PDX - SOF

$334 Find Cheap Flights from Portland to Sofia

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 Sofia departing on 7/21. 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

Wed, Aug 13 - Wed, Aug 20
United Airlines Logo
9:47 am - 11:00 pmPDX-SOF
27h 13m2 stops
United Airlines Logo
6:15 am - 12:43 pmSOF-PDX
40h 28m2 stops
$620United Airlines
Find Deal
Tue, Jul 29 - Wed, Sep 17
United Airlines Logo
10:55 am - 11:00 pmPDX-SOF
26h 05m2 stops
United Airlines Logo
6:15 am - 11:01 pmSOF-PDX
26h 46m2 stops
$684United Airlines
Find Deal
Tue, Aug 12 - Wed, Aug 20
 Logo
2:12 pm - 12:00 pmPDX-SOF
35h 48m2 stops
 Logo
12:45 pm - 11:01 pmSOF-PDX
20h 16m2 stops
Tue, Jul 29 - Wed, Sep 17
British Airways Logo
10:39 am - 8:40 pmPDX-SOF
24h 01m2 stops
British Airways Logo
9:30 pm - 5:35 pmSOF-PDX
30h 05m1 stop
$711British Airways
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Tue, Aug 12 - Thu, Aug 21
 Logo
10:05 am - 5:50 pmPDX-SOF
21h 45m2 stops
 Logo
10:50 am - 6:46 pmSOF-PDX
17h 56m2 stops
Wed, Aug 13 - Thu, Aug 21
Lufthansa Logo
7:00 am - 11:15 amPDX-SOF
18h 15m2 stops
Lufthansa Logo
6:15 am - 10:25 pmSOF-PDX
26h 10m2 stops
$843Lufthansa
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Thu, Aug 14 - Wed, Aug 20
Lufthansa Logo
7:00 am - 11:15 amPDX-SOF
18h 15m2 stops
Lufthansa Logo
6:15 am - 6:31 pmSOF-PDX
22h 16m2 stops
$891Lufthansa
Find Deal
Sat, Jul 12 - Sat, Jul 19
Air Canada Logo
7:40 pm - 5:50 pmPDX-SOF
36h 10m2 stops
Air Canada Logo
12:00 pm - 6:46 pmSOF-PDX
40h 46m2 stops
$1,018Air Canada
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Wed, Aug 13 - Tue, Aug 19
KLM Logo
1:15 pm - 2:00 pmPDX-SOF
14h 45m1 stop
KLM Logo
7:00 am - 8:59 pmSOF-PDX
23h 59m2 stops
$1,804KLM
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Mon, Jun 30 - Thu, Jul 31
KLM Logo
1:15 pm - 2:00 pmPDX-SOF
14h 45m1 stop
KLM Logo
7:00 am - 7:00 pmSOF-PDX
22h 00m2 stops
$2,169KLM
Find Deal
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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.

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 October, where tickets cost $739 (return) on average. On the other hand, the most expensive months are December and May, where the average cost of round-trip tickets is $1,437 and $1,424 respectively.

Good to know

Low seasonJanuary
High seasonJuly
Cheapest flight$334
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly with an average 14% increase in price.
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 $334 for a one-way ticket and $620 for a round-trip.

  • 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?

    SkyTeam, oneworld, and Star Alliance 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, KLM or United Airlines?

    The two airlines most popular with KAYAK users for flights from Portland to Sofia are KLM and United Airlines. With an average price for the route of $918 and an overall rating of 7.8, KLM is the most popular choice. United Airlines is also a great choice for the route, with an average price of $1,190 and an overall rating of 7.4.

  • 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 1363 reviews
7.8Boarding
7.1Entertainment
8.4Crew
7.2Food
7.7Comfort
Airline reviews

Klm start boarding while somw air issue in the plan

8.0 ExcellentA, Jun 2025AMS - YYZ
Read more KLM reviews

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

Transfer at Amsterdam airport is very convenient and the airport is easy to navigate. Boarding was also quick and easy. Cabin crew were excellent and the meals were good, although lacking in options.

Overall very positive. Boarding was quick and organized. Cabin was clean and seats were reasonably comfortable. Cabin crew was excellent and the meals provided were also of good quality

This fight left ahead of time which meant it arrived early which was great. Staff were very professional, but as with all these Short hop Flights the food was a disappointing snack There was no entertainment on this flight, but I did not expect any

Gate agent did not hold flight for connection, provided no assistance to get new flight

Evidently, my seat had the only broken TV. I couldn’t plug it in, get it to come on, or watch anything, and of course, no one could fix it while we were on the plane. The service was good and the boarding was quick

United airlines, mediocre at best. No issues , nothing great . Worked for me

Boarding experience was smooth. Flight attendants were friendly and helpful. Entertainment system on the Houston-Edmonton flight did not function for passengers on the left side of the aisle. On the bird's eye flight from Quito to Houston, they should not serve a meal. No one needs to eat after midnight and it is disturbing for those passengers trying to sleep.

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

It was fine, definitely older planes with no charging or anything. There’s no entertainment set up on board, but it is nice that they allow you to access the in flight entertainment from your phone without having to pay for the Wi-Fi and they do offer free texting.

Terrible. Out flight was delayed for 21 (twenty one) hours. United is a joke.

Boarding was mayhem. Late boarding by 15 minutes because of lack of staff (missing 1 flight attendant. We had to wait for an arrival of another plane before we could board). Flight was a little rough, but cannot blame on airlines.

Impressed with the service despite turbulence because of the weather. Both flights arrived before their scheduled times.

Very comfortable (upgraded to business class). The audio on my screen didn’t work, but I managed to play the audio through my phone while watching the screen.

Flight was delayed but the real issue is how long we sat after boarding. Space very limited for an overnight flight and seatbacks didn’t recline so it was almost impossible to sleep.

The staff made sure I was comfortable, moved me to a better seat with more leg room

Easy boarding and comfortable seating were plusses. Enjoyed the experience and good service from the captain and crew. Many thanks...!

Somehow, my booking was under my preferred name instead of my legal name so they almost didn’t let me board the plane at LAX. This problem should have been notified to me when I was still in Toronto.

Great overall. Quick boarding, attentive staff - great experience in premium class.

When arriving over 2 hours early to check k in at Charlotte airport I was told I would have to check my carry on ? Apparently the flight was full and may not be room. I was not given a choice and the agent was quite unpleasant about it. I am a senior amd was not comfortable me having to worry about my bag being lost vut it didn’t seem to bother him. There were lots and lots of people of all ages in line when we boarded with carryons and most larger than mine .the rest of my journey was pleasant vut this was totally unacceptable.

The layover was 6 PLUS hours and we were only given a $15.00 voucher. We missed our first activity in Quebec due to the delay.

Miserable staff as it was a late/delayed flight and crew wasn’t in the best spirits. Completely understood as neither was most of the passengers. Still unacceptable l.

Or the greatest and it ended up picking us up from Chicago to Toronto not sure who was tesponsible for the 4 hr delay. United should have been properly prepared for a scheduled flight from Austin to Chicago and they were not.

It was a short flight, and no entertainment. That was not a problem for us, but there is no option for "not applicable". There was a bit of turbulence, so there was no food service.

Cheapest airlines I have ever been on. I got downgraded and never got on united. I got rerouted through Vancouver onto jetwesf

Flight was 1.5 hours late to depart so changed flights to Swiss Air.

The United Airlines crew that operated this flight was subpar. They didn’t

Very small and uncomfortable seats, Hard to hear entertainment system sound. Horrible food. Staff doesn't care much about the passengers. 2nd time they didn't give me my vegetarian meal. They asked me regular food with meat. The airline and staff was from United airlines.

Checkin took along timen only.few angents available at.checkin desk. Customer support over phone no existence

At baggage claim, I was given the wrong printed ticket. The ticket belonged to another passenger for a different flight — to Zurich instead of Frankfurt (layover). I was even allowed to pass security, and when I asked the Lufthansa employee if I was on the correct flight, and why it was changed. The employee said everything was correct and I should board. When I got on the plane, there was someone in my seat, and the crew on the plane finally realized that I was on the wrong plane. When I got off the plane, nobody was willing to help, and the security refused to provide my original printed ticket. That was until I showed them that I took a photo of the ticket; once they realized I had photographic evidence, they were suddenly ready to help me. The Lufthansa employee began communicating with other airlines and found a flight that would take me to my destination via Polish Airlines. I was required to once again go through security, re-check my bag, and once again pay for my checked bag and weight overage fees. This experience was incredibly stressful and very frustrating, as you can imagine. A Lufthansa employee told me I would be eligible for a refund. Please tell me what steps I need to take in order to make that happen. Thank you!

The row of seats were so cramped it was difficult to get in and out of your seat. I even upgraded. A long flight and sad accommodations 😵‍💫 the shorter flight was very comfortable and the seating was spacious

I bought a ticket and paid for for our luggage but I had to pay for my luggage again. I’m so disappointed! We had a 30 min delay and because of that we missed our connecting flight and were told that we would be on the next flight (9am flight ) but we were landed we were booked at 12pm flight. I had a little baby w me, it was very stressful. I begged to leave at 10 am at least. I was emailed that we get a voucher but they didn’t work when we were at a breakfast store. I’ve been always happy w Lufthansa but this time was awful.

Good service … bus transfer upon arrival from plane to terminal: atrocious!!!

helpful and friendly. The Lufthanza people I dealt with before my holiday were so unhelpful by comparison.

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

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