HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Sofia

$525+ Cheap flights from Portland (PDX) to Sofia (SOF)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/12. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SOF
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Portland to Sofia with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Find flight deals from Portland to Sofia

Cheapest flights from Portland to Sofia
Explore the most affordable flight options available from Portland to Sofia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 29, 2025.

This United Airlines deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2810:05 amPDX - SOF
2 stops26h 40mUnited Airlines
Tue 12/232:00 pmSOF - PDX
2 stops54h 01mUnited Airlines
Deal found 10/27$559
This United deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/237:00 amPDX - SOF
2 stops25h 00mMultiple Airlines
Wed 12/36:10 amSOF - PDX
2 stops37h 05mMultiple Airlines
Deal found 10/28$595
This Expedia deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2410:52 amPDX - SOF
2 stops21h 28mMultiple Airlines
Tue 12/22:15 pmSOF - PDX
2 stops38h 15mMultiple Airlines
Deal found 10/28$601
This SWISS deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2410:52 amPDX - SOF
3 stops21h 28mSWISS
Tue 12/22:00 pmSOF - PDX
3 stops42h 15mSWISS
Deal found 10/28$643
This Cheapflightsfares deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2912:55 pmPDX - SOF
2 stops20h 25mLufthansa
Sun 11/236:10 amSOF - PDX
2 stops22h 20mLufthansa
Deal found 10/27$671
This Air France deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/299:58 amPDX - SOF
2 stops19h 07mMultiple Airlines
Sun 11/237:00 amSOF - PDX
1 stop14h 25mMultiple Airlines
Deal found 10/27$683
This KLM deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/292:25 pmPDX - SOF
1 stop14h 40mKLM
Sun 11/237:00 amSOF - PDX
1 stop14h 25mKLM
Deal found 10/27$684
This KLM deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/241:25 pmPDX - SOF
1 stop14h 40mKLM
Tue 12/27:00 amSOF - PDX
2 stops18h 33mKLM
Deal found 10/28$695
This KLM deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/231:25 pmPDX - SOF
1 stop14h 40mKLM
Wed 12/37:00 amSOF - PDX
2 stops20h 43mKLM
Deal found 10/28$750

Cheap flight deals from Portland to Sofia

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to Sofia (SOF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$525
(FlightHub)

Popular in

May

Cheapest in

November

Average price

$748
Provider with most accurate pricing for Portland-Sofia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Sofia flights.
Search Deals
From Portland to Sofia
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($257 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($39 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland to Sofia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 29, 2025.
Use the filters below to find and compare flights from Portland to Sofia that are best for you.

Fly from

Portland

Fly to

Sofia

Route

Depart

Return

Price

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 1/12

3:50 pm-10:45 pm

2 stops20h 55m

Sofia

Fri 1/30

6:10 am-6:30 pm

2 stops22h 20m

$525

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 1/12

7:00 am-2:05 pm

2 stops21h 05m

Sofia

Fri 1/30

7:00 am-11:25 am

1 stop14h 25m

$533

PortlandSofia

PDX - SOF

PDXSOF

Portland

Fri 11/28

10:05 am-10:45 pm

2 stops26h 40m

Sofia

Tue 12/23

2:00 pm-10:01 am

2 stops54h 01m

$559

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sun 11/23

7:00 am-6:00 pm

2 stops25h 00m

Sofia

Wed 12/3

6:10 am-9:15 am

2 stops37h 05m

$595

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 11/24

10:52 am-6:20 pm

2 stops21h 28m

Sofia

Tue 12/2

2:15 pm-6:30 pm

2 stops38h 15m

$601

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 11/24

10:52 am-6:20 pm

3 stops21h 28m

Sofia

Tue 12/2

2:00 pm-10:15 pm

3 stops42h 15m

$643

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sun 11/23

1:25 pm-2:05 pm

1 stop14h 40m

Sofia

Wed 12/3

7:00 am-5:43 pm

2 stops20h 43m

$750

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 1/12

11:59 pm-6:20 pm

3 stops32h 21m

Sofia

Fri 1/30

2:35 pm-2:40 pm

3 stops34h 05m

$811

PortlandSofia

PDX - SOF

PDXSOF

Portland

Fri 11/28

1:25 pm-2:05 pm

1 stop14h 40m

Sofia

Tue 12/23

7:00 am-8:34 pm

2 stops23h 34m

$845

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Compare providers for flights from Portland to Sofia

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to Sofia in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Portland-Sofia flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Portland-Sofia flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Portland-Sofia flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland-Sofia flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland-Sofia flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Portland to Sofia

Have a flexible travel schedule? Discover the best time to fly to Sofia from Portland with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Portland to Sofia?

Currently, September is the cheapest month in which you can book a flight from Portland to Sofia (average of $638). Flying from Portland to Sofia in May is currently the most expensive (average of $1,169). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PDX to SOF?

Find hourly flight availability from Portland to Sofia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 29, 2025.

A simple way to save on the total cost of your ticket is to fly from Portland to Sofia at noon. If you’re flexible enough to do this you can expect to save up to 13% on your trip compared to booking a flight in the morning.

Reviews of airlines servicing Sofia

Get insights into the airlines that provide service to Sofia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sofia. Reviews last updated October 29, 2025.
Read reviews from past customers who have flown KLM, United Airlines, and Air Canada from Portland to Sofia. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.7
Good
1,406 reviews

Crew

8.4

Overall

7.7

Food

7.3

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
KLM
7.7
Good
1,406 reviews
KLM
7.7
Good
1,406 reviews

Crew

8.4

Overall

7.7

Food

7.3

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
United Airlines
7.4
Good
9,001 reviews
KLM
7.7
Good
1,406 reviews

Crew

8.4

Overall

7.7

Food

7.3

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Air Canada
7.1
Good
10,373 reviews
KLM
7.7
Good
1,406 reviews

Crew

8.4

Overall

7.7

Food

7.3

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Lufthansa
6.8
Okay
7,540 reviews
KLM
7.7
Good
1,406 reviews

Crew

8.4

Overall

7.7

Food

7.3

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

Related info for your journey

Find useful and relevant information for your journey from Portland to Sofia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Portland to Sofia?

    Lufthansa and United Airlines can get you from Portland to Sofia in just under 20h 55m. Your travel time can differ by up to 5h 45m. Airlines will cover a distance of 5985 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Portland to Sofia round-trip?

    Cheapflights users have booked flights from Portland to Sofia round-trip from $638. Other airlines that can offer you cheap pricing are United Airlines, from $639, and Air Canada, from $678. Lufthansa is priced at 36% lower than the current average price of a flight leaving 3 months from now.

  • Can I find deals for flights from Portland to Sofia that include hotel bookings?

    Yes. In addition to deals on Portland to Sofia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to Sofia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Sofia.

  • Can I find deals for business class flights from Portland to Sofia?

    Yes. Cheapflights offers flight deals from Portland to Sofia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Portland to Sofia?

    Currently, September is the cheapest month in which you can book a flight from Portland to Sofia (average of $638). Flying from Portland to Sofia in May is currently the most expensive (average of $1,169). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Portland to Sofia

See prices for flight routes from nearby airports that may be better suited for you.
Boise to Sofia flights

Top 4 airlines flying from Portland to Sofia

Discover the top 4 airlines that operate flights from Portland to Sofia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$638Average$1,009FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$639Average$924FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$678Average$1,124FlexibilityNo cancel feeOn-time67%
KLMCheapest$692Average$929FlexibilityNo cancel feeOn-time75%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.