$415+ Cheap flights from Portland (PDX) 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 8/6. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SIN
Aug 27 — Sep 31
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
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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 July 28, 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 July 28, 2026.
This FlightHub deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/33:15 pm
PDX
- SIN
1 stop23h 45m
Air Canada
Tue 11/178:40 am
SIN
- PDX
1 stop16h 46m
Air Canada
Deal found 7/26![Air Canada logo]()
$918
This Justfly.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/110:10 am
PDX
- SIN
1 stop28h 05m
Air Canada
Sat 10/107:00 am
SIN
- PDX
1 stop22h 51m
Air Canada
Deal found 7/26![Air Canada logo]()
$949
This FlightHub deal was found by Cheapflights users on 7/23. 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 8/177:19 am
PDX
- SIN
2 stops30h 56m
Multiple Airlines
Tue 9/14:55 pm
SIN
- PDX
2 stops38h 41m
Multiple Airlines
Deal found 7/23![Multiple Airlines logo]()
$965
This Air Canada deal was found by Cheapflights users on 7/25. 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.
Wed 12/27:10 pm
PDX
- SIN
1 stop19h 50m
Air Canada
Fri 12/188:40 am
SIN
- PDX
1 stop28h 06m
Air Canada
Deal found 7/25![Air Canada logo]()
$970
This Gotogate deal was found by Cheapflights users on 7/27. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2710:10 am
PDX
- SIN
1 stop28h 05m
Air Canada
Thu 9/108:50 pm
SIN
- PDX
2 stops27h 41m
Air Canada
Deal found 7/27![Air Canada logo]()
$980
This Justfly.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/810:00 am
PDX
- SIN
1 stop29h 00m
Air Canada
Sun 11/298:40 am
SIN
- PDX
1 stop28h 06m
Air Canada
Deal found 7/26![Air Canada logo]()
$981
This Gotogate deal was found by Cheapflights users on 7/24. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/810:10 am
PDX
- SIN
1 stop28h 05m
Air Canada
Tue 9/158:50 pm
SIN
- PDX
2 stops32h 56m
Air Canada
Deal found 7/24![Air Canada logo]()
$984
This CheapTickets deal was found by Cheapflights users on 7/24. 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 CheapTickets is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/77:03 am
PDX
- SIN
2 stops25h 17m
Multiple Airlines
Mon 9/146:15 am
SIN
- PDX
2 stops25h 35m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$987
This Gotogate deal was found by Cheapflights users on 7/24. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/117:03 am
PDX
- SIN
2 stops28h 22m
Multiple Airlines
Wed 9/1612:55 am
SIN
- PDX
2 stops36h 00m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$991
This Air Canada deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/43:30 pm
PDX
- SIN
1 stop22h 45m
Air Canada
Sat 9/127:00 am
SIN
- PDX
1 stop27h 11m
Air Canada
Deal found 7/27![Air Canada logo]()
$993
This Gotogate deal was found by Cheapflights users on 7/28. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/46:53 pm
PDX
- SIN
2 stops40h 32m
Multiple Airlines
Tue 9/156:25 pm
SIN
- PDX
2 stops37h 11m
Multiple Airlines
Deal found 7/28![Multiple Airlines logo]()
$996
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 July 28, 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 July 28, 2026.
This Korean Air deal was found by Cheapflights users on 7/27. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/215:10 pm
PDX
- SIN
2 stops35h 15m
Korean Air
Wed 2/101:35 am
SIN
- PDX
2 stops30h 38m
Korean Air
Deal found 7/27![Korean Air logo]()
$1,010
This United Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/277:00 am
PDX
- SIN
1 stop20h 35m
United Airlines
Thu 9/108:35 pm
SIN
- PDX
1 stop28h 36m
United Airlines
Deal found 7/27![United Airlines logo]()
$1,134
This United Airlines deal was found by Cheapflights users on 7/28. 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.
Fri 9/49:00 am
PDX
- SIN
1 stop30h 15m
United Airlines
Tue 9/158:35 pm
SIN
- PDX
1 stop28h 36m
United Airlines
Deal found 7/28![United Airlines logo]()
$1,146
This Korean Air deal was found by Cheapflights users on 7/27. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/27:00 am
PDX
- SIN
2 stops25h 10m
Korean Air
Fri 12/1810:40 am
SIN
- PDX
2 stops41h 03m
Korean Air
Deal found 7/27![Korean Air logo]()
$1,165
This United Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/173:43 pm
PDX
- SIN
1 stop23h 32m
United Airlines
Tue 9/18:45 am
SIN
- PDX
1 stop24h 34m
United Airlines
Deal found 7/27![United Airlines logo]()
$1,146
This United Airlines deal was found by Cheapflights users on 7/28. 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 10/1210:56 am
PDX
- SIN
1 stop28h 19m
United Airlines
Mon 10/2610:10 am
SIN
- PDX
2 stops26h 03m
United Airlines
Deal found 7/28![United Airlines logo]()
$1,150
This United Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2610:43 am
PDX
- SIN
2 stops28h 32m
United Airlines
Mon 10/58:45 am
SIN
- PDX
1 stop27h 15m
United Airlines
Deal found 7/27![United Airlines logo]()
$1,150
This United Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/157:00 am
PDX
- SIN
2 stops26h 45m
United Airlines
Mon 8/318:45 am
SIN
- PDX
1 stop29h 00m
United Airlines
Deal found 7/26![United Airlines logo]()
$1,158
Last-minute flights from Portland to SingaporeDiscover last-minute flight deals from Portland to Singapore. Data last updated July 28, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Singapore. Data last updated July 28, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 7/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/153:25 pm
PDX
- SIN
2 stops41h 30m
Delta
Mon 8/3110:00 pm
SIN
- PDX
2 stops36h 44m
Delta
Deal found 7/28![Delta logo]()
$1,101
This FlightHub deal was found by Cheapflights users on 7/23. 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 8/177:19 am
PDX
- SIN
2 stops30h 56m
Multiple Airlines
Tue 9/14:55 pm
SIN
- PDX
2 stops38h 41m
Multiple Airlines
Deal found 7/23![Multiple Airlines logo]()
$965
This Air Canada deal was found by Cheapflights users on 7/24. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/177:45 pm
PDX
- SIN
2 stops27h 45m
Air Canada
Tue 9/18:50 pm
SIN
- PDX
2 stops33h 01m
Air Canada
Deal found 7/24![Air Canada logo]()
$1,066
This Delta deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/175:30 am
PDX
- SIN
2 stops32h 30m
Delta
Tue 9/17:30 am
SIN
- PDX
2 stops24h 44m
Delta
Deal found 7/27![Delta logo]()
$1,082
This Qatar Airways deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/179:19 am
PDX
- SIN
2 stops39h 26m
Qatar Airways
Mon 8/313:15 am
SIN
- PDX
2 stops30h 22m
Qatar Airways
Deal found 7/26![Qatar Airways logo]()
$1,124
This United Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/173:43 pm
PDX
- SIN
1 stop23h 32m
United Airlines
Tue 9/18:45 am
SIN
- PDX
1 stop24h 34m
United Airlines
Deal found 7/27![United Airlines logo]()
$1,146
This FlightHub deal was found by Cheapflights users on 7/24. 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.
Fri 8/213:30 pm
PDX
- SIN
1 stop22h 45m
Air Canada
Fri 8/2810:50 pm
SIN
- PDX
2 stops35h 21m
Air Canada
Deal found 7/24![Air Canada logo]()
$1,077
This SmartFares deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/249:35 pm
PDX
- SIN
2 stops23h 50m
Multiple Airlines
Mon 8/311:25 pm
SIN
- PDX
2 stops34h 42m
Multiple Airlines
Deal found 7/26![Multiple Airlines logo]()
$1,107
This Gotogate deal was found by Cheapflights users on 7/27. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2710:10 am
PDX
- SIN
1 stop28h 05m
Air Canada
Thu 9/108:50 pm
SIN
- PDX
2 stops27h 41m
Air Canada
Deal found 7/27![Air Canada logo]()
$980
This Gotogate deal was found by Cheapflights users on 7/27. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2711:48 am
PDX
- SIN
2 stops36h 57m
Qatar Airways
Wed 9/93:15 am
SIN
- PDX
2 stops31h 35m
Qatar Airways
Deal found 7/27![Qatar Airways logo]()
$1,020
This United Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/277:00 am
PDX
- SIN
1 stop20h 35m
United Airlines
Thu 9/108:35 pm
SIN
- PDX
1 stop28h 36m
United Airlines
Deal found 7/27![United Airlines logo]()
$1,134
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 July 28, 2026.
Search for one-way flight options from Portland to Singapore. Find affordable one-way fares based on user searches. Data last updated July 28, 2026.
This oojo deal was found by Cheapflights users on 7/24. 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 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 7/24![Philippine Airlines logo]()
$415
This Flightnetwork deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/67:45 pm
PDX
- SIN
1 stop18h 30m
Air Canada
Deal found 7/26![Air Canada logo]()
$421
This Air Canada deal was found by Cheapflights users on 7/23. 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.
Wed 10/287:10 pm
PDX
- SIN
1 stop20h 50m
Air Canada
Deal found 7/23![Air Canada logo]()
$434
This Justfly.com deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/910:10 am
PDX
- SIN
1 stop28h 05m
Air Canada
Deal found 7/26![Air Canada logo]()
$478
This Kiwi.com deal was found by Cheapflights users on 7/23. 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 10/287:30 am
PDX
- SIN
2 stops47h 25m
Multiple Airlines
Deal found 7/23![Multiple Airlines logo]()
$482
This Kiwi.com deal was found by Cheapflights users on 7/23. 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 11/32:45 pm
PDX
- SIN
2 stops39h 10m
Multiple Airlines
Deal found 7/23![Multiple Airlines logo]()
$489
This Kiwi.com deal was found by Cheapflights users on 7/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/16:53 pm
PDX
- SIN
2 stops35h 37m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$504
This Kiwi.com deal was found by Cheapflights users on 7/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/95:55 pm
PDX
- SIN
2 stops45h 00m
Multiple Airlines
Deal found 7/24![Multiple Airlines logo]()
$510
This Kiwi.com deal was found by Cheapflights users on 7/25. 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 9/26:53 pm
PDX
- SIN
2 stops38h 02m
Multiple Airlines
Deal found 7/25![Multiple Airlines logo]()
$513
Find flight deals from Portland to Singapore
Keep the following information in mind while searching for Portland to Singapore flight deals. Data was last updated July 28, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $918 (FlightHub) |
One-way from | $415 (oojo) |
Popular in | December |
Cheapest in | January |
Average price | $1,098 |
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 July 28, 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
Thu 1/21
5:10 pm-8:25 pm
2 stops35h 15m
Singapore Changi
Wed 2/10
1:35 am-4:13 pm
2 stops30h 38m
$1,010
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Thu 8/27
7:00 am-6:35 pm
1 stop20h 35m
Singapore Changi
Thu 9/10
8:35 pm-10:11 am
1 stop28h 36m
$1,134
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Fri 9/4
9:00 am-6:15 am
1 stop30h 15m
Singapore Changi
Tue 9/15
8:35 pm-10:11 am
1 stop28h 36m
$1,146
Quickest round-trip
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Mon 8/17
3:43 pm-6:15 am
1 stop23h 32m
Singapore Changi
Tue 9/1
8:45 am-6:19 pm
1 stop24h 34m
$1,146
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Mon 10/12
10:56 am-6:15 am
1 stop28h 19m
Singapore Changi
Mon 10/26
10:10 am-9:13 pm
2 stops26h 03m
$1,150
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Sat 9/26
10:43 am-6:15 am
2 stops28h 32m
Singapore Changi
Mon 10/5
8:45 am-9:00 pm
1 stop27h 15m
$1,150
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Sat 8/15
7:00 am-12:45 am
2 stops26h 45m
Singapore Changi
Mon 8/31
8:45 am-10:45 pm
1 stop29h 00m
$1,158
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Wed 12/2
7:00 am-12:10 am
2 stops25h 10m
Singapore Changi
Fri 12/18
10:40 am-11:43 am
2 stops41h 03m
$1,165
Cheapest one-way
Quickest one-way
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Thu 8/6
7:45 pm-5:15 am
1 stop18h 30m
$424
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Sun 8/9
10:10 am-5:15 am
1 stop28h 05m
$478
Showing 1-10 of 17 resultsSorted by cheapest first
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
PDX-SG0
PDX-SIN
What is the cheapest month to book a flight from Portland to Singapore?
Currently, January is the cheapest month in which you can book a flight from Portland to Singapore (average of $891). Flying from Portland to Singapore in December is currently the most expensive (average of $1,768). 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 Portland to Singapore?
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 49 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
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 July 28, 2026.
Read reviews from past customers who have flown Singapore Airlines,United Airlines, andAir Canada from Portland to Singapore. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
8.1
Overall
8.2
Boarding
8.3
Crew
8.6
Food
7.8
Comfort
8.0
Reviews
1 / 20
2.0
MediocreKetan,Nov 2024
SEA - SIN
Entertainment
8.1
Overall
8.2
Boarding
8.3
Crew
8.6
Food
7.8
Comfort
8.0
Reviews
1 / 20
2.0
MediocreKetan,Nov 2024
SEA - SIN
Entertainment
8.1
Overall
8.2
Boarding
8.3
Crew
8.6
Food
7.8
Comfort
8.0
Reviews
1 / 20
2.0
MediocreKetan,Nov 2024
SEA - SIN
Entertainment
8.1
Overall
8.2
Boarding
8.3
Crew
8.6
Food
7.8
Comfort
8.0
Reviews
1 / 20
2.0
MediocreKetan,Nov 2024
SEA - SIN
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Top 3 airlines flying from Portland to Singapore
Discover the top 3 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 July 28, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$719 | Average$995 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$789 | Average$996 | FlexibilityNo cancel fee | On-time81% | |
| Cheapest$1,024 | Average$1,201 | FlexibilityNo cancel fee | On-time69% |