$524+ 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
Jun 24 — Jul 11
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 May 25, 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 May 25, 2026.
This oojo deal was found by Cheapflights users on 5/22. 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 10/276:06 am
PDX
- SIN
1 stop20h 39m
Singapore Airlines
Thu 11/129:15 am
SIN
- PDX
1 stop27h 35m
Singapore Airlines
Deal found 5/22![Singapore Airlines logo]()
$944
This oojo deal was found by Cheapflights users on 5/24. 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.
Fri 9/186:20 am
PDX
- SIN
1 stop20h 15m
Singapore Airlines
Sat 10/39:00 am
SIN
- PDX
1 stop23h 00m
Singapore Airlines
Deal found 5/24![Singapore Airlines logo]()
$950
This Justfly.com deal was found by Cheapflights users on 5/22. 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.
Tue 8/113:30 pm
PDX
- SIN
1 stop22h 45m
Air Canada
Thu 8/207:00 am
SIN
- PDX
1 stop27h 11m
Air Canada
Deal found 5/22![Air Canada logo]()
$952
This Air Canada deal was found by Cheapflights users on 5/20. 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.
Tue 10/67:45 pm
PDX
- SIN
1 stop18h 30m
Air Canada
Tue 12/158:50 am
SIN
- PDX
1 stop16h 36m
Air Canada
Deal found 5/20![Air Canada logo]()
$972
This FlightHub deal was found by Cheapflights users on 5/21. 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 12/17:00 am
PDX
- SIN
1 stop32h 00m
Air Canada
Fri 12/188:50 am
SIN
- PDX
1 stop16h 36m
Air Canada
Deal found 5/21![Air Canada logo]()
$983
This oojo deal was found by Cheapflights users on 5/20. 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 9/256:20 am
PDX
- SIN
1 stop20h 15m
Singapore Airlines
Wed 10/79:05 am
SIN
- PDX
1 stop22h 40m
Singapore Airlines
Deal found 5/20![Singapore Airlines logo]()
$989
This oojo deal was found by Cheapflights users on 5/20. 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 9/35:07 am
PDX
- SIN
1 stop21h 28m
Singapore Airlines
Thu 9/109:00 am
SIN
- PDX
1 stop19h 39m
Singapore Airlines
Deal found 5/20![Singapore Airlines logo]()
$992
This Kiwi.com deal was found by Cheapflights users on 5/24. 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 9/57:03 am
PDX
- SIN
1 stop21h 07m
Multiple Airlines
Sat 9/199:05 am
SIN
- PDX
1 stop19h 45m
Multiple Airlines
Deal found 5/24![Multiple Airlines logo]()
$1,000
This Air Canada deal was found by Cheapflights users on 5/20. 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.
Tue 10/63:30 pm
PDX
- SIN
1 stop22h 45m
Air Canada
Sat 12/128:50 am
SIN
- PDX
1 stop16h 36m
Air Canada
Deal found 5/20![Air Canada logo]()
$1,006
This FlightHub deal was found by Cheapflights users on 5/20. 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 9/311:48 am
PDX
- SIN
2 stops36h 57m
Qatar Airways
Thu 9/107:40 pm
SIN
- PDX
2 stops36h 10m
Qatar Airways
Deal found 5/20![Qatar Airways logo]()
$1,007
This Justfly.com deal was found by Cheapflights users on 5/20. 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.
Fri 10/97:45 pm
PDX
- SIN
1 stop18h 30m
Air Canada
Sun 12/138:50 am
SIN
- PDX
1 stop16h 36m
Air Canada
Deal found 5/20![Air Canada logo]()
$1,015
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 May 25, 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 May 25, 2026.
This oojo deal was found by Cheapflights users on 5/24. 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.
Mon 8/177:19 am
PDX
- SIN
1 stop20h 51m
Singapore Airlines
Tue 9/19:05 am
SIN
- PDX
1 stop19h 41m
Singapore Airlines
Deal found 5/24![Singapore Airlines logo]()
$1,080
This Qatar Airways deal was found by Cheapflights users on 5/22. 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.
Sun 10/259:28 am
PDX
- SIN
2 stops32h 17m
Qatar Airways
Tue 11/108:15 pm
SIN
- PDX
2 stops35h 10m
Qatar Airways
Deal found 5/22![Qatar Airways logo]()
$1,086
This United Airlines deal was found by Cheapflights users on 5/20. 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 9/37:00 am
PDX
- SIN
1 stop20h 35m
United Airlines
Thu 9/106:15 am
SIN
- PDX
2 stops29h 44m
United Airlines
Deal found 5/20![United Airlines logo]()
$1,158
This Korean Air deal was found by Cheapflights users on 5/22. 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.
Sun 10/259:40 am
PDX
- SIN
2 stops23h 30m
Korean Air
Sat 11/141:35 am
SIN
- PDX
2 stops27h 43m
Korean Air
Deal found 5/22![Korean Air logo]()
$1,165
This Qatar Airways deal was found by Cheapflights users on 5/20. 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.
Tue 10/69:28 am
PDX
- SIN
2 stops32h 22m
Qatar Airways
Thu 12/103:15 am
SIN
- PDX
2 stops31h 18m
Qatar Airways
Deal found 5/20![Qatar Airways logo]()
$1,086
This United Airlines deal was found by Cheapflights users on 5/24. 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.
Mon 8/173:43 pm
PDX
- SIN
1 stop35h 52m
United Airlines
Tue 9/111:05 am
SIN
- PDX
2 stops42h 42m
United Airlines
Deal found 5/24![United Airlines logo]()
$1,162
This FlightHub deal was found by Cheapflights users on 5/24. 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.
Mon 8/1712:03 pm
PDX
- SIN
2 stops36h 42m
Qatar Airways
Tue 9/17:40 pm
SIN
- PDX
2 stops39h 10m
Qatar Airways
Deal found 5/24![Qatar Airways logo]()
$1,105
This United Airlines deal was found by Cheapflights users on 5/22. 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 10/267:30 am
PDX
- SIN
1 stop21h 45m
United Airlines
Wed 11/1110:20 pm
SIN
- PDX
1 stop18h 34m
United Airlines
Deal found 5/22![United Airlines logo]()
$1,205
This United Airlines deal was found by Cheapflights users on 5/24. 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.
Mon 9/77:00 am
PDX
- SIN
1 stop20h 35m
United Airlines
Thu 9/248:45 am
SIN
- PDX
2 stops39h 46m
United Airlines
Deal found 5/24![United Airlines logo]()
$1,210
This United Airlines deal was found by Cheapflights users on 5/22. 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 8/314:07 pm
PDX
- SIN
2 stops35h 28m
United Airlines
Thu 9/38:45 am
SIN
- PDX
1 stop27h 14m
United Airlines
Deal found 5/22![United Airlines logo]()
$1,210
Last-minute flights from Portland to SingaporeDiscover last-minute flight deals from Portland to Singapore. Data last updated May 25, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Singapore. Data last updated May 25, 2026 and is based on user searches.
This Travelocity deal was found by Cheapflights users on 5/24. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/257:45 pm
PDX
- SIN
2 stops26h 30m
Multiple Airlines
Mon 6/12:30 pm
SIN
- PDX
2 stops33h 59m
Multiple Airlines
Deal found 5/24![Multiple Airlines logo]()
$1,379
This Orbitz deal was found by Cheapflights users on 5/24. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/297:45 pm
PDX
- SIN
2 stops26h 30m
Multiple Airlines
Mon 6/12:30 pm
SIN
- PDX
2 stops33h 59m
Multiple Airlines
Deal found 5/24![Multiple Airlines logo]()
$1,494
This Mytrip deal was found by Cheapflights users on 5/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/210:10 am
PDX
- SIN
2 stops34h 35m
Multiple Airlines
Sat 6/66:00 pm
SIN
- PDX
3 stops34h 50m
Multiple Airlines
Deal found 5/20![Multiple Airlines logo]()
$1,456
This Expedia deal was found by Cheapflights users on 5/20. 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.
Tue 6/27:45 pm
PDX
- SIN
1 stop18h 30m
Air Canada
Sat 6/67:00 am
SIN
- PDX
1 stop17h 30m
Air Canada
Deal found 5/20![Air Canada logo]()
$1,461
This Mytrip deal was found by Cheapflights users on 5/22. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/37:45 pm
PDX
- SIN
2 stops32h 10m
Multiple Airlines
Wed 6/1710:50 pm
SIN
- PDX
2 stops35h 21m
Multiple Airlines
Deal found 5/22![Multiple Airlines logo]()
$1,362
This FlightHub deal was found by Cheapflights users on 5/22. 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.
Sun 6/219:19 am
PDX
- SIN
2 stops44h 56m
Qatar Airways
Sat 6/273:15 am
SIN
- PDX
2 stops35h 15m
Qatar Airways
Deal found 5/22![Qatar Airways logo]()
$1,353
This Mytrip deal was found by Cheapflights users on 5/23. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/212:30 pm
PDX
- SIN
3 stops31h 45m
Multiple Airlines
Sun 6/281:10 pm
SIN
- PDX
2 stops32h 05m
Multiple Airlines
Deal found 5/23![Multiple Airlines logo]()
$1,508
This Air Canada deal was found by Cheapflights users on 5/23. 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.
Sun 6/213:30 pm
PDX
- SIN
1 stop22h 45m
Air Canada
Sun 6/287:00 am
SIN
- PDX
1 stop27h 11m
Air Canada
Deal found 5/23![Air Canada logo]()
$1,519
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 May 25, 2026.
Search for one-way flight options from Portland to Singapore. Find affordable one-way fares based on user searches. Data last updated May 25, 2026.
This FlightHub deal was found by Cheapflights users on 5/24. 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 8/66:19 am
PDX
- SIN
2 stops47h 56m
Qatar Airways
Deal found 5/24![Qatar Airways logo]()
$524
This Justfly.com deal was found by Cheapflights users on 5/23. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/119:19 am
PDX
- SIN
2 stops44h 56m
Qatar Airways
Deal found 5/23![Qatar Airways logo]()
$606
This deal was found by Cheapflights users on 5/20. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/217:45 pm
PDX
- SIN
1 stop18h 30m
Air Canada
Deal found 5/20![Air Canada logo]()
$609
This Justfly.com deal was found by Cheapflights users on 5/23. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/32:39 pm
PDX
- SIN
2 stops44h 46m
Multiple Airlines
Deal found 5/23![Multiple Airlines logo]()
$623
This Air Canada deal was found by Cheapflights users on 5/24. 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.
Thu 8/67:45 pm
PDX
- SIN
1 stop18h 30m
Air Canada
Deal found 5/24![Air Canada logo]()
$654
This Mytrip deal was found by Cheapflights users on 5/23. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/112:30 pm
PDX
- SIN
3 stops31h 45m
Multiple Airlines
Deal found 5/23![Multiple Airlines logo]()
$670
This FlightHub deal was found by Cheapflights users on 5/23. 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.
Fri 7/109:19 am
PDX
- SIN
2 stops32h 31m
Qatar Airways
Deal found 5/23![Qatar Airways logo]()
$699
This Kiwi.com deal was found by Cheapflights users on 5/23. 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.
Fri 7/1010:45 am
PDX
- SIN
3 stops47h 20m
Multiple Airlines
Deal found 5/23![Multiple Airlines logo]()
$755
This FlightHub deal was found by Cheapflights users on 5/23. 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.
Thu 6/259:19 am
PDX
- SIN
2 stops48h 16m
Multiple Airlines
Deal found 5/23![Multiple Airlines logo]()
$854
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 May 25, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $944 (oojo) |
One-way from | $524 (Justfly.com) |
Popular in | December |
Cheapest in | January |
Average price | $913 |
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 May 25, 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
7:19 am-7:10 pm
1 stop20h 51m
Singapore Changi
Tue 9/1
9:05 am-1:46 pm
1 stop19h 41m
$1,080
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Sun 10/25
9:28 am-8:45 am
2 stops32h 17m
Singapore Changi
Tue 11/10
8:15 pm-3:25 pm
2 stops35h 10m
$1,086
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Tue 10/6
9:28 am-8:50 am
2 stops32h 22m
Singapore Changi
Thu 12/10
3:15 am-6:33 pm
2 stops31h 18m
$1,086
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Mon 8/17
12:03 pm-3:45 pm
2 stops36h 42m
Singapore Changi
Tue 9/1
7:40 pm-7:50 pm
2 stops39h 10m
$1,105
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Thu 9/3
7:00 am-6:35 pm
1 stop20h 35m
Singapore Changi
Thu 9/10
6:15 am-8:59 pm
2 stops29h 44m
$1,158
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Mon 8/17
3:43 pm-6:35 pm
1 stop35h 52m
Singapore Changi
Tue 9/1
11:05 am-2:47 pm
2 stops42h 42m
$1,162
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Sun 10/25
9:40 am-12:10 am
2 stops23h 30m
Singapore Changi
Sat 11/14
1:35 am-1:18 pm
2 stops27h 43m
$1,165
Quickest round-trip
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Mon 10/26
7:30 am-8:15 pm
1 stop21h 45m
Singapore Changi
Wed 11/11
10:20 pm-12:54 am
1 stop18h 34m
$1,205
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Mon 9/7
7:00 am-6:35 pm
1 stop20h 35m
Singapore Changi
Thu 9/24
8:45 am-9:31 am
2 stops39h 46m
$1,210
PortlandSingapore
PDX - SIN
PDXSIN
Portland
Mon 8/31
4:07 pm-6:35 pm
2 stops35h 28m
Singapore Changi
Thu 9/3
8:45 am-8:59 pm
1 stop27h 14m
$1,210
Showing 1-10 of 15 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, 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 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 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 54 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 May 25, 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.
Boarding
8.3
Entertainment
8.0
Crew
8.6
Comfort
8.0
Food
7.8
Overall
8.2
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SYD - SIN
Boarding
8.3
Entertainment
8.0
Crew
8.6
Comfort
8.0
Food
7.8
Overall
8.2
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SYD - SIN
Boarding
8.3
Entertainment
8.0
Crew
8.6
Comfort
8.0
Food
7.8
Overall
8.2
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SYD - SIN
Boarding
8.3
Entertainment
8.0
Crew
8.6
Comfort
8.0
Food
7.8
Overall
8.2
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SYD - 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 May 25, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$694 | Average$934 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$837 | Average$1,000 | FlexibilityNo cancel fee | On-time81% | |
| Cheapest$1,024 | Average$1,312 | FlexibilityNo cancel fee | On-time69% |