$313+ Cheap flights from Portland (PDX) to Singapore (SIN)
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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SIN
May 17 — May 241
Round-trip
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
Cheapest
Best
Last-minute
One-way
Cheapest flights from Portland to SingaporeExplore 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 17, 2026.
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 17, 2026.
This oojo deal was found by Cheapflights users on 4/15. 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 10/72:30 pm
PDX
- SIN
1 stop23h 45m
Singapore Airlines
Thu 10/229:00 am
SIN
- PDX
1 stop18h 22m
Singapore Airlines
Deal found 4/15![Singapore Airlines logo]()
$920
This oojo deal was found by Cheapflights users on 4/16. 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 10/65:40 pm
PDX
- SIN
1 stop23h 00m
Singapore Airlines
Tue 10/279:15 am
SIN
- PDX
1 stop19h 35m
Singapore Airlines
Deal found 4/16![Singapore Airlines logo]()
$940
This Travelocity deal was found by Cheapflights users on 4/16. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/108:19 am
PDX
- SIN
2 stops24h 16m
Multiple Airlines
Thu 9/242:30 pm
SIN
- PDX
2 stops41h 20m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$941
This oojo deal was found by Cheapflights users on 4/15. 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.
Fri 9/186:05 am
PDX
- SIN
1 stop20h 30m
Singapore Airlines
Sat 10/39:15 am
SIN
- PDX
1 stop19h 35m
Singapore Airlines
Deal found 4/15![Singapore Airlines logo]()
$961
This oojo deal was found by Cheapflights users on 4/16. 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 9/62:50 pm
PDX
- SIN
1 stop23h 25m
Singapore Airlines
Fri 9/119:00 am
SIN
- PDX
1 stop25h 50m
Singapore Airlines
Deal found 4/16![Singapore Airlines logo]()
$965
This oojo deal was found by Cheapflights users on 4/14. 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 10/15:35 pm
PDX
- SIN
1 stop23h 05m
Singapore Airlines
Sat 10/109:15 am
SIN
- PDX
1 stop19h 35m
Singapore Airlines
Deal found 4/14![Singapore Airlines logo]()
$983
This oojo deal was found by Cheapflights users on 4/15. 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 10/147:00 am
PDX
- SIN
2 stops26h 55m
Singapore Airlines
Wed 10/219:15 am
SIN
- PDX
1 stop26h 33m
Singapore Airlines
Deal found 4/15![Singapore Airlines logo]()
$997
This oojo deal was found by Cheapflights users on 4/16. 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 5/410:35 am
PDX
- SIN
2 stops31h 45m
Qatar Airways
Sun 5/101:30 am
SIN
- PDX
2 stops32h 06m
Qatar Airways
Deal found 4/16![Qatar Airways logo]()
$1,001
This Cheapflightsfares deal was found by Cheapflights users on 4/14. 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.
Tue 8/1812:03 pm
PDX
- SIN
2 stops29h 47m
Qatar Airways
Wed 9/23:15 am
SIN
- PDX
2 stops31h 35m
Qatar Airways
Deal found 4/14![Qatar Airways logo]()
$1,013
This oojo deal was found by Cheapflights users on 4/14. 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 4/228:45 am
PDX
- SIN
2 stops33h 35m
Qatar Airways
Fri 5/11:05 am
SIN
- PDX
2 stops32h 31m
Qatar Airways
Deal found 4/14![Qatar Airways logo]()
$1,021
Best flights from Portland to SingaporeDiscover carefully curated flight deals from Portland to Singapore that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 17, 2026.
Discover carefully curated flight deals from Portland to Singapore that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 17, 2026.
This Qatar Airways deal was found by Cheapflights users on 4/14. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1712:03 pm
PDX
- SIN
2 stops29h 47m
Qatar Airways
Fri 9/47:40 pm
SIN
- PDX
2 stops36h 09m
Qatar Airways
Deal found 4/14![Qatar Airways logo]()
$1,066
This Singapore Airlines deal was found by Cheapflights users on 4/13. 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.
Thu 10/15:35 pm
PDX
- SIN
1 stop23h 05m
Multiple Airlines
Sat 10/109:15 am
SIN
- PDX
1 stop22h 35m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$1,083
This Cathay Pacific deal was found by Cheapflights users on 4/14. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/175:35 pm
PDX
- SIN
2 stops27h 10m
Cathay Pacific
Mon 9/211:25 pm
SIN
- PDX
2 stops22h 25m
Cathay Pacific
Deal found 4/14![Cathay Pacific logo]()
$1,368
This United Airlines deal was found by Cheapflights users on 4/15. 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 5/185:30 am
PDX
- SIN
1 stop22h 05m
United Airlines
Tue 6/98:45 am
SIN
- PDX
1 stop23h 02m
United Airlines
Deal found 4/15![United Airlines logo]()
$1,626
This Qatar Airways deal was found by Cheapflights users on 4/12. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/312:03 pm
PDX
- SIN
2 stops29h 47m
Qatar Airways
Fri 8/213:15 am
SIN
- PDX
2 stops31h 35m
Qatar Airways
Deal found 4/12![Qatar Airways logo]()
$1,131
This Singapore Airlines deal was found by Cheapflights users on 4/12. 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.
Mon 8/37:19 am
PDX
- SIN
1 stop20h 51m
Multiple Airlines
Sat 8/229:15 am
SIN
- PDX
1 stop26h 35m
Multiple Airlines
Deal found 4/12![Multiple Airlines logo]()
$1,201
This Qatar Airways deal was found by Cheapflights users on 4/14. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/159:19 am
PDX
- SIN
2 stops32h 31m
Qatar Airways
Fri 9/43:15 am
SIN
- PDX
2 stops28h 34m
Qatar Airways
Deal found 4/14![Qatar Airways logo]()
$1,146
This Singapore Airlines deal was found by Cheapflights users on 4/12. 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.
Wed 10/1412:31 pm
PDX
- SIN
1 stop25h 44m
Multiple Airlines
Wed 10/219:25 am
SIN
- PDX
2 stops29h 29m
Multiple Airlines
Deal found 4/12![Multiple Airlines logo]()
$1,241
This oojo deal was found by Cheapflights users on 4/16. 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 9/61:59 pm
PDX
- SIN
2 stops34h 46m
Qatar Airways
Thu 9/103:15 am
SIN
- PDX
2 stops28h 35m
Qatar Airways
Deal found 4/16![Qatar Airways logo]()
$1,149
This Singapore Airlines deal was found by Cheapflights users on 4/12. 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.
Sat 8/155:00 am
PDX
- SIN
1 stop21h 35m
Multiple Airlines
Mon 8/319:15 am
SIN
- PDX
1 stop19h 30m
Multiple Airlines
Deal found 4/12![Multiple Airlines logo]()
$1,242
This China Airlines deal was found by Cheapflights users on 4/12. 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.
Tue 5/125:51 pm
PDX
- SIN
2 stops27h 44m
Multiple Airlines
Wed 5/271:45 pm
SIN
- PDX
2 stops34h 44m
Multiple Airlines
Deal found 4/12![Multiple Airlines logo]()
$1,260
Last-minute flights from Portland to SingaporeDiscover last-minute flight deals from Portland to Singapore. Data last updated April 17, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Singapore. Data last updated April 17, 2026 and is based on user searches.
This FlightHub deal was found by Cheapflights users on 4/13. 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.
Mon 4/201:35 pm
PDX
- SIN
2 stops28h 45m
Qatar Airways
Sun 4/261:05 am
SIN
- PDX
2 stops36h 48m
Qatar Airways
Deal found 4/13![Qatar Airways logo]()
$985
This oojo deal was found by Cheapflights users on 4/14. 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 4/228:45 am
PDX
- SIN
2 stops33h 35m
Qatar Airways
Fri 5/11:05 am
SIN
- PDX
2 stops32h 31m
Qatar Airways
Deal found 4/14![Qatar Airways logo]()
$1,021
This oojo deal was found by Cheapflights users on 4/14. 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 4/228:45 am
PDX
- SIN
2 stops33h 35m
Qatar Airways
Sun 5/37:40 pm
SIN
- PDX
2 stops37h 56m
Qatar Airways
Deal found 4/14![Qatar Airways logo]()
$1,028
This oojo deal was found by Cheapflights users on 4/16. 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 5/410:35 am
PDX
- SIN
2 stops31h 45m
Qatar Airways
Sun 5/101:30 am
SIN
- PDX
2 stops32h 06m
Qatar Airways
Deal found 4/16![Qatar Airways logo]()
$1,001
This FlightHub deal was found by Cheapflights users on 4/16. 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.
Mon 5/187:00 am
PDX
- SIN
2 stops43h 00m
Multiple Airlines
Tue 6/94:55 pm
SIN
- PDX
2 stops38h 52m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$1,092
This Justfly.com deal was found by Cheapflights users on 4/14. 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.
Mon 5/187:15 am
PDX
- SIN
2 stops55h 00m
Air Canada
Tue 6/97:00 am
SIN
- PDX
2 stops42h 20m
Air Canada
Deal found 4/14![Air Canada logo]()
$1,137
This Air Canada deal was found by Cheapflights users on 4/12. 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.
Fri 5/227:45 pm
PDX
- SIN
1 stop18h 30m
Air Canada
Thu 6/47:00 am
SIN
- PDX
1 stop27h 10m
Air Canada
Deal found 4/12![Air Canada logo]()
$1,078
One-way flights from Portland to SingaporeSearch for one-way flight options from Portland to Singapore. Find affordable one-way fares based on user searches. Data last updated April 17, 2026.
Search for one-way flight options from Portland to Singapore. Find affordable one-way fares based on user searches. Data last updated April 17, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/55:37 pm
PDX
- SIN
3 stops52h 38m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$313
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/49:54 am
PDX
- SIN
3 stops36h 21m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$319
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/62:50 pm
PDX
- SIN
3 stops31h 25m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$403
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/310:51 am
PDX
- SIN
2 stops35h 24m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$406
This oojo deal was found by Cheapflights users on 4/15. 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 9/25:35 pm
PDX
- SIN
2 stops24h 30m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$426
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/210:30 am
PDX
- SIN
3 stops56h 45m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$462
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/95:51 pm
PDX
- SIN
2 stops38h 34m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$480
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/72:50 pm
PDX
- SIN
3 stops36h 55m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$520
Find flight deals from Portland to Singapore
Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to Singapore (SIN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $920 (oojo) |
One-way from | $313 (Kiwi.com) |
Popular in | December |
Cheapest in | May |
Average price | $958 |
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 17, 2026.
Use the filters below to find and compare flights from Portland to Singapore that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Mon 8/17
12:03 pm-8:50 am
2 stops29h 47m
Singapore Changi
Fri 9/4
7:40 pm-4:49 pm
2 stops36h 09m
$1,066
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Thu 10/1
5:35 pm-7:40 am
1 stop23h 05m
Singapore Changi
Sat 10/10
9:15 am-4:50 pm
1 stop22h 35m
$1,083
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Mon 8/3
12:03 pm-8:50 am
2 stops29h 47m
Singapore Changi
Fri 8/21
3:15 am-7:50 pm
2 stops31h 35m
$1,131
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Sat 8/15
9:19 am-8:50 am
2 stops32h 31m
Singapore Changi
Fri 9/4
3:15 am-4:49 pm
2 stops28h 34m
$1,146
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Sun 9/6
1:59 pm-3:45 pm
2 stops34h 46m
Singapore Changi
Thu 9/10
3:15 am-4:50 pm
2 stops28h 35m
$1,149
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Mon 8/3
7:19 am-7:10 pm
1 stop20h 51m
Singapore Changi
Sat 8/22
9:15 am-8:50 pm
1 stop26h 35m
$1,201
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Wed 10/14
12:31 pm-5:15 am
1 stop25h 44m
Singapore Changi
Wed 10/21
9:25 am-11:54 pm
2 stops29h 29m
$1,241
Quickest round-trip
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Sat 8/15
5:00 am-5:35 pm
1 stop21h 35m
Singapore Changi
Mon 8/31
9:15 am-1:45 pm
1 stop19h 30m
$1,242
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Tue 5/12
5:51 pm-12:35 pm
2 stops27h 44m
Singapore Changi
Wed 5/27
1:45 pm-9:29 am
2 stops34h 44m
$1,260
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Thu 9/17
5:35 pm-11:45 am
2 stops27h 10m
Singapore Changi
Mon 9/21
1:25 pm-8:50 pm
2 stops22h 25m
$1,368
Showing 1-10 of 20 resultsSorted by cheapest first
Compare providers for flights from Portland to Singapore
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to Singapore in April.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Portland-Singapore flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland-Singapore flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland-Singapore flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Portland-Singapore flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland-Singapore flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
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.
PDX-SIN
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
How far ahead should I book a flight from Portland to Singapore?
Use this chart to determine the optimal time to book a round-trip flight from Portland to Singapore. Price data was last updated on April 10, 2026.
The price you pay for your flight from Portland to Singapore may vary depending on when you book. For the best chance of a lower fare, look to book 8 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Portland to Singapore?
Currently, May is the cheapest month in which you can book a flight from Portland to Singapore (average of $858). Flying from Portland to Singapore in December is currently the most expensive (average of $1,654). 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 much does it cost to fly round-trip from Portland to Singapore?
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 17, 2026.
Get a feel of what it's like to fly with Korean Air,Singapore Airlines, andUnited Airlines from Portland to Singapore by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.7
Overall
8.4
Comfort
8.3
Food
8.1
Boarding
8.5
Entertainment
8.2
Reviews
1 / 20
10.0
ExcellentJacqueline,Aug 2025
ICN - SEA
Crew
8.7
Overall
8.4
Comfort
8.3
Food
8.1
Boarding
8.5
Entertainment
8.2
Reviews
1 / 20
10.0
ExcellentJacqueline,Aug 2025
ICN - SEA
Crew
8.7
Overall
8.4
Comfort
8.3
Food
8.1
Boarding
8.5
Entertainment
8.2
Reviews
1 / 20
10.0
ExcellentJacqueline,Aug 2025
ICN - SEA
Crew
8.7
Overall
8.4
Comfort
8.3
Food
8.1
Boarding
8.5
Entertainment
8.2
Reviews
1 / 20
10.0
ExcellentJacqueline,Aug 2025
ICN - SEA
Crew
8.7
Overall
8.4
Comfort
8.3
Food
8.1
Boarding
8.5
Entertainment
8.2
Reviews
1 / 20
10.0
ExcellentJacqueline,Aug 2025
ICN - SEA
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.
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.
Complete your trip
Flights by cabin class
Other flight options
Other flights from Portland
Popular flights
Singapore flight routes
Complete your trip
Complete your trip to Singapore by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Portland to Singapore by cabin class
Find flights from Portland to Singapore, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Portland and Singapore flights
Browse other Portland and Singapore flight options. Last updated on April 17, 2026.
Other flights from Portland
Browse through other flights departing from Portland. Flights are based on user searches made on Cheapflights and were last updated on April 17, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Singapore
Explore flights to Singapore departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on April 17, 2026.
Top 4 airlines flying from Portland to Singapore
Discover the top 4 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 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$694 | Average$897 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$786 | Average$978 | FlexibilityNo cancel fee | On-time81% | |
| Cheapest$837 | Average$995 | FlexibilityNo cancel fee | On-time81% | |
| Cheapest$1,012 | Average$1,225 | FlexibilityNo cancel fee | On-time69% |