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Sofia

$418+ 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 10/4. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SOF
Aug 31 — Sep 71
Mon 8/31
Mon 9/7
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 August 1, 2026.

This Justfly.com deal was found by Cheapflights users on 7/30. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/42:34 pm
PDX
-
SOF
2 stops22h 21m
Multiple Airlines
Sun 11/86:25 am
SOF
-
PDX
2 stops24h 21m
Multiple Airlines
Deal found 7/30$782
This oojo deal was found by Cheapflights users on 7/28. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/43:40 pm
PDX
-
SOF
2 stops21h 05m
Lufthansa
Sun 11/86:25 am
SOF
-
PDX
2 stops24h 37m
Lufthansa
Deal found 7/28$788
This Air Canada deal was found by Cheapflights users on 7/30. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/410:00 am
PDX
-
SOF
3 stops22h 20m
Air Canada
Sun 11/86:25 am
SOF
-
PDX
2 stops22h 06m
Air Canada
Deal found 7/30$820
This Justfly.com deal was found by Cheapflights users on 7/30. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/138:15 am
PDX
-
SOF
2 stops29h 00m
Multiple Airlines
Fri 10/96:20 am
SOF
-
PDX
2 stops37h 11m
Multiple Airlines
Deal found 7/30$825
This United Airlines deal was found by Cheapflights users on 7/29. 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.
Tue 9/18:25 am
PDX
-
SOF
2 stops24h 15m
United Airlines
Wed 9/166:20 am
SOF
-
PDX
2 stops22h 51m
United Airlines
Deal found 7/29$836
This United Airlines deal was found by Cheapflights users on 7/29. 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 9/135:00 am
PDX
-
SOF
2 stops27h 40m
United Airlines
Fri 10/96:20 am
SOF
-
PDX
2 stops26h 37m
United Airlines
Deal found 7/29$841
This Expedia deal was found by Cheapflights users on 7/29. 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 10/510:10 am
PDX
-
SOF
2 stops17h 15m
Multiple Airlines
Fri 10/236:20 am
SOF
-
PDX
2 stops22h 46m
Multiple Airlines
Deal found 7/29$843
This United Airlines deal was found by Cheapflights users on 7/29. 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 9/28:25 am
PDX
-
SOF
2 stops28h 25m
United Airlines
Wed 9/166:20 am
SOF
-
PDX
2 stops18h 26m
United Airlines
Deal found 7/29$847
This United Airlines deal was found by Cheapflights users on 7/29. 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 9/511:02 pm
PDX
-
SOF
2 stops38h 13m
United Airlines
Wed 9/166:20 am
SOF
-
PDX
3 stops26h 33m
United Airlines
Deal found 7/29$852

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 August 1, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$750
(United Airlines)

One-way from

$418
(Kiwi.com)

Popular in

June

Cheapest in

April

Average price

$1,014
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. 13% potential increase in price ($138 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 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 August 1, 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

Sun 1/10

7:00 am-1:15 pm

2 stops20h 15m

Sofia

Wed 1/13

6:25 am-11:12 pm

2 stops26h 47m

$750

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sun 9/13

5:00 am-6:40 pm

2 stops27h 40m

Sofia

Fri 10/9

6:20 am-9:00 pm

2 stops24h 40m

$841
Quickest round-trip

PortlandSofia

PDX - SOF

PDXSOF

Portland

Wed 11/4

10:00 am-6:20 pm

3 stops22h 20m

Sofia

Sun 11/8

6:00 am-2:41 pm

3 stops18h 41m

$843

PortlandSofia

PDX - SOF

PDXSOF

Portland

Tue 9/1

8:25 am-6:40 pm

2 stops24h 15m

Sofia

Tue 9/15

6:10 am-7:18 pm

2 stops23h 08m

$846

PortlandSofia

PDX - SOF

PDXSOF

Portland

Tue 8/25

7:16 am-6:40 pm

2 stops25h 24m

Sofia

Tue 9/8

6:10 am-8:10 pm

2 stops24h 00m

$846

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 10/5

12:45 pm-11:15 pm

2 stops24h 30m

Sofia

Fri 10/23

6:20 am-10:57 pm

3 stops26h 37m

$871

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sat 10/17

11:59 pm-11:15 pm

2 stops37h 16m

Sofia

Sat 10/31

2:00 pm-7:24 pm

2 stops38h 24m

$877

PortlandSofia

PDX - SOF

PDXSOF

Portland

Fri 9/4

12:55 pm-11:15 pm

2 stops48h 20m

Sofia

Fri 9/25

6:20 am-9:27 pm

2 stops25h 07m

$898
Cheapest one-way
Quickest one-way

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sun 10/4

8:30 am-12:10 pm

2 stops17h 40m

$455

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sun 10/4

7:30 pm-11:15 pm

1 stop17h 45m

$918

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Sorted by cheapest first

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 August.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice 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 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, 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 $1,280). 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?

Airfare is below average for this route at the moment.

Portland to Sofia flights typically cost between $934 and $1,104 in January.
The cheapest round-trip price found within the last 5 days was $750 on United Airlines (Jan 10-Jan 13).

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 August 1, 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
1,552 reviews

Boarding

7.8

Crew

8.4

Entertainment

7.2

Overall

7.8

Comfort

7.7

Food

7.3

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
1,552 reviews
KLM
7.8
Good
1,552 reviews

Boarding

7.8

Crew

8.4

Entertainment

7.2

Overall

7.8

Comfort

7.7

Food

7.3

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
10,062 reviews
KLM
7.8
Good
1,552 reviews

Boarding

7.8

Crew

8.4

Entertainment

7.2

Overall

7.8

Comfort

7.7

Food

7.3

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
8,176 reviews
KLM
7.8
Good
1,552 reviews

Boarding

7.8

Crew

8.4

Entertainment

7.2

Overall

7.8

Comfort

7.7

Food

7.3

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 and Air Canada can get you from Portland to Sofia in just under 20h 15m. Your travel time can differ by up to 2h 05m. 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 $555, and United Airlines, from $666. KLM 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, 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 $1,280). 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 August 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$555Average$807FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$555Average$1,084FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$666Average$771FlexibilityNo cancel feeOn-time69%

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