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Sofia

$546+ 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 3/5. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SOF
feb. 26 — mar. 51
jue. 2/26
jue. 3/5
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 enero 27, 2026.

This United Airlines deal was found by Cheapflights users on 1/25. 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.
jue. 3/51:30 pm
PDX
-
SOF
2 stops23h 15m
United Airlines
lun. 3/92:20 pm
SOF
-
PDX
2 stops19h 15m
United Airlines
Deal found 1/25$546
This United Airlines deal was found by Cheapflights users on 1/26. 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.
jue. 3/127:49 pm
PDX
-
SOF
2 stops17h 56m
United Airlines
jue. 3/196:00 am
SOF
-
PDX
2 stops21h 47m
United Airlines
Deal found 1/26$596
This FlightHub deal was found by Cheapflights users on 1/25. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 2/93:50 pm
PDX
-
SOF
2 stops20h 55m
Lufthansa
vie. 2/206:10 am
SOF
-
PDX
2 stops22h 39m
Lufthansa
Deal found 1/25$681
This Air France deal was found by Cheapflights users on 1/25. 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.
lun. 2/96:50 am
PDX
-
SOF
2 stops21h 15m
Multiple Airlines
vie. 2/207:00 am
SOF
-
PDX
1 stop14h 25m
Multiple Airlines
Deal found 1/25$683
This United Airlines deal was found by Cheapflights users on 1/25. 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.
lun. 2/97:00 am
PDX
-
SOF
2 stops20h 15m
United Airlines
vie. 2/206:10 am
SOF
-
PDX
3 stops27h 04m
United Airlines
Deal found 1/25$694
This Mytrip deal was found by Cheapflights users on 1/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 3/123:45 pm
PDX
-
SOF
3 stops26h 20m
Multiple Airlines
jue. 3/194:00 pm
SOF
-
PDX
3 stops35h 00m
Multiple Airlines
Deal found 1/26$1,094
This United Airlines deal was found by Cheapflights users on 1/25. 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.
sáb. 5/2312:40 pm
PDX
-
SOF
3 stops24h 10m
United Airlines
mar. 6/26:10 am
SOF
-
PDX
2 stops25h 58m
United Airlines
Deal found 1/25$1,123
This FlightHub deal was found by Cheapflights users on 1/25. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 2/97:05 pm
PDX
-
SOF
3 stops32h 40m
Air Canada
vie. 2/206:10 am
SOF
-
PDX
3 stops37h 05m
Air Canada
Deal found 1/25$1,172
This Air France deal was found by Cheapflights users on 1/26. 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.
sáb. 7/187:00 am
PDX
-
SOF
2 stops21h 00m
Multiple Airlines
jue. 7/237:00 am
SOF
-
PDX
2 stops23h 49m
Multiple Airlines
Deal found 1/26$1,207
This Expedia deal was found by Cheapflights users on 1/25. 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.
sáb. 5/233:10 pm
PDX
-
SOF
1 stop21h 40m
Multiple Airlines
mar. 6/26:10 am
SOF
-
PDX
2 stops24h 06m
Multiple Airlines
Deal found 1/25$1,310

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 enero 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$546
(United Airlines)

Popular in

June

Cheapest in

May

Average price

$1,037
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. 4% potential increase in price ($36 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($46 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 enero 27, 2026.
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

jue. 3/5

1:30 pm-10:45 pm

2 stops23h 15m

Sofia

lun. 3/9

2:20 pm-12:35 am

2 stops19h 15m

$546

PortlandSofia

PDX - SOF

PDXSOF

Portland

jue. 3/12

7:49 pm-10:45 pm

2 stops17h 56m

Sofia

jue. 3/19

6:00 am-6:47 pm

2 stops21h 47m

$596

PortlandSofia

PDX - SOF

PDXSOF

Portland

lun. 2/9

3:50 pm-10:45 pm

2 stops20h 55m

Sofia

vie. 2/20

6:10 am-6:49 pm

2 stops22h 39m

$681

PortlandSofia

PDX - SOF

PDXSOF

Portland

lun. 2/9

6:50 am-2:05 pm

2 stops21h 15m

Sofia

vie. 2/20

7:00 am-11:25 am

1 stop14h 25m

$683

PortlandSofia

PDX - SOF

PDXSOF

Portland

lun. 2/9

7:00 am-1:15 pm

2 stops20h 15m

Sofia

vie. 2/20

6:10 am-11:14 pm

3 stops27h 04m

$694

PortlandSofia

PDX - SOF

PDXSOF

Portland

jue. 3/12

3:45 pm-3:05 am

3 stops26h 20m

Sofia

jue. 3/19

4:00 pm-6:00 pm

3 stops35h 00m

$1,094

PortlandSofia

PDX - SOF

PDXSOF

Portland

sáb. 5/23

12:40 pm-10:50 pm

3 stops24h 10m

Sofia

mar. 6/2

6:10 am-10:08 pm

2 stops25h 58m

$1,123

PortlandSofia

PDX - SOF

PDXSOF

Portland

sáb. 7/18

7:00 am-2:00 pm

2 stops21h 00m

Sofia

jue. 7/23

7:00 am-8:49 pm

2 stops23h 49m

$1,207

PortlandSofia

PDX - SOF

PDXSOF

Portland

sáb. 5/23

3:10 pm-10:50 pm

1 stop21h 40m

Sofia

mar. 6/2

6:10 am-8:16 pm

2 stops24h 06m

$1,310

PortlandSofia

PDX - SOF

PDXSOF

Portland

sáb. 5/23

1:05 pm-2:00 pm

1 stop14h 55m

Sofia

mar. 6/2

7:00 am-11:10 am

1 stop14h 10m

$1,381

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/24

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 January.
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.

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 enero 27, 2026.
Read reviews from past customers who have flown KLM, United Airlines, and Lufthansa 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
1,443 reviews

Boarding

7.8

Comfort

7.6

Overall

7.7

Food

7.3

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
KLM
7.7
Good
1,443 reviews
KLM
7.7
Good
1,443 reviews

Boarding

7.8

Comfort

7.6

Overall

7.7

Food

7.3

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
United Airlines
7.4
Good
9,205 reviews
KLM
7.7
Good
1,443 reviews

Boarding

7.8

Comfort

7.6

Overall

7.7

Food

7.3

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Lufthansa
6.8
Okay
7,748 reviews
KLM
7.7
Good
1,443 reviews

Boarding

7.8

Comfort

7.6

Overall

7.7

Food

7.3

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.

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 and Lufthansa can get you from Portland to Sofia in just under 20h 55m. Your travel time can differ by up to 2h 20m. 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 $555. Other airlines that can offer you cheap pricing are Lufthansa, from $635, and United Airlines, from $639. KLM is priced at 37% 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 enero 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$555Average$825FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$635Average$831FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$639Average$896FlexibilityNo cancel feeOn-time69%

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