$326+ 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 8/6. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SIN
Apr 16 — Apr 231
Round-trip
1 adult, Economy
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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 March 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 March 17, 2026.
This Philippine Airlines deal was found by Cheapflights users on 3/16. 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 Philippine Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/157:40 pm
PDX
- SIN
2 stops22h 25m
Multiple Airlines
Wed 10/212:30 pm
SIN
- PDX
2 stops24h 40m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$712
This Expedia deal was found by Cheapflights users on 3/16. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/157:40 pm
PDX
- SIN
2 stops22h 25m
Multiple Airlines
Fri 10/232:30 pm
SIN
- PDX
2 stops24h 40m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$792
This oojo deal was found by Cheapflights users on 3/16. 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.
Thu 10/157:00 am
PDX
- SIN
1 stop21h 10m
Singapore Airlines
Wed 10/219:15 am
SIN
- PDX
1 stop22h 35m
Singapore Airlines
Deal found 3/16![Singapore Airlines logo]()
$811
This Expedia deal was found by Cheapflights users on 3/14. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/285:35 pm
PDX
- SIN
2 stops24h 30m
Multiple Airlines
Fri 9/42:30 pm
SIN
- PDX
2 stops24h 45m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$872
This oojo deal was found by Cheapflights users on 3/16. 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.
Thu 10/17:00 am
PDX
- SIN
1 stop21h 10m
Singapore Airlines
Sat 10/109:15 am
SIN
- PDX
1 stop19h 35m
Singapore Airlines
Deal found 3/16![Singapore Airlines logo]()
$894
This FlightHub deal was found by Cheapflights users on 3/17. 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 4/225:51 pm
PDX
- SIN
2 stops59h 19m
Multiple Airlines
Sun 5/311:10 pm
SIN
- PDX
2 stops39h 34m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$904
This oojo deal was found by Cheapflights users on 3/14. 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 4/292:50 pm
PDX
- SIN
1 stop23h 25m
Singapore Airlines
Wed 5/68:45 pm
SIN
- PDX
1 stop27h 53m
Singapore Airlines
Deal found 3/14![Singapore Airlines logo]()
$927
This Singapore Airlines deal was found by Cheapflights users on 3/13. 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 10/17:00 am
PDX
- SIN
1 stop21h 10m
Multiple Airlines
Sat 10/109:00 am
SIN
- PDX
1 stop18h 22m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$932
This Gurufare deal was found by Cheapflights users on 3/12. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/227:15 am
PDX
- SIN
2 stops25h 05m
ANA
Fri 5/112:50 am
SIN
- PDX
2 stops29h 07m
ANA
Deal found 3/12![ANA logo]()
$939
This oojo deal was found by Cheapflights users on 3/17. 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 9/27:00 am
PDX
- SIN
1 stop21h 10m
Singapore Airlines
Fri 9/189:00 am
SIN
- PDX
1 stop22h 37m
Singapore Airlines
Deal found 3/17![Singapore Airlines logo]()
$946
This oojo deal was found by Cheapflights users on 3/13. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/156:19 am
PDX
- SIN
1 stop20h 16m
Singapore Airlines
Mon 8/318:45 pm
SIN
- PDX
1 stop28h 40m
Singapore Airlines
Deal found 3/13![Singapore Airlines logo]()
$948
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 March 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 March 17, 2026.
This Gurufare deal was found by Cheapflights users on 3/12. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/227:15 am
PDX
- SIN
2 stops25h 05m
ANA
Fri 5/112:50 am
SIN
- PDX
2 stops29h 07m
ANA
Deal found 3/12![ANA logo]()
$939
This Singapore Airlines deal was found by Cheapflights users on 3/12. 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 4/227:00 am
PDX
- SIN
1 stop21h 10m
Multiple Airlines
Sun 5/38:45 pm
SIN
- PDX
1 stop27h 53m
Multiple Airlines
Deal found 3/12![Multiple Airlines logo]()
$1,132
This United Airlines deal was found by Cheapflights users on 3/15. 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 stop27h 09m
United Airlines
Deal found 3/15![United Airlines logo]()
$1,154
This United Airlines deal was found by Cheapflights users on 3/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:54 am
PDX
- SIN
1 stop20h 41m
United Airlines
Fri 9/48:35 pm
SIN
- PDX
2 stops31h 28m
United Airlines
Deal found 3/14![United Airlines logo]()
$1,159
This United Airlines deal was found by Cheapflights users on 3/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/291:39 pm
PDX
- SIN
1 stop26h 06m
United Airlines
Wed 5/69:00 am
SIN
- PDX
2 stops23h 44m
United Airlines
Deal found 3/14![United Airlines logo]()
$1,159
This United Airlines deal was found by Cheapflights users on 3/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/227:05 pm
PDX
- SIN
2 stops32h 30m
United Airlines
Sat 5/28:35 pm
SIN
- PDX
1 stop19h 24m
United Airlines
Deal found 3/12![United Airlines logo]()
$1,170
This United Airlines deal was found by Cheapflights users on 3/17. 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.
Sat 5/27:45 pm
PDX
- SIN
1 stop20h 00m
United Airlines
Thu 5/79:00 am
SIN
- PDX
2 stops27h 09m
United Airlines
Deal found 3/17![United Airlines logo]()
$1,209
This United Airlines deal was found by Cheapflights users on 3/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/305:15 am
PDX
- SIN
1 stop22h 20m
United Airlines
Wed 6/108:45 am
SIN
- PDX
1 stop23h 02m
United Airlines
Deal found 3/13![United Airlines logo]()
$1,259
This United Airlines deal was found by Cheapflights users on 3/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/2411:16 am
PDX
- SIN
1 stop40h 19m
United Airlines
Wed 6/38:45 am
SIN
- PDX
1 stop29h 03m
United Airlines
Deal found 3/16![United Airlines logo]()
$1,261
Last-minute flights from Portland to SingaporeDiscover last-minute flight deals from Portland to Singapore. Data last updated March 17, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Singapore. Data last updated March 17, 2026 and is based on user searches.
This Gurufare deal was found by Cheapflights users on 3/13. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/109:30 pm
PDX
- SIN
2 stops40h 55m
Multiple Airlines
Thu 4/1612:55 am
SIN
- PDX
2 stops38h 03m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$1,020
This Gurufare deal was found by Cheapflights users on 3/15. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/145:49 pm
PDX
- SIN
2 stops44h 36m
Multiple Airlines
Tue 4/214:55 pm
SIN
- PDX
2 stops38h 54m
Multiple Airlines
Deal found 3/15![Multiple Airlines logo]()
$1,003
This oojo deal was found by Cheapflights users on 3/17. 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 4/1412:07 pm
PDX
- SIN
2 stops29h 43m
Qatar Airways
Mon 4/203:15 am
SIN
- PDX
2 stops28h 37m
Qatar Airways
Deal found 3/17![Qatar Airways logo]()
$1,026
This FlightHub deal was found by Cheapflights users on 3/17. 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 4/225:51 pm
PDX
- SIN
2 stops59h 19m
Multiple Airlines
Sun 5/311:10 pm
SIN
- PDX
2 stops39h 34m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$904
This Gurufare deal was found by Cheapflights users on 3/12. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/227:15 am
PDX
- SIN
2 stops25h 05m
ANA
Fri 5/112:50 am
SIN
- PDX
2 stops29h 07m
ANA
Deal found 3/12![ANA logo]()
$939
This KAYAK deal was found by Cheapflights users on 3/14. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/222:50 pm
PDX
- SIN
2 stops57h 55m
Multiple Airlines
Fri 5/112:55 am
SIN
- PDX
2 stops29h 43m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$1,035
This oojo deal was found by Cheapflights users on 3/14. 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 4/292:50 pm
PDX
- SIN
1 stop23h 25m
Singapore Airlines
Wed 5/68:45 pm
SIN
- PDX
1 stop27h 53m
Singapore Airlines
Deal found 3/14![Singapore Airlines logo]()
$927
This Gurufare deal was found by Cheapflights users on 3/16. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/307:00 am
PDX
- SIN
2 stops43h 00m
Multiple Airlines
Thu 5/711:10 pm
SIN
- PDX
2 stops39h 34m
Multiple Airlines
Deal found 3/16![Multiple Airlines logo]()
$998
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 March 17, 2026.
Search for one-way flight options from Portland to Singapore. Find affordable one-way fares based on user searches. Data last updated March 17, 2026.
This oojo deal was found by Cheapflights users on 3/17. 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 8/65:30 pm
PDX
- SIN
2 stops24h 35m
Philippine Airlines
Deal found 3/17![Philippine Airlines logo]()
$326
This Kiwi.com deal was found by Cheapflights users on 3/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/141:35 pm
PDX
- SIN
2 stops40h 55m
Multiple Airlines
Deal found 3/12![Multiple Airlines logo]()
$442
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/131:35 pm
PDX
- SIN
2 stops40h 55m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$459
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 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 stops59h 26m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$497
This Air Canada deal was found by Cheapflights users on 3/13. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/610:10 am
PDX
- SIN
1 stop28h 05m
Air Canada
Deal found 3/13![Air Canada logo]()
$546
This Expedia deal was found by Cheapflights users on 3/12. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/153:30 pm
PDX
- SIN
1 stop22h 45m
Air Canada
Deal found 3/12![Air Canada logo]()
$584
This Air Canada deal was found by Cheapflights users on 3/17. 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.
Sun 3/299:50 am
PDX
- SIN
1 stop28h 25m
Air Canada
Deal found 3/17![Air Canada logo]()
$586
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 March 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $872 (Expedia) |
One-way from | $326 (oojo) |
Popular in | December |
Cheapest in | May |
Average price | $978 |
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 March 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
Wed 4/22
7:15 am-11:20 pm
2 stops25h 05m
Singapore Changi
Fri 5/1
12:50 am-2:57 pm
2 stops29h 07m
$939
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Wed 4/22
7:00 am-7:10 pm
1 stop21h 10m
Singapore Changi
Sun 5/3
8:45 pm-9:38 am
1 stop27h 53m
$1,132
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Mon 5/18
5:30 am-6:35 pm
1 stop22h 05m
Singapore Changi
Tue 6/9
8:45 am-8:54 pm
1 stop27h 09m
$1,154
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Fri 8/28
6:54 am-6:35 pm
1 stop20h 41m
Singapore Changi
Fri 9/4
8:35 pm-1:03 pm
2 stops31h 28m
$1,159
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Wed 4/29
1:39 pm-6:45 am
1 stop26h 06m
Singapore Changi
Wed 5/6
9:00 am-5:44 pm
2 stops23h 44m
$1,159
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Wed 4/22
7:05 pm-6:35 pm
2 stops32h 30m
Singapore Changi
Sat 5/2
8:35 pm-12:59 am
1 stop19h 24m
$1,170
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Sat 5/2
7:45 pm-6:45 am
1 stop20h 00m
Singapore Changi
Thu 5/7
9:00 am-9:09 pm
2 stops27h 09m
$1,209
Quickest round-trip
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Sat 5/30
5:15 am-6:35 pm
1 stop22h 20m
Singapore Changi
Wed 6/10
8:45 am-4:47 pm
1 stop23h 02m
$1,259
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Sun 5/24
11:16 am-6:35 pm
1 stop40h 19m
Singapore Changi
Wed 6/3
8:45 am-10:48 pm
1 stop29h 03m
$1,261
Cheapest one-way
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Mon 5/4
9:54 am-12:20 pm
3 stops59h 26m
$497
Showing 1-10 of 17 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 March.
| 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 March 13, 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, September is the cheapest month in which you can book a flight from Portland to Singapore (average of $693). Flying from Portland to Singapore in July is currently the most expensive (average of $883). 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 March 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.
Food
8.1
Boarding
8.5
Comfort
8.3
Overall
8.4
Crew
8.7
Entertainment
8.2
Reviews
1 / 20
10.0
ExcellentJacqueline,Aug 2025
ICN - SEA
Food
8.1
Boarding
8.5
Comfort
8.3
Overall
8.4
Crew
8.7
Entertainment
8.2
Reviews
1 / 20
10.0
ExcellentJacqueline,Aug 2025
ICN - SEA
Food
8.1
Boarding
8.5
Comfort
8.3
Overall
8.4
Crew
8.7
Entertainment
8.2
Reviews
1 / 20
10.0
ExcellentJacqueline,Aug 2025
ICN - SEA
Food
8.1
Boarding
8.5
Comfort
8.3
Overall
8.4
Crew
8.7
Entertainment
8.2
Reviews
1 / 20
10.0
ExcellentJacqueline,Aug 2025
ICN - SEA
Food
8.1
Boarding
8.5
Comfort
8.3
Overall
8.4
Crew
8.7
Entertainment
8.2
Reviews
1 / 20
10.0
ExcellentJacqueline,Aug 2025
ICN - SEA
Related info for your journey
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Portland and Singapore flights
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Other flights from Portland
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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 March 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$694 | Average$870 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$786 | Average$978 | FlexibilityNo cancel fee | On-time81% | |
| Cheapest$837 | Average$1,003 | FlexibilityNo cancel fee | On-time81% | |
| Cheapest$915 | Average$1,130 | FlexibilityNo cancel fee | On-time69% |