HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Singapore

$413+ 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 7/22. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SIN
Jul 29 — Aug 51
Wed 7/29
Wed 8/5
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

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 June 29, 2026.

This United Airlines deal was found by Cheapflights users on 6/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1711:15 am
PDX
-
SIN
1 stop28h 00m
United Airlines
Tue 9/18:35 pm
SIN
-
PDX
1 stop28h 36m
United Airlines
Deal found 6/28$891
This United Airlines deal was found by Cheapflights users on 6/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/267:07 pm
PDX
-
SIN
2 stops34h 08m
United Airlines
Thu 10/2910:10 am
SIN
-
PDX
2 stops27h 57m
United Airlines
Deal found 6/28$895
This United Airlines deal was found by Cheapflights users on 6/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/26:46 pm
PDX
-
SIN
1 stop32h 49m
United Airlines
Thu 8/208:35 pm
SIN
-
PDX
1 stop28h 36m
United Airlines
Deal found 6/28$896
This United Airlines deal was found by Cheapflights users on 6/24. 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 8/257:00 am
PDX
-
SIN
1 stop20h 35m
United Airlines
Mon 9/78:35 pm
SIN
-
PDX
1 stop30h 25m
United Airlines
Deal found 6/24$897
This United Airlines deal was found by Cheapflights users on 6/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/113:36 pm
PDX
-
SIN
2 stops47h 19m
United Airlines
Mon 12/710:20 pm
SIN
-
PDX
1 stop18h 34m
United Airlines
Deal found 6/28$900
This United Airlines deal was found by Cheapflights users on 6/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/211:16 am
PDX
-
SIN
1 stop40h 19m
United Airlines
Wed 8/198:35 pm
SIN
-
PDX
2 stops31h 39m
United Airlines
Deal found 6/28$901
This United Airlines deal was found by Cheapflights users on 6/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/35:15 am
PDX
-
SIN
1 stop22h 20m
United Airlines
Thu 8/206:15 am
SIN
-
PDX
2 stops33h 15m
United Airlines
Deal found 6/28$902
This United Airlines deal was found by Cheapflights users on 6/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/45:00 am
PDX
-
SIN
2 stops34h 15m
United Airlines
Tue 8/186:15 am
SIN
-
PDX
2 stops31h 30m
United Airlines
Deal found 6/28$907
This United Airlines deal was found by Cheapflights users on 6/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/26:46 pm
PDX
-
SIN
1 stop32h 49m
United Airlines
Tue 8/186:15 am
SIN
-
PDX
2 stops31h 30m
United Airlines
Deal found 6/28$908
This FlightHub deal was found by Cheapflights users on 6/24. 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 11/125:30 am
PDX
-
SIN
2 stops27h 25m
ANA
Thu 12/106:35 am
SIN
-
PDX
2 stops27h 56m
ANA
Deal found 6/24$912
This United Airlines deal was found by Cheapflights users on 6/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/35:15 am
PDX
-
SIN
2 stops28h 30m
United Airlines
Tue 8/186:15 am
SIN
-
PDX
2 stops31h 30m
United Airlines
Deal found 6/28$914
This oojo deal was found by Cheapflights users on 6/27. 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.
Thu 8/2010:14 am
BOI
-
SIN
2 stops39h 31m
Qatar Airways
Mon 8/317:40 pm
SIN
-
BOI
2 stops40h 47m
Qatar Airways
Deal found 6/27$1,083

Find flight deals from Oregon to Singapore

Keep the following information in mind while searching for Oregon to Singapore flight deals. Data was last updated June 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$891
(United Airlines)

One-way from

$413
(United Airlines)

Popular in

December

Cheapest in

January

Average price

$1,295
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. 9% potential increase in price ($119 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($62 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

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 June 29, 2026.
Use the filters below to find and compare flights from Oregon to Singapore that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Mon 8/17

11:15 am-6:15 am

1 stop28h 00m

Singapore Changi

Tue 9/1

8:35 pm-10:11 am

1 stop28h 36m

$891

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sat 8/15

11:15 am-6:15 am

1 stop28h 00m

Singapore Changi

Mon 8/31

8:45 am-10:45 pm

1 stop29h 00m

$925

PortlandSingapore

PDX - SIN

PDXSIN

Portland

Sun 9/6

10:50 am-6:15 am

2 stops28h 25m

Singapore Changi

Mon 10/19

8:35 pm-12:59 am

1 stop19h 24m

$929

BoiseSingapore

BOI - SIN

BOISIN

Boise Air Term. Gowen Fld

Tue 10/27

6:15 am-8:15 pm

1 stop24h 00m

Singapore Changi

Thu 10/29

10:10 am-4:59 pm

1 stop20h 49m

$1,156

BoiseSingapore

BOI - SIN

BOISIN

Boise Air Term. Gowen Fld

Thu 8/20

6:15 am-6:35 pm

1 stop22h 20m

Singapore Changi

Mon 8/31

8:45 am-7:24 pm

1 stop24h 39m

$1,156

BoiseSingapore

BOI - SIN

BOISIN

Boise Air Term. Gowen Fld

Wed 9/30

2:14 pm-6:15 am

1 stop26h 01m

Singapore Changi

Wed 10/14

8:45 am-7:29 pm

1 stop24h 44m

$1,156

BoiseSingapore

BOI - SIN

BOISIN

Boise Air Term. Gowen Fld

Wed 9/2

7:05 pm-6:15 am

1 stop21h 10m

Singapore Changi

Sun 9/13

8:45 am-7:19 pm

1 stop24h 34m

$1,156
Quickest round-trip

BoiseSingapore

BOI - SIN

BOISIN

Boise Air Term. Gowen Fld

Sat 9/12

8:05 am-6:35 pm

1 stop20h 30m

Singapore Changi

Sun 9/20

8:45 am-3:31 pm

1 stop20h 46m

$1,156

EugeneSingapore

EUG - SIN

EUGSIN

Eugene

Sun 12/6

12:45 pm-7:00 am

2 stops26h 15m

Singapore Changi

Thu 12/10

8:40 am-11:39 am

2 stops18h 59m

$1,310

EugeneSingapore

EUG - SIN

EUGSIN

Eugene

Mon 10/26

6:15 am-12:10 am

2 stops26h 55m

Singapore Changi

Wed 10/28

10:30 pm-5:13 pm

2 stops33h 43m

$1,633

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/25

Showing 1-10 of 28 resultsSorted by cheapest first
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, August is the cheapest month in which you can book a flight from Oregon to Singapore (average of $209). Flying from Oregon to Singapore in June is currently the most expensive (average of $950). 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.

How far ahead should I book a flight from Oregon to Singapore?

The best time to book flights from Oregon to Singapore is 46 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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.

  • How long is the flight from Oregon to Singapore?

    United Airlines and Korean Air can get you from Oregon to Singapore in just under 26h 55m. Your travel time can differ by up to 1h 05m. There are 8155 mi between Oregon and Singapore. This flight may include one or multiple stops.

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

    $387 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on ANA and Qatar Airways, with prices starting from $420 and $524, 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, August is the cheapest month in which you can book a flight from Oregon to Singapore (average of $209). Flying from Oregon to Singapore in June is currently the most expensive (average of $950). 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
San Francisco to Haneda flights
Newark to Narita flights
Seattle to Narita flights
San Francisco to Narita flights
Los Angeles to Manila flights
John F Kennedy Intl to Suvarnabhumi flights
Seattle to Haneda flights
Los Angeles to Suvarnabhumi flights
Newark to Haneda flights
John F Kennedy Intl to Narita flights
San Francisco to Manila flights
Dallas/Fort Worth to Narita flights
O'Hare Intl to Narita flights
Newark to New Delhi flights
O'Hare Intl to Haneda flights
Newark to Suvarnabhumi flights
Dulles Intl to Haneda flights
LaGuardia to Haneda flights
John F Kennedy Intl to New Delhi flights
Dallas/Fort Worth to Haneda flights
George Bush Intcntl to Haneda flights
John F Kennedy Intl to Mumbai flights
John F Kennedy Intl to Incheon Intl flights
San Francisco to Taiwan Taoyuan Intl flights
Los Angeles to Ho Chi Minh City flights
Ontario to Narita flights
Seattle to Suvarnabhumi flights
San Francisco to New Delhi flights
San Francisco to Suvarnabhumi flights
Boston to Narita flights
San Francisco to Hong Kong flights
Los Angeles to Taiwan Taoyuan Intl flights
San Diego to Narita flights
Dallas/Fort Worth to Suvarnabhumi flights
O'Hare Intl to Suvarnabhumi flights
Dulles Intl to Narita flights
John F Kennedy Intl to Hong Kong flights
Los Angeles to Incheon Intl flights
Hobby to Narita flights
George Bush Intcntl to Narita flights
Honolulu to Narita flights
Denver to Narita flights

Top 3 airlines flying from Oregon to Singapore

Discover the top 3 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 June 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$726Average$1,020FlexibilityNo cancel feeOn-time67%
Singapore AirlinesCheapest$837Average$994FlexibilityNo cancel feeOn-time81%
United AirlinesCheapest$1,024Average$1,324FlexibilityNo cancel feeOn-time69%

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.