$434 Find Cheap Flights from Portland to Singapore - Compare and Save

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Cheap Flights from Portland to Singapore

Cheapest round-trip prices found by our users on KAYAK in the last 5 days
Sort by: Cheapest
Singapore
19h 50m2 stops
from $912per person
Booking Insights

Price, demand and travel trends for Portland to Singapore flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

Are flights from Portland to Singapore cheaper or more expensive than last year?

Fares from Portland to Singapore are running about the same as they were around this time last year, averaging $1,023 round-trip.

What are the cheapest fares from Portland to Singapore right now?

The cheapest fare from Portland to Singapore in the last week was $912 round-trip, to Singapore Changi (SIN).

What’s the cheapest month to fly from Portland to Singapore?

March is the cheapest time of year to fly, with average fares of $944. Prices are highest in December, when average flight costs increase to around $1,301.

When is the best time to book flights from Portland to Singapore?

Book your flights 12 weeks before your trip. KAYAK data collected over the past 12 months shows that booking in this window can save you around 24% compared to booking last-minute (within 2 weeks of departure).

Which airport in Singapore is the cheapest to fly to from Portland?

All flights from Portland to Singapore arrive at Singapore Changi (SIN). On average, round-trip fares are around $1,090.

What’s the cheapest day to fly from Portland to Singapore?

Sunday tends to be the cheapest day to fly from Portland to Singapore, while Saturday is the most expensive. Fares run about 12% higher that day, based on the past 12 months of KAYAK data.

What's the cheapest time of day to fly from Portland to Singapore?

Data from the past 12 months shows it's cheapest to fly to Singapore during the morning with average prices of $1,054. The afternoon is the most expensive time to fly, with average prices of $1,295.

Key details for Portland to Singapore flights

Low season

June

Cheapest flight

$434
Beat the crowds with an average 9% drop in travelers.
The most popular month to fly with an average 15% increase in travelers.
One-way flight from Portland to Singapore

Your Portland to Singapore flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • Is now a good time to book a flight from Portland to Singapore?

    Yes. Fares from Portland to Singapore are low right now. As a rule of thumb, a round-trip under $980 (cheaper than most fares this year) is a good deal, so if you spot one at or below that, it's a good time to book.

  • How much should I budget for a flight from Portland to Singapore?

    Over the past 12 months, round-trip fares from Portland to Singapore have ranged from $980 to $1,262.

  • What are the main airports serving Singapore?

    Flights to Singapore all arrive at Singapore Changi (SIN).

  • What airlines fly nonstop from Portland to Singapore?

    Based on the flight schedule for the next 3 months, no airline regularly operates nonstop flights from Portland to Singapore. However, United Airlines offers a one-stop option.

  • Which cabin classes are available on flights from Portland to Singapore?

    On flights from Portland to Singapore you can book Economy Class, Premium Economy Class or Business Class.

  • What are some popular landmarks in Singapore?

    KAYAK travelers' favorite landmarks in Singapore include:

    • Marina Bay Sands
    • Sentosa
    • Singapore National Stadium
    • Universal Studios Singapore

Your guide to booking Portland to Singapore flights

Get tips on when to book, when to fly and what to know before your trip.
  • If you can plan ahead, the sweet spot for booking your flight is 12 weeks before your trip. KAYAK data shows fares in this window are around 24% lower than last-minute bookings (made within 2 weeks of departure). Not ready to commit? Set a Price Alert and we'll let you know when prices change.
  • If your travel dates are flexible, book your trip for March when flights are typically cheapest and avoid December when prices are at their highest.
  • Flying on Sunday is usually the cheapest. Flights on Saturday cost about 12% more on average, so being flexible with your travel dates could help you save.

Reviews of the top 3 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.
8.2
Singapore AirlinesOverall score based on 1623 reviews
8.1Entertainment
8.3Boarding
7.8Food
8.0Comfort
8.6Crew
Airline reviews

I purchased my two tickets on February 2025. Tickets were by each other, aisle and window. However, when we were boarded the assigned seats were one by the window and the other one in the middle of the four seated row. It was a horrible experience and we had to tolerate 17 hours of flight seating by different people. If the airline changes the seat arrangement, it should have the decency to notify the passengers in advance. I have checked my return tickets to Los Angeles, and I have noticed that they are not by each other and I don’t know what to do. I hope someone contacts me and rectify this mistake.

4.0 OkayFarid, Sep 2026
Read more Singapore Airlines reviews

I purchased my two tickets on February 2025. Tickets were by each other, aisle and window. However, when we were boarded the assigned seats were one by the window and the other one in the middle of the four seated row. It was a horrible experience and we had to tolerate 17 hours of flight seating by different people. If the airline changes the seat arrangement, it should have the decency to notify the passengers in advance. I have checked my return tickets to Los Angeles, and I have noticed that they are not by each other and I don’t know what to do. I hope someone contacts me and rectify this mistake.

I had selected seats together for my family of three when I first booked my tickets in February. However, I realized only when I checked in at the airport that the seats I had selected were no longer assigned to us and we were completely scattered across three different middle seats instead of being seated together! After requesting the Singapore staff to have us seated together on a full flight, they managed to find something but it was right next to the rest rooms and the whole journey of 15+ hours was really unpleasant. They said that the seat selection isn't locked and the airline can reallocate the seats anytime. No one ever told us this and it was a terribly unpleasant surprise. Will avoid Kayak/underpricer and Singapore in future

Flight attendants were awesome! Very helpful and patients. Some food were good but maybe not serving fish that kinda make the whole aircraft smell fishy. The “fried pork” was tasty but too much skin so it doesnt taste that great.

Very concerned with guest comforts going out of their way to accommodate special dietary needs when the guests hadn’t pre-ordered.

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.

I wish there was a little more leg room between the seats. The recline was good and seats overall were comfortable. I also didn’t like the 2-4-2 configuration.

toilets could be cleaned more frequently, everything else was pretty good.

Wish the underseat compartment don’t have a restriction, can fit a personal item such as backpack fully like most Boeing

Construction at PDX resulting in very lung walk from the rental car to the gate. SFO, extremely long walk between terminals to get to connecting Singapore airlines flight. My smart watch recorded a total of 3 miles.

It was serviceable, nothing special but nothing awful on this leg.

the whole trip was smooth, and as comfortable as flying is these days. flight crew was friendly and very courteous and helpful.

Yet another flight in which beverage and snack service was skipped. Other that that, firmly mediocre. Landed early, to gate late due to congestion at the gates. Airline's fault or airports fault: unknown.

The flights were on time which was great give. It was holiday travel season and there’d been some weather issues. The only complaint and this is every time with United is the terrible seat design. The head rest is not built for comfort and having my neck bent forward for a cross country trip reminded me while I try not to take United flights as a rule.

This was a very average flight. The seat was out of alignment so more uncomfortable than usual. The cabin felt not well maintained. But I safely got where I needed to go.

We had a 90 minute delay due to equipment failure that was detected just before we took off. United rebooked my connecting flight.

Dinner was okay but the breakfast was not eatable on the flight San Francisco to Zurich.

This was a Lufthansa flight. Disappointing main meal. Very rough over Canada and arrival at FRA. IFE was almost unusable.

Poor seating comfort, seat cushion too thin, very uncomfortable. My luggage didi not make the flight due to equipment change. At least. United had it delivered the next day. I was without my toilet items for one day.

Flight cancelled because of the grounded 737s. United was good about it and got us onto a later Alaska Airlines flight to Oakland (not San Francisco as originally intended). Had to go through security again and my wife dropped her MacBook Pro, which broke, a $2,500 whoopsie. But we made it home.

Warning- Air Canada makes it almost impossible to get a refund if a flight is cancelled. My flight was cancelled due to a damaged plane. This airline then rebooked me for a later flight. I went on line and tried to navigate their site to rebook to another within my original itinerary and I had thought I had changed it the first time, but since their site is nothing like our sites here in the states, you had to closely look for the links to complete the process. Then came the other problem. Trying to get a $45 refund on check in baggage, that I had paid for one day in advance. I tried calling the airline's customer service. They stated they are unable to process refunds for this. They then referred me to an on line site. This site required you to answer a multitude of drop down questions that are not applicable to a simple flight cancelation. Then right when I think I am done, it asks for an "incident number". I then eventually fly into Vancouver BC International Airport and speak to 3 Air Canada employees. They then tell me they cannot refund me my check in bagge fee. Once again, they refer me to this ridiculous site . They then give me a code to list and tell me to use the airport code, plus the letters AC followed by the flight # to list as an incident #. I tried this and guess what, it failed. Kayak, if you're listening. Something is very ethically wrong with Air Canada's refund process, especially when one of their planes is damaged and a flight is canceled. I have flown for many years, every week for a long time period with many airlines. Please post this so the public can see this accurate assessment of their airline customer service failure.

Great flight attendants, great luggage tracking, pretty good trans-pacific business class setup, food was modest. Only paid WiFi in business class unless you enter an Air Canada member number at the time of booking (e.g., no Star Alliance member number). Vegetarian food was tasty but had no protein. Overall, a good mainstream North American carrier flight experience. Acceptable if the price is right. Otherwise, I might choose an Asian carrier for elevated experience.

It was pretty straight forward, no glitches or hidden costs

The whole plane smelled and felt old. The seats were very uncomfortable. Multiple delays. Extra fees.

For goodness sake, board from the back of the plane to the front and assign overhead space. It would fix everything. Seriously.

Aircraft had technical issues. After 3 hours of trying to resolve, flight was cancelled. Was booked on a flight leaving 12 hours after intended departure. Now on 4 flights instead of 2 and a day late to my destination.

PDX staff was great and we arrived on time in YVR.

Horrible I had a health emergency and couldn’t go Air Canada refused to allow me to reschedule

Really poor travel experience. My first flight was cancelled, which cut my international trip short and threw off my schedule. I will not be flying Air Canada again if I can so help it. The crew and in-flight experience was pleasant and enjoyable but the consistent delays and cancellations are not worth it.

Economy middle seat was so narrow that I could not sit back comfortably with passengers on either side of me. Over the 9-hour flight, with my body slightly twisted most of that time, my previously-healthy left knee became very painful, even though I got up to walk multiple times. The knee is still painful 3 weeks later. Otherwise, it was a nice flight, but I was crippled over my entire vacation.

More options for your flight from Portland to Singapore

Complete your trip to Singapore with a hotel stay or car rental