A historic square with ornate buildings, a prominent cathedral, and a tram in motion.

$344 Cheap Flights from Portland (PDX) to Sofia (SOF)

View $344 flight on Sun, Feb 28, 2027Opens in a new window

Popular airlines from Portland International Airport (PDX) to Sofia Airport (SOF)

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 30% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Portland to Sofia (PDX-SOF)

Prices were available within the past 7 days and start at $344 for one-way flights and $737 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Tue, Jan 19 - Tue, Feb 16
PDX
Portland
SOF
Sofia
$737 Roundtrip, found 8 hours ago
$737
Roundtrip
found 8 hours ago
Select Air Canada flight, departing Tue, Jan 19 from Portland to Sofia, returning Tue, Feb 16, priced at $737 found 8 hours ago
United
Sun, Mar 21 - Fri, Apr 2
PDX
Portland
SOF
Sofia
$741 Roundtrip, found 3 days ago
$741
Roundtrip
found 3 days ago
Select United flight, departing Sun, Mar 21 from Portland to Sofia, returning Fri, Apr 2, priced at $741 found 3 days ago
United
Sun, Mar 21 - Fri, Apr 2
PDX
Portland
SOF
Sofia
$743 Roundtrip, found 3 days ago
$743
Roundtrip
found 3 days ago
Select United flight, departing Sun, Mar 21 from Portland to Sofia, returning Fri, Apr 2, priced at $743 found 3 days ago
Air Canada
Sun, Mar 21 - Fri, Apr 2
PDX
Portland
SOF
Sofia
$749 Roundtrip, found 3 days ago
$749
Roundtrip
found 3 days ago
Select Air Canada flight, departing Sun, Mar 21 from Portland to Sofia, returning Fri, Apr 2, priced at $749 found 3 days ago
United
Sun, Mar 21 - Fri, Apr 2
PDX
Portland
SOF
Sofia
$751 Roundtrip, found 3 days ago
$751
Roundtrip
found 3 days ago
Select United flight, departing Sun, Mar 21 from Portland to Sofia, returning Fri, Apr 2, priced at $751 found 3 days ago
United
Sun, Mar 21 - Fri, Apr 2
PDX
Portland
SOF
Sofia
$752 Roundtrip, found 3 days ago
$752
Roundtrip
found 3 days ago
Select United flight, departing Sun, Mar 21 from Portland to Sofia, returning Fri, Apr 2, priced at $752 found 3 days ago
United
Sun, Mar 21 - Fri, Apr 2
PDX
Portland
SOF
Sofia
$753 Roundtrip, found 3 days ago
$753
Roundtrip
found 3 days ago
Select United flight, departing Sun, Mar 21 from Portland to Sofia, returning Fri, Apr 2, priced at $753 found 3 days ago
Swiss International Air Lines
Wed, Jan 27 - Wed, Feb 17
PDX
Portland
SOF
Sofia
$765 Roundtrip, found 2 days ago
$765
Roundtrip
found 2 days ago
Select Swiss International Air Lines flight, departing Wed, Jan 27 from Portland to Sofia, returning Wed, Feb 17, priced at $765 found 2 days ago
Lufthansa
Wed, Nov 25 - Wed, Dec 2
PDX
Portland
SOF
Sofia
$772 Roundtrip, found 2 days ago
$772
Roundtrip
found 2 days ago
Select Lufthansa flight, departing Wed, Nov 25 from Portland to Sofia, returning Wed, Dec 2, priced at $772 found 2 days ago
British Airways
Wed, Oct 14 - Wed, Oct 21
PDX
Portland
SOF
Sofia
$853 Roundtrip, found 1 day ago
$853
Roundtrip
found 1 day ago
Select British Airways flight, departing Wed, Oct 14 from Portland to Sofia, returning Wed, Oct 21, priced at $853 found 1 day ago

What you need to know for your flight from Portland Intl. to Sofia

Portland (PDX) to Sofia (SOF) at a glance

Travel from Portland (PDX) to Sofia (SOF) with a diverse selection of airlines on this international long-haul route. Explore options from both full-service and budget carriers to discover the best itinerary that aligns with your budget, schedule, and travel plans while you take in Sofia's renowned sights and neighborhoods. Check out the essential details for flights departing from Portland International Airport (PDX) to Sofia Airport (SOF).

  • Fastest flight duration: around 12h 15m in-flight, plus roughly 2h 30m layover with one stop
  • Route distance: roughly 6,000 miles (9,660 km)
  • Flights per week: around 7 departures on average
  • Typical fares (one-way): economy tickets often range from $360–$1010, depending on seasonality and how far ahead you book

Flights from Portland International Airport (PDX) to Sofia Airport (SOF)

According to recent traveler bookings, here are the top airlines favored for flights from Portland to Sofia, featuring both multi-stop and one-stop options. Common layovers include Frankfurt International Airport (FRA) with a typical layover of about 4 hours and 15 minutes, Franz Josef Strauss International Airport (MUC) at approximately 2 hours and 45 minutes, and Seattle-Tacoma International Airport (SEA) with a layover of around 2 hours and 15 minutes. This variety allows you to customize your itinerary based on price, total travel time, and cabin class.

  • United: As a full-service airline, United provides multi-stop options with one-way ticket prices generally between $360 and $1000. It represents about 28% of flights on this route, offering an in-flight duration of 14 hours and 15 minutes, and a total travel time of around 19 hours and 30 minutes, including layovers.
  • Delta: This full-service carrier features one-stop and multi-stop services, with one-way fares typically ranging from $435 to $870. Delta accounts for approximately 22% of departures on this route, with an average in-flight time of 12 hours and 15 minutes, and a total journey duration of roughly 14 hours and 45 minutes.
  • Lufthansa: Offering multi-stop travel, Lufthansa is a full-service airline with one-way fares usually between $370 and $840. It makes up about 12% of departures on this route, providing an in-flight time of 14 hours and 15 minutes, and a total journey time of approximately 19 hours and 30 minutes, including layovers.
  • KLM: This full-service airline is known for its one-stop service, with one-way fares typically falling between $430 and $910. KLM constitutes around 12% of departures on this route, with an in-flight duration of 12 hours and 15 minutes, leading to a total journey time of about 14 hours and 45 minutes, including layovers.
  • British Airways: A full-service carrier, British Airways offers one-stop service with one-way fares generally ranging from $585 to $1150. It represents about 10% of departures on this route, with an in-flight time of 12 hours and 15 minutes, and a total travel time of approximately 14 hours and 45 minutes, factoring in a layover.

How to find the best prices for flights from Portland (PDX) to Sofia (SOF)

Getting some of the best deals on flights from Portland to Sofia is all about timing and flexibility. Here are some key tips to help you save:

  1. Best times to book and fly: cheaper fares are usually found when booking 2-8 weeks in advance, which aligns with when most travelers make their reservations. Departures between 12pm and 6pm often offer lower prices and are also the most popular flight times. Additionally, flying on Monday typically results in cheaper fares, while Tuesday remains the most popular travel day.
  2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
  3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.*
  4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
  5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
  6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Sofia Airport from Portland International Airport

Sofia welcomes travelers from Portland with a range of transport options based on price, convenience, and proximity. Here's how to reach Sofia efficiently:

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in Sofia, with private rides that can be arranged in advance.
  • Car rental: Renting a car from Sofia Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Sofia Airport on Expedia.
  • Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
  • Public transportation: From Sofia Airport, several key transport links are conveniently accessible. Sofia Airport Terminal 2 Station, a metro station, is located about 0.7 miles from the airport by car, while Sofia Central Station, a train station, is about 5 miles away by car. Additionally, Sofia Seaport, a seaport, is situated approximately 4.6 miles from the airport, also reachable by car.

Frequently asked questions

How much does a flight from Portland, OR (PDX-Portland Intl.) to Sofia (SOF) cost?
You can find cheap one-way flights from $344 and cheap return flights from $737 Portland, OR (PDX-Portland Intl.) to Sofia (SOF) with Expedia. One-way flights usually range from $335 to $3520, and return flights typically cost between $909 and $6819. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Portland, OR (PDX-Portland Intl.) to Sofia (SOF) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Portland, OR (PDX-Portland Intl.) to Sofia (SOF)?
The cheapest month to fly from PDX to SOF is January when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Portland, OR (PDX-Portland Intl.) to Sofia (SOF)?
Enter PDX to SOF and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Portland, OR (PDX-Portland Intl.) to Sofia (SOF)?
Condor is one of the cheapest airlines offering connecting flights from Portland (PDX) to Sofia (SOF) with a layover in Seattle - Tacoma Intl. (SEA), starting from around $1,081. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Portland, OR (PDX-Portland Intl.) to Sofia (SOF)?
To find a cheap flight from Portland, OR (PDX-Portland Intl.) to Sofia (SOF), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Portland, OR (PDX-Portland Intl.) to Sofia (SOF)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Portland, OR (PDX-Portland Intl.) to Sofia (SOF)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from PDX to SOF. To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Portland, OR (PDX-Portland Intl.) to Sofia (SOF)?
The most popular departure times for flights from Portland (PDX) to Sofia (SOF) are in the morning, from 6am to 9am. About 33% of passengers prefer this time window. Many major carriers, including United Airlines and Lufthansa, operate flights during this period. This timing works well for travelers looking to start their journey early and make the most of their day.
How long does it take to fly from Portland, OR (PDX-Portland Intl.) to Sofia (SOF)?
Flying from PDX to SOF with a connection usually takes about 14 hours 50 minutes, traveling roughly 5,989 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Portland, OR (PDX-Portland Intl.) to Sofia (SOF)?
Business class is available on flights from PDX to SOF. Airlines that offer business class service on this route include:

  • British Airways
  • Icelandair
  • United Airlines
  • Delta Air Lines
  • KLM
  • American Airlines

How do I earn miles on a Portland, OR (PDX-Portland Intl.) to Sofia (SOF) flight with Expedia?
It's easy to earn miles on a Portland, OR (PDX-Portland Intl.) to Sofia (SOF) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
Is it cheaper to buy a plane ticket from Portland, OR (PDX-Portland Intl.) to Sofia (SOF) at the last minute?
Typically, booking a last minute flight from Portland, OR (PDX-Portland Intl.) to Sofia (SOF) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Portland, OR (PDX-Portland Intl.) to Sofia (SOF) flight and hotel package?
Securing a Portland, OR (PDX-Portland Intl.) to Sofia (SOF) Sofia Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Portland, OR (PDX-Portland Intl.) to Sofia (SOF)?
If you booked your Portland, OR (PDX-Portland Intl.) to Sofia (SOF) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Portland Intl.
Destination airport
Sofia
Airlines serving
Air Canada, British Airways, ITA Airways, Iberia, Lufthansa, Swiss International Air Lines, Turkish Airlines, United
Roundtrip price
$737
Distance
5988 mi

Book with confidence

Portland to Sofia Flights

The cheapest times to fly from Portland to Sofia

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Portland to Sofia are during the month of January. You can find some of the cheapest flights from Portland to Sofia with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Portland to Sofia

Sunday is one of the best days to book for cheap flights from Portland to Sofia: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Portland to Sofia

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Portland to Sofia in 2026. You can also book with separate airlines for your outbound and return journeys, from $344 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Portland to Sofia flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Portland to Sofia airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Portland to Sofia Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

Explore a world of travel with Expedia