Sun 5/11

4:07 pm-6:25 pm

2 stops35h 18m

Singapore Changi

Sun 5/18

11:05 am-8:30 pm

2 stops48h 25m

$1,007

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 28 results
1
2
3

Best time to book a flight from Oregon to Singapore

Have a flexible travel schedule? Discover the best time to fly to Singapore from Oregon 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 Oregon to Singapore

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

Currently, September is the cheapest month in which you can book a flight from Oregon to Singapore (average of $1,011). Flying from Oregon 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 OR to SG?

Find hourly flight availability from Oregon 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 March 28, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Oregon to Singapore as you normally would.

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 March 28, 2025.
Peruse reviews from past customers who have flown with Korean Air, Japan Airlines and ANA from Oregon to Singapore to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,050 reviews

Crew

8.7

Food

8.1

Entertainment

8.2

Overall

8.4

Comfort

8.3

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
1,050 reviews
Korean Air
8.4
Very good
1,050 reviews

Crew

8.7

Food

8.1

Entertainment

8.2

Overall

8.4

Comfort

8.3

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.
Japan Airlines
8.3
Very good
1,440 reviews
Korean Air
8.4
Very good
1,050 reviews

Crew

8.7

Food

8.1

Entertainment

8.2

Overall

8.4

Comfort

8.3

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.
ANA
8.3
Very good
829 reviews
Korean Air
8.4
Very good
1,050 reviews

Crew

8.7

Food

8.1

Entertainment

8.2

Overall

8.4

Comfort

8.3

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
1,285 reviews
Korean Air
8.4
Very good
1,050 reviews

Crew

8.7

Food

8.1

Entertainment

8.2

Overall

8.4

Comfort

8.3

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.
Fiji Airways
8.0
Very good
182 reviews
Korean Air
8.4
Very good
1,050 reviews

Crew

8.7

Food

8.1

Entertainment

8.2

Overall

8.4

Comfort

8.3

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 Oregon to Singapore. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    $409 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Japan Airlines and Delta, with prices starting from $412 and $458, respectively.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Oregon 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 Oregon to Singapore?

    Currently, September is the cheapest month in which you can book a flight from Oregon to Singapore (average of $1,011). Flying from Oregon 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 Oregon to Singapore

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Haneda flights
Los Angeles to Narita flights
John F Kennedy Intl to Haneda flights
Newark to Haneda flights
Newark to Narita flights
San Francisco to Haneda flights
Seattle to Narita flights
Los Angeles to Manila flights
San Francisco to Narita flights
John F Kennedy Intl to Narita flights
Seattle to Haneda flights
Dulles Intl to Haneda flights
Dallas/Fort Worth to Narita flights
San Francisco to Manila flights
LaGuardia to Haneda flights
Dallas/Fort Worth to Haneda flights
Los Angeles to Suvarnabhumi flights
LaGuardia to Narita flights
Los Angeles to Incheon Intl flights
John F Kennedy Intl to Suvarnabhumi flights
O'Hare Intl to Narita flights
Hobby to Haneda flights
O'Hare Intl to Haneda flights
Boston to Narita flights
Ontario to Narita flights
Newark to New Delhi flights
John F Kennedy Intl to Incheon Intl flights
Atlanta to Haneda flights
Dulles Intl to Narita flights
John F Kennedy Intl to Hong Kong flights
Ontario to Haneda flights
San Francisco to New Delhi flights
Los Angeles to Taiwan Taoyuan Intl flights
George Bush Intcntl to Haneda flights
John F Kennedy Intl to New Delhi flights
Newark to Suvarnabhumi flights
John F Kennedy Intl to Manila flights
Los Angeles to Hongqiao Intl flights
John F Kennedy Intl to Hongqiao Intl flights
San Diego to Narita flights
Seattle to Manila flights
Dallas/Fort Worth to Suvarnabhumi flights
John F Kennedy Intl to Mumbai flights
Dallas/Fort Worth to Hyderabad flights
Seattle to Incheon Intl flights
O'Hare Intl to Suvarnabhumi flights
Denver to Narita flights
San Francisco to Hong Kong flights
Los Angeles to Ho Chi Minh City flights
Reagan-National to Haneda flights

Top 5 airlines flying from Oregon to Singapore

Discover the top 5 airlines that operate flights from Oregon 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 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$727Average$1,008FlexibilityNo cancel feeOn-time67%
DeltaCheapest$800Average$921FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$845Average$1,231FlexibilityNo cancel feeOn-time69%
Korean AirCheapest$930Average$931FlexibilityNo cancel feeOn-time81%
Singapore AirlinesCheapest$1,023Average$1,288FlexibilityNo 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.