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Sofia

$229+ Cheap flights from Portland (PDX) to Sofia (SOF)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/27. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SOF
Apr 17 — Apr 241
Fri 4/17
Fri 4/24
1 adult, Economy
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Cheap 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 March 18, 2026.

This United Airlines deal was found by Cheapflights users on 3/15. 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.
Wed 11/1812:40 pm
PDX
-
SOF
3 stops19h 40m
United Airlines
Sun 11/226:10 am
SOF
-
PDX
2 stops26h 08m
United Airlines
Deal found 3/15$701
This United Airlines deal was found by Cheapflights users on 3/14. 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.
Mon 7/1311:05 am
PDX
-
SOF
2 stops21h 35m
United Airlines
Tue 8/186:10 am
SOF
-
PDX
2 stops24h 40m
United Airlines
Deal found 3/14$712
This United Airlines deal was found by Cheapflights users on 3/14. 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.
Mon 7/138:50 am
PDX
-
SOF
2 stops23h 50m
United Airlines
Mon 8/172:20 pm
SOF
-
PDX
2 stops40h 30m
United Airlines
Deal found 3/14$732
This United Airlines deal was found by Cheapflights users on 3/13. 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.
Wed 7/2911:05 am
PDX
-
SOF
2 stops21h 35m
United Airlines
Sat 8/156:20 am
SOF
-
PDX
2 stops18h 31m
United Airlines
Deal found 3/13$733
This United Airlines deal was found by Cheapflights users on 3/14. 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.
Sat 4/117:14 pm
PDX
-
SOF
2 stops41h 46m
United Airlines
Sat 4/1812:55 pm
SOF
-
PDX
2 stops43h 59m
United Airlines
Deal found 3/14$779
This United Airlines deal was found by Cheapflights users on 3/13. 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.
Sat 7/411:30 pm
PDX
-
SOF
2 stops26h 40m
United Airlines
Fri 7/246:20 am
SOF
-
PDX
3 stops28h 30m
United Airlines
Deal found 3/13$799
This KLM deal was found by Cheapflights users on 3/14. 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 7/137:00 am
PDX
-
SOF
2 stops21h 00m
KLM
Tue 8/187:00 am
SOF
-
PDX
1 stop14h 10m
KLM
Deal found 3/14$840
This CheapOair deal was found by Cheapflights users on 3/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/298:35 am
PDX
-
SOF
2 stops23h 30m
Lufthansa
Sun 8/1611:50 am
SOF
-
PDX
2 stops41h 16m
Lufthansa
Deal found 3/17$890

Find 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 March 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$712
(United Airlines)

One-way from

$229
(Kiwi.com)

Popular in

June

Cheapest in

March

Average price

$684
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
One-way flight from Portland to Sofia
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($162 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($49 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
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 March 18, 2026.
Use the filters below to find and compare flights from Portland to Sofia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 7/13

8:50 am-6:40 pm

2 stops23h 50m

Sofia

Mon 8/17

2:20 pm-8:50 pm

2 stops40h 30m

$732

PortlandSofia

PDX - SOF

PDXSOF

Portland

Wed 7/29

11:05 am-6:40 pm

2 stops21h 35m

Sofia

Sat 8/15

6:20 am-2:51 pm

2 stops18h 31m

$733

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sat 4/11

7:14 pm-11:00 pm

2 stops41h 46m

Sofia

Sat 4/18

12:55 pm-10:54 pm

2 stops43h 59m

$779

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sat 7/4

11:30 pm-12:10 pm

2 stops26h 40m

Sofia

Fri 7/24

6:20 am-12:50 am

3 stops28h 30m

$799

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 7/13

7:00 am-2:00 pm

2 stops21h 00m

Sofia

Tue 8/18

7:00 am-11:10 am

1 stop14h 10m

$840

PortlandSofia

PDX - SOF

PDXSOF

Portland

Wed 7/29

8:35 am-6:05 pm

2 stops23h 30m

Sofia

Sun 8/16

11:50 am-7:06 pm

2 stops41h 16m

$890

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sun 5/24

3:30 pm-1:25 pm

2 stops35h 55m

Sofia

Thu 10/15

6:30 am-7:06 pm

2 stops22h 36m

$901

PortlandSofia

PDX - SOF

PDXSOF

Portland

Tue 6/30

11:40 pm-11:00 pm

2 stops37h 20m

Sofia

Thu 7/9

6:30 am-12:50 am

3 stops28h 20m

$901

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sun 5/24

1:05 pm-2:00 pm

1 stop14h 55m

Sofia

Thu 10/15

7:00 am-8:50 pm

2 stops23h 50m

$960
Quickest round-trip

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sat 4/11

9:15 am-2:00 pm

2 stops18h 45m

Sofia

Sat 4/18

7:00 am-11:10 am

1 stop14h 10m

$981

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/15

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland-Sofia flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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, May is the cheapest month in which you can book a flight from Portland to Sofia (average of $555). Flying from Portland to Sofia in June is currently the most expensive (average of $1,097). 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.

How much does it cost to fly round-trip from Portland to Sofia?

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 March 18, 2026.
Read reviews from past customers who have flown KLM,United Airlines, andLufthansa 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
7.8
Good
1,471 reviews

Comfort

7.6

Boarding

7.8

Crew

8.4

Overall

7.8

Food

7.3

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
KLM
7.8
Good
1,471 reviews
KLM
7.8
Good
1,471 reviews

Comfort

7.6

Boarding

7.8

Crew

8.4

Overall

7.8

Food

7.3

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
United Airlines
7.4
Good
9,434 reviews
KLM
7.8
Good
1,471 reviews

Comfort

7.6

Boarding

7.8

Crew

8.4

Overall

7.8

Food

7.3

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Lufthansa
6.8
Okay
7,858 reviews
KLM
7.8
Good
1,471 reviews

Comfort

7.6

Boarding

7.8

Crew

8.4

Overall

7.8

Food

7.3

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas

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?

    United Airlines can get you from Portland to Sofia in just under 23h 50m. Your travel time can differ by up to . Airlines will cover a distance of 5985 mi.

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

    Cheapflights users have booked flights from Portland to Sofia round-trip from $555. Other airlines that can offer you cheap pricing are Lufthansa, from $635, and United Airlines, from $639. KLM is priced at 32% 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, May is the cheapest month in which you can book a flight from Portland to Sofia (average of $555). Flying from Portland to Sofia in June is currently the most expensive (average of $1,097). 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

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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 3 airlines flying from Portland to Sofia

Discover the top 3 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 March 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$555Average$764FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$635Average$803FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$639Average$705FlexibilityNo cancel feeOn-time69%

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