$449 Find Cheap Flights from Portland to Singapore

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Portland to Singapore departing on 8/20. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Book Cheap Portland to Singapore Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Portland to Singapore that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Portland to Singapore

Mon, Oct 5 - Tue, Oct 20
Singapore Airlines Logo
2:34 pm - 7:40 am
PDX
-
SIN
26h 06m
1 stop
Singapore Airlines Logo
9:00 am - 5:00 pm
SIN
-
PDX
23h 00m
1 stop
$976Singapore Airlines
Thu, Sep 3 - Thu, Sep 10
Singapore Airlines Logo
5:10 am - 5:35 pm
PDX
-
SIN
21h 25m
1 stop
Singapore Airlines Logo
9:00 am - 4:50 pm
SIN
-
PDX
22h 50m
1 stop
$992Singapore Airlines
Thu, Oct 15 - Mon, Oct 19
Singapore Airlines Logo
6:00 pm - 7:40 am
PDX
-
SIN
22h 40m
1 stop
Singapore Airlines Logo
9:15 am - 8:50 pm
SIN
-
PDX
26h 35m
1 stop
$996Singapore Airlines
Thu, Sep 3 - Wed, Sep 9
Qatar Airways Logo
11:45 am - 3:45 pm
PDX
-
SIN
37h 00m
2 stops
Qatar Airways Logo
3:15 am - 4:50 pm
SIN
-
PDX
28h 35m
2 stops
$1,007Qatar Airways
Thu, Sep 3 - Fri, Sep 11
Qatar Airways Logo
8:10 am - 9:15 pm
PDX
-
SIN
46h 05m
2 stops
Qatar Airways Logo
7:40 pm - 7:50 pm
SIN
-
PDX
39h 10m
2 stops
$1,010Qatar Airways
Thu, Sep 3 - Thu, Sep 10
Qatar Airways Logo
11:45 am - 3:45 pm
PDX
-
SIN
37h 00m
2 stops
Qatar Airways Logo
7:40 pm - 4:50 pm
SIN
-
PDX
36h 10m
2 stops
$1,014Qatar Airways
Sun, Oct 11 - Sun, Oct 18
Singapore Airlines Logo
5:00 pm - 7:40 am
PDX
-
SIN
23h 40m
1 stop
Singapore Airlines Logo
9:00 am - 5:00 pm
SIN
-
PDX
23h 00m
1 stop
$1,021Singapore Airlines
Thu, Oct 1 - Sat, Oct 10
Singapore Airlines Logo
6:05 am - 5:35 pm
PDX
-
SIN
20h 30m
1 stop
Singapore Airlines Logo
9:00 am - 5:00 pm
SIN
-
PDX
23h 00m
1 stop
$1,035Singapore Airlines
Thu, Oct 1 - Sat, Oct 10
Singapore Airlines Logo
5:05 am - 5:35 pm
PDX
-
SIN
21h 30m
1 stop
Singapore Airlines Logo
9:00 am - 1:27 pm
SIN
-
PDX
19h 27m
1 stop
$1,036Singapore Airlines
Fri, Sep 4 - Thu, Sep 10
Qatar Airways Logo
11:45 am - 8:50 am
PDX
-
SIN
30h 05m
2 stops
Qatar Airways Logo
3:15 am - 4:50 pm
SIN
-
PDX
28h 35m
2 stops
$1,045Qatar Airways
Booking Insights

KAYAK's insights & trends for Portland to Singapore flights

Get data-powered insights and trends into flights from Portland to Singapore to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Portland to Singapore?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Portland to Singapore, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Portland to Singapore is April, when tickets cost $538 (return) on average. On the other hand, the most expensive months are July and February, when the average cost of round-trip tickets is $862 and $842 respectively.

How far in advance should I book a flight from Portland to Singapore?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Portland to Singapore, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Portland to Singapore, you should book around 2 weeks before departure, which saves you about 28% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 19 weeks before departure.

Good to know

Low seasonMay
Cheapest flight$449
Best time to beat the crowds with an average 14% drop in price.
Most popular time to fly with an average 1% increase in price.
Flight from Portland to Singapore

FAQs - booking Singapore flights

  • How does KAYAK find such low prices on flights from Portland to Singapore?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Portland to Singapore.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Portland to Singapore?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Portland to Singapore is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Portland to Singapore?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Portland to Singapore with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Portland to Singapore?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Portland to Singapore up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 4 airlines serving from Portland to Singapore

 
Need help choosing which airline to fly with from Portland to Singapore? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.4
Korean AirOverall score based on 1217 reviews
8.2Entertainment
8.3Comfort
8.7Crew
8.1Food
8.5Boarding
Airline reviews

AAAAHHHH... It was shocking in a very positive way, the attention to detail, the courtesy, the manners of all personnel on board, the constant honest smiling. You can see and feel they take pride in all they do no matter how trivial. The plane in general was very comfortable. I can't wait to do it again

8.0 ExcellentCarlos J, Apr 2026
TPA - ATL
Read more Korean Air reviews

AAAAHHHH... It was shocking in a very positive way, the attention to detail, the courtesy, the manners of all personnel on board, the constant honest smiling. You can see and feel they take pride in all they do no matter how trivial. The plane in general was very comfortable. I can't wait to do it again

The boarding process was efficient and quick. The seats were comfortable. The food was good. The service was excellent. We had a lovely flight from Seattle on Korean air

Flight crew was fantastic. The aircraft was meticulously cleaned at all times. The crew was continuously checking to see if the passengers were ok.

They were trying to get people to check luggage because the over head compartments were full but when we boarded there were lots of empty places that people could have put the luggage.

It was good, I liked the self-serve snacks but it was a little difficult to get the alcohol, which is understandable since I wouldn't want kids sneaking it.

Friendly flight attendants and gate agents. Very clean plane and food was good!

I was unable to select decent seats, and so I was stuck in the middle seat because it was selected for me

Korean air has a little bit more seating space than Asiana air.

There was a lot of partial tv shows but not enough to last the flight. The food was incredible! The crew were so helpful and patient. Lots more space than what I usually get on an international flight. Very comfortable!

Stingy on the drinks - 15 hour direct flight and could barely get attention for some water

Kayak really screwed up by offloading the booking to a third party. They were completely inept and caused a bunch of toil. I will never use Kayak again.

I had ordered vegetarian food. What I was presented was extremely dissatisfying and not up to the mark. I pretty much did not eat entire 19 hours. For.an airline voted as best in business, it was extremely disappointing. Seats were not comfortable to sleep. Entertainment system didn’t have much choice. WiFi didn’t work for more than half the time. Cabin crew were also difficult to understand. A bit of diversity like Emirates crew would go a long way.

A little more room from the reclining seat in the front of me.

It was okay. I feel that Singapore Airlines isn't as good as it used to be but it's still not bad

It was fine. Nothing special but nothing went wrong so all good.

Overall the airline tried to give excellent service. The wheelchair service was bad at SFO. My baggage was also delayed but I thank them for taking the trouble to find it and deliver it to my home.

I felt that the whole experience went very smoothly. The aircraft was extremely clean and tidy on boarding. The cabin crew were beautifully turned out very, very efficient and were a credit to Singapore Airlines who are now my favourite carrier.

Excellent crew service. Professional, courteous. Service with a smile. Good food Very decent flight experience

Overall were very good and I was satisfied w/ all the food and services.

Service was very good, food and entertainment systems were good

Excellent! I got to Munich and was transferred to my Lufthansa flight quickly, in 15 to 20 minutes, so I did not miss my flight. However, I had checked my overhead bag at the boarding gate in Tampa. That got to Tunis the next day. That is to be expected.

It's a short hop. My carryon was checked at the gate, I didn't have to drag it all over the airport. Excellent wheelchair assist.

WiFi didn’t exist , seats were super cramped, lights stayed on near my seat for a long time while others were dimmed, the food/trash/drink cart hit my shoulder at least a couple of times while moving, food options were down to just one option by the time it got to my row, the utensils were garbage (knife bent at a couple of places by the time I was done eating) the spoon was very flimsy plastic

Friendliest Flight Attendant I’ve seen since I flew on Southwest Airlines. The whole trip was outstanding…and arrived Early!

It was good overall except from Omaha to Denver when flight a was a repeatedly delayed apparently due to some issue at Denver. Communications could have been handled better. I had to board then deboard with luggage and board again

I didn’t have a seat assignment and my seat was very dirty on the flight from Frankfurt to Budapest.

Left an hour and a half after the listed time. Up side was it had TV screens on the seat.

No screens or meal options. Freezing cold. Dirty seats. Left late.

O’hsre taxi and deboarding took 40 minutes. Needed 20 minutes extra time between connecting flights to avoid running through terminal.

Cree was organized and pleasant. Plane had good seating but as it’s a shuttle toilets hadn’t been thoroughly cleaned (eg. bins too full)

They did not let us board because one member needed a transit visa, which was not evident at the time of ticket purchase.

I was charge a baggage checking fee $68!! I volunteered to check my duffle bag which usually goes under my seat!

I did not like anything because the flight was cancelled yesterday and I did not get to arrive on time in Toronto as I was rebooked with another airline. This caused me to be really stressed out as I am an individual with back injury and to be forced to stay longer in an airport to accommodate a change of airline and the transfers associated with it Due to this I am probably not going to book through your website to eliminate this potentially chaos in the future

shittiest airline in the hemisphere. To improve - start thinking you're flying people, not cattle

Easy boarding, inflight refreshments came on time and comfortable seat

It was good that our flight left early. It was a nice smooth flight and landing.

All good……but luggage didn’t make it on the airplane. Had to wait 3 days. Was a bummer.

Small suitcase used for carryon the last time was refused by boarding crew this time. Appears to be at the discretion and mood of the person on the day. Flight was only half booked, there would have been no problem with space.

It was a problem because there was a delay where we sat before taking off from newark,then when landed in Toronto we sat on tarmac and they wouldn't let us out for a long period of time. When we finally were released to the airport in Toronto the attendant scanned our boarding pass that we were here for our connection to Brazil. We ran all the way to the gate and they said at the gate the door is shut so we can not let you on the plane. We explained that we were checked in by the attendant when we arrived at Toronto airport to go to Brazil and they should not have shut the door. We were ignored at the gate

Flight home was delayed multiple times, did not get home until 2am

Everything you need to know for your flight from Portland to Singapore

Information on your arrival and departure airports