PDX - SOF

$465 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 7/7. 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
$832
Typical prices: $856-$707
United Airlines
Sat 9/12Fri 10/2
PDX - SOF • 2 stops
Cheapest one-way
$465
Lufthansa
Tue 7/7
PDX - SOF • 2 stops
Top airlines
Cheapest • from $832 (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

Sat, Sep 12 - Fri, Oct 2
United Airlines Logo
11:02 pm - 12:10 pm
PDX
-
SOF
27h 08m
2 stops
United Airlines Logo
6:20 am - 2:51 pm
SOF
-
PDX
18h 31m
2 stops
$832United Airlines
Sun, Sep 13 - Fri, Oct 9
Multiple Airlines Logo
5:30 am - 11:15 pm
PDX
-
SOF
31h 45m
2 stops
Multiple Airlines Logo
6:20 am - 9:31 am
SOF
-
PDX
37h 11m
2 stops
$833Multiple Airlines
Sun, Sep 13 - Fri, Oct 9
KLM Logo
9:40 am - 2:00 pm
PDX
-
SOF
18h 20m
2 stops
KLM Logo
7:00 am - 11:10 am
SOF
-
PDX
14h 10m
1 stop
$835KLM
Sat, Sep 12 - Fri, Oct 9
Lufthansa Logo
2:27 pm - 12:10 pm
PDX
-
SOF
35h 43m
2 stops
Lufthansa Logo
12:55 pm - 10:23 pm
SOF
-
PDX
19h 28m
2 stops
$838Lufthansa
Mon, Sep 14 - Wed, Sep 30
Air Canada Logo
10:10 am - 6:00 pm
PDX
-
SOF
21h 50m
2 stops
Air Canada Logo
6:20 am - 7:06 pm
SOF
-
PDX
22h 46m
2 stops
$840Air Canada
Tue, Sep 8 - Fri, Sep 25
United Airlines Logo
7:00 am - 6:40 pm
PDX
-
SOF
25h 40m
2 stops
United Airlines Logo
6:20 am - 8:10 pm
SOF
-
PDX
23h 50m
2 stops
$842United Airlines
Sat, Sep 12 - Wed, Sep 30
United Airlines Logo
11:02 pm - 12:10 pm
PDX
-
SOF
27h 08m
2 stops
United Airlines Logo
6:10 am - 10:23 pm
SOF
-
PDX
26h 13m
2 stops
$843United Airlines
Wed, Sep 9 - Fri, Oct 9
United Airlines Logo
5:00 am - 6:40 pm
PDX
-
SOF
27h 40m
2 stops
United Airlines Logo
6:10 am - 6:51 pm
SOF
-
PDX
22h 41m
2 stops
$844United Airlines
Tue, Sep 15 - Fri, Oct 2
United Airlines Logo
9:00 am - 6:40 pm
PDX
-
SOF
23h 40m
2 stops
United Airlines Logo
6:20 am - 2:51 pm
SOF
-
PDX
18h 31m
2 stops
$862United Airlines
Tue, Sep 15 - Thu, Oct 8
United Airlines Logo
8:25 am - 12:10 pm
PDX
-
SOF
17h 45m
2 stops
United Airlines Logo
6:30 am - 2:51 pm
SOF
-
PDX
18h 21m
2 stops
$863United Airlines
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 September.

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 August, where the average cost of round-trip tickets is $1,279 and $980 respectively.

Good to know

Low seasonJanuary
Cheapest flight$465
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly and prices are also 17% 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 5 days, the lowest price for a flight from Portland to Sofia was $465 for a one-way ticket and $832 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?

    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 $720 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 $698 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 1527 reviews
7.2Entertainment
7.7Comfort
8.4Crew
7.8Boarding
7.3Food
Airline reviews

As always, it’s a pleasure to travel with KLM. It is one of my favorite airlines.

10.0 ExcellentGeorge, May 2026
OTP - AMS
Read more KLM reviews

As always, it’s a pleasure to travel with KLM. It is one of my favorite airlines.

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

Crew is not the cheerful type. very slow meal service (this is their style as have flown this many times)

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.

I paid for a confirmed upgraded aisle seat and was moved to a center seat in the back of the plane at the last minute.

Smooth travel. Immediate update prior flight delay so I can arrange myself properly without too rush.

Everything was the best it could be. Crew found me with pre- ordered food. Excellent experience!

Improve the food offerings and cabin seating. My wife would prefer to fly another airline, even with a connection for a more comfortable trip. A 737-8 should not be scheduled for a 6 hour segment, which turned into 7.5 hours due to the origin ground delay.

Packed flight, which makes it tough on crew and boarding staff (and the customers of course). But this was great boarding, clear instructions, etc. Traveling on the weekends are always fraught with danger as you have families and less frequent flyers thus more confusion. But this flight went as planned.

Destroyed my suitcase. Tired of talking about it. Cancelling my unite mileage plus account.

Read the fine print. This was my flight home. I booked my flight for the quickest way home. Had a carry-on and a personal item. Same as my outbound flight. Apparently I needed to pre-pay extra for my carry-on. When I checked in, I was told that I had to check it. I said I’ll pay for it, and was told that this wasn’t an option anymore. They said I still had to pay $50 to check my carry-on. I told them I’ll pay whatever to just carry it in as intended. I was not allowed, so eventually I paid $50 to check my carry-on under a plane that was half full, with overhead compartments that were even less full. My white carry-on suitcase was practically destroyed getting from Idaho falls to Denver to Orange County. The low price air fair was a bait and switch. Got me to the gate, made me pay extra, then didn’t even allow me to pay for a carry on. Not to mention that I paid the $8 for WiFi that didn’t work. All to get my suitcase destroyed. I don’t think I’m going to even keep my Untied mileage plus membership and card. Apparently, membership does not have its privileges for this one.

The flight was delayed, they didn’t even have water for the toilets or for drinks

Even through the flight was delayed due to storms near IAH The flight was great! The crew was so hospitable and professional

I flew from Santa Fe to Denver to catch a flight to London and the transfer of my luggage on arrival at Denver to the London flight worked perfectly. The crew on the ground and on board for the London flight were so friendly and efficient.

They messed up my seat so I didn’t get the one I paid for

Put me on standby; flight was late; missed my connecting flight; disaster

Flight attendants were fine, seats a bit hard but I use a cushion for extra support. The only issue was it was a bit too cool and I needed to ask for and received and extra blanket. I survived!!!

Very few things and/or people are excellent. It was very good.

Extremely uncomfortable seats. Experience was like a Frontier Airlines flight. Would not fly it again.

Very, very tight legroom. They must’ve jammed in an additional few rows of seat seating. Denver to Munich was the least legroom I’ve ever had on any flight, let alone a multi hour international journey. I will not take that flight again.

In my first flight with Air Canada we sat in the plane for 4:00pm to 6:30pm. Finally we were asked to get off the plane and we were told the flight was cancelled after 7:00pm There was o clear explanation of what was the problem. I was booked without my permission on a Delta Flight at 7:30pm that was leaving at 8:00pm and I still had to go get my luggage(my final destination was Rome with one stop in Toronto. The luggage claim for Canada was closed so had to return to finally get it on the luggage belt.. Of course I missed the Delta flight and all the next day flights were booked. I also lost what I paid for my stay in Rome because I did nt cancel in time. A complete nightmare.

Good food, overall very comfy. The flight was full so obviously not optimal, but it is what it is.

Perfect airline, super friendly, great service, tasty food. Would fly again.

Parents with permanently crying baby on board. Neither parents nor crew did anything to calm the baby. The food was extremely disappointing. Seafood stew was very, very small! Not even appetizer size! Seat had a gap in the back. Had to use a pillow to fill it.

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

Information on your arrival and departure airports