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Sofia

$510+ 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 7/14. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SOF
Jun 4 — Jun 111
Thu 6/4
Thu 6/11
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 May 5, 2026.

This United Airlines deal was found by Cheapflights users on 5/5. 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 8/36:03 pm
PDX
-
SOF
2 stops19h 12m
United Airlines
Tue 8/256:10 am
SOF
-
PDX
2 stops26h 50m
United Airlines
Deal found 5/5$814
This United Airlines deal was found by Cheapflights users on 5/5. 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 8/111:30 pm
PDX
-
SOF
2 stops37h 45m
United Airlines
Tue 8/256:10 am
SOF
-
PDX
2 stops24h 40m
United Airlines
Deal found 5/5$821
This KAYAK deal was found by Cheapflights users on 5/5. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/27:00 am
PDX
-
SOF
2 stops30h 15m
Lufthansa
Mon 8/247:00 pm
SOF
-
PDX
2 stops35h 50m
Lufthansa
Deal found 5/5$838
This KAYAK deal was found by Cheapflights users on 5/5. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/112:50 pm
PDX
-
SOF
2 stops48h 25m
Lufthansa
Mon 8/247:00 pm
SOF
-
PDX
2 stops35h 50m
Lufthansa
Deal found 5/5$844
This United Airlines deal was found by Cheapflights users on 5/2. 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 8/110:40 pm
PDX
-
SOF
2 stops38h 35m
United Airlines
Tue 9/16:10 am
SOF
-
PDX
2 stops26h 42m
United Airlines
Deal found 5/2$850
This United Airlines deal was found by Cheapflights users on 5/5. 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.
Thu 7/305:00 am
PDX
-
SOF
2 stops32h 15m
United Airlines
Tue 8/256:10 am
SOF
-
PDX
2 stops22h 01m
United Airlines
Deal found 5/5$864
This KAYAK deal was found by Cheapflights users on 5/5. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/27:00 am
PDX
-
SOF
2 stops30h 15m
Lufthansa
Thu 8/206:10 am
SOF
-
PDX
2 stops21h 33m
Lufthansa
Deal found 5/5$870
This United Airlines deal was found by Cheapflights users on 5/5. 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.
Sun 8/212:50 pm
PDX
-
SOF
2 stops24h 25m
United Airlines
Fri 8/216:10 am
SOF
-
PDX
2 stops37h 11m
United Airlines
Deal found 5/5$872
This KAYAK deal was found by Cheapflights users on 5/5. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/112:50 pm
PDX
-
SOF
2 stops48h 25m
Lufthansa
Thu 8/206:10 am
SOF
-
PDX
2 stops21h 33m
Lufthansa
Deal found 5/5$876
This United Airlines deal was found by Cheapflights users on 5/5. 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 8/111:40 pm
PDX
-
SOF
2 stops37h 35m
United Airlines
Fri 8/216:10 am
SOF
-
PDX
2 stops37h 11m
United Airlines
Deal found 5/5$878
This KAYAK deal was found by Cheapflights users on 5/5. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/211:05 am
PDX
-
SOF
2 stops26h 10m
Lufthansa
Sun 8/237:25 pm
SOF
-
PDX
2 stops32h 18m
Lufthansa
Deal found 5/5$880

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 May 5, 2026.

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$850
(United Airlines)

One-way from

$510
(Kiwi.com)

Popular in

June

Cheapest in

April

Average price

$686
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. 20% potential increase in price ($217 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($54 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 5, 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

Sat 8/1

11:30 pm-11:15 pm

2 stops37h 45m

Sofia

Tue 8/25

6:10 am-8:50 pm

2 stops24h 40m

$821

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sat 8/1

4:15 pm-11:15 pm

2 stops45h 00m

Sofia

Tue 9/1

6:10 am-10:12 am

3 stops38h 02m

$861

PortlandSofia

PDX - SOF

PDXSOF

Portland

Fri 7/31

11:05 am-11:15 pm

2 stops26h 10m

Sofia

Fri 8/21

6:10 am-9:21 am

2 stops37h 11m

$922

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sat 8/1

7:00 am-2:00 pm

2 stops21h 00m

Sofia

Tue 9/1

7:00 am-11:10 am

1 stop14h 10m

$979

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sat 5/16

3:59 pm-11:15 pm

2 stops21h 16m

Sofia

Sat 5/23

1:45 pm-7:05 pm

2 stops39h 20m

$1,084

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 6/8

9:30 am-2:00 pm

2 stops18h 30m

Sofia

Fri 6/19

7:00 am-11:10 am

1 stop14h 10m

$1,097

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sat 5/16

1:05 pm-2:00 pm

1 stop14h 55m

Sofia

Sat 5/23

7:00 am-5:11 pm

2 stops20h 11m

$1,152
Quickest round-trip

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 6/1

1:05 pm-2:00 pm

1 stop14h 55m

Sofia

Mon 6/8

7:00 am-11:10 am

1 stop14h 10m

$1,163

PortlandSofia

PDX - SOF

PDXSOF

Portland

Fri 5/29

1:05 pm-2:00 pm

1 stop14h 55m

Sofia

Fri 6/5

7:00 am-11:10 am

1 stop14h 10m

$1,163
Cheapest one-way

PortlandSofia

PDX - SOF

PDXSOF

Portland

Tue 7/14

3:30 pm-11:35 pm

3 stops22h 05m

$510

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 11 resultsSorted by cheapest first
1
2

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 May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 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 Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Portland-Sofia flight deals on Cheapflights vs. Ovago >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 Ovago the most. Ovago 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, April is the cheapest month in which you can book a flight from Portland to Sofia (average of $595). Flying from Portland to Sofia in June is currently the most expensive (average of $1,427). 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 May 5, 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
1,511 reviews

Entertainment

7.2

Overall

7.8

Comfort

7.7

Food

7.3

Crew

8.4

Boarding

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
KLM
7.8
Good
1,511 reviews
KLM
7.8
Good
1,511 reviews

Entertainment

7.2

Overall

7.8

Comfort

7.7

Food

7.3

Crew

8.4

Boarding

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
United Airlines
7.4
Good
9,683 reviews
KLM
7.8
Good
1,511 reviews

Entertainment

7.2

Overall

7.8

Comfort

7.7

Food

7.3

Crew

8.4

Boarding

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Lufthansa
6.8
Okay
7,974 reviews
KLM
7.8
Good
1,511 reviews

Entertainment

7.2

Overall

7.8

Comfort

7.7

Food

7.3

Crew

8.4

Boarding

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

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 38h 35m. 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 34% 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, April is the cheapest month in which you can book a flight from Portland to Sofia (average of $595). Flying from Portland to Sofia in June is currently the most expensive (average of $1,427). 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 May 5, 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$555Average$758FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$635Average$803FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$639Average$692FlexibilityNo cancel feeOn-time69%

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