PDX - SOF

$607 Find Cheap Flights from Portland to Sofia

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Portland to Sofia departing on 8/26. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Sofia

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Sofia, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to Sofia, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Portland to Sofia (PDX-SOF)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Portland to Sofia 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 Sofia

Tue, Aug 26 - Thu, Oct 2
 Logo
3:25 pm - 6:40 pmPDX-SOF
17h 15m2 stops
 Logo
6:15 am - 11:01 pmSOF-PDX
26h 46m2 stops
Tue, Aug 26 - Thu, Oct 2
United Airlines Logo
6:15 am - 1:20 pmPDX-SOF
21h 05m2 stops
United Airlines Logo
6:15 am - 12:28 amSOF-PDX
28h 13m3 stops
$645United Airlines
Find Deal
Mon, Aug 11 - Mon, Aug 25
 Logo
3:25 pm - 6:40 pmPDX-SOF
17h 15m2 stops
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1:50 pm - 8:37 pmSOF-PDX
40h 47m2 stops
Tue, Aug 12 - Tue, Aug 19
United Airlines Logo
7:37 am - 11:00 pmPDX-SOF
29h 23m2 stops
United Airlines Logo
2:00 pm - 12:45 amSOF-PDX
20h 45m2 stops
$709United Airlines
Find Deal
Tue, Aug 12 - Tue, Aug 19
United Airlines Logo
5:25 am - 11:00 pmPDX-SOF
31h 35m2 stops
United Airlines Logo
2:00 pm - 12:45 amSOF-PDX
20h 45m2 stops
$715United Airlines
Find Deal
Sun, Aug 10 - Sun, Aug 24
 Logo
3:25 pm - 6:40 pmPDX-SOF
17h 15m2 stops
 Logo
1:55 pm - 10:37 pmSOF-PDX
42h 42m2 stops
Mon, Aug 11 - Mon, Aug 25
British Airways Logo
11:59 pm - 8:40 pmPDX-SOF
34h 41m2 stops
British Airways Logo
8:00 pm - 5:35 pmSOF-PDX
31h 35m1 stop
$835British Airways
Find Deal
Tue, Aug 26 - Thu, Oct 2
 Logo
7:25 pm - 11:10 pmPDX-SOF
17h 45m1 stop
 Logo
5:45 am - 8:50 pmSOF-PDX
49h 05m2 stops
Tue, Aug 12 - Tue, Aug 19
Air Canada Logo
6:15 am - 5:50 pmPDX-SOF
25h 35m2 stops
Air Canada Logo
6:00 am - 6:46 pmSOF-PDX
22h 46m3 stops
$976Air Canada
Find Deal
Tue, Aug 12 - Tue, Aug 19
Air Canada Logo
6:15 am - 5:50 pmPDX-SOF
25h 35m2 stops
Air Canada Logo
6:00 am - 6:46 pmSOF-PDX
22h 46m3 stops
$1,217Air Canada
Find Deal
Booking Insights

KAYAK's insights & trends for Portland to Sofia flights

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

How much is a round-trip flight from Portland to Sofia?

What’s the cheapest day of the week to fly from Portland to Sofia?

The average price of all round-trip flights from Portland to Sofia clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Portland to Sofia, look for departures on Tuesdays and avoid leaving on a Saturday, as it's usually the priciest day. When flying back from Sofia, Friday is the cheapest day to fly and Tuesday is the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Portland to Sofia, 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 Sofia is November, where tickets cost $682 (return) on average. On the other hand, the most expensive months are May and June, where the average cost of round-trip tickets is $1,424 and $1,383 respectively.

Good to know

Low seasonJanuary
Cheapest flight$607
Best time to beat the crowds but there is an average 1% increase in price.
Most popular time to fly and prices are also 21% lower on average.
Flight from Portland to Sofia

When to book flights from Portland to Sofia

Are your dates flexible? Find out the best times to travel from Portland to Sofia based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Portland to Sofia

  • What is the cheapest flight from Portland to Sofia?

    In the last 3 days, the lowest price for a flight from Portland to Sofia was $607 for a round-trip ticket.

  • Do I need a passport to fly between Portland and Sofia?

    Yes

  • Which airports will I be using when flying from Portland to Sofia?

    Portland and Sofia are both served by 1 main airport. You will leave Portland from Portland and will be arriving at Sofia.

  • Which aircraft models fly most regularly from Portland to Sofia?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Portland to Sofia?

    Star Alliance, and oneworld are the airline alliances operating flights between Portland and Sofia, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Portland to Sofia, United Airlines or Air Canada?

    The two airlines most popular with KAYAK users for flights from Portland to Sofia are United Airlines and Air Canada. With an average price for the route of $973 and an overall rating of 7.4, United Airlines is the most popular choice. Air Canada is also a great choice for the route, with an average price of $847 and an overall rating of 7.1.

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

    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 Sofia.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sofia from Portland 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 Sofia?

    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 to Sofia with an airline and back to Portland with another airline. Booking your flights between Portland and SOF can sometimes prove cheaper using this method.

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

    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 to Sofia from Portland 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 Sofia

 
See real verified KAYAK customer reviews for airlines flying from Portland to Sofia. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Portland to Sofia? 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.
7.8
KLMOverall score based on 1383 reviews
7.7Comfort
8.4Crew
7.8Boarding
7.3Food
7.1Entertainment
Airline reviews

The baggage drop-off in Stuttgart is bad: after online check-in you cannot use the automated baggage drop off as indicated on the website. You can use the terminals but have to cue to 1 of three open and slowly working counters to drop the bags. took about 45 minutes wait time.

6.0 GoodSimon, Jul 2025STR - AMS
Read more KLM reviews

The baggage drop-off in Stuttgart is bad: after online check-in you cannot use the automated baggage drop off as indicated on the website. You can use the terminals but have to cue to 1 of three open and slowly working counters to drop the bags. took about 45 minutes wait time.

Our first flight was delayed so we missed our connecting flight. However it was easy to book a later flight on their app.

My flight was delayed by 6 hours then I missed BOTH of my connecting flights, I then had to stay in the AIRPORT at JFK because soooooo many people also suffered from missing flights and there was no hotels available. I would like to be compensated for this experience! I had to stay in the airport for over 16 hours!

Klm start boarding while somw air issue in the plan

The service was great. However the lounge only gets passing grade

I appreciate that KLM was proactive in informing me of the 2 hour delay which enabled me to replan my travel. It was a bit stressful not knowing whether my connection from Montreal to Ottawa was happening. But the ground and air crew did a good job at comforting and assuring me.

Cabin crew professional, polite and friendly, boarding was seemless, but come on KLM surely you can do better than a pack of cheesy biscuits as an inflight snack

Cabin crew were excellent, very proffesional, polite and friendly, in flight snack was underwhelming, a packet of cheese biscuits, im sure KLM could run to a sandwich!

Legroom not all it could be, especially when the seat in front is reclined. Otherwise it was good, food and beverage were nice.

You should not have to pay for WiFi in business class

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

the delay for 3 hours was understandable due to weather conditions but the flight should’ve provided some on flight compensations or at least provide more food.

Weather delay in Chicago?. No sense of urgency to make connection in Chicago for our connecting flight that wasn't delayed. Connection was missed.

Ridiculous boarding. Enter the gate, walk down a staircase with bags, exit a building, get on a crowded bus, dropped off a few meters away from the aircraft, walk with bags to another set of stairs to board the aircraft. And all that during a pouring down rain, and with children. Ridiculous!!!

Our flight was understandably diverted to a small regional airport in Laramie, Wyoming due to weather conditions, which I fully recognize and appreciate. However, the low rating stems from the experience that followed: passengers remained on board for over an hour without the option to deplane and stretch, despite the aircraft being stationary. Although the pilot opened the cabin door, only he was permitted to exit. Meanwhile, passengers grew increasingly uncomfortable as warm summer air entered the cabin through the open door, and being in the second row meant we were impacted immediately. While the flight attendants made efforts to keep everyone at ease, I believe allowing passengers to deplane briefly, given the extended delay, would have significantly improved the overall experience.

I never flew. Flight was canceled. DIA worst airport in the country. Avoid at all costs.

I learned that seating towards the end of plane that a line forms for the restroom and people use your chair as a hand railing, bumping your seat consistently. I was seated in the aisle. I think that next time if I am towards the back row I would want to sit in the middle or window seat.

The best airline I have ever travel , really good customer service, attention and service !!

United could have one single once of customer service. No human United employee would help me with the invalid mileage plus number, they said I had to speak with the computer.

United sent me a mileage plus number last year but that number is invalid so I can’t use it to check into flights or collect mileage. There is human to speak about the problem, only computers who keep asking me if I am using the correct email. It’s so frustrating and I cannot resolve it.

Both flights are delayed so I rate the whole experience as mediocre.

I booked my flight months ago, and checked-in online about 12 hours before the flight. I received an email confirmation of check-in. I had no subsequent communication from Air Canada after my original booking. After arriving at the airport three hours before the flight, as instructed, I waited 90 minutes for an agent to appear to check my bag. I was informed that my flight had been canceled many weeks before, and that flight was no longer being run!! I showed a copy of my check-in confirmation, but no explanation could be found. I was placed on standby for the next flight and the connection. Luckily, those flights were not full and I arrived at my destination. I double checked my email, but I received no update about the flight from Air Canada until the day of the flight.

I had a good experience. I liked being informed about the status of my luggage

Very bad service the way back we was on the way for r two days very bad condition and waiting for luggage till now

I was forcefully re-routed to another destination and was delayed a total of 8hours. I have still not received my bags, no one is taking responsibility. The agents at the airport lied to me that I will get to my destination same time as my previous flight where I was forcefully re-routed from.

Flight was delayed by 1.5hrs. Once inside, people had their small handbags on the storage. The crew (male guy) was not helpful in making some space in the storage. Instead, he asked few bags to be checked-in and it was not a great experience. No attempt to help but just followed the things with a straight face. People had their literally small bags and he wouldnt not move from one storage to another even if there was space and would not let us do i as well. Once flight was on, they ran out of Orange juice, really running out of orange juice when the temp were 32.degrees outside. didnt made the sense. Onasking for a extra snack, he made a face as if he was giving me out of his pocket. if the flight was delayed, there could have an attempt to provide something extra incase people did asked.

Our flight was canceled at the last minute. Someone on the flight said the exact same thing happened to her the day before. I will say they helped us book a flight on another airline so that we could still make our vacation with little delay.

United had no (zero) record of our flight. It took over an hour of us standing in line with surly employee while others waited to get resolved. I have never experienced such poor service and poor empathy.

We had a very long delay. First the inbound flight took a while, then maintenance, they “fixed it” to then do boarding and leave the gate, and waste a lot of time to have to go back to the gate and eventually deplane. Had to wait for a new aircraft, wait for a gate, and do the whole thing again. Instead of leaving at 9:50am we left until past 1. I could’ve not woken up at 5am, or spend some more time with my family if they gave more grace period of time between flights to give some time in case of any issues. But they have to make all and every dollar possible

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.

Insulting. Lufthansa flight from Munich to EWR had us getting our luggage when we were told in Florence that it would follow us to Indianapolis. It did not. Then very slow security in EWR caused me and three other passengers from Lufthansa flight from Munich to miss the boarding closure. Behind me were two elderly grandparents and their ten year old grandson. We were all refused entry on a plane to Indy that was still at the gate. The doors had not even closed inside the terminal yet. No apologies or compensation offered. Not even a meal voucher let alone a free hotel stay for our inconvenience. I m not sure what the other three passengers behind me did ( they were elderly with a grandson, recall), but I stated 12 hours overnight in a chilly EWR airport until next flight to Indy at 850 next morning.

The food could be better, more snacks. And have some plugs to chargue the phone.

The pasta in the evening meal was tasteless. Otherwise, the flight was okay.

Everything was really great just The aircraft was too old and sounded it will break during takeoff

Seating was average for a first class seat. It very modern. I expected better.

Flight was a little late. The crew was courteous, food ok

Bad! Disaster!! The LH419 was cancelled after 4 hrs on board with no AC and no toilets

Poor food on flight between Toronto and Stockholm Airport Toronto too crowded

Extremely pleased with the crew. Best flight attendants ever! Very friendly, genuinely caring and attentive.

Best flight attendants ever! Very customer and service oriented, courteous, professional and helpful.

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

Information on your arrival and departure airports

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