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$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 8/9. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SIN
may. 5 — may. 121
lun. 5/5
lun. 5/12
1 adult, Economy
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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 abril 30, 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.
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Provider most trusted by Cheapflights users for Portland-Singapore Changi flights.
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From Oregon to Singapore
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One-way flight from Oregon to Singapore
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Highest demand for flights based on searches. 9% potential increase in price ($112 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($38 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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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 abril 30, 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.
jue. 9/410:00 amPDX - SIN
1 stop30h 05mAir Canada
jue. 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.
mar. 9/233:25 pmPDX - SIN
1 stop24h 40mMultiple Airlines
mié. 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.
mié. 10/157:00 amPDX - SIN
1 stop21h 10mSingapore Airlines
mié. 10/299:15 amSIN - PDX
1 stop19h 04mSingapore Airlines
Deal found 4/29$798
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.
lun. 9/1510:38 amBOI - SIN
2 stops28h 22mDelta
jue. 9/257:30 amSIN - BOI
2 stops28h 37mDelta
Deal found 4/29$803
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.
sáb. 11/16:00 amPDX - SIN
2 stops27h 10mKorean Air
sáb. 11/151:30 amSIN - PDX
2 stops31h 36mKorean Air
Deal found 4/29$808
This KAYAK 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 5/167:45 amBOI - SIN
2 stops31h 15mKorean Air
jue. 5/221:10 amSIN - BOI
2 stops36h 18mKorean 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.
mar. 9/237:45 amPDX - SIN
1 stop19h 40mUnited Airlines
mié. 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.
jue. 9/45:30 amPDX - SIN
2 stops32h 30mDelta
mié. 9/241:10 amSIN - PDX
2 stops33h 03mDelta
Deal found 4/29$893
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.
mié. 10/17:45 amBOI - SIN
1 stop20h 40mUnited Airlines
vie. 10/108:45 amSIN - BOI
1 stop24h 24mUnited Airlines
Deal found 4/29$901
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.
mié. 10/112:43 pmBOI - SIN
2 stops45h 52mChina Airlines
jue. 10/92:00 amSIN - BOI
2 stops34h 59mChina Airlines
Deal found 4/29$1,275
This Gurufare 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 7/234:40 pmBOI - SIN
1 stop25h 10mSingapore Airlines
lun. 7/288:45 pmSIN - BOI
1 stop33h 12mSingapore Airlines
Deal found 4/29$1,483
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.
jue. 10/307:00 amPDX - SIN
2 stops43h 25mJapan Airlines
mar. 11/1810:25 pmSIN - PDX
2 stops39h 36mJapan Airlines
Deal found 4/29$1,628

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 abril 30, 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

jue. 9/4

10:00 am-7:05 am

1 stop30h 05m

Singapore Changi

jue. 9/25

9:10 am-6:46 pm

1 stop24h 36m

$707

PortlandSingapore

PDX - SIN

PDXSIN

Portland

mar. 9/23

3:25 pm-7:05 am

1 stop24h 40m

Singapore Changi

mié. 10/8

8:00 am-6:46 pm

2 stops25h 46m

$747

PortlandSingapore

PDX - SIN

PDXSIN

Portland

mié. 10/15

7:00 am-7:10 pm

1 stop21h 10m

Singapore Changi

mié. 10/29

9:15 am-1:19 pm

1 stop19h 04m

$798

BoiseSingapore

BOI - SIN

BOISIN

Boise Air Term. Gowen Fld

lun. 9/15

10:38 am-5:00 am

2 stops28h 22m

Singapore Changi

jue. 9/25

7:30 am-10:07 pm

2 stops28h 37m

$803

BoiseSingapore

BOI - SIN

BOISIN

Boise Air Term. Gowen Fld

vie. 5/16

7:45 am-5:00 am

2 stops31h 15m

Singapore Changi

jue. 5/22

1:10 am-11:28 pm

2 stops36h 18m

$808

PortlandSingapore

PDX - SIN

PDXSIN

Portland

mar. 9/23

7:45 am-6:25 pm

1 stop19h 40m

Singapore Changi

mié. 10/8

8:45 am-8:41 pm

1 stop26h 56m

$882

PortlandSingapore

PDX - SIN

PDXSIN

Portland

jue. 9/4

5:30 am-5:00 am

2 stops32h 30m

Singapore Changi

mié. 9/24

1:10 am-7:13 pm

2 stops33h 03m

$893

BoiseSingapore

BOI - SIN

BOISIN

Boise Air Term. Gowen Fld

mié. 10/1

7:45 am-6:25 pm

1 stop20h 40m

Singapore Changi

vie. 10/10

8:45 am-7:09 pm

1 stop24h 24m

$901

PortlandSingapore

PDX - SIN

PDXSIN

Portland

mar. 5/13

9:10 am-11:40 pm

2 stops23h 30m

Singapore Changi

sáb. 7/19

7:30 am-2:53 pm

2 stops22h 23m

$936

BoiseSingapore

BOI - SIN

BOISIN

Boise Air Term. Gowen Fld

mié. 10/1

12:43 pm-12:35 am

2 stops45h 52m

Singapore Changi

jue. 10/9

2:00 am-10:59 pm

2 stops34h 59m

$1,275

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 25 results
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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 abril 30, 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 abril 30, 2025.
Peruse reviews from past customers who have flown with Korean Air, Japan Airlines and China Airlines 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
1,066 reviews

Entertainment

8.2

Boarding

8.5

Overall

8.4

Crew

8.7

Food

8.1

Comfort

8.3

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

Entertainment

8.2

Boarding

8.5

Overall

8.4

Crew

8.7

Food

8.1

Comfort

8.3

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

Entertainment

8.2

Boarding

8.5

Overall

8.4

Crew

8.7

Food

8.1

Comfort

8.3

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.
China Airlines
8.3
Very good
732 reviews
Korean Air
8.4
Very good
1,066 reviews

Entertainment

8.2

Boarding

8.5

Overall

8.4

Crew

8.7

Food

8.1

Comfort

8.3

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

Entertainment

8.2

Boarding

8.5

Overall

8.4

Crew

8.7

Food

8.1

Comfort

8.3

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

Entertainment

8.2

Boarding

8.5

Overall

8.4

Crew

8.7

Food

8.1

Comfort

8.3

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 Korean Air and Air Canada, with prices starting from $457 and $475, 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

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Alternative routes for Oregon to Singapore

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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 abril 30, 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%

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