PDX - SOF

$882 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 8/27. 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

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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Everything you should know

Cheapest round-trip
$882
Typical prices: $962-$704
Lufthansa, SWISS
Thu 8/27Wed 9/2
PDX - SOF • 2 stops
Top airlines
Cheapest • from $1,029 (round-trip)
Best reviews • 7.8 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Portland and Sofia. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $697 (round-trip)
Shortest trip • 14h 40m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 28% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Sofia!
Flight Deals
Booking Insights
Flight 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

Thu, Aug 27 - Wed, Sep 2
Multiple Airlines Logo
2:15 pm - 6:40 pm
PDX
-
SOF
18h 25m
2 stops
Multiple Airlines Logo
11:05 am - 11:09 pm
SOF
-
PDX
22h 04m
2 stops
$882Multiple Airlines
Thu, Aug 27 - Wed, Sep 2
Multiple Airlines Logo
3:35 pm - 9:30 pm
PDX
-
SOF
19h 55m
1 stop
Multiple Airlines Logo
10:30 am - 7:50 pm
SOF
-
PDX
19h 20m
2 stops
$920Multiple Airlines
Mon, Jun 8 - Fri, Jun 19
Multiple Airlines Logo
3:30 pm - 6:40 pm
PDX
-
SOF
17h 10m
2 stops
Multiple Airlines Logo
6:20 am - 9:31 am
SOF
-
PDX
37h 11m
2 stops
$943Multiple Airlines
Thu, Jun 11 - Thu, Jun 18
Multiple Airlines Logo
3:30 pm - 11:15 pm
PDX
-
SOF
21h 45m
2 stops
Multiple Airlines Logo
6:30 am - 7:11 pm
SOF
-
PDX
22h 41m
2 stops
$1,000Multiple Airlines
Mon, Jun 8 - Fri, Jun 19
Air Canada Logo
3:30 pm - 6:40 pm
PDX
-
SOF
17h 10m
2 stops
Air Canada Logo
6:10 am - 7:11 pm
SOF
-
PDX
23h 01m
3 stops
$1,029Air Canada
Sun, May 17 - Sun, May 24
Lufthansa Logo
3:15 pm - 11:15 pm
PDX
-
SOF
22h 00m
2 stops
Lufthansa Logo
6:10 am - 11:03 pm
SOF
-
PDX
26h 53m
2 stops
$1,033Lufthansa
Tue, May 26 - Wed, Jul 1
United Airlines Logo
6:03 pm - 11:15 pm
PDX
-
SOF
19h 12m
2 stops
United Airlines Logo
6:20 am - 12:50 am
SOF
-
PDX
28h 30m
3 stops
$1,051United Airlines
Sat, May 16 - Sat, May 23
United Airlines Logo
3:59 pm - 11:15 pm
PDX
-
SOF
45h 16m
3 stops
United Airlines Logo
12:55 pm - 5:46 pm
SOF
-
PDX
38h 51m
2 stops
$1,068United Airlines
Sat, May 16 - Sat, May 23
Multiple Airlines Logo
3:59 pm - 11:15 pm
PDX
-
SOF
21h 16m
2 stops
Multiple Airlines Logo
1:45 pm - 7:05 pm
SOF
-
PDX
39h 20m
2 stops
$1,084Multiple Airlines
Fri, May 15 - Fri, May 22
KLM Logo
9:20 am - 2:00 pm
PDX
-
SOF
18h 40m
2 stops
KLM Logo
7:00 am - 11:10 am
SOF
-
PDX
14h 10m
1 stop
$1,087KLM
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?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Portland to Sofia departing in August.

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 April, where tickets cost $595 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $1,427 and $1,061 respectively.

Good to know

Low seasonJanuary
Cheapest flight$882
Best time to beat the crowds with an average 14% drop in price.
Most popular time to fly and prices are also 11% 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 $943 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 SkyTeam 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 $758 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 $692 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 3 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 1512 reviews
7.8Boarding
7.7Comfort
8.4Crew
7.1Entertainment
7.3Food
Airline reviews

As per usual when you Hit the UK it's a slow process through customs Not as efficient at Thailand for sure

10.0 ExcellentDiane, Apr 2026
AMS - HUY
Read more KLM reviews

As per usual when you Hit the UK it's a slow process through customs Not as efficient at Thailand for sure

There were no charge points for phones on the economy seats. The seats were comfortable overall. Food was okay.. flight was on time

It was really nice experience by flying this klm flight.I personally recommend everyone to please try this klm flight

The crew were unprofessional with a racist element. I was physically abused as well from one of the crew members

Empty seats next to me - wish it had been for a longer flight!!

Delay on my previous leg, had to run to catch my flight. But that happens. Overall ok.

Delay and had to run between flight to get my connection due to this delay but besides that the overall experience was ok. I arrived with just an hour of delay.

At the airport, terrible, I do not want to even remember it. It was too humiliating for a business class passenger.

They forgot to serve food and the crew was very unfriendly. Never experienced such a bad KLM flight. Usually fly from Toronto. New York was different.

Over 1 Hr delay. No APU so no AC on ground. Plane was hot during boarding and then they closed the doors over 20 minutes before engine start so interior of plane was steamy hot and stuffy. Could have been helped by opening doors until ready to depart.

Some crew were unfriendly or in some cases just straight up rude.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

A long delay. Don't travel late in the day.

Super friendly with lots of drink options an entertainment. Friendly crew.

Standard flight with a drinks and a snack- overall very quick flight. The flight attendants were very strict, bordered on rude.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

United Airline crews were very friendly and very attentive. 12 hours flight was gone like in a shorter one.

Delayed - weather wasn't bad at either end. Also sat on tarmac in ORD.

Food was surprisingly delicious. Space in the seat is horrible when the seating front is reclined. Movie offerings were terrible. Crew was friendly and helpful.

Flight was delayed by several hours and then cancelled due to weather. But Staff was very helpful getting me on a different flight. United should offer food coupons and tooth brush and paste for stranded passengers

I upgraded to the business class cabin. It was the poorest business class I have ever experienced. No access to any business lounge in Tampa airport. Seats are not comfortable. I had a window seat and had to step/crawl over the next seat. Food was mediocre and service below average for business class. Bathroom location was ridiculous. No place to wait. I cannot believe I paid this kind of money and will never fly Lufthansa Discover again. They really should reimburse me somehow.

Boarding was disorganized. The door to one to the toilets wouldn’t lock. The plane was shockingly cramped, and clearly used for domestic flights due to the menus for items to sell domestic travelers. United should be ashamed of its small seats, tiny unclean toilets, and money grubbing stance toward services, compared to Lufthansa, Emirates, and most international carriers United is awful.

Was never allowed on and not refunded the full amount of the ticket plus charged a $300 processing fee.

Terrible. Lost our luggage for 4 days. Did not advise passengers there was a strike in Barcelona Airport and had zero personnel on hand at airport to advise passengers on where to go to file claims. We had to fend for ourselves. No assistance at all other than an online claims submission process that we had to find out about on our own.

Lufthansa cancelled our flight from Los Angeles to Naples Italy on March 10 for scheduled flight on March 12 Very stressful experience trying to arrange alternatives. Will never fly again with Lufthansa

Everything could have been better. What needed to be wrong with United went wrong

The staff was bit rude when I asked for an extra drink after one beer, asked for one wine glass.

Very good, i got two seats for myself, and was comfortable with the blanket i got

I hated the FRA Airport. Confusing signage, including the path to Immigration and Security It seems that the airport grew haphazardly over the years. I have been through multiple WW Hubs with much better experiences.

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

Information on your arrival and departure airports